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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD7172-2BRUZ-RL7

Name: AD7172-2BRUZ-RL7
Brand: Analog Devices Inc.
SKU: AD7172-2BRUZ-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7172-2BRUZ-RL7

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: AD7172-2BRUZ-RL7.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 24TSSOP

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Product details

Overview

AD7172-2BRUZ-RL7 from Analog Devices is a low-power, 24-bit sigma-delta ADC with true rail-to-rail analog and reference input buffers, 31.25 kSPS maximum output data rate, ±2 ppm INL, and integrated 2.5 V low-drift (±2 ppm/°C) reference. It supports 2 fully differential or 4 single-ended input channels via a crosspoint multiplexer and operates from −40°C to +105°C in industrial process control and precision instrumentation.

For engineers reviewing the AD7172-2BRUZ-RL7 datasheet, AD7172-2BRUZ-RL7 pinout, AD7172-2BRUZ-RL7 application, or AD7172-2BRUZ-RL7 equivalent, key selection criteria include noise-free resolution (24 bits at 5 SPS), 50/60 Hz rejection (85 dB with 50 ms settling), buffered rail-to-rail input capability, SPI/QSPI/MICROWIRE-compatible interface, and TSSOP-24 package compatibility for high-density PCB layouts.

Technical Context

The AD7172-2BRUZ-RL7 implements a multi-stage sinc5 + sinc1 digital filter architecture enabling simultaneous 50 Hz and 60 Hz rejection at 27.27 SPS, with selectable single-cycle settling mode for fast channel scanning (6.21 kSPS/channel, 161 µs settling). Its crosspoint multiplexer allows per-channel configuration of input type (diff/single), buffer enable, gain, offset, and filter settings via SPI registers.

It integrates dual LDOs (AVDD1 and AVDD2/IOVDD domains), rail-to-rail analog input buffers with ±5 nA input current, buffered reference input buffers, internal temperature sensor (±2°C accuracy), and two GPIOs (GPIO0/GPIO1) referenced to AVDD1/AVSS for synchronous external multiplexer control. Clock sources include internal 2 MHz oscillator (±2.5%), external crystal (16.384 MHz), or external clock (2.048 MHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit no missing codes; enables 16.7 million distinct codes for high dynamic range measurement systems.
Output Data Rate	1.25 SPS to 31.25 kSPS; supports ultra-low-noise DC measurements (e.g., 24 noise-free bits at 5 SPS) and fast multichannel scanning (6.21 kSPS/channel).
INL Error	±2 ppm of FSR; ensures <0.0002% linearity error across full scale, critical for calibration-grade sensor interfaces.
50/60 Hz Rejection	85 dB with 50 ms settling; eliminates mains interference without external notch filters in medical or lab equipment.
Reference Drift	±2 ppm/°C (0°C to 105°C); guarantees stable 2.5 V reference over temperature, reducing system-level calibration frequency.
Supply Current	1.5 mA typical in full operating mode with buffers enabled; enables battery-powered or energy-constrained industrial nodes.
Operating Temp	−40°C to +105°C; qualified for harsh environments including PLC/DCS modules and automotive under-hood sensing.

Pinout & Package

The AD7172-2BRUZ-RL7 is housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin functions are validated per Analog Devices AD7172-2 Rev. A datasheet, Figure 4 and Table 5.

Pin/Terminal	Circuit Role	Design Meaning
AIN0–AIN4	Analog Input Terminals	Five dedicated analog inputs routed through crosspoint multiplexer; AIN0–AIN3 support single-ended use, AIN4 extends channel count in 4-channel single-ended mode.
REF+, REF−	Reference Input Terminals	Differential reference input pins accepting 1 V to AVDD1; support external references or internal 2.5 V REFOUT loopback.
REFOUT	Analog Output	Buffered 2.5 V reference output with ±2 ppm/°C drift; drives external circuitry without loading internal reference.
AVDD1, AVDD2, IOVDD, AVSS, DGND	Power Supply Terminals	Split analog/digital supply domains: AVDD1 (3.0–5.5 V), AVDD2/IOVDD (2–5.5 V), AVSS (−2.75 V to 0 V), DGND (digital ground); enables noise isolation in mixed-signal systems.
SCLK, DIN, DOUT/RDY, CS	Digital Interface Pins	SPI-compatible 3-/4-wire serial interface with Schmitt-triggered SCLK; DOUT/RDY serves dual role as data output and conversion-ready interrupt signal.
XTAL1, XTAL2/CLKIO	Clock Interface	Crystal oscillator inputs or external clock I/O; supports 16.384 MHz crystal or 2.048 MHz external clock for precise timing synchronization.
GPIO0, GPIO1, SYNC/ERROR	Configurable I/O	Two AVDD1-referenced GPIOs and multifunction SYNC/ERROR pin for daisy-chained ADC synchronization or system error signaling.

