Analog Devices Inc. AD7933BRUZ

Overview

AD7933BRUZ from Analog Devices is a 10-bit, 1.5 MSPS successive approximation register (SAR) analog-to-digital converter with integrated channel sequencer and on-chip 2.5 V reference. It supports four analog input channels in single-ended, pseudo-differential, or fully differential configurations, operates from a single 2.7 V to 5.25 V supply, and delivers 61 dB SINAD at 50 kHz input frequency for precision data acquisition in industrial sensor interfaces and real-time control systems.

For engineers reviewing the AD7933BRUZ datasheet, AD7933BRUZ pinout, AD7933BRUZ application, or AD7933BRUZ equivalent, this page provides verified technical context, exact pin functions, confirmed dynamic and DC specifications, real-world application mappings, and two validated alternative parts - all derived from Analog Devices' Rev. B datasheet and official pinout documentation.

Technical Context

The AD7933BRUZ implements a SAR architecture with no pipeline delay, using a 25.5 MHz master clock to achieve 1.5 MSPS throughput in 13 clock cycles plus t₂ setup time. Its track-and-hold amplifier supports up to 50 MHz full-power bandwidth and handles 50 kHz sine wave inputs with 61 dB SINAD in differential mode.

It features a software-configurable sequencer for preprogrammed channel selection across VIN0–VIN3, flexible input range (0–VREF or 0–2×VREF), and dual-coding support (straight binary or twos complement). The VDRIVE pin enables independent 3 V/5 V logic interface operation regardless of VDD voltage.

Key Specifications

Pinout & Package

AD7933BRUZ is housed in a 28-lead thin shrink small-outline package (TSSOP) with exposed pad for thermal enhancement. Pin 1 is located at top-left corner when marking side faces up; pin numbering proceeds counterclockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SAR ADC applications.

Compared with AD7934BRUZ, the AD7933BRUZ trades 2 bits of resolution and 9 dB SINAD for lower power and cost in applications where 10-bit fidelity suffices; versus AD7938BRUZ, it retains pin compatibility and VDRIVE advantage at the expense of channel count.

Availability

AD7933BRUZ is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable data loggers, test & measurement front ends, and embedded sensor fusion systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7933BRUZ 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 AD7933BRUZ belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, multi-channel data acquisition in industrial, instrumentation, and real-time control applications where accuracy, timing determinism, and integration matter.

FAQ

What is the maximum sampling rate supported by the AD7933BRUZ?

The AD7933BRUZ supports a maximum throughput rate of 1.5 MSPS under specified conditions (fCLKIN = 25.5 MHz, VDD = 2.7 V to 5.25 V). This rate is achieved with full 10-bit accuracy, 61 dB SINAD at 50 kHz, and guaranteed no missing codes. Conversion time is fixed at t₂ + 13 tCLK, making timing fully deterministic for real-time systems.

Does the AD7933BRUZ require an external reference voltage?

No, the AD7933BRUZ includes an accurate on-chip 2.5 V reference (±0.2% max at 25°C, 25 ppm/°C tempco) that serves as the default reference source. However, the VREFIN/VREFOUT pin can be overdriven with an external reference from 0.1 V to VDD, enabling higher precision or ratiometric configurations when needed.

How does the channel sequencer function in the AD7933BRUZ?

The AD7933BRUZ sequencer allows preprogramming of VIN0–VIN3 channel order via the control register. Once enabled, it automatically cycles through selected inputs without host processor involvement. Channel selection is retained across conversions, reducing software overhead in multi-sensor monitoring applications where consistent acquisition order is required.

What are the logic voltage levels for the parallel interface of the AD7933BRUZ?

The AD7933BRUZ uses VDRIVE to set parallel interface logic thresholds: VINH ≥ 2.4 V (min), VINL ≤ 0.8 V (max). VDRIVE may be independently set to 2.7 V or 5 V - decoupled from VDD - allowing direct interfacing with 3 V or 5 V microprocessors without level shifters, provided VDRIVE stays within VDD ± 0.3 V.

Can the AD7933BRUZ operate in fully differential input mode?

Yes, the AD7933BRUZ supports fully differential input mode across two pairs (VIN0/VIN1 and VIN2/VIN3), configured via MODE bits in the control register. In this mode, it accepts inputs centered at VCM ± VREF/2 (RANGE = 0) or VCM ± VREF (RANGE = 1), with twos complement output coding and guaranteed no missing codes to 10 bits.