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

Analog Devices Inc. AD7172-2BRUZ-RL

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

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Part No.:: AD7172-2BRUZ-RL

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

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

Datasheet:: AD7172-2BRUZ-RL.pdf

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

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Product details

Overview

AD7172-2BRUZ-RL 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-designed for high-precision multichannel industrial measurement in PLC/DCS modules.

For engineers reviewing the AD7172-2BRUZ-RL datasheet, AD7172-2BRUZ-RL pinout, AD7172-2BRUZ-RL application, or AD7172-2BRUZ-RL equivalent, key selection criteria include noise-free resolution at multiple ODRs (24 bits @ 5 SPS, 17.2 bits @ 31.25 kSPS), flexible channel configuration (2 differential or 4 single-ended), simultaneous 50/60 Hz rejection, and SPI/QSPI/MICROWIRE-compatible serial interface with Schmitt-triggered SCLK.

Technical Context

The AD7172-2BRUZ-RL implements a programmable sinc5 + sinc1 digital filter architecture enabling single-cycle settling (161 µs) at 6.21 kSPS/channel scan rate and configurable per-channel offset/gain calibration registers. Its crosspoint multiplexer supports dynamic reconfiguration of analog inputs without external switching hardware.

True rail-to-rail input buffers accept signals from AVSS to AVDD1 while maintaining ±5 nA input bias current and <−120 dB crosstalk at 1 kHz; the buffered internal 2.5 V reference delivers 4.5 µV_RMS (0.1–10 Hz) noise and 200 µs turn-on settling with 100 nF load.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit no missing codes; guarantees monotonicity across full temperature range (−40°C to +105°C).
Output Data Rate	1.25 SPS to 31.25 kSPS; enables trade-off between noise performance and throughput in real-time systems.
Noise-Free Bits	24 at 5 SPS (19.6 µV_PP), 17.2 at 31.25 kSPS-directly determines effective resolution for sensor signal conditioning.
INL Error	±2 ppm of FSR max; ensures sub-LSB linearity error over full scale for precision metrology applications.
Reference Drift	±2 ppm/°C (0°C to 105°C); eliminates need for frequent recalibration in temperature-varying environments.
Power Consumption	1.5 mA total ADC current (AVDD1 + AVDD2 + IOVDD) at full operation with buffers enabled-enables low-power portable instrumentation.
Digital Interface	SPI/QSPI/MICROWIRE/DSP-compatible 3- or 4-wire serial port with Schmitt-triggered SCLK-supports robust communication in noisy industrial settings.

Pinout & Package

The AD7172-2BRUZ-RL is housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch) with exposed pad for thermal enhancement and specified θ_JA = 81°C/W on 2-layer JEDEC board.

Pin/Terminal	Circuit Role	Design Meaning
AIN0–AIN4	Analog Input Terminals	Five dedicated analog inputs routed via crosspoint multiplexer; support 2 fully differential or 4 single-ended channels with rail-to-rail buffering.
REF+, REF−	Reference Input Terminals	Accept external reference from 1 V to AVDD1; enable buffered reference input for improved PSRR and CMRR (>95 dB).
REFOUT	Buffered Internal Reference Output	2.5 V ±0.12% output with 4.5 µV_RMS (0.1–10 Hz) noise; drives external circuitry without additional buffer amplifier.
DIN, DOUT/RDY, SCLK, CS	Serial Interface Signals	Standard SPI-compatible interface with dual-function DOUT/RDY (data ready interrupt) and Schmitt-triggered SCLK for noise immunity.
GPIO0, GPIO1	General-Purpose I/O	AVDD1/AVSS-referenced outputs for synchronous control of external analog multiplexers or status indication.
SYNC/ERROR	Multi-Function Digital Pin	Configurable as synchronization input for multi-ADC timing alignment, open-drain error output, or general-purpose output.
XTAL1, XTAL2/CLKIO	Clock Source Interface	Supports internal oscillator (2 MHz), external crystal (14–16.384 MHz), or external clock (2–2.048 MHz) with automatic detection and startup.

Key Features

Feature	Design Value
Per-Channel Configuration	Independent setup of filter type, gain, offset, and input channel mapping for each of up to 4 analog inputs-eliminates firmware overhead in multichannel scanning.
Simultaneous 50/60 Hz Rejection	85 dB rejection at 27.27 SPS with enhanced digital filter; meets IEC 61000-4-7 compliance for power quality analyzers without external notch filters.
Rail-to-Rail Input Buffers	Input voltage range AVSS to AVDD1 with ±5 nA bias current-enables direct connection to high-impedance sensors (e.g., RTDs, thermocouples) without level-shifting.
Integrated Temperature Sensor	±2°C accuracy after user calibration at 25°C with 477 µV/K sensitivity-provides on-chip thermal monitoring for system diagnostics and drift compensation.
Low-Power Operating Modes	Standby mode draws 420 µA (reference on), power-down mode consumes only 1–10 µA-extends battery life in portable data loggers.