Key Features

Feature	Design Value
True rail-to-rail analog input buffers	Enables direct connection of sensors with output swings from AVSS to AVDD1 without external op-amps or level-shifting.
Per-channel configuration via SPI	Allows independent setup of filter type, gain, offset, buffer enable, and input type for each of up to 4 channels-reducing firmware complexity in multichannel systems.
Integrated 2.5 V reference with ±2 ppm/°C drift	Eliminates need for external precision reference ICs and associated decoupling, saving BOM cost and board space in portable instrumentation.
Sinc5 + Sinc1 digital filter with 50/60 Hz rejection	Provides simultaneous mains-frequency rejection at programmable ODRs without sacrificing throughput-critical for ECG, chromatography, and weigh-scale designs.
Channel scan rate of 6.21 kSPS/channel	Delivers fully settled data every 161 µs across 4 channels, enabling real-time monitoring of fast-changing industrial process variables.
Low power: 1.5 mA at 31.25 kSPS	Supports continuous high-resolution acquisition in thermally constrained enclosures or battery-backed data loggers with >1-year runtime.

Applications

Process Control Sensor Hub	Medical Multichannel Monitor
Use Scenario: Simultaneous acquisition of temperature, pressure, flow, and pH signals in PLC/DCS I/O modules. IC Role / Device Role / Timing Role: Primary high-precision ADC managing up to 4 sensor inputs with per-channel filtering and calibration. Use Value: 24 noise-free bits at 5 SPS and ±2 ppm INL ensure traceable metrology-grade readings compliant with IEC 61000-4-30 Class A power quality standards.	Use Scenario: High-fidelity analog front-end for patient monitors acquiring ECG, SpO₂, NIBP, and temperature. IC Role / Device Role / Timing Role: Central sigma-delta converter with synchronized channel scanning and 85 dB 50/60 Hz rejection for clean biopotential signals. Use Value: Integrated rail-to-rail buffers accept direct electrode outputs; internal reference stability minimizes recalibration during extended clinical sessions.
Lab Chromatography Detector	Scientific Data Acquisition System
Use Scenario: Signal digitization from photodiode or electrochemical detectors in HPLC/GC systems requiring sub-microvolt resolution. IC Role / Device Role / Timing Role: Low-noise ADC with 24-bit resolution and 1.25 SPS–31.25 kSPS programmability for peak integration and baseline stability. Use Value: 17.2 noise-free bits at 31.25 kSPS enables accurate peak height/area quantification even at high chromatographic scan rates.	Use Scenario: Modular DAQ chassis digitizing multiple sensor types (strain gauge, RTD, thermocouple) in research labs. IC Role / Device Role / Timing Role: Configurable ADC node supporting both differential and single-ended inputs with on-chip gain/offset correction. Use Value: Crosspoint multiplexer and per-channel register mapping simplify firmware development for heterogeneous sensor mixes without hardware rework.

Process Control Sensor Hub

Medical Multichannel Monitor

Use Scenario: Simultaneous acquisition of temperature, pressure, flow, and pH signals in PLC/DCS I/O modules.

IC Role / Device Role / Timing Role: Primary high-precision ADC managing up to 4 sensor inputs with per-channel filtering and calibration.

Use Value: 24 noise-free bits at 5 SPS and ±2 ppm INL ensure traceable metrology-grade readings compliant with IEC 61000-4-30 Class A power quality standards.

Use Scenario: High-fidelity analog front-end for patient monitors acquiring ECG, SpO₂, NIBP, and temperature.

IC Role / Device Role / Timing Role: Central sigma-delta converter with synchronized channel scanning and 85 dB 50/60 Hz rejection for clean biopotential signals.

Use Value: Integrated rail-to-rail buffers accept direct electrode outputs; internal reference stability minimizes recalibration during extended clinical sessions.

Lab Chromatography Detector

Scientific Data Acquisition System

Use Scenario: Signal digitization from photodiode or electrochemical detectors in HPLC/GC systems requiring sub-microvolt resolution.

IC Role / Device Role / Timing Role: Low-noise ADC with 24-bit resolution and 1.25 SPS–31.25 kSPS programmability for peak integration and baseline stability.

Use Value: 17.2 noise-free bits at 31.25 kSPS enables accurate peak height/area quantification even at high chromatographic scan rates.

Use Scenario: Modular DAQ chassis digitizing multiple sensor types (strain gauge, RTD, thermocouple) in research labs.

IC Role / Device Role / Timing Role: Configurable ADC node supporting both differential and single-ended inputs with on-chip gain/offset correction.

Use Value: Crosspoint multiplexer and per-channel register mapping simplify firmware development for heterogeneous sensor mixes without hardware rework.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision sigma-delta ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7173-8BRUZ	8-channel variant with identical 24-bit resolution, 31.25 kSPS max ODR, and ±2 ppm INL but larger 32-lead LFCSP package and higher 2.5 mA supply current.	Targets systems requiring >4 analog inputs without external multiplexing; less suitable for space-constrained TSSOP layouts.	Select AD7173-8BRUZ only when channel count exceeds four and PCB area permits LFCSP footprint.
ADS1262IPBSR	Texas Instruments part with 24-bit resolution, 38 kSPS max ODR, ±4 ppm INL, integrated PGA (1–128×), and separate AVDD/DVDD supplies-but lacks true rail-to-rail input buffers and internal 2.5 V reference.	Better suited for low-level mV-range sensor signals needing programmable gain; requires external reference and buffer amplifiers for rail-to-rail operation.	Choose ADS1262IPBSR when PGA functionality is mandatory and system design accommodates external reference/buffer components.

