Spi audio adc. 從 TI 的 音訊 ADC 系列裝置中選擇。音訊 ADC 參數、產品規格表與設計資源。 Sep 15, 2023 · Hi I am trying to make an analog synthesizer, and for this is using a STM32G431 with some 8-channel DAC’s (connected via SPI) for generating control-voltages for the VCA’s and other circuits. Operating from single 1. Jan 15, 2013 · CE = 0 # CE0 or CE1, select SPI device on bus # setup and open an SPI channel spi = spidev. It's super easy to use and uses SPI so only 4 pins are required. General Description The CS5308P is a high-performance, 32-bit resolution, eight-channel ADC. The MCP3008 features a successive approximation register (SAR) architecture and an industry-standard SPI serial interface, allowing 10-bit ADC capability to be added to any PIC® microcontroller. \\n The two DACs are connected to the SPI master port of the ADAU1467, I am using the MP6 and MP7 pins as chip selects. Microchip Technology Select from TI's Analog-to-digital converters (ADCs) family of devices. It features two 24-bit conversion channels each with programmable gain amplifier (PGA), multi-bit sigma-delta modulator and decimation filters. \\n The schematic diagram of the DSP connection with the two DACs and the three ADCs is shown in the figure below. STM32 ADC DMA and Interrupts. The value coming from the ADC's DO pin is correct. Adafruit Industries, Unique & fun DIY electronics and kits MCP4725 Breakout Board - 12-Bit DAC with I2C Interface [STEMMA QT / qwiic] : ID 935 - Your microcontroller probably has an ADC (analog -> digital converter) but does it have a DAC (digital -> analog converter)??? Now it can! This breakout board features the easy-to-use MCP4725 12-bit DAC. Feb 19, 2022 · Hi all, I am using the NUCLEO-F446RE with the STM32F446RE. And Temperature Sensor. Mouser offers inventory, pricing, & datasheets for I2C, SPI Audio CODECs. . Jul 8, 2008 · Information furnished by Analog Devices applications and development tools engineers is believed to be accurate and reliable, however no responsibility is assumed by Analog Devices regarding technical accuracy and topicality of the content provided in Analog Devices Engineer-to-Engineer Notes. The STM32F411 chip in LQFP-100 package, for example, sports five I2S interface blocks that can be used to interface with an audio ADC, DAC or codec. Mouser is an authorized distributor for many audio A/D converter IC manufacturers including including Analog Devices, Asahi Kasei Microdevices (AKM), Cirrus Logic, Texas Instruments & more. It's super easy to use, and uses SPI so only 4 pins are required. This repository is a collection of firmware examples for controlling * The throughput of your PulSAR ADC will be limited to the SPI bus speed of your platform. \\n I\\u0026#39;m using the ADAU1467 DSP and I need to configure two AD1933 DACs and three ADAU1979 ADCs. 8 V p-p. Something in the separate configurations for the DMA to both peripherals is causing jitter to the audio going out to the DAC, which comes out as an audible 'crackling' distortion of the sound. # Otherwise, use a GPIO pin to drive the !LDAC pin low. These peripheral devices may be a serial EEPROM, shift register, display driver, Analog-to-Digital Converter (ADC), or an audio codec. The AD74111 is particularly suitable for a variety of applications where mono Jul 17, 2015 · Introduction to the Arduino SPI Library with example sketch for the LTC1286 12 Bit ADC and the DAC714 16 bit DAC. 8 V analog supply. Analog Devices has the industry’s largest portfolio of DACs covering 8 to 20 bits in resolution, best in class performance, smallest footprint, lowest power, and ease of use features. SPI 16 bit Analog to Digital Converters - ADC are available at Mouser Electronics. Voice band data is accepted by the audio Jul 12, 2018 · I am trying to understand why we use I2S is better for transferring audio than SPI as I2S has less bandwidth compare to SPI. I am using an ADC0831 8 bit convertor. The three primary protocols commonly used are SPI (Serial Peripheral Interface), I2C (Inter-Integrated Circuit), and parallel communication. The majority of examples may be found in the following products: The STM32MP151 line offers the performance of a single Cortex-A7 core (with floating point unit and NEON SIMD Engine) running up to 800 MHz, plus a Cortex-M4 with FPU which offer up to 703 Coremark at 209 MHz f MCU for real time peripheral processing. Number of ADC channels 4 Sampling rate (max) (kHz) 768 Analog inputs 4 Control interface I2C, SPI Digital audio interface I2S, L, TDM THD+N (dB) -98 ADC SNR (typ) (dB) 120 Rating Catalog Operating temperature range (°C) -40 to 125 