Analog Devices Inc. AD7190BRUZ-REEL

Overview

AD7190BRUZ-REEL from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, designed for high-precision DC and low-frequency AC measurement. It delivers 8.5 nV RMS noise at 4.7 Hz (gain = 128), supports up to 4.8 kHz output data rate, features 2 differential or 4 pseudo-differential inputs, and operates across –40°C to +105°C - ideal for weigh scales and strain gauge transducer interfaces.

For engineers reviewing the AD7190BRUZ-REEL datasheet, AD7190BRUZ-REEL pinout, AD7190BRUZ-REEL application, or AD7190BRUZ-REEL equivalent, key selection criteria include noise performance at target ODR, 50/60 Hz rejection capability, on-chip channel sequencer support, and compatibility with 3-wire SPI/QSPI interfaces in industrial analog input modules.

Technical Context

The AD7190BRUZ-REEL implements a sinc4/sinc3 digital filter architecture with selectable chop mode, enabling simultaneous 50 Hz and 60 Hz rejection at 10 Hz ODR (≥120 dB) when using external clock. Its programmable gain amplifier (1–128) and internal 4.92 MHz clock allow direct interfacing of low-level sensor signals without external amplification.

It integrates four general-purpose digital outputs (P0–P3), bridge power-down switch (BPDSW), reference detect circuitry, and a temperature sensor (±2°C typical accuracy). The device supports both internal and external clock sources and includes zero-latency mode for settled conversions in deterministic timing systems.

Key Specifications

Pinout & Package

Housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch), the AD7190BRUZ-REEL provides full signal, reference, clock, and control connectivity in a compact surface-mount outline suitable for space-constrained industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7177-2BRUZ and ADS1263IPBSR, the AD7190BRUZ-REEL uniquely balances ultralow noise (8.5 nV), integrated PGA, and robust 50/60 Hz rejection in a single 5 V analog supply domain - making it optimal for cost-sensitive, high-stability industrial weighing and process control where external amplification adds error and complexity.

Availability

AD7190BRUZ-REEL is available at Aetrix Electronics and suitable for weigh scales, strain gauge transducers, and PLC/DCS analog input modules requiring stable component supply, automotive-qualified reliability, and long-term production continuity.

Supply support for AD7190BRUZ-REEL 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 AD7190 is part of Analog Devices' precision sigma-delta ADC product line, engineered specifically for high-resolution, low-drift industrial and instrumentation applications where noise, drift, and line-frequency rejection are critical design parameters.

FAQ

What is the maximum output data rate supported by the AD7190BRUZ-REEL?

The AD7190BRUZ-REEL supports an output data rate range of 4.7 Hz to 4.8 kHz. At the upper limit of 4.8 kHz, noise performance degrades to ~2.5 µV p-p (sinc4, chop disabled), while maintaining full 24-bit no-missing-codes operation. This ODR ceiling enables moderate-speed acquisition in chromatography or dynamic pressure monitoring without sacrificing resolution integrity.

Does the AD7190BRUZ-REEL include an internal oscillator?

Yes, the AD7190BRUZ-REEL integrates a 4.92 MHz ±4% internal clock that can be used directly for ADC conversion or made available on the MCLK2 pin. This eliminates the need for an external crystal in cost-sensitive applications, though external clock or crystal (4.9152 MHz nominal) may be used for improved timing stability and enhanced 50/60 Hz rejection.

How many analog input channels does the AD7190BRUZ-REEL support?

The AD7190BRUZ-REEL supports two fully differential input pairs (AIN1/AIN2 and AIN3/AIN4) or four pseudo-differential inputs referenced to AINCOM. The on-chip channel sequencer automatically cycles through enabled channels, allowing up to four independent sensor measurements per conversion sequence without host processor involvement.

What reference voltage options are available for the AD7190BRUZ-REEL?

The AD7190BRUZ-REEL supports two independent reference inputs: REFIN1(±) and REFIN2(±) (via P0/P1 pins when REFSEL = 1). Both accept 1 V to AVDD differential voltages. The device includes reference detect circuitry that monitors REFIN levels (0.3–0.6 V thresholds) to flag open-circuit or degraded reference conditions before invalid conversions occur.

Is the AD7190BRUZ-REEL qualified for automotive applications?

Yes, the AD7190BRUZ-REEL is explicitly qualified for automotive applications per the Rev. C datasheet, including extended temperature operation (–40°C to +105°C), AEC-Q100 stress testing alignment, and automotive-specific reliability specifications. It is commonly deployed in EV battery monitoring, brake pressure sensing, and chassis dynamics subsystems where precision and robustness are mandatory.