Analog Devices Inc. AD7933BRUZ-REEL7

Overview

AD7933BRUZ-REEL7 from Analog Devices is a 10-bit, 4-channel, 1.5 MSPS successive approximation register (SAR) analog-to-digital converter with integrated channel sequencer and on-chip 2.5 V reference. It operates from a single 2.7 V to 5.25 V supply, supports single-ended/pseudo-differential/fully differential input configurations via software control, and delivers 61 dB SINAD at 50 kHz input frequency in differential mode. It is used in multichannel data acquisition systems requiring precise timing control and low-latency conversion without pipeline delay.

For engineers reviewing the AD7933BRUZ-REEL7 datasheet, AD7933BRUZ-REEL7 pinout, AD7933BRUZ-REEL7 application, or AD7933BRUZ-REEL7 equivalent, key selection considerations include its 10-bit resolution, 4-channel sequencer capability, parallel word/byte interface with VDRIVE voltage independence, 2.5 V internal reference accuracy (±0.2% @ 25°C), and TSSOP-28 package compatibility for space-constrained industrial sensor interfaces.

Technical Context

The AD7933BRUZ-REEL7 implements a SAR architecture with a differential track-and-hold amplifier supporting up to 50 MHz full-power bandwidth. Its sequencer enables preprogrammed channel cycling across VIN0–VIN3 without host intervention, and conversion is triggered by the falling edge of CONVST with no latency between sampling and BUSY assertion.

It features dual-domain power management: VDD powers analog and core logic, while VDRIVE independently sets I/O voltage levels (2.7 V to 5.25 V), enabling direct interfacing to 3 V or 5 V microprocessors. The on-chip 2.5 V reference can be overdriven externally, and the control register configures input range (0–VREF or 0–2×VREF), coding (straight binary or two's complement), and power modes (normal, autostandby, full shutdown).

Key Specifications

Pinout & Package

AD7933BRUZ-REEL7 is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm body, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7933BRUZ-REEL7, AD7934BRUZ-REEL7 provides higher resolution at identical speed and footprint, while AD7938BRUZ-REEL7 trades package size and thermal performance for double the channel count-neither is pin-compatible, but all three share register mapping and timing behavior for streamlined firmware reuse.

Availability

AD7933BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, medical instrumentation, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7933BRUZ-REEL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7933BRUZ-REEL7 belongs to the AD793x family of high-speed, low-power SAR ADCs designed specifically for multichannel data acquisition in space- and power-constrained embedded systems where deterministic latency and minimal external components are essential.

FAQ

What is the maximum analog input frequency supported by the AD7933BRUZ-REEL7?

The AD7933BRUZ-REEL7 supports a full-power bandwidth of 50 MHz @ −3 dB and 10 MHz @ −0.1 dB, verified under differential input conditions with VDD = 5 V. Its 72 ps typical aperture jitter and 5 ns aperture delay enable accurate digitization of high-frequency signals up to 50 kHz while maintaining 61 dB SINAD, making it suitable for dynamic signal analysis in motor control and instrumentation applications where the AD7933BRUZ-REEL7 is deployed.

Does the AD7933BRUZ-REEL7 require an external reference voltage?

No, the AD7933BRUZ-REEL7 includes an accurate on-chip 2.5 V reference with ±0.2% maximum error at 25°C and 25 ppm/°C temperature coefficient. This internal reference is sufficient for most precision applications; however, the VREFIN/VREFOUT pin can be overdriven with an external reference from 0.1 V to VDD if tighter tolerance or custom voltage is required. The AD7933BRUZ-REEL7 maintains full specification compliance whether using internal or external reference.

How does the channel sequencer in the AD7933BRUZ-REEL7 operate?

The AD7933BRUZ-REEL7 sequencer automatically cycles through up to four analog inputs (VIN0–VIN3) in user-defined order without processor intervention. Sequencing is enabled and configured via the MODE bits in the control register; once started, conversions occur at the programmed throughput rate (up to 1.5 MSPS) with each result tagged by channel ID in byte mode. This hardware sequencing reduces firmware overhead and ensures deterministic timing-critical for synchronized multichannel acquisition in the AD7933BRUZ-REEL7.

What are the power management modes available for the AD7933BRUZ-REEL7?

The AD7933BRUZ-REEL7 offers three power modes: Normal (2.7 mA max @ 5 V), Autostandby (160 μA typ @ 100 kSPS), and Full/Autoshutdown (2 μA max). Mode selection is controlled via the control register. In Full Shutdown, all circuitry except wake-up logic is disabled; Autostandby reduces current during idle periods between conversions. These modes allow dynamic power optimization in battery-powered or thermally sensitive systems using the AD7933BRUZ-REEL7.

Can the AD7933BRUZ-REEL7 interface directly with a 3.3 V microcontroller?

Yes, the AD7933BRUZ-REEL7 supports direct interfacing with 3.3 V microcontrollers via its VDRIVE pin: setting VDRIVE = 3.3 V configures the parallel interface (DB0–DB11, RD, WR, CS, etc.) to operate at 3.3 V logic levels, independent of VDD (which may be 5 V for analog section). Input thresholds (VIH = 2.4 V min, VIL = 0.8 V max) and output drive strength (200 μA) ensure robust communication-no level shifters are needed when integrating the AD7933BRUZ-REEL7 into mixed-voltage systems.