Analog Devices Inc. AD7193BCPZ-RL7

Overview

AD7193BCPZ-RL7 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 four differential or eight pseudo-differential input channels - enabling direct interface with low-level transducer signals such as strain gauges and RTDs.

For engineers reviewing the AD7193BCPZ-RL7 datasheet, AD7193BCPZ-RL7 pinout, AD7193BCPZ-RL7 application, or AD7193BCPZ-RL7 equivalent, key selection criteria include its simultaneous 50 Hz/60 Hz rejection capability, ±5 nV/°C offset drift, 4.65 mA total supply current, and dual-supply operation (AVDD: 3–5.25 V, DVDD: 2.7–5.25 V) in a space-constrained 32-lead LFCSP package.

Technical Context

The AD7193BCPZ-RL7 implements a programmable gain array (1–128) ahead of a 24-bit Σ-Δ modulator and flexible digital filter (Sinc3/Sinc4, chop, fast settling). Its on-chip channel sequencer enables automatic scanning across up to eight pseudo-differential inputs without host intervention.

Digital interface compliance includes SPI, QSPI™, and MICROWIRE™ protocols with Schmitt-triggered SCLK, while internal reference detection, burnout currents, bridge power-down switch (BPDSW), and integrated temperature sensor (±2°C accuracy post-calibration) support complete system-level signal conditioning for weigh scales and flow meters.

Key Specifications

Pinout & Package

AD7193BCPZ-RL7 is housed in a 32-lead, 5 mm × 5 mm LFCSP package with exposed paddle (CP-32-12), optimized for thermal dissipation and board-level EMI suppression in high-density 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 AD7192BRUZ, AD7193BCPZ-RL7 adds bridge power-down switching and an integrated temperature sensor - critical for weigh scale thermal compensation - while matching noise and channel count. Against ADS1256IPW, AD7193BCPZ-RL7 integrates PGA, reference handling, and 50/60 Hz rejection, reducing external components and PCB area in space-constrained industrial modules.

Availability

AD7193BCPZ-RL7 is available at Aetrix Electronics and suitable for PLC/DCS analog input modules, weigh scales, and medical instrumentation requiring stable component supply, long-lifecycle assurance, and guaranteed traceable sourcing.

Supply support for AD7193BCPZ-RL7 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 worldwide.

The AD719x family was engineered specifically for high-accuracy, low-drift industrial measurement - targeting applications demanding <1 ppm/°C gain drift, simultaneous AC line rejection, and integrated transducer interface functions in compact packages.

FAQ

What is the maximum output data rate supported by the AD7193BCPZ-RL7?

The AD7193BCPZ-RL7 supports an output data rate ranging from 4.7 Hz to 4.8 kHz. The maximum rate of 4.8 kHz is achieved with chop disabled and the sinc4 filter configured. At higher rates, noise performance degrades - for example, RMS noise increases from 11 nV at 4.7 Hz to ~200 nV at 4.8 kHz (gain = 1). This trade-off is documented in the "RMS Noise and Resolution" section of the AD7193BCPZ-RL7 datasheet.

Does the AD7193BCPZ-RL7 require an external crystal, or does it have an internal clock?

The AD7193BCPZ-RL7 includes an internal 4.92 MHz clock that can be used directly or made available on the MCLK2 pin. An external crystal (2.4576–5.12 MHz) or CMOS clock may also be applied between MCLK1 and MCLK2 or to MCLK2 alone. Internal clock operation simplifies BOM and layout; external clocking improves jitter performance for synchronized multi-ADC systems using the SYNC pin.

How many analog input channels does the AD7193BCPZ-RL7 support, and how are they configured?

The AD7193BCPZ-RL7 supports four fully differential input channels (AIN1–AIN2, AIN3–AIN4, AIN5–AIN6, AIN7–AIN8) or eight pseudo-differential channels referenced to AINCOM. Configuration is controlled via the configuration register. The on-chip channel sequencer automatically cycles through enabled channels, allowing continuous multi-sensor acquisition without host processor involvement - a key feature for AD7193BCPZ-RL7 in PLC and DCS applications.

What is the function of the BPDSW pin on the AD7193BCPZ-RL7?

The BPDSW (Bridge Power-Down Switch) pin on the AD7193BCPZ-RL7 connects Wheatstone bridge sensors (e.g., load cells) to AGND during idle conversion periods. This reduces self-heating in bridge elements, minimizing thermal drift and improving long-term stability - especially critical in high-accuracy weigh scale designs. BPDSW is internally controlled by the ADC's state machine and requires no external driver circuitry.

Can the AD7193BCPZ-RL7 operate with separate analog and digital supply voltages?

Yes, the AD7193BCPZ-RL7 supports independent analog (AVDD: 3–5.25 V) and digital (DVDD: 2.7–5.25 V) supplies. This separation allows optimization of noise-sensitive analog sections while powering digital logic from lower-voltage rails - for example, AVDD = 5 V for maximum SNR and DVDD = 3.3 V for MCU compatibility. Ground planes must remain isolated except at a single point to prevent digital noise coupling into the analog domain.