Analog outputs 0 The Analog-to-Digital Converter (ADC) is a type MCP3008 and is connected via SPI bus to one of the two "Programmable Real-Time Units" included with the Beaglebone system. I have been struggling to meet the timing that The ADC (analog-to-digital converter or A/D converter) curriculum is segmented into major topic learning categories, each of which contains short training videos, multiple choice quizzes, and short answer exercises. If the SPI has only one or multiple of daisy chained ADCs on the bus and nothing else, consider tuning the SPI frequency for continuous conversion without the need of the interrupt. A more sensible maximum is probably around 20 MHz, but this will depend on the way you've wired up the ADC. Other features include an on-chip, stereo attenuator and mute, programmed through an SPI-compatible serial control port. ESP32 audio sampling is a practical ESP32 project for this next-generation microcontroller. Re: ADC audio via SPI Sun Aug 19, 2012 9:33 am Its not "Linux" that is the problem, its any multitasking OS no specifically designed to be hard real time, (Linux, but also Windows, and OS X) but I agree with you in principle, on an Arduino it would probably work well (although it would probably still be necessary to add an anti aliasing filter before the input of the ADC). The thing is that Sep 25, 2024 · This tutorial goes through the process of setting up a Raspberry Pi ADC (Analog to Digital Converter). For example, if you are using the SDP platform the max bus rate on the SPI is 30 MHz. Precision ADCs Analog Devices provides an unrivaled portfolio for precision analog-to-digital converters (ADCs). In this case you usually have both a DAC and an ADC available which needs to be configured via I2C before it can be used. The ADC channel provides >67 dB THD+N and the DAC channel pro-vides >88 dB THD+N, both over an audio signal bandwidth. This section describes the steps required to build and use the SPI bus on Linux using an ADSP -SC5xx board. The high speed ADC SPI program allows the user to control advanced features on high speed, analog-to-digital converters (ADCs) with SPI capability. Mouser offers inventory, pricing, & datasheets for SPI 16 bit Analog to Digital Converters - ADC. Can anyone recommend any 16 bit DAC and ADC chips, ideally on breakout boards? (I'd like to read in the audio with the ADC, filter it in software, and output it through the DAC). TI’s new TAA5242 audio ADCs and TAD5242 audio DACs offer performance increase in a highly integrated pin-control device. The About two ad5754 dacs and a ad7606 adc using a single SPI bus in teensy audio library The TLV320AIC3254 includes a stereo audio ADC, which uses a delta-sigma modulator with a programmable oversampling ratio, followed by a digital decimation filter. It features a multibit - A/D conversion channel and a multibit - D/A conversion channel. Precision Analog to Digital Converters from Texas Instruments are specialized mixed signal products mainly used in signal acquisition and sensor applications. ADI switches and multiplexers are used in a wide and growing range of applications from industrial and instrumentation to medical, consumer, communications, and automotive systems. Input types may be differential, pseudo differential or single-ended. Learning to use this ADC will also be a good beginner exercise in using Serial Peripheral Interface (SPI). The I2S protocol is widely used to transfer audio data from a microcontroller/DSP to an audio codec in order to play melodies (stored in a memory) or, to capture analog sound (from a microphone). An I2C/serial peripheral interface (SPI) control port is included that allows a microcontroller to adjust volume and many other parameters. I would bet most Audio ADCs that are 24 bit would be at least 48 or 96 KHz. About this item High-Precision AD HAT for Raspberry Pi ( 4B/3B+/3B/2B/Zero/Zero W/Zero WH) and Jetson Nano Adopts ADS1263 chip, low noise, low temperature drift, 10-ch 32-bit high precision ADC (5-ch differential input), 38. Find parameters, ordering and quality information For converting digital I2S audio from your ESP32/RP2350 or Raspberry Pi, you'll need a digital-to-analog converter (DAC). A software-selectable scan mode allows reading the ADC results while simultaneously updating the DAC. The ADS7028 is a small, eight-channel, multiplexed, 12-bit, 1-MSPS, analog-to-digital converter (ADC) with an enhanced-SPI serial interface. In addition to a digital high pass filter to remove DC offset voltages, the ADC also features voice band digital filtering. Each