Analog Devices Inc. AD7193BRUZ-REEL

Overview

AD7193BRUZ-REEL from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, designed for high-precision analog front-end acquisition in industrial measurement systems. It delivers 11 nV RMS noise at 4.7 Hz (gain = 128), supports up to 4.8 kHz output data rate, and features 4 differential or 8 pseudo-differential input channels - enabling direct interface with low-level transducer signals such as strain gages and RTDs.

For engineers reviewing the AD7193BRUZ-REEL datasheet, AD7193BRUZ-REEL pinout, AD7193BRUZ-REEL application, or AD7193BRUZ-REEL equivalent, key selection criteria include simultaneous 50/60 Hz rejection capability, programmable gain (1–128), internal/external clock flexibility, and guaranteed 22 noise-free bits at gain = 1 for ultra-low-drift weigh scale and PLC analog input module designs.

Technical Context

The AD7193BRUZ-REEL implements a multi-stage digital filter architecture supporting Sinc3, Sinc4, and fast-settling modes - each configurable for distinct trade-offs between noise, settling time, and 50/60 Hz rejection. Its on-chip channel sequencer enables automatic scanning across up to eight pseudo-differential inputs without host intervention.

It integrates a low-drift PGA (±1 ppm/°C gain drift, ±5 nV/°C offset drift), dual reference inputs (REFIN1 and REFIN2), bridge power-down switch (RON = 10 Ω), and four general-purpose digital outputs (P0–P3). The device operates from independent AVDD (3–5.25 V) and DVDD (2.7–5.25 V) supplies, consuming 4.65 mA typical at full performance.

Key Specifications

Pinout & Package

AD7193BRUZ-REEL is packaged in a 28-lead TSSOP (ROHS-compliant, lead-free, tape-and-reel). Pin functions are validated per Analog Devices AD7193 Rev. E datasheet Figure 5 and Table 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7193BRUZ-REEL, AD7173-8BRUZ offers superior resolution but lacks bridge power-down and dual reference flexibility essential for load cell systems, while ADS1256IDBT requires external notch filters and host-driven sequencing - increasing firmware complexity and reducing system-level noise immunity.

Availability

AD7193BRUZ-REEL is available at Aetrix Electronics and suitable for PLC/DCS analog input modules, high-accuracy weigh scales, and medical infusion pump pressure monitors requiring stable component supply across extended product lifecycles.

Supply support for AD7193BRUZ-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 AD719x series was engineered specifically for high-precision industrial and scientific measurement applications - emphasizing ultra-low noise, low drift, and integrated features like 50/60 Hz rejection and channel sequencing to reduce system-level design effort.

FAQ

What is the maximum output data rate supported by the AD7193BRUZ-REEL?

The AD7193BRUZ-REEL supports an output data rate range of 4.7 Hz to 4.8 kHz when chop is disabled. At the upper limit, this enables real-time monitoring of rapidly varying physical parameters such as dynamic pressure or flow in industrial control loops. The actual achievable rate depends on selected filter mode, gain setting, and clock source - for example, chop-enabled operation reduces the maximum to 1.6 kHz in Sinc3 mode.

Does the AD7193BRUZ-REEL support true differential input configurations?

Yes, the AD7193BRUZ-REEL supports four true differential input pairs (AIN1–AIN2, AIN3–AIN4, AIN5–AIN6, AIN7–AIN8), each with independent programmable gain. In differential mode, the device rejects common-mode noise up to 120 dB at 50/60 Hz, making it ideal for noisy plant-floor environments. The analog inputs also support eight pseudo-differential channels referenced to AINCOM.

How does the bridge power-down switch (BPDSW) function in the AD7193BRUZ-REEL?

The BPDSW pin on the AD7193BRUZ-REEL is an internal MOSFET switch that connects the bridge circuit to AGND during idle conversion periods. This eliminates excitation current flow through the strain gage or load cell between measurements, reducing self-heating errors and improving long-term zero-stability - a critical feature for Class III and Class IIII weighing systems compliant with OIML R76.

Can the AD7193BRUZ-REEL operate with a single supply voltage?

No, the AD7193BRUZ-REEL requires two independent supplies: AVDD (3 V to 5.25 V) for the analog section and DVDD (2.7 V to 5.25 V) for the digital interface. This separation minimizes digital switching noise coupling into sensitive analog circuits. While AVDD and DVDD may be set to the same nominal voltage (e.g., both at 5 V), they must be independently decoupled and routed to maintain specified noise performance and PSR (>95 dB).

What reference voltage options are available for the AD7193BRUZ-REEL?

The AD7193BRUZ-REEL provides two independent reference input pairs: REFIN1(+) and REFIN1(−), plus REFIN2(+) and REFIN2(−) (shared with pins P1 and P0). Either pair can be configured as the active reference via the REFSEL bit. Both accept differential voltages from 1 V to AVDD, enabling ratiometric measurements with bridge sensors or high-accuracy absolute measurements using precision external references such as the ADR45xx family.