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

Analog Devices Inc. AD7177-2BRUZ

Name: AD7177-2BRUZ
Brand: Analog Devices Inc.
SKU: AD7177-2BRUZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7177-2BRUZ

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

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

Datasheet:: AD7177-2BRUZ.pdf

Description:: IC ADC 32BIT SIGMA-DELTA 24TSSOP

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Product details

Overview

AD7177-2BRUZ from Analog Devices is a 32-bit sigma-delta analog-to-digital converter (ADC) designed for high-precision, low-bandwidth industrial measurement systems. It delivers 10 kSPS channel scan rate with 100 µs settling, ±1 ppm INL accuracy, true rail-to-rail buffered analog inputs, and integrated 2.5 V reference (±2 ppm/°C drift), enabling direct connection to high-impedance sensors in PLC/DCS modules.

For engineers reviewing the AD7177-2BRUZ datasheet, AD7177-2BRUZ pinout, AD7177-2BRUZ application, or AD7177-2BRUZ equivalent, key selection criteria include noise-free resolution (19.1 bits @ 10 kSPS), flexible input configuration (2 differential or 4 single-ended channels), simultaneous 50/60 Hz rejection, and support for split (±2.5 V) or single (5 V) AVDD1 supply operation.

Technical Context

The AD7177-2BRUZ employs a sinc5 + sinc1 digital filter architecture enabling single-cycle settling at 10 kSPS per channel and configurable enhanced 50 Hz/60 Hz rejection at 27.27 SPS. Its crosspoint multiplexer allows per-channel setup of input buffers, gain, offset, and filter type - all independently programmable via SPI/QSPI/MICROWIRE interface.

It integrates dual LDOs (1.8 V analog/digital), on-chip temperature sensor (±2°C after calibration), GPIO0/GPIO1 referenced to AVDD1/AVSS, and Schmitt-triggered SCLK for robust opto-isolated communication. The device supports internal 16 MHz oscillator, external crystal (14–16.384 MHz), or external clock input via XTAL2/CLKIO.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	32-bit output with no missing codes guaranteed - enables ultra-fine quantization for sub-microvolt signal capture.
Output Data Rate	5 SPS to 10 kSPS; 10 kSPS/channel scan rate ensures fully settled data every 100 µs - critical for fast multichannel scanning.
Noise-Free Bits	19.1 @ 10 kSPS, 20.2 @ 2.5 kSPS, 24.6 @ 5 SPS - defines usable dynamic range without dithering or averaging.
INL Accuracy	±1 ppm of FSR with buffers disabled - matches metrology-grade instrumentation requirements.
Reference Drift	±2 ppm/°C (0°C to 105°C) for internal 2.5 V reference - eliminates need for external ovenized references in wide-temp designs.
Power Supply Rejection	95 dB for AVDD1/AVDD2 - maintains accuracy despite noisy industrial power rails.
Common-Mode Rejection	95 dB at DC, 120 dB at 50/60 Hz - suppresses line-frequency interference in unshielded sensor environments.

Pinout & Package

The AD7177-2BRUZ is housed in a 24-lead TSSOP package (JEDEC MO-153, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin layout supports compact PCB routing with dedicated analog/digital ground separation and independent decoupling paths for AVDD1, AVDD2, and IOVDD supplies.

Pin/Terminal	Circuit Role	Design Meaning
AIN0–AIN4	Analog Input Terminals	Five user-selectable inputs routed via crosspoint mux; support 2-diff or 4-single-ended configurations with true rail-to-rail buffering.
REF+, REF−	External Reference Inputs	Accept 1 V to AVDD1 differential reference; enable precision ratio-metric measurements with external references.
REFOUT	Buffered Internal Reference Output	2.5 V ±0.12% output with ±2 ppm/°C drift - powers external circuitry or serves as stable excitation source.
DOUT/RDY	Serial Data Output / Conversion Ready Flag	Combines data shift register output and interrupt-capable ready signal - simplifies host processor synchronization without extra GPIO.
XTAL1 / XTAL2/CLKIO	Clock Source Interface	Supports crystal (14–16.384 MHz), internal oscillator (16 MHz), or external clock - enables deterministic timing across multi-ADC systems.
SYNC/ERROR	Multi-Device Sync/Error I/O	Configurable as sync input, open-drain error output, or general-purpose output - enables synchronized sampling or fault-broadcast across distributed nodes.

Key Features

Feature	Design Value
Per-Channel Programmability	Independent setup of buffer enable, gain, offset, filter type, and ODR for each of up to 4 active channels - eliminates firmware overhead in mixed-signal applications.
True Rail-to-Rail Buffers	Input buffers accept signals from AVSS to AVDD1 with ±30 nA input current - directly interfaces thermocouples, RTDs, and bridge sensors without external op-amps.
Enhanced 50/60 Hz Rejection	Simultaneous 120 dB rejection at both frequencies at 27.27 SPS - meets IEC 61000-4-7 compliance for EMC-immune metering.
Integrated Temperature Sensor	±2°C accuracy post-calibration at 25°C with 470 µV/K sensitivity - enables on-chip thermal compensation without external ICs.
Robust Digital Interface	SPI/QSPI/MICROWIRE-compatible with Schmitt-triggered SCLK and CRC/checksum protection - ensures reliable communication in electrically noisy industrial settings.