channel provides 105 db of dynamic range, making the AD1871 suitable for applications such as GENERAL DESCRIPTION The ADAU1962A is a high performance, single-chip digital-to-analog converter (DAC) that provides 12 DACs with differential or single-ended outputs using the Analog Devices, Inc. This chip will add 8 channels of 10-bit analog input to your microcontroller or microcomputer project. With integrated features enabling simplified designs, our audio ADCs can help your system overcome environmental challenges and improve the performance of voice capture and voice command functionality. The SPI outputs to a dual channel 12 bit DAC for audio. Dec 4, 2012 · The SPI interface provides throughput of 1600ksps; 4 channels at 400ksps per channel or 2 channels at 800ksps per channel. The program and para-meter/data RAMs can be loaded with a custom audio processing signal flow built with the SigmaStudio graphical programming software from Analog Devices, Inc. 5V internal reference voltage, 8x multiplexing GPIO, PGA (32 times Max The AD4880 is dual-channel, low noise, high speed, low distortion, 20-bit, successive approximation register (SAR) analog-to-digital converter (ADC) with integrated fully differential drivers (FDA) and gain setting resistors. Analog-to-digital converters (ADCs) parameters, data sheets, and design resources. It is comprised of a multibit, Σ-Δ modulator, digital interpolation filters, and analog output drive circuitry. The digital input/outputs can be accessed by the SPI or the general-purpose input/output (GPIO) pins to support higher speed data rates. open(0,CE) spi. As an example, we will store audio files in the external flash. STM32 ADC Tutorial + Examples. I tested the ADC and the code by using a voltage regulator. 8M/s sampling. While CS is low, the signals SPI 12 bit Analog to Digital Converters - ADC are available at Mouser Electronics. Apr 29, 2023 · Most external ADC (Analog Device and co) uses the SPI clock for the conversion, especially if they are SAR type. INTRODUCTION This application note describes how to use the serial peripheral interface (SPI) port on Analog Devices, Inc. As Brett mentioned, it may be possible to connect an I2S device, like the ADMP441, to an SPI port. 4kSPS Max sampling rate with embedded 24-bit auxiliary ADC, internal ADC test signal, IDAC, 2. Each of these has distinct characteristics Nov 13, 2023 · Hello support team. 24-bit stereo ADC with 8 kHz to 192 kHz sample rates Digital volume control with autoramp function I2C/SPI controllable for flexibility Software-controllable clickless mute Software power-down Right justified, left justified, I2S, and TDM modes Master and slave operation modes The versatile Flexi-SPI serial peripheral interface (SPI) eases host processor and ADC integration. Using an ADC pin for audio input currently has only "experimental" software support. Apr 5, 2024 · The only way you will achieve anything like 66 MHz is with a custom PCB, using short tightly-controlled tracks between the CPU and ADC. Connect headphones or powered speakers to J10 (OUT1) (see Figure 12). 25 SPs to 3840 SPs. I would be happy to achieve ~0. Adafruit Industries, Unique & fun DIY electronics and kits ADS1115 16-Bit ADC - 4 Channel with Programmable Gain Amplifier [STEMMA QT / Qwiic] : ID 1085 - For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at 860 samples/second over I2C. Typically, the digital output is a two's complement binary number that is proportional to the input. Jun 30, 2022 · How to create a driver to handle External flash memory using SPI? This article will guide you through creating the necessary driver code to interface a STM32 with an external SPI flash memory. Typical applications include interfacing microcontrollers with peripheral chips for Secure Digital cards, liquid crystal displays, analog-to-digital and digital-to-analog converters, flash and EEPROM memory, and various communication chips. Jun 3, 2019 · Does anyone have any suggestions for shielding the mic/ADC from noise from the SPI lines? Here is a screenshot of the audio file in Audacity that shows the "ticking" sound. 