Compared with AD7172-2BRUZ-RL7, AD7173-8BRUZ offers more channels at the cost of higher power and larger footprint, while ADS1262IPBSR provides integrated gain but demands additional external components to match the AD7172-2BRUZ-RL7's self-contained buffered reference and input architecture.

Availability

AD7172-2BRUZ-RL7 is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and scientific data acquisition requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD7172-2BRUZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with engineering centers worldwide.

The AD7172-2BRUZ-RL7 belongs to Analog Devices' precision sigma-delta ADC product line, engineered for high-resolution, low-noise, low-power measurement in industrial, medical, and scientific instrumentation where accuracy, stability, and integration are critical.

FAQ

What is the maximum output data rate of the AD7172-2BRUZ-RL7?

The AD7172-2BRUZ-RL7 supports a maximum output data rate of 31.25 kSPS. This rate applies in single-channel mode with sinc3 filter configuration. At this speed, it delivers 17.2 noise-free bits. For multichannel scanning, the device achieves 6.21 kSPS per channel with full settling in 161 µs, making AD7172-2BRUZ-RL7 suitable for high-throughput precision applications such as chromatography detectors and fast-loop industrial controllers.

Does the AD7172-2BRUZ-RL7 include an internal voltage reference?

Yes, the AD7172-2BRUZ-RL7 integrates a precision 2.5 V band gap reference with ±2 ppm/°C drift over 0°C to 105°C and ±3 ppm/°C over −40°C to +105°C. The buffered REFOUT pin delivers this reference with low output impedance, enabling direct connection to external circuits without degradation. This eliminates the need for external reference ICs in most applications, simplifying design and improving system-level accuracy for AD7172-2BRUZ-RL7-based measurement systems.

Can the AD7172-2BRUZ-RL7 operate with true rail-to-rail analog inputs?

Yes, the AD7172-2BRUZ-RL7 features true rail-to-rail analog input buffers that accept signals from AVSS to AVDD1 when enabled. With buffers active, input common-mode range spans the full supply, allowing direct interfacing with sensors, transducers, or DACs whose outputs swing to the rails-without external level-shifting circuitry. This capability is confirmed in the AD7172-2BRUZ-RL7 datasheet General Description and Analog Inputs section, and reduces signal chain complexity in AD7172-2BRUZ-RL7 implementations.

What digital interface protocols does the AD7172-2BRUZ-RL7 support?

The AD7172-2BRUZ-RL7 supports standard 3- or 4-wire SPI-compatible serial communication with Schmitt-triggered SCLK for noise immunity. It is explicitly compatible with QSPI, MICROWIRE, and DSP-style interfaces. The DOUT/RDY pin functions as both serial data output and conversion-ready indicator, enabling interrupt-driven firmware architectures. All register access-including per-channel configuration, filter selection, and GPIO control-is performed via this interface, as documented for AD7172-2BRUZ-RL7 in the Digital Interface section of its datasheet.

What is the operating temperature range for the AD7172-2BRUZ-RL7?

The AD7172-2BRUZ-RL7 is specified for operation from −40°C to +105°C ambient temperature. This extended industrial temperature range is validated across all key performance parameters-including INL, noise, reference drift, and power consumption-and makes AD7172-2BRUZ-RL7 appropriate for deployment in demanding environments such as factory-floor PLC modules, downhole oilfield sensors, and automotive cabin air quality monitors.

AD7172-2BRUZ-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 24

Sampling Rate (Per Second):: 31.25k

Number of Inputs:: 2, 4

Input Type:: Differential, Single Ended

Data Interface:: SPI, DSP

Configuration:: MUX-ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: External, Internal

Voltage - Supply, Analog:: 2V ~ 5.5V

Voltage - Supply, Digital:: 2V ~ 5.5V

Features:: -

Operating Temperature:: -40°C ~ 105°C

Supplier Device Package:: 24-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7172-2BRUZ-RL7 FAQ

1.How can I place an order for AD7172-2BRUZ-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7172-2BRUZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD7172-2BRUZ-RL7 reliable?

The price and inventory of AD7172-2BRUZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7172-2BRUZ-RL7 is usually 5 days.

3.What payment methods are accepted for AD7172-2BRUZ-RL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7172-2BRUZ-RL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD7172-2BRUZ-RL7?

AD7172-2BRUZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7172-2BRUZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD7172-2BRUZ-RL7?

For technical support, including AD7172-2BRUZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7172-2BRUZ-RL7 requirements.

6.How does Aetrix verify that AD7172-2BRUZ-RL7 is sourced from the original manufacturer or authorized distributors?

All AD7172-2BRUZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7172-2BRUZ-RL7 meets industry standards.

7.What is the process for return or replacement of AD7172-2BRUZ-RL7?

All AD7172-2BRUZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7172-2BRUZ-RL7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD7172-2BRUZ-RL7 part is unused and in its original packaging.

Return procedure for AD7172-2BRUZ-RL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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