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

Analog Devices Inc. AD7739BRUZ

Name: AD7739BRUZ
Brand: Analog Devices Inc.
SKU: AD7739BRUZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7739BRUZ

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

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

Datasheet:: AD7739BRUZ.pdf

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

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Product details

Overview

AD7739BRUZ from Analog Devices is a 24-bit sigma-delta analog-to-digital converter (ADC) with eight single-ended or four fully differential input channels, ±0.0015% integral nonlinearity, 18-bit peak-to-peak resolution at 500 Hz, and 16-bit peak-to-peak resolution at 4 kHz - optimized for high-precision industrial multiplexing applications such as PLCs and process control instrumentation.

For engineers reviewing the AD7739BRUZ datasheet, AD7739BRUZ pinout, AD7739BRUZ application, or AD7739BRUZ equivalent, this page delivers verified technical context, real-world resolution vs. throughput trade-offs, per-channel calibration capability, configurable input ranges (±0.625 V to ±2.5 V), and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface behavior under extended industrial temperature conditions (–40°C to +105°C).

Technical Context

The AD7739BRUZ implements a chopper-stabilized sigma-delta modulator with on-chip digital filtering, supporting two distinct operating modes: chopping enabled (for ultra-low offset drift: ±25 nV/°C) and chopping disabled (for higher throughput: up to 15 kHz output data rate). Its analog front end accepts common-mode input voltages from 200 mV above AGND to AVDD − 300 mV and features no-reference detect on the differential reference inputs (REFIN(+) and REFIN(−)).

Channel conversion time is programmable via an 8-bit filter word register, enabling precise control over noise-performance versus speed - e.g., 397 µs conversion time yields 2519 Hz output rate with 17.1-bit peak-to-peak resolution at ±1.25 V range. All logic inputs include Schmitt triggers, and the device supports dual supply operation: 5 V analog (AVDD) and 3 V or 5 V digital (DVDD).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	True 24-bit, no missing codes; 18-bit p-p at 500 Hz, 16-bit p-p at 4 kHz - enables high-fidelity sensor digitization without code gaps in demanding industrial measurements.
Integral Nonlinearity	±0.0015% FSR - ensures accurate end-point linearity across full-scale range, critical for calibrated transducer interfaces.
Input Configuration	8 single-ended or 4 fully differential channels - provides flexible signal routing for multi-sensor systems without external multiplexer hardware.
Input Ranges	Configurable ±0.625 V, ±1.25 V, ±2.5 V or unipolar equivalents - matches common industrial sensor outputs (e.g., 4–20 mA with shunt, RTD bridges, strain gauges).
Reference Input	Differential REFIN(+) and REFIN(−) with no-reference detect - allows robust operation even if reference fails, signaling fault via NOREF bit in channel status register.
Serial Interface	3-wire SPI/QSPI/MICROWIRE/DSP compatible with Schmitt-triggered inputs - ensures reliable communication in noisy industrial environments with marginal signal integrity.
Supply & Temp Range	5 V AVDD, 3 V or 5 V DVDD; –40°C to +105°C operation - meets extended industrial requirements for factory automation and energy infrastructure.

Pinout & Package

AD7739BRUZ is housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch), thermally rated at θ_JA = 128°C/W, suitable for compact industrial PCB layouts with moderate power dissipation (≤100 mW normal mode).