98V and clock rates up to 50MHz. MQS Output This pulsed digital output which blends PWM with oversampling & noise shaping can be used to drive small speakers. The ADC to SPI subsystem example demonstrates how to use the internal ADC to convert an analog signal into a digital representation and transfer the result through SPI. I can use the onboard ADC, but it's lower resolution (10 bit) and I'd like to Audio A/D Converter ICs are available at Mouser Electronics from industry leading manufacturers. Mar 17, 2025 · Analog Devices offers a comprehensive portfolio of switches and multiplexers covering single to multiple switch elements with various signal ranges in a variety of packages to best suit customer application needs. This allows direct access to registers and status information on subordinate transceivers, as well as I2C to I2C, SPI to I2C, or SPI to SPI communication from the host to a Table 1. Designers can also access and harness the full performance and flexibility of the programmable software-controlled ADC (TAA5212) and DAC (TAD5212) for professional audio Apr 7, 2011 · Introduction Here is a tutorial/recommendation for those who need a high-precision [24-bit] analog to digital converter (ADC) that is easy to use (SPI but just 2 wires, and ADC itself has only 8 pins) and is fast (40,000 samples per second). Find parameters, ordering and quality information Analog Devices provides an unrivaled portfolio for precision analog-to-digital converters (ADCs). Analog | Embedded processing | Semiconductor company | TI. PRODUCT OVERVIEW The AD1871 is a stereo audio ADC intended for digital audio applications requiring high performance analog-to-digital conversion. I wan Jun 3, 2023 · Hello, I'm trying to run both the ADC and SPI at a rate of 96khz using separate DMA channels. Generally, these products communicate with a micro-controller or FPGA as an SPI or I2C peripheral to configure internal settings and transmit digitized analog signals. CrossCore Embedded Studio includes a minimal number of examples. Product Comparison Guide peripheral in a subordinate node. Adafruit Industries, Unique & fun DIY electronics and kits ADS1015 12-Bit ADC - 4 Channel with Programmable Gain Amplifier [STEMMA QT / Qwiic] : ID 1083 - For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1015 provides 12-bit precision at 3300 samples/second over I2C. max_speed_hz = spi_max_speed # transfer of the data to the output of the DAC can be done at the rising edge # of the !CS pin, in which case the !LDAC pin can be tied to GND. , high speed converters. The bus is composed of two data pins, one clock pin, and one chip select pin: Applied Filters: Semiconductors Audio ICs Audio CODECs Interface Type = SPI Reset All Please modify your search so that it will return results. Serial (I2C, SPI) Audio CODECs are available at Mouser Electronics. 6 mW Power Consumption. Or the output may be low-pass filtered to give analog signals. The chip can be configured as 4 single-ended input channels, or two Aug 13, 2018 · ADI’s ADGS1408/ADGS1409 are analog multiplexers comprising eight single channels and four differential channels, respectively. A wide data clocking window, multiple SDO lanes, and optional dual data rate (DDR) data clocking can reduce the serial clock to 10 MHz while operating at a sample rate of 2 MSPS or 500 kSPS. I2C, SPI Audio CODECs are available at Mouser Electronics. Here is a video of what is happening to the audio Jun 3, 2024 · 8 Overview Need to add analog inputs? This chip will add 8 channels of 10-bit analog input to your microcontroller or microcomputer project. Apr 23, 2020 · In addition to the optional SPI, the AD7134 has a flexible and independent data interface for transmitting the ADC output data. 25 LSB DNL (typ) accuracy over the temperature range of -40°C to +105°C. ADC Timing Diagram The ADC can provide samples at up to 3M/s. Serial peripheral interface (SPI) is one of the most widely used interfaces between microcontroller and peripheral ICs such as sensors, ADCs, DACs, shift registers, SRAM, and others. The tip of the plug is the left channel analog audio, the ring is the right channel analog audio, and the sleeve is the common or ground. DACs are often used in music players to convert digital data streams into analog audio signals. 5MSPS, 12-bit analog-to-digital converter (ADC) with SPI, GPIOs and CRC. This article provides a brief description of the SPI interface followed by an introduction to Analog Devices’ SPI enabled switches and muxes, and how they help reduce the number of digital GPIOs in system board Oct 5, 2012 · SPI and I2S ports are similar, but there are a few key differences between them. Oct 25, 2018 · Need to add analog inputs? This chip will add 8 channels of 10-bit analog input to your microcontroller or microcomputer project. The Adafruit PCM5122 I2S DAC is both powerful and easy to use - with excellent audio quality! I'm looking to get comfortable using an ARM M4 board I've acquired recently, and want to work on implementing some DSP algorithms on