AD7691
18-Bit, 1.5 LSB INL, 250 kSPS PulSAR® Differential ADC in MSOP/QFN
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Features
- 18-bit resolution with no missing codes
- Throughput: 250 kSPS
- INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR)
- Dynamic range: 102 dB typical at 250 kSPS
- Oversampled dynamic range: 125 dB at1 kSPS
- Noise-free code resolution: 20 bits at 1 kSPS
- Effective resolution: 22.7 bits at 1 kSPS
- See data sheet for additional features
- Download AD7691-EP data sheet (pdf)
- Military temperature range: –55°C to +105°C
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
- V62/14632-01XE DSCC Drawing Number
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The AD7691 is an 18-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V and 5 V. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.
The part’s power scales linearly with throughput.
The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply.
The AD7691 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Data acquisitions
- Seismic data acquisition systems
- Instrumentation
- Medical instruments
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
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Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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AD7691
Documentation
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Data Sheet
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AD7691: 18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/LFCSP Data Sheet (Rev.E)
AD7691: MSOP/QFNパッケージ採用の1.5LSB INL、250kSPS、18ビットPulSAR差動A/Dコンバータ (Rev.A)
User Guide
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Data Sheet 3
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Product Selection Guide 1
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Technical Book 1
Tutorial 4
Device Drivers 1
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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| AD7691BCPZRL7 |
10-Lead LFCSP (3mm x 3mm)
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| AD7691BRMZ |
10-Lead MSOP
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| AD7691BRMZ-RL7 |
10-Lead MSOP
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| AD7691SRMZ-EP-RL7 |
10-Lead MSOP
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- AD7691BCPZRL7
- Pin/Package Drawing
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10-Lead LFCSP (3mm x 3mm)
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD7691BRMZ
- Pin/Package Drawing
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10-Lead MSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD7691BRMZ-RL7
- Pin/Package Drawing
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10-Lead MSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD7691SRMZ-EP-RL7
- Pin/Package Drawing
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10-Lead MSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
May 15, 2012
- 10_0006
Halogen Free Material Change for mini SOIC Products
AD7691BRMZ
PRODUCTION
AD7691BRMZ-RL7
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
May 15, 2012
- 10_0006
Halogen Free Material Change for mini SOIC Products
AD7691BRMZ
PRODUCTION
AD7691BRMZ-RL7
PRODUCTION
Software & Part Ecosystem
FPGA/HDL
Device Drivers
Looking for Evaluation Software? You can find it here
| Parts | Product Life Cycle | Description | ||
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Fully Differential Amplifiers1 |
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PRODUCTION |
Low Power, Unity Gain Fully Differential Amplifier & ADC Driver |
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Low Input Bias Current Op Amps (≤100 pA)2 |
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PRODUCTION |
36 V, 19 MHz, Low Noise, Low Bias Current, JFET Op Amp |
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RECOMMENDED FOR NEW DESIGNS |
Low Noise, Precision, Rail-to-Rail Output, JFET Dual Op Amp |
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Low Noise Op Amps (≤ 10nV/√Hz)1 |
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RECOMMENDED FOR NEW DESIGNS |
1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
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Low Power Op Amps (≤ 1mA/amp) 1 |
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PRODUCTION |
2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
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Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C)3 |
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PRODUCTION |
Low Noise, High Speed Amplifier for 16-Bit Systems |
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PRODUCTION |
Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
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PRODUCTION |
Low Noise, Precision CMOS Amplifier |
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Series Voltage References3 |
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PRODUCTION |
Ultralow Noise, LDO XFET® 5.0V Voltage Reference w/Current Sink and Source |
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RECOMMENDED FOR NEW DESIGNS |
Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference |
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PRODUCTION |
Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
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Single-Ended to Differential Amplifiers2 |
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PRODUCTION |
Ultralow Power, Low Distortion ADC Driver |
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PRODUCTION |
Single-Supply, Differential 18-Bit ADC Driver |
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Standard Digital Isolators4 |
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PRODUCTION |
5 kV RMS Quad-Channel Digital Isolators |
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PRODUCTION |
Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability |
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PRODUCTION |
Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality) |
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PRODUCTION |
Quad-Channel Digital Isolator (3/1 Channel Directionality) |
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Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits 2
EVAL-AD7691-PMDZ
18-Bit, 250 kSPS PulSAR® ADC PMOD Evaluation Board
Product Detail
The PMOD-compatible evaluation/prototyping board is a small form factor, low-cost analog-to-digital conversion option. When prototyping, this board is used in conjunction with your favorite MCU or FPGA development board which has the SPI PMOD peripheral connector. Direct electrical and physical connection will enable you to quickly develop software for your system.
This board can also be operated as an evaluation board using the System Demonstration Platform (EVAL-SDP-CB1Z) and an adaptor board (SDP-PMD-IB1Z). When operated with the System Demonstration Platform, a LabView software GUI is provided enabling the user to perform analysis of the ADC's performance.
Resources
EVAL-AD7691
AD7691 Evaluation Kit
Product Detail
Resources
Tools & Simulations 2
Precision ADC Driver Tool
IBIS Model 1
IBIS Model
Reference Designs 1
cn0261
18-Bit, 250 kSPS Data Acquisition System Optimized for AC Performance
Circuits from the lab
Info:Circuits from the lab