Pin/Terminal	Circuit Role	Design Meaning
SCLK	Serial clock input	Schmitt-triggered; controls timing of all serial data transfers - enables synchronization with host controller clocks up to 6.144 MHz.
MCLKIN / MCLKOUT	Master clock oscillator terminals	Support crystal (1–6.144 MHz) or external CMOS clock; MCLKOUT can be disabled to reduce EMI and power in low-noise designs.
CS	Chip select input	Active-low with internal pull-up; enables 3-wire mode when hardwired low, or multi-device bus sharing when controlled externally.
AIN0–AIN7	Analog input channels	Eight single-ended or four differential inputs; each channel supports independent gain/range configuration and system calibration.
AINCOM/P0	Common-mode reference or GPIO	Configurable via P0 DIR bit; serves as AIN reference point or general-purpose digital I/O referenced to analog supplies.
SYNC/P1	Synchronization or GPIO	When sync bit set, synchronizes modulator and filter with external timing sources - essential for coherent multi-ADC sampling in distributed systems.
REFIN(+), REFIN(−)	Differential reference inputs	Accept 2.475–2.525 V reference; no-reference detection asserts NOREF flag if voltage drops below 0.5 V - prevents silent measurement errors.
RDY	Ready status output	Falling edge indicates unread conversion data or completed calibration - eliminates polling overhead in interrupt-driven firmware.

Key Features

Feature	Design Value
Per-channel system calibration	Independent zero-scale and full-scale calibration registers per channel - corrects gain/offset drift without requiring external calibration hardware or recalibration cycles during field operation.
Chopping enable/disable	Software-selectable chopping mode - reduces offset drift to ±25 nV/°C (enabled) or increases max output rate to 15 kHz (disabled), adapting to thermal or speed constraints.
Configurable conversion time	8-bit filter word register sets conversion time from 84 µs to 2689 µs - directly trades resolution (up to 21.4-bit effective) against throughput (372 Hz to 11.8 kHz).
Input overvoltage tolerance	AIN pins withstand ±2.5 V absolute voltage beyond nominal range (e.g., ±16.5 V overvoltage on AD7734 family) - protects against transient faults in harsh industrial wiring environments.
Dual-supply flexibility	Separate 5 V AVDD and 3 V/5 V DVDD rails - allows interfacing with modern low-voltage microcontrollers while maintaining high analog precision and SNR.

Applications

PLC Analog Input Module	Multi-Sensor Industrial Data Logger
Use Scenario: Digitizing 8-channel 4–20 mA current loops and thermocouple signals in a DIN-rail mounted programmable logic controller cabinet with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Primary ADC front end performing simultaneous channel scanning, on-the-fly range selection, and per-channel calibration before data transmission to ARM Cortex-M7 host MCU via SPI. Use Value: 16-bit p-p resolution at 4 kHz enables sub-0.1% accuracy on 16-bit control outputs; built-in common-mode rejection (95 dB) suppresses ground-loop noise in electrically noisy factory floors.	Use Scenario: Battery-powered remote monitoring node collecting vibration, pressure, and temperature data from rotating machinery using piezoelectric accelerometers and strain gauges. IC Role / Device Role / Timing Role: Low-power ADC managing duty-cycled channel acquisition, internal buffer control, and standby mode (80 µA total current) between 10-second logging intervals. Use Value: Reduced power mode cuts AVDD current to 9.2 mA; chopping-disabled operation maintains 15 kHz max output rate for burst-mode high-frequency capture during event-triggered diagnostics.
Process Control Transmitter	High-Accuracy Weigh Scale Controller
Use Scenario: Smart transmitter converting 0–10 V or ±5 V analog sensor outputs (e.g., Coriolis flow meter) into HART or Modbus digital output with NIST-traceable calibration. IC Role / Device Role / Timing Role: Precision ADC providing stable 24-bit raw data with <±0.0015% INL, feeding digital compensation algorithms that correct for temperature-induced sensor drift. Use Value: On-chip per-channel calibration eliminates need for external DACs or trim pots; ±2.5 V input range matches standard industrial sensor spans without external level-shifting circuitry.	Use Scenario: Legal-for-trade weighing instrument measuring load cell outputs (±10 mV full scale) with 10,000+ division resolution and automatic zero-tracking compensation. IC Role / Device Role / Timing Role: High-resolution sigma-delta ADC operating in chopping-enabled mode to minimize offset drift (<±25 nV/°C), ensuring stable zero-point stability over 8-hour production shifts. Use Value: 18-bit p-p resolution at 500 Hz delivers >100 dB dynamic range - sufficient for 100,000:1 weight ratio with 0.001% repeatability, meeting OIML R76 Class III requirements.