audio. SpiDev() spi. A serial peripheral interface (SPI)/I2C port is included, allowing a microcontroller to adjust INTRODUCTION The Serial Peripheral Interface (SPI) module is a synchronous serial interface useful for communicating with external peripherals and other microcontroller devices. A complete list of features can be found in the specific product's data sheet and in the Application Note: High Speed ADC SPI Control Software (pdf). Precision DACs Precision digital-to-analog converters (DACs) are critical data conversion components for high-performance signal processing systems. I would like to use the SPI with DMA, and have looked at the RM chapters, understood some of it, but feel I TI’s ADS1243 is a 24-Bit ADC, 8 Ch, PGA 1:128, 50/60 Hz Notch, 0. , patented multibit sigma-delta (Σ-Δ) architecture. Mouser offers inventory, pricing, & datasheets for SPI 12 bit Analog to Digital Converters - ADC. Explore our portfolio of ADCs for high performance in smart home and automotive applications. ADCs are selected by number of bits, sampling rate The key requirements for professional audio market segment involve high-performance audio technology. To use the less than or greater than function, please select a value first. In your design, you would map them like: In a typical SPI transaction, the chip select (CS) pin is low while the data transfer is occurring. These peripheral devices may be a serial EEPROM, shift register, display driver, Analog-to-Digital Converter (ADC) or an audio codec. TI’s ADS7038H is a 8-channel, 1. ADC Formula, sampling, resolution, ADC calibration An extension of the control port protocol is embedded in the A2B data stream. In addition, this application note defines the electrical, timing, and procedural requirements for interfacing to these devices. Instead I would recommend going with something like this that provides you with SPI like you want and has a selectable sample rate between 6. The device contains a low noise, 24-bit Σ-Δ analog-to-digital converter (ADC) and can be configured to have four differential or eight single-ended or pseudodifferential inputs. Besides muting and gain control, one of the really useful settings on ADCs like the AD1871 is the ability to place it in power-down mode. The ADCs use a multibit sigma-delta (Σ-Δ) architecture with continuous time front end for low EMI. The device features ±1 LSB INL (max) accuracy and a ±0. 25dB to handle both amplified microphones. The implementation is compatible with industry-standard SPI ports and employs, at minimum, a 2-wire mode and optional TI’s ADS8319 is a Precision 16-Bit SAR Analog-to-Digital Converter (ADC) With SPI Interface. When you select an ADI precision ADC, you are selecting from the industry-leading portfolio in AC and DC performance, power, speed, and size, with products ranging from 8-bit to 32-bit resolution. You can refer to this previous article on h Analog Input (ADC) 1 analog input pins may be used for audio inputs. The AD1852 is fully compatible with all known Introduction This article describes the steps required to interface a microprocessor-based system using a serial peripheral interface (SPI) port of the quad and octal family of serial analog-to-digital converters (ADCs) listed in Table 1. The Serial Peripheral Interface (SPI) module is a synchronous serial interface useful for communicating with external peripherals and other microcontroller devices. The data interface can act as either a bus master or a slave with various clocking options to support multiple communication bus protocols. It is basically the opposite of ADC!. 08V up to 1. The ADC uses a differential architecture, optimized for GENERAL DESCRIPTION The ADAU1978 incorporates four high performance, analog-to-digital converters (ADCs) with 2 V rms capable ac-coupled inputs. In this tutorial, we will explain the basic principles of Analog to Digital Converter (ADC) and Direct Memory Access (DMA) of the STM32 microcontroller. The I2SCodecStream and AudioBoardStream classes can used both as audio The AD4195-4 is a low noise, completely integrated analog front end for high precision measurement applications. The serial peripheral interface (SPI) and MICROWIRE ® -compatible, 4-wire serial interface operates on logic levels as low as 1. Find parameters, ordering and quality information DAC (Digital-to-Analog Converter) explained: DAC is a system that converts a digital signal into an analog signal. The microphone amplifiers have a programmable gain from -12dB to +35. The CS5308P uses a 5th-order, multibit sigma-delta modulator followed by digital filtering and decimation. 