Applications

Process Control Instrumentation	Medical Multichannel Monitoring
Use Scenario: High-density analog input modules in PLC/DCS systems acquiring temperature, pressure, and flow sensor signals across 16+ channels. IC Role / Device Role / Timing Role: Primary precision ADC with integrated crosspoint mux and per-channel calibration-reduces external component count and PCB area by 30% vs discrete solutions. Use Value: 6.21 kSPS channel scan rate with 161 µs settling enables full-system update within 2.5 ms, meeting real-time loop timing requirements.	Use Scenario: Portable patient monitors measuring ECG, SpO₂, and respiration simultaneously with >100 dB SNR. IC Role / Device Role / Timing Role: Central sigma-delta converter with true rail-to-rail buffers accepting direct connection from electrode interfaces and isolated amplifiers. Use Value: 24 noise-free bits at 5 SPS provides 19.6 µV_PP resolution-detects microvolt-level biopotentials without external amplification stages.
Chromatography Systems	Scientific Data Acquisition
Use Scenario: Lab-grade gas chromatographs requiring stable baseline and low drift during 30-minute peak integration windows. IC Role / Device Role / Timing Role: Precision front-end ADC with ±2 ppm/°C reference drift and 85 dB 50/60 Hz rejection-minimizes baseline wander from AC mains coupling. Use Value: Integrated 2.5 V reference eliminates external reference IC, reducing BOM cost and long-term drift uncertainty by 50%.	Use Scenario: Environmental sensor arrays deployed in remote locations logging temperature, humidity, and air quality over months. IC Role / Device Role / Timing Role: Low-power ADC operating in standby mode (420 µA) between measurements, waking on timer interrupt to capture synchronized multi-sensor samples. Use Value: 1.5 mA active current and 1–10 µA power-down current extend AA battery life to >2 years in duty-cycled deployments.

Process Control Instrumentation

Medical Multichannel Monitoring

Use Scenario: High-density analog input modules in PLC/DCS systems acquiring temperature, pressure, and flow sensor signals across 16+ channels.

IC Role / Device Role / Timing Role: Primary precision ADC with integrated crosspoint mux and per-channel calibration-reduces external component count and PCB area by 30% vs discrete solutions.

Use Value: 6.21 kSPS channel scan rate with 161 µs settling enables full-system update within 2.5 ms, meeting real-time loop timing requirements.

Use Scenario: Portable patient monitors measuring ECG, SpO₂, and respiration simultaneously with >100 dB SNR.

IC Role / Device Role / Timing Role: Central sigma-delta converter with true rail-to-rail buffers accepting direct connection from electrode interfaces and isolated amplifiers.

Use Value: 24 noise-free bits at 5 SPS provides 19.6 µV_PP resolution-detects microvolt-level biopotentials without external amplification stages.

Chromatography Systems

Scientific Data Acquisition

Use Scenario: Lab-grade gas chromatographs requiring stable baseline and low drift during 30-minute peak integration windows.

IC Role / Device Role / Timing Role: Precision front-end ADC with ±2 ppm/°C reference drift and 85 dB 50/60 Hz rejection-minimizes baseline wander from AC mains coupling.

Use Value: Integrated 2.5 V reference eliminates external reference IC, reducing BOM cost and long-term drift uncertainty by 50%.

Use Scenario: Environmental sensor arrays deployed in remote locations logging temperature, humidity, and air quality over months.

IC Role / Device Role / Timing Role: Low-power ADC operating in standby mode (420 µA) between measurements, waking on timer interrupt to capture synchronized multi-sensor samples.

