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AD7689-KGD: Known Good Die Data Sheet (Rev. E)7/28/2017PDF270 K
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AD7682/AD7689: 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADCs Data Sheet (Rev. J)6/9/2008PDF736 K
Overview
Features and Benefits
- Download AD7689-KGD Data Sheet. Available as Known Good Die and fully guaranteed to data sheet specifications.
- 16-bit resolution with no missing codes
- 4-channel (AD7682)/8-channel (AD7689) multiplexer with choice of inputs
- Unipolar single-ended
- Differential (GND sense)
- Pseudobipolar
- Throughput: 250 kSPS
- INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)
- Dynamic range: 93.8 dB
- SINAD: 92.5 dB at 20 kHz
- THD: −100 dB at 20 kHz
- Analog input range: 0 V to VREF with VREF up to VDD
- Multiple reference types
- Internal selectable 2.5 V or 4.096 V
- External buffered (up to 4.096 V)
- External (up to VDD)
- Internal temperature sensor (TEMP)
- Channel sequencer, selectable 1-pole filter, busy indicator
- No pipeline delay, SAR architecture
- Single-supply 2.3 V to 5.5 V operation with 1.8 V to 5.5 V logic interface
- Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP
- Power dissipation
- 3.5 mW at 2.5 V/200 kSPS
- 12.5 mW at 5 V/250 kSPS
- Standby current: 50 nA
- Low cost grade available
- 20-lead 4 mm × 4 mm LFCSP package
- 20-lead 2.4 mm × 2.4 mm WLCSP package
Product Details
The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a single power supply, VDD.
The AD7682/AD7689 contain all components for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer that is useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal low drift reference (selectable 2.5 V or 4.096 V) and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.
The AD7682/AD7689 use a simple serial port interface (SPI) for writing to the configuration register and receiving conversion results. The SPI interface uses a separate supply, VIO, which is set to the host logic level. Power dissipation scales with throughput.
The AD7682/AD7689 are housed in a tiny 20-lead lead frame chip scale package (LFCSP) and 20-lead wafer level chip scale package (WLCSP) with operation specified from −40°C to +85°C. The AD7689 includes an extended temperature range model with specifications guaranteed to a maximum temperature (TMAX) of +125°C.
APPLICATIONS
- Multichannel system monitoring
- Battery-powered equipment
- Medical instruments: ECG/EKG
- Mobile communications: GPS
- Power line monitoring
- Data acquisition
- Seismic data acquisition systems
- Instrumentation
- Process control
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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EE-395: Interfacing the AD7689 ADC to ADSP-BF70x Blackfin+™ Processors (Rev. 1)12/15/2016PDF665 K
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AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015PDF427 K
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AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)2/14/2015PDF299 kB
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The Data Conversion Handbook, 20051/2/2005
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MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design2/14/2015PDF152 kB
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MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"3/20/2009PDF144 kB
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
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CN-0254: Low Cost, 16-Bit, 250 kSPS, 8-Channel, Isolated Data Acquisition System12/30/2013PDF394 kB
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生体情報監視用のウェアラブル・プラットフォーム3/3/2022 -
Wearable VSM Demonstration Platform3/3/2022 -
可穿戴式VSM演示平台3/3/2022
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Design, Development, and Evaluation of a System to Obtain Electrodermal Activity1/19/2018
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The Sensors Behind the GEN II Wearable Device9/1/2017
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Exploring Different SAR ADC Analog Input Architectures1/1/2016
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Integrated Multiplexed Input ADC Solution Alleviates Power Dissipation and Increased Channel Density Challenges1/1/2016 Analog Dialogue
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Successive-Approximation ADCs: Ensuring a Valid First Conversion12/1/2013 Analog Dialogue
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Designing Power Supplies for High Speed ADC2/1/2012
Software & Systems Requirements
Tools & Simulations
IBIS Models
Reference Designs (1)
Product Recommendations
AD7689 Companion Parts
Recommended Digital Isolators
- For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
- For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.
- For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
- For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.
Recommended Driver Amplifiers
- For high frequency, low noise, low distortion applications: ADA4807-1, ADA4807-2, ADA4897-1, ADA4897-2.
- For low frequency, precision, low bias current applications: ADA4627-1, ADA4637-1, AD8610.
- For precision, low power, low distortion applications: ADA4805-1, ADA4805-2, ADA4841-1, ADA4841-2.
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
AD7689 Discussions
RE: Problem with sequencer of AD7689
2 week(s) ago in Precision ADCs
RE: AD7689 - Garbage conversion results
19 week(s) ago in Precision ADCs
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.