Applications

Process Control Module	Medical Multichannel Instrumentation
Use Scenario: High-density analog input module in PLC/DCS rack handling temperature, pressure, and flow transmitters. IC Role / Device Role / Timing Role: Primary ADC for 4-channel simultaneous acquisition with 100 µs per-channel settling and synchronized start. Use Value: Enables 10 kSPS aggregate throughput while maintaining 19.1 noise-free bits - supports real-time closed-loop control with <100 µs latency.	Use Scenario: Portable patient monitor acquiring ECG, SpO₂, and NIBP signals with isolated front-end. IC Role / Device Role / Timing Role: Precision digitizer for low-noise biopotential amplifiers with programmable gain and 50/60 Hz notch filtering. Use Value: 24.6 noise-free bits at 5 SPS provides >120 dB dynamic range - captures microvolt-level ECG details without external amplification stages.
Chromatography Detector	High-Accuracy Weigh Scale
Use Scenario: Signal conditioning for FID or TCD detectors requiring stable baseline and ppm-level repeatability. IC Role / Device Role / Timing Role: Low-drift ADC with internal 2.5 V reference and ±1 ppm INL - used for integrating peak area under chromatogram curves. Use Value: ±2 ppm/°C reference drift and 85 dB 50/60 Hz rejection ensure consistent integration accuracy across lab temperature swings.	Use Scenario: Legal-for-trade weighing system using strain-gauge load cells in harsh factory environments. IC Role / Device Role / Timing Role: Primary ADC with burnout current sources (±10 µA), rail-to-rail buffers, and 120 dB CMRR - conditions mV-level bridge outputs. Use Value: True rail-to-rail input range and ±1 ppm INL meet OIML R76 Class III requirements without trimming resistors or calibration tables.

Process Control Module

Medical Multichannel Instrumentation

Use Scenario: High-density analog input module in PLC/DCS rack handling temperature, pressure, and flow transmitters.

IC Role / Device Role / Timing Role: Primary ADC for 4-channel simultaneous acquisition with 100 µs per-channel settling and synchronized start.

Use Value: Enables 10 kSPS aggregate throughput while maintaining 19.1 noise-free bits - supports real-time closed-loop control with <100 µs latency.

Use Scenario: Portable patient monitor acquiring ECG, SpO₂, and NIBP signals with isolated front-end.

IC Role / Device Role / Timing Role: Precision digitizer for low-noise biopotential amplifiers with programmable gain and 50/60 Hz notch filtering.

Use Value: 24.6 noise-free bits at 5 SPS provides >120 dB dynamic range - captures microvolt-level ECG details without external amplification stages.

Chromatography Detector

High-Accuracy Weigh Scale

Use Scenario: Signal conditioning for FID or TCD detectors requiring stable baseline and ppm-level repeatability.

IC Role / Device Role / Timing Role: Low-drift ADC with internal 2.5 V reference and ±1 ppm INL - used for integrating peak area under chromatogram curves.

Use Value: ±2 ppm/°C reference drift and 85 dB 50/60 Hz rejection ensure consistent integration accuracy across lab temperature swings.

Use Scenario: Legal-for-trade weighing system using strain-gauge load cells in harsh factory environments.

IC Role / Device Role / Timing Role: Primary ADC with burnout current sources (±10 µA), rail-to-rail buffers, and 120 dB CMRR - conditions mV-level bridge outputs.

Use Value: True rail-to-rail input range and ±1 ppm INL meet OIML R76 Class III requirements without trimming resistors or calibration tables.

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, 24-bit, 125 kSPS max aggregate rate; lower resolution (24-bit vs. 32-bit); no internal reference buffer.	Better suited for high-channel-count, moderate-accuracy data loggers where speed > resolution.	Select when >4 channels needed and 19.1 noise-free bits is sufficient; requires external reference buffering.
LTC2500-32IUK#PBF	32-bit, 1 MSPS, but only 16.5 noise-free bits @ 10 kSPS; no integrated crosspoint mux or per-channel configuration registers.	Optimized for high-speed precision (e.g., motor control feedback), not multichannel scanning or metrology.	Choose for single-channel, high-throughput applications needing faster conversion - not a drop-in replacement for AD7177-2BRUZ's scan architecture.

Compared with AD7177-2BRUZ, AD7173-8BRUZ trades resolution and integrated reference for higher channel count and scan speed, while LTC2500-32IUK#PBF sacrifices multichannel flexibility and low-frequency noise performance for raw sample rate - making AD7177-2BRUZ uniquely balanced for high-accuracy, multi-sensor industrial measurement.

Availability

AD7177-2BRUZ is available at Aetrix Electronics and suitable for process control modules, medical instrumentation, chromatography systems, and legal-for-trade weighing equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD7177-2BRUZ 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.