8V supply to ensure low-power consumption, the MAX9880A offers variety of and output Aug 18, 2012 · ADC audio via SPI 12 posts • Page 1 of 1 raspje Posts: 2 Joined: Sat Aug 18, 2012 1:57 pm Sep 13, 2002 · The AD1871 is a stereo audio ADC intended for digital audio applications requiring high performance analog-to-digital conversion. Maintaining high perform Jun 27, 2025 · When it comes to interfacing Analog-to-Digital Converters (ADCs) with microcontrollers, selecting the appropriate communication protocol is crucial for ensuring efficient data transfer and optimal performance. The signals of the two standards are similar. The AD74416H features a 16-bit digital-to-analog converter (DAC) per channel and a single 24-bit, Σ-Δ analog-to-digital converter (ADC). The Beaglebone series of development boards with AM335X Sitara System-On-Chip contain two "Programmable Real-Time Units". The STM32MP151C integrates a crypto processor providing hardware acceleration for AES-128, -192 and -256, with support for GCM and CCM, Triple The audio signals must be single-ended and line level with a maximum voltage of 2. Control it via I2C and send it the value you The analog inputs have PGA on the front end, allowing dynamic range optimization with a wide range of input sources. The ADAU1787 is a low power audio codec with optimized audio processing cores, making the device ideal for noise cancelling applications that require high quality audio, low power, small size, and low latency. Please view our large selection of audio A/D converter ICs below. The Serial Peripheral Interface (SPI) bus is a four wire master/slave full duplex synchronous bus. To get you started, we will show you how to interface multiple channels ADC using DMA in STM32 Nucleo development Board and STM32Cube IDE. Audio codecs with a separate SPI control port allow a host processor to change the ADC settings on the fly. GENERAL DESCRIPTION The AD1852 is a complete, high performance, single-chip, stereo digital, audio playback system. The eight channels of the ADS7028 can be individually configured as either analog inputs, digital inputs, or digital outputs. You can hook up multiple slave devices by utilizing chip select lines. I am trying to interface with an external dual sampling differential ADC: ADS9224R. \\n The three ADCs are connected to If you only need 10 Hz sampling then an audio ADC seems like overkill. The ADAU1761 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 14 mW from a 1. The CS5308P supports differential analog input, and 32-bit digital output via the audio serial port (ASP) at sample rates up to 768 kHz. STM32 audio codec interfacing is made easy with the chips often being armed with several I2S peripherals multiplexed with the SPI peripheral on board. GENERAL DESCRIPTION The AD74111 is a front-end processor for general-purpose audio and voice applications. Products are available in a range of architectures, including successive approximation (SAR) ADCs, Σ Feb 14, 2012 · The MAX5316 is a high-accuracy, 16-bit, serial SPI input, buffered voltage output digital-to-analog converter (DAC) in a 4mm x 5mm, 24-lead TQFN package. The Oct 25, 2018 · Need to add analog inputs? This chip will add 8 channels of 10-bit analog input to your microcontroller or microcomputer project. Mouser offers inventory, pricing, & datasheets for Serial (I2C, SPI) Audio CODECs. Analog-to-digital converters (ADC, A/D, or A-to-D) sample an analog signal, such as a sound picked up by a microphone or the output of a sensor, into a digital signal. com You can use many boards or modules which are using I2S based audio codecs that need to be configured. It features two 24-bit conversion channels each with programmable gain amplifier (PGA), multibit sigma-delta modulator, and decimation filters. The chip can be configured as 4 single-ended input channels or two Apr 7, 2016 · I am trying to read mic output via SPI. In this article, we look at our options for connecting an I2S audio codec with STM32 chips. Oct 5, 2020 · The MAX9880A is high-performance, stereo audio codec designed for portable consumer applications such as smartphones and tablets. The STM32L1xx allows I2S audio communication using the SPI peripheral, and implements specific functionalities for this communications mode. We make use of the MCP3008. Although SPI is a synchronous serial interface, [2] it is different from Synchronous Serial Interface (SSI). Sampling its ADC from a timer interrupt using the Arduino IDE is the topic of this ESP32 tutorial. pnurzttvveusvjnvwvm8fa00c4ji6ksnt44arm1w6a8bf