AD7172-2
RECOMMENDED FOR NEW DESIGNSLow Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers
- Part Models
- 3
- 1ku List Price
- Starting From $8.15
Part Details
- Fast and flexible output rate: 1.25 SPS to 31.25 kSPS
- Channel scan data rate of 6.21 kSPS/channel (161 µs settling)
- Performance specifications
- 17.2 noise free bits at 31.25 kSPS
- 24 noise free bits at 5 SPS
- INL: ±2 ppm of FSR
- 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
- User configurable input channels
- 2 fully differential channels or 4 single-ended channels
- Crosspoint multiplexer
- On-chip 2.5 V reference (±2 ppm/°C drift)
- True rail-to-rail analog and reference input buffers
- Internal or external clock
- See data sheet for additional features
TThe AD7172-2 is an intelligent, low noise, low power, multiplexed, Σ-Δ analog-to-digital converter (ADC) with 2- or 4-channel (fully differential/single-ended) inputs for low bandwidth signals. The AD7172-2 has a maximum channel scan rate of 6.21 kSPS (161 µs) for fully settled data. The output data rates range from 1.25 SPS to 31.25 kSPS.
The AD7172-2 integrates key analog and digital signal conditioning blocks to allow users to configure an individual setup for each analog input channel in use via the SPI. Integrated true rail-to-rail buffers on the analog inputs and external reference inputs provide easy to drive high impedance inputs. The precision 2.5 V low drift (2 ppm/°C) band gap internal reference (with an output reference buffer) adds embedded functionality to reduce the external component count.
The digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. The user can switch between different filter options according to the demands of each channel in the application, with further digital processing functions such as offset and gain calibration registers, which are also configurable on a per channel basis. General-purpose inputs/outputs (GPIOs) control external multiplexers synchronous to the ADC conversion timing.
The specified operating temperature range is −40°C to +105°C. The AD7172-2 is in a 24-lead TSSOP package.
Applications
- Process control: PLC/DCS modules
- Temperature and pressure measurement - Medical and scientific multichannel instrumentation
- Chromatography
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 2
Informational 1
Video 7
Circuit Note 3
Tutorial 2
Device Drivers 4
Technical Book 1
Analog Dialogue 2
Webcast 2
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 |
|---|---|---|---|
| AD7172-2BRUZ | 24-Lead TSSOP | ||
| AD7172-2BRUZ-RL | 24-Lead TSSOP | ||
| AD7172-2BRUZ-RL7 | 24-Lead TSSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 16, 2016 - 16_0009 Change of MSL Rating for AD7172-2, AD7175-2, AD7176-2 & AD7177-2 TSSOP Devices |
||
| AD7172-2BRUZ | PRODUCTION | |
| AD7172-2BRUZ-RL | PRODUCTION | |
| AD7172-2BRUZ-RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Mbed Support 5
Device Drivers 4
Evaluation Software 1
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Dual-Supply Analog Switches and Multiplexers 2 | ||
| ADG1409 | PRODUCTION | 4 Ω Ron, 4-Channel ±15 V/+12 V/±5 V iCMOS Multiplexer |
| ADG1404 | PRODUCTION | 1.8 Ω Maximum On Resistance, ±15 V/12 V/±5 V, 4:1, iCMOS Multiplexer |
| Low Power Op Amps (≤ 1mA/amp) 1 | ||
| ADA4522-2 | RECOMMENDED FOR NEW DESIGNS | Dual 55V, EMI Enhanced, Zero Drift, Ultralow Noise, Rail-to-Rail Output Operational Amplifiers |
| Negative Linear Regulators (LDO) 1 | ||
| ADP7182 | RECOMMENDED FOR NEW DESIGNS | –28 V, −200 mA, Low Noise, Linear Regulator |
| Positive Linear Regulators (LDO) 1 | ||
| ADP7118 | RECOMMENDED FOR NEW DESIGNS | 20 V, 200 mA, Low Noise, CMOS LDO Linear Regulator |
| Series Voltage References 2 | ||
| ADR445 | PRODUCTION | Ultralow Noise, LDO XFET® 5.0V Voltage Reference w/Current Sink and Source |
| ADR4550 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference |
| Standard Digital Isolators 4 | ||
| ADUM3401 | PRODUCTION | Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability |
| ADUM1401 | PRODUCTION | Quad-Channel Digital Isolator (3/1 Channel Directionality) |
| ADUM3481 | PRODUCTION | Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality) |
| ADUM4401 | PRODUCTION |
5 kV RMS Quad-Channel Digital Isolators |
| Unregulated Doubling/Inverting Charge Pumps 1 | ||
| ADM660 | PRODUCTION | CMOS Switched-Capacitor Voltage Converter |
| Zero-Drift Op Amps 1 | ||
| ADA4528-2 | RECOMMENDED FOR NEW DESIGNS | Precision, Ultralow Noise, RRIO, Zero-Drift Dual Op Amp |
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD7177-2 | RECOMMENDED FOR NEW DESIGNS | 32-Bit, 10 kSPS, Sigma-Delta ADC with 100 µs Settling and 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 |
| AD7176-2 | RECOMMENDED FOR NEW DESIGNS | 24-Bit, 250 kSPS Sigma Delta ADC with 20 µs Settling |
| AD7173-8 | RECOMMENDED FOR NEW DESIGNS |
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC |
| AD7172-4 | RECOMMENDED FOR NEW DESIGNS | Low Power, with 4- or 8-channel, 24-bit, 31.25 kSPS, Sigma-Delta ADC with 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
Signal Chain Designer - BETA
Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.
Open ToolIBIS Model 1
Evaluation Kits
AD7172-2 Evaluation Board
Resources
Software
Reference Designs
PLC/DCS Quad Channel Voltage and Current Input with HART Compatibility
Part Used
Design & Integration Tools
Ultrahigh Sensitivity Femtoampere Measurement Platform
Part Used
Design & Integration Tools
Videos
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sample_iTunes
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Valeria
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AnalogDevices-F04