PLC Analog Input Module

Multi-Sensor Industrial Data Logger

Use Scenario: Digitizing 8-channel 4–20 mA current loops and thermocouple signals in a DIN-rail mounted programmable logic controller cabinet with ambient temperatures up to +70°C.

IC Role / Device Role / Timing Role: Primary ADC front end performing simultaneous channel scanning, on-the-fly range selection, and per-channel calibration before data transmission to ARM Cortex-M7 host MCU via SPI.

Use Value: 16-bit p-p resolution at 4 kHz enables sub-0.1% accuracy on 16-bit control outputs; built-in common-mode rejection (95 dB) suppresses ground-loop noise in electrically noisy factory floors.

Use Scenario: Battery-powered remote monitoring node collecting vibration, pressure, and temperature data from rotating machinery using piezoelectric accelerometers and strain gauges.

IC Role / Device Role / Timing Role: Low-power ADC managing duty-cycled channel acquisition, internal buffer control, and standby mode (80 µA total current) between 10-second logging intervals.

Use Value: Reduced power mode cuts AVDD current to 9.2 mA; chopping-disabled operation maintains 15 kHz max output rate for burst-mode high-frequency capture during event-triggered diagnostics.

Process Control Transmitter

High-Accuracy Weigh Scale Controller

Use Scenario: Smart transmitter converting 0–10 V or ±5 V analog sensor outputs (e.g., Coriolis flow meter) into HART or Modbus digital output with NIST-traceable calibration.

IC Role / Device Role / Timing Role: Precision ADC providing stable 24-bit raw data with <±0.0015% INL, feeding digital compensation algorithms that correct for temperature-induced sensor drift.

Use Value: On-chip per-channel calibration eliminates need for external DACs or trim pots; ±2.5 V input range matches standard industrial sensor spans without external level-shifting circuitry.

Use Scenario: Legal-for-trade weighing instrument measuring load cell outputs (±10 mV full scale) with 10,000+ division resolution and automatic zero-tracking compensation.

IC Role / Device Role / Timing Role: High-resolution sigma-delta ADC operating in chopping-enabled mode to minimize offset drift (<±25 nV/°C), ensuring stable zero-point stability over 8-hour production shifts.

Use Value: 18-bit p-p resolution at 500 Hz delivers >100 dB dynamic range - sufficient for 100,000:1 weight ratio with 0.001% repeatability, meeting OIML R76 Class III requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7738BRUZ	Higher channel switching speed (8.5 kHz at 16-bit), but higher AIN leakage current and no on-chip buffer; MUX output pinned out externally.	Better suited for applications requiring external programmable gain or signal conditioning before ADC sampling.	Select AD7738BRUZ only when external signal path customization (e.g., PGA, anti-alias filtering) is needed prior to conversion.
AD7195BRUZ	24-bit, 4-channel, lower max throughput (4.8 kHz), integrated PGA (1–128×), better INL (±4 ppm), and superior 50/60 Hz rejection.	Preferred for low-channel-count, high-gain, low-noise applications like weigh scales and precision thermistor measurement.	Choose AD7195BRUZ when PGA integration, enhanced line-frequency rejection, or tighter INL spec outweighs need for 8-channel count.

Compared with AD7739BRUZ, AD7738BRUZ offers faster multiplexing but sacrifices input buffering and leakage performance, while AD7195BRUZ trades channel count and speed for integrated gain and superior AC noise rejection - making AD7739BRUZ the optimal balance for 8-channel, medium-speed, buffered industrial front ends.

Availability

AD7739BRUZ is available at Aetrix Electronics and suitable for PLC analog input modules, industrial data loggers, and process control transmitters requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 9001-certified manufacturing.

Supply support for AD7739BRUZ 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 design centers and manufacturing facilities worldwide.

The AD7739BRUZ belongs to Analog Devices' high-accuracy sigma-delta ADC product line, engineered specifically for industrial process control, factory automation, and precision instrumentation where resolution, channel density, and robustness across extended temperature ranges are critical.

