Analog Devices Inc. AD7792BRUZ

Overview

AD7792BRUZ from Analog Devices is a 16-bit, low-noise, low-power Σ-Δ analog-to-digital converter with integrated instrumentation amplifier, internal band gap reference, and three differential input channels. It delivers 40 nV rms noise at 4.17 Hz update rate with gain = 64, operates from 2.7 V to 5.25 V, and supports thermocouple and RTD measurement in industrial process control systems.

For engineers reviewing the AD7792BRUZ datasheet, AD7792BRUZ pinout, AD7792BRUZ application, or AD7792BRUZ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts, and supply-chain support for precision sensor interface designs.

Technical Context

The AD7792BRUZ integrates a programmable-gain instrumentation amplifier (gain = 1–128) directly before its 16-bit Σ-Δ modulator, enabling direct connection of low-level transducer signals without external amplification. Its on-chip 1.17 V band gap reference exhibits 4 ppm/°C drift and supports simultaneous 50 Hz/60 Hz rejection via software-configurable filter settings.

It features dual programmable excitation current sources (10/210/1000 μA), an AVDD/2 bias voltage generator, burnout currents, and a fully isolated 3-wire SPI-compatible serial interface with independent DVDD supply - all housed in a 16-lead TSSOP package rated for –40°C to +105°C operation.

Key Specifications

Pinout & Package

AD7792BRUZ is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. B datasheet Figure 5 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7793BRUZ, AD7792BRUZ trades resolution for cost and power efficiency in fixed-precision applications; versus ADS124S08IPWR, it offers superior supply flexibility, proven industrial temperature range, and dedicated burnout/current-source functionality for sensor health monitoring.

Availability

AD7792BRUZ is available at Aetrix Electronics and suitable for thermocouple measurement, RTD-based temperature sensing, and portable 6-digit DVM applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD7792BRUZ 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 AD7792BRUZ belongs to the AD779x family of precision sigma-delta ADCs designed specifically for low-power, low-noise industrial and instrumentation sensor front ends - emphasizing integrated signal conditioning and robust noise rejection.

FAQ

What is the maximum effective resolution of the AD7792BRUZ?

The AD7792BRUZ provides true 16-bit resolution with no missing codes across its full operating range. At 4.17 Hz update rate with gain = 64 and external 2.5 V reference, it achieves 40 nV rms noise - translating to ~19.5 bits peak-to-peak resolution under ideal conditions. However, its guaranteed effective resolution remains 16 bits, as specified in Table 7 of the AD7792BRUZ datasheet Rev. B.

Does the AD7792BRUZ support both internal and external reference configurations?

Yes, the AD7792BRUZ supports dual reference modes: an internal 1.17 V band gap reference (4 ppm/°C drift) or an external differential reference applied between REFIN(+) and REFIN(−). When using the internal reference, the AD7792BRUZ consumes 400 μA typical; with external reference, current drops to 300–350 μA depending on gain setting - a key consideration for battery-powered AD7792BRUZ deployments.

Can the AD7792BRUZ perform simultaneous 50 Hz and 60 Hz rejection?

Yes, the AD7792BRUZ implements programmable notch filtering that achieves simultaneous 50 Hz and 60 Hz rejection. This is enabled by configuring the FS[3:0] bits in the mode register - for example, FS[3:0] = 1010 yields ≥80 dB normal-mode rejection at both frequencies using the internal clock. This capability is validated in Table 1 of the AD7792BRUZ datasheet and is essential for stable measurements in globally deployed industrial equipment.

What are the excitation current options available on the AD7792BRUZ?

The AD7792BRUZ integrates two matched programmable current sources (IEXC1 and IEXC2), each configurable to deliver 10 μA, 210 μA, or 1000 μA with ±5% initial tolerance and 200 ppm/°C drift. These currents can be routed to IOUT1 or IOUT2 pins and are used for biasing RTDs, strain gauges, or other resistive sensors - a core feature enabling complete analog front-end integration in AD7792BRUZ-based designs.

Is the AD7792BRUZ pin-compatible with the AD7793BRUZ?

Yes, the AD7792BRUZ is fully pin-compatible and footprint-compatible with the AD7793BRUZ - both use the same 16-lead TSSOP package and identical pin assignments. The primary difference lies in resolution (16-bit vs. 24-bit) and associated noise performance; all registers, timing, and interface behavior are identical. This allows drop-in replacement during design iteration or cost optimization without PCB changes.