AD7191
PRODUCTIONPin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors
- Part Models
- 2
- 1ku List Price
- Starting From $5.02
Part Details
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The AD7191 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) ADC. The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC. It contains two differential analog inputs. The part also includes a temperature sensor that can be used for temperature compensation.
For ease-of-use, all the features of the AD7191 are controlled by dedicated pins. The on-chip PGA has a gain of 1, 8, 64, or 128, supporting a full-scale differential input of ±5 V, ±625 mV, ±78 mV, or ±39 mV. The output data rate can be programmed to 10 Hz, 50 Hz, 60 Hz, or 120 Hz. Simultaneous 50 Hz and 60 Hz rejection is obtained when the output data rate is set to 10 Hz or 50 Hz; 60 Hz only rejection is obtained when the output data rate is set to 60 Hz. The AD7191 can be operated with the internal clock, or an external clock can be used.
The part operates with a power supply of 3 V to 5.25 V. It consumes a current of 4.35 mA. It is available in a 24-lead TSSOP package.
Applications
- Weigh scales
- Strain gauge transducers
- Pressure measurement
- Medical and scientific instrumentation
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 1
Frequently Asked Question 1
Video 3
Circuit Note 1
Tutorial 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 |
|---|---|---|---|
| AD7191BRUZ | 24-Lead TSSOP | ||
| AD7191BRUZ-REEL | 24-Lead TSSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2012 - 11_0218 Halogen Free Material Change for Certain TSSOP Products at Carsem |
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| AD7191BRUZ | PRODUCTION | |
| AD7191BRUZ-REEL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| isoPower 1 | ||
| ADUM3470 | PRODUCTION | Isolated Switching Regulators (4/0 Channel Directionality) |
| Low Input Bias Current Op Amps (≤100 pA) 2 | ||
| ADA4051-2 | PRODUCTION | 1.8V, µPower, Zero-Drift, RRIO Dual Amplifier |
| AD8639 | PRODUCTION | 16V Dual Auto-Zero, Rail-to-Rail Output, Precision Amplifier |
| Positive Linear Regulators (LDO) 1 | ||
| ADP3303 | NOT RECOMMENDED FOR NEW DESIGNS | High Accuracy anyCAP™ 200 mA Low Dropout Linear Regulator |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 1 | ||
| AD8539 | PRODUCTION | Low Power, Precision, Auto-Zero Op Amp |
| Series Voltage References 2 | ||
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD7172-2 | RECOMMENDED FOR NEW DESIGNS | Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers |
| AD7175-2 | RECOMMENDED FOR NEW DESIGNS | 24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers |
| AD7177-2 | RECOMMENDED FOR NEW DESIGNS | 32-Bit, 10 kSPS, Sigma-Delta ADC with 100 µs Settling and True Rail-to-Rail Buffers |
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
Open ToolDesign Tool 1
Evaluation Kits
AD7191 Evaluation Board