The AD7177-2BRUZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for high-accuracy, low-power, multichannel industrial and scientific measurement applications demanding metrology-grade linearity and noise performance.

FAQ

What is the maximum channel scan rate supported by the AD7177-2BRUZ?

The AD7177-2BRUZ achieves a maximum channel scan rate of 10 kSPS per channel with full 100 µs settling time. This means that when configured for 4 single-ended or 2 fully differential channels, the device can acquire and settle a complete set of readings across all enabled channels within 400 µs - verified in the datasheet's Table 1 and General Description section. This performance is enabled by its sinc5 + sinc1 filter architecture and true rail-to-rail input buffers. The AD7177-2BRUZ maintains this scan rate while delivering 19.1 noise-free bits of resolution.

Does the AD7177-2BRUZ include an internal voltage reference, and what is its stability?

Yes, the AD7177-2BRUZ integrates a precision 2.5 V band gap reference with ±2 ppm/°C temperature coefficient over 0°C to 105°C, and ±3 ppm/°C over −40°C to +105°C. Its initial accuracy is ±0.12% at 25°C, and it features an output buffer (REFOUT pin) capable of sourcing/sinking ±10 mA. The reference supports both internal use and external circuit biasing, eliminating the need for discrete reference ICs in most high-accuracy designs. This specification is confirmed in the "INTERNAL REFERENCE" section of the AD7177-2BRUZ datasheet Rev. B, Page 4.

Can the AD7177-2BRUZ operate with split analog supplies, and what are the valid voltage ranges?

Yes, the AD7177-2BRUZ supports split analog supplies: AVDD1 and AVSS can be configured as ±2.5 V (i.e., AVDD1 = +2.5 V, AVSS = −2.5 V), or as a single 5 V supply (AVDD1 = 5 V, AVSS = 0 V). AVDD1 must remain between 4.5 V and 5.5 V relative to AVSS, and AVSS may range from −2.75 V to 0 V relative to DGND. These operating modes are explicitly defined in the Absolute Maximum Ratings (Table 3) and Power Requirements (Page 6) sections of the AD7177-2BRUZ datasheet Rev. B.

How does the crosspoint multiplexer in the AD7177-2BRUZ improve system design flexibility?

The crosspoint multiplexer in the AD7177-2BRUZ allows any of the five analog inputs (AIN0–AIN4) to be assigned to either of two differential input pairs or four single-ended channels - dynamically reconfigurable per conversion cycle. This eliminates fixed input routing constraints and enables mixed-mode acquisition (e.g., one thermocouple + one RTD + two strain gauges) without external analog switches. Each channel's configuration - including buffer enable, gain, filter, and ODR - is stored in dedicated registers (Channel Register 0–3), allowing autonomous, software-defined signal chains. This capability is detailed in the "Crosspoint Multiplexer" section (Page 27) of the AD7177-2BRUZ datasheet.

What digital interface protocols does the AD7177-2BRUZ support, and are there hardware-level protections?

The AD7177-2BRUZ supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces using CS, SCLK, DIN, and DOUT/RDY pins. It includes hardware-level protections: CRC calculation (configurable per read/write), checksum verification, Schmitt-triggered SCLK for noise immunity, and programmable IOSTRENGTH. The SYNC/ERROR pin further enables multi-device synchronization or fault-broadcasting via wired-OR configuration. All interface timing parameters - including setup/hold times and bus relinquish - are specified across IOVDD = 2 V to 5.5 V in Table 2 (Timing Characteristics) of the AD7177-2BRUZ datasheet Rev. B.

AD7177-2BRUZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

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

Packaging:: Tube

Product Status:: Active

Number of Bits:: 32

Sampling Rate (Per Second):: 10k

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:: 2.5V ~ 5.5V

Voltage - Supply, Digital:: 2.5V ~ 5.5V

Features:: Temperature Sensor

Operating Temperature:: -40°C ~ 105°C

Supplier Device Package:: 24-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7177-2BRUZ FAQ

1.How can I place an order for AD7177-2BRUZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7177-2BRUZ 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 AD7177-2BRUZ reliable?

The price and inventory of AD7177-2BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7177-2BRUZ is usually 5 days.

3.What payment methods are accepted for AD7177-2BRUZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7177-2BRUZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD7177-2BRUZ?

AD7177-2BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7177-2BRUZ 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 AD7177-2BRUZ?

For technical support, including AD7177-2BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7177-2BRUZ requirements.

6.How does Aetrix verify that AD7177-2BRUZ is sourced from the original manufacturer or authorized distributors?

All AD7177-2BRUZ 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 AD7177-2BRUZ meets industry standards.

7.What is the process for return or replacement of AD7177-2BRUZ?

All AD7177-2BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7177-2BRUZ, 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 AD7177-2BRUZ part is unused and in its original packaging.

Return procedure for AD7177-2BRUZ:

1.Submit a request within 90 days.

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

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