Analog Devices Inc. AD7472BRUZ

Overview

AD7472BRUZ from Analog Devices is a 12-bit, 1.5 MSPS high-speed successive approximation ADC with parallel interface, 2.7 V to 5.25 V single-supply operation, and external 2.5 V reference input. It features 70 dB typical SNR at 500 kHz input frequency, 5 ns aperture delay, and 15 ps aperture jitter - enabling precision digitization in high-frequency data acquisition systems such as industrial process monitoring and medical instrumentation.

For engineers reviewing the AD7472BRUZ datasheet, AD7472BRUZ pinout, AD7472BRUZ application, or AD7472BRUZ equivalent, this page delivers verified technical context, real-world timing behavior, package-specific layout guidance, and validated alternative options for system-level design continuity.

Technical Context

The AD7472BRUZ implements a standard successive approximation register (SAR) architecture with no pipeline delays, using a falling-edge-triggered CONVST signal to initiate sampling and conversion simultaneously. Its track-and-hold amplifier supports >1 MHz input bandwidth and achieves full-power bandwidth of 20 MHz at 3 dB.

Conversion timing is fully clock-driven: 14 CLK IN cycles (max) for conversion plus 135 ns (A/B versions) or 140 ns (Y version) acquisition time determine throughput. BUSY goes high on CONVST fall and returns low 531.66 ns later (at 26 MHz CLK IN), signaling result availability for parallel read via CS/RD handshake.

Key Specifications

Pinout & Package

AD7472BRUZ is housed in a 24-lead TSSOP (RU-24) package with exposed pad for thermal performance. Pin assignments are identical to AD7472ARU and optimized for noise-sensitive analog-digital partitioning.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit high-speed parallel ADC applications.

Compared with AD7472BRUZ, AD7472BR offers identical electrical performance in a larger SOIC package with better thermal dissipation but higher board area; ADS7822U trades speed and parallel interface for ultra-low power and serial simplicity - making it unsuitable as a drop-in replacement but viable for cost- and size-optimized low-speed designs.

Availability

AD7472BRUZ is available at Aetrix Electronics and suitable for industrial process monitoring, medical instrumentation, and motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD7472BRUZ 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 AD7472BRUZ belongs to the AD7470/AD7472 family of high-speed, low-power SAR ADCs designed specifically for precision data acquisition in space- and power-constrained industrial and medical systems.

FAQ

What is the maximum clock frequency supported by AD7472BRUZ?

The AD7472BRUZ supports up to 26 MHz CLK IN at 5 V and 20 MHz at 3 V for its B version. At 26 MHz, conversion time is fixed at 14 clock cycles (538.5 ns), enabling the rated 1.5 MSPS throughput. Exceeding 26 MHz violates timing specifications and risks metastability or incorrect code generation in the AD7472BRUZ.

Does AD7472BRUZ require an external reference voltage?

Yes, AD7472BRUZ requires a precise 2.5 V ±1% external reference applied to the REF IN pin. The device does not include an internal reference. Using a low-noise, low-drift reference such as the ADR431 ensures specified DC accuracy (±1 LSB INL) and dynamic performance (70 dB SNR) across temperature in the AD7472BRUZ.

Can AD7472BRUZ operate from a single 3.3 V supply?

Yes, AD7472BRUZ operates from a single 2.7 V to 5.25 V supply across all rails (AVDD, DVDD, VDRIVE). At 3.3 V, it delivers 1.2 MSPS throughput (B version), 70 dB SNR, and 4.5 mW typical power dissipation - making it ideal for low-voltage embedded systems where the AD7472BRUZ maintains full 12-bit functionality without performance compromise.

How does the auto sleep mode function in AD7472BRUZ?

In auto sleep mode, AD7472BRUZ automatically enters a 1 µA standby state after conversion completes if CONVST remains low. A rising edge on CONVST wakes the device within 1 µs, initiating the next conversion. This feature reduces average current to 124 µA at 100 kSPS (3 V), extending battery life in portable AD7472BRUZ-based systems without firmware overhead.

What is the purpose of the VDRIVE pin on AD7472BRUZ?

The VDRIVE pin sets the high-level output voltage (VOH = VDRIVE – 0.2 V) for the DB0–DB11 parallel data bus. This allows AD7472BRUZ to operate AVDD at 5 V for optimal analog performance while interfacing directly with 3 V logic controllers - eliminating level shifters and preserving signal integrity in mixed-voltage AD7472BRUZ designs.