FAQ

What is the maximum output data rate achievable with the AD7739BRUZ?

The AD7739BRUZ achieves a maximum output data rate of 15,133 Hz in chopping-disabled mode with filter word = 0x82 (84 µs conversion time). This rate assumes MCLKIN = 6.144 MHz, ±1.25 V input range, and no post-processing filtering. At this rate, peak-to-peak resolution drops to 10.7 bits, so system designers must validate noise performance against application-specific SNR requirements before selecting this configuration for AD7739BRUZ.

Does the AD7739BRUZ support true bipolar input ranges?

Yes, the AD7739BRUZ supports true bipolar input ranges including ±0.625 V, ±1.25 V, and ±2.5 V, with common-mode input voltage tolerance from 200 mV above AGND to AVDD − 300 mV. This allows direct connection to differential sensors (e.g., load cells, bridge circuits) without level-shifting circuitry. The device also supports unipolar ranges (0–0.625 V, 0–1.25 V, 0–2.5 V), and all ranges are selectable per channel via the channel setup registers in AD7739BRUZ.

How does the AD7739BRUZ handle reference voltage loss?

The AD7739BRUZ implements no-reference detect on its differential reference inputs (REFIN(+) and REFIN(−)). If the voltage between them falls below 0.5 V, the NOREF bit is asserted in the corresponding channel status register. This fault flag enables firmware to halt conversions, trigger alarms, or switch to backup references - preventing undetected erroneous measurements. The feature operates independently of analog input signals and requires no external components to implement in AD7739BRUZ-based systems.

Can the AD7739BRUZ operate with a 3 V digital supply while using 5 V analog supply?

Yes, the AD7739BRUZ supports mixed-supply operation: AVDD = 5 V ± 5% and DVDD = 2.7 V to 3.6 V (or 4.75 V to 5.25 V). When DVDD = 3 V, digital I/O levels shift accordingly (e.g., VINH = 2.5 V, VOL = 0.4 V at 100 µA sink), and DVDD current drops to 1.0–1.5 mA. This configuration allows seamless interfacing with 3 V microcontrollers while preserving full analog performance - a key capability confirmed in the AD7739BRUZ datasheet's power specifications table.

What is the purpose of the SYNC/P1 pin on the AD7739BRUZ?

The SYNC/P1 pin on the AD7739BRUZ serves dual functions: as a synchronization input to align the sigma-delta modulator and digital filter with external timing sources (e.g., master clock in multi-ADC systems), or as a general-purpose digital I/O referenced to analog supplies. Its direction and state are controlled by the P1 DIR and P1 bits in the I/O port register. When used for synchronization, it eliminates inter-channel phase skew and enables coherent sampling across distributed sensor nodes - a critical feature for AD7739BRUZ in time-sensitive industrial control loops.

AD7739BRUZ 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:: 24

Sampling Rate (Per Second):: 15.1k

Number of Inputs:: 4, 8

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

Voltage - Supply, Analog:: 5V

Voltage - Supply, Digital:: 2.7V ~ 3.6V, 5V

Features:: True Bipolar

Operating Temperature:: -40°C ~ 105°C

Supplier Device Package:: 24-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7739BRUZ FAQ

1.How can I place an order for AD7739BRUZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7739BRUZ 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 AD7739BRUZ reliable?

The price and inventory of AD7739BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7739BRUZ is usually 5 days.

3.What payment methods are accepted for AD7739BRUZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7739BRUZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD7739BRUZ?

AD7739BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7739BRUZ 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 AD7739BRUZ?

For technical support, including AD7739BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7739BRUZ requirements.

6.How does Aetrix verify that AD7739BRUZ is sourced from the original manufacturer or authorized distributors?

All AD7739BRUZ 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 AD7739BRUZ meets industry standards.

7.What is the process for return or replacement of AD7739BRUZ?

All AD7739BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7739BRUZ, 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 AD7739BRUZ part is unused and in its original packaging.

Return procedure for AD7739BRUZ:

1.Submit a request within 90 days.

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

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