AD7175-2

RECOMMENDED FOR NEW DESIGNS

24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers

Data Sheet (Rev. B) Product Selection Table

Part Models: 3
1ku List Price: Starting From $13.95

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Overview

Fast and flexible output rate: 5 SPS to 250 kSPS
Channel scan data rate of 50 kSPS/channel (20 µs settling)
Performance specifications
- 17.2 noise free bits at 250 kSPS
- 20 noise free bits at 2.5 kSPS
- 24 noise free bits at 20 SPS
- INL: ±1 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
Power supply: AVDD1 = 5 V, AVDD2 = IOVDD = 2 V to 5 V
- Split supply with AVDD1/AVSS at ±2.5 V
ADC current: 8.4 mA
Temperature range: −40°C to +105°C
3- or 4-wire serial digital interface (Schmitt trigger on SCLK)
- Serial port interface (SPI), QSPI, MICROWIRE, and DSP compatible

The AD7175-2 is a low noise, fast settling, multiplexed, 2-/4- channel (fully/pseudo differential) Σ-Δ analog-to-digital converter (ADC) for low bandwidth inputs. It has a maximum channel scan rate of 50 kSPS (20 µs) for fully settled data. The output data rates range from 5 SPS to 250 kSPS.

The AD7175-2 integrates key analog and digital signal conditioning blocks to allow users to configure an individual setup for each analog input channel in use. Each feature can be user selected on a per channel basis. 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 output reference buffer) adds embedded functionality to reduce external component count.

The digital filter allows simultaneous 50 Hz/60 Hz rejection at 27.27 SPS output data rate. The user can switch between different filter options according to the demands of each channel in the application. The ADC automatically switches through each selected channel. Further digital processing functions include offset and gain calibration registers, configurable on a per channel basis.

The device operates with a 5 V AVDD1, or ±2.5 V AVDD1/AVSS, and 2 V to 5 V AVDD2 and IOVDD supplies. The specified operating temperature range is −40°C to +105°C. The AD7175-2 is in a 24-lead TSSOP package.

Applications

Process control: PLC/DCS modules
Temperature and pressure measurement
Medical and scientific multichannel instrumentation
Chromatography

Part Models: 3
1ku List Price: Starting From $13.95

Documentation

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
AD7175-2BRUZ	24-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD7175-2BRUZ-RL	24-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD7175-2BRUZ-RL7	24-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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
		PCN16_0009_Form Material_Report
AD7175-2BRUZ	PRODUCTION
AD7175-2BRUZ-RL	PRODUCTION
AD7175-2BRUZ-RL7	PRODUCTION
Jul 23, 2014 - 13_0241 Qualification of ASE Chungli as an Alternate Assembly Site for Select 16L, 20L and 24L TSSOP Packages
		PCN13_0241_Form Material_Report Detailed Change Description Qualification Results Summary Qualification Results Summary
AD7175-2BRUZ	PRODUCTION
AD7175-2BRUZ-RL	PRODUCTION
AD7175-2BRUZ-RL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 6

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Hardware Ecosystem

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Modify Design LTspice Simulation
High Voltage, Ultralow Noise, Zero Drift, Rail to Rail Output Amplifier

Modify Design LTspice Simulation
Robust, 4-Channel, Data Acquisition System for Industrial Level Signals

Modify Design LTspice Simulation

Parts	Product Life Cycle	Description
Analog Switches & Multiplexers 2
ADG1409	PRODUCTION	4 Ω R_on, 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
Charge Pumps 1
ADM660	PRODUCTION	CMOS Switched-Capacitor Voltage Converter
Interface Transceivers & Isolators 4
ADUM3401	PRODUCTION	Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability

ADUM3481	PRODUCTION	Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality)
ADUM1401	PRODUCTION	Quad-Channel Digital Isolator (3/1 Channel Directionality)
ADUM4401	PRODUCTION	5 kV RMS Quad-Channel Digital Isolators
LDO Linear Regulators 2
ADP7118	RECOMMENDED FOR NEW DESIGNS	20 V, 200 mA, Low Noise, CMOS LDO Linear Regulator
ADP7182	RECOMMENDED FOR NEW DESIGNS	–28 V, −200 mA, Low Noise, Linear Regulator
Operational Amplifiers (Op Amps) 2
ADA4528-2	RECOMMENDED FOR NEW DESIGNS	Precision, Ultralow Noise, RRIO, Zero-Drift Dual Op Amp
ADA4522-2	RECOMMENDED FOR NEW DESIGNS	Dual 55V, EMI Enhanced, Zero Drift, Ultralow Noise, Rail-to-Rail Output Operational Amplifiers
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

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.

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IBIS Model 1

AD7175-2 IBIS Model

Design Tool 1

AD7175-2 Digital Filter Frequency Response Model

Signal Chain Designer

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.

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