Use Value: 1.5 mA active current and 1–10 µA power-down current extend AA battery life to >2 years in duty-cycled deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7173-8BRUZ	8-channel version with identical 24-bit resolution, 31.25 kSPS ODR, and ±2 ppm INL-but requires larger 32-lead LFCSP package and higher 2.2 mA supply current.	Designed for higher channel density where space permits; lacks GPIO0/GPIO1 pins but adds two extra AIN terminals.	Select when expanding from 4 to 8 analog inputs without redesigning signal chain architecture.
LTC2499CGN#PBF	24-bit delta-sigma ADC with 15 ppm INL, 120 dB 50/60 Hz rejection, and integrated PGA-but no internal reference, no crosspoint mux, and 1.8 V to 5.25 V supply range.	Targeted at ultra-low-noise DC measurements (e.g., weigh scales) rather than multichannel industrial scanning.	Choose when absolute lowest input-referred noise (<100 nV_RMS) is prioritized over channel flexibility and integrated reference.

Compared with AD7172-2BRUZ-RL, AD7173-8BRUZ offers higher channel count at the cost of increased power and footprint, while LTC2499CGN#PBF trades integrated features for superior noise performance in single-channel DC applications-making AD7172-2BRUZ-RL optimal for balanced multichannel precision with minimal external components.

Availability

AD7172-2BRUZ-RL is available at Aetrix Electronics and suitable for process control instrumentation, medical multichannel monitoring, and scientific data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7172-2BRUZ-RL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7172-2BRUZ-RL belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for high-accuracy, low-power, multichannel measurement in harsh industrial environments with wide temperature range and stringent EMC requirements.

FAQ

What is the maximum channel scan rate supported by the AD7172-2BRUZ-RL?

The AD7172-2BRUZ-RL achieves a maximum channel scan rate of 6.21 kSPS per channel with 161 µs settling time for fully settled data. This performance is enabled by its sinc5 + sinc1 digital filter architecture and crosspoint multiplexer, allowing rapid reconfiguration between up to four single-ended or two differential input channels without external hardware changes. The AD7172-2BRUZ-RL maintains this scan rate across its full −40°C to +105°C operating temperature range.

Does the AD7172-2BRUZ-RL require an external reference, or does it include an internal one?

The AD7172-2BRUZ-RL integrates a precision 2.5 V band gap reference with ±2 ppm/°C drift (0°C to 105°C) and 4.5 µV_RMS (0.1–10 Hz) noise, accessible via the REFOUT pin. It also supports external references from 1 V to AVDD1 applied between REF+ and REF−. The AD7172-2BRUZ-RL's buffered reference inputs provide >95 dB common-mode rejection and eliminate the need for external op-amps when using external references.

How does the AD7172-2BRUZ-RL handle 50 Hz and 60 Hz interference rejection?

The AD7172-2BRUZ-RL delivers simultaneous 50 Hz and 60 Hz rejection of ≥85 dB at 27.27 SPS using its enhanced digital filter mode, which is optimized for power-line frequency interference suppression. This capability is achieved without external notch filters or additional firmware processing. The AD7172-2BRUZ-RL also provides 120 dB rejection at 50/60 Hz under specific conditions (20 SPS ODR, internal clock), meeting IEC 61000-4-7 requirements for power quality instrumentation.

Can the AD7172-2BRUZ-RL operate with split analog supplies?

Yes, the AD7172-2BRUZ-RL supports split analog supplies: AVDD1 and AVSS can be configured at ±2.5 V or ±1.65 V, enabling bipolar input signal acquisition without level-shifting circuitry. In this mode, the rail-to-rail analog input buffers accept signals from AVSS to AVDD1, preserving full dynamic range. The AD7172-2BRUZ-RL maintains all specified performance-including ±2 ppm INL and 24-bit no-missing-codes-under split-supply operation across −40°C to +105°C.

What digital interface protocols are compatible with the AD7172-2BRUZ-RL?

The AD7172-2BRUZ-RL supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces using its DIN, DOUT/RDY, SCLK, and CS pins. Its Schmitt-triggered SCLK input enhances noise immunity in electrically noisy industrial environments, and the DOUT/RDY pin functions both as a data-ready interrupt and serial data output. The AD7172-2BRUZ-RL operates in 3-wire mode (CS hardwired low) or standard 4-wire mode, with configurable clock polarity and phase to match host controller requirements.

AD7172-2BRUZ-RL 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-RL FAQ

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

Please submit a Request for Quotation (RFQ) for AD7172-2BRUZ-RL 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-RL reliable?

The price and inventory of AD7172-2BRUZ-RL 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-RL is usually 5 days.

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your AD7172-2BRUZ-RL 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-RL?

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

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

All AD7172-2BRUZ-RL 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-RL meets industry standards.

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

All AD7172-2BRUZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD7172-2BRUZ-RL, 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-RL part is unused and in its original packaging.

Return procedure for AD7172-2BRUZ-RL:

1.Submit a request within 90 days.

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

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