Analog Devices Inc. AD7472BRZ

Overview

AD7472BRZ from Analog Devices is a 12-bit, 1.5 MSPS successive approximation analog-to-digital converter (ADC) with parallel interface, operating from a single 2.7 V to 5.25 V supply and consuming only 4.5 mW at 3 V. It features 70 dB typical SNR at 500 kHz input, 20 MHz full-power bandwidth, and supports external 2.5 V reference for 0 V to 2.5 V unipolar input range. It is used in high-speed data acquisition systems requiring low-latency, no-pipeline-delay conversion.

For engineers reviewing the AD7472BRZ datasheet, AD7472BRZ pinout, AD7472BRZ application, or AD7472BRZ equivalent, key selection considerations include its 12-bit resolution with ±1 LSB INL (B-grade), 14-clock-cycle conversion time, sleep-mode current of 1 µA, and SOIC-24 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The AD7472BRZ implements a standard successive approximation register (SAR) architecture with integrated track-and-hold amplifier, enabling precise sampling control via the CONVST falling edge and eliminating pipeline latency. Conversion timing is fully determined by an externally applied clock (up to 26 MHz at 5 V), and BUSY signal provides synchronous completion indication with 531.66 ns delay from CONVST edge.

It separates analog and digital supplies (AVDD/DVDD) with independent VDRIVE for output level control, supports flexible power-throughput scaling-including auto-sleep mode-and guarantees no missed codes to 12 bits in B-grade version. Input leakage is ±1 µA, aperture jitter is 15 ps typ, and full-power bandwidth is 20 MHz.

Key Specifications

Pinout & Package

AD7472BRZ is housed in a 24-lead SOIC (R-24) package with standard 0.3-inch body width and gull-wing leads. Pin 1 is marked with a beveled corner; pins are numbered counterclockwise. Thermal impedance is θ_JA = 75°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7472BRU and AD7472YRU, the AD7472BRZ provides the optimal balance of precision (±1 LSB INL), industrial temperature compliance, and SOIC manufacturability-making it the default choice for commercial and industrial DAQ designs not requiring extended temp or ultra-compact packaging.

Availability

AD7472BRZ is available at Aetrix Electronics and suitable for medical ultrasound beamforming, industrial motor control feedback, communications baseband receivers, and test & measurement digitizers requiring stable component supply and long-term production continuity.

Supply support for AD7472BRZ 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 AD7472BRZ belongs to the AD7470/AD7472 family of high-speed, low-power SAR ADCs designed specifically for applications demanding deterministic latency, wide input bandwidth, and flexible power scaling in space- and energy-constrained systems.

FAQ

What is the maximum clock frequency supported by AD7472BRZ?

The AD7472BRZ supports a maximum CLK IN frequency of 26 MHz when operated at 5 V supply, corresponding to its rated 1.5 MSPS throughput. At 3 V, the maximum clock is 20 MHz for 1.2 MSPS operation. Exceeding these frequencies violates timing specifications and may cause conversion errors or BUSY timing violations.

Does AD7472BRZ require an external reference voltage?

Yes, AD7472BRZ requires an external 2.5 V ±1% reference applied to the REF IN pin to achieve specified DC accuracy and dynamic performance. The analog input range is 0 V to REF IN, and no internal reference is provided. Using a precision buffered reference improves INL and THD performance.

Can AD7472BRZ interface directly with 3 V logic systems?

Yes, AD7472BRZ can interface with 3 V logic using the VDRIVE pin: tie VDRIVE to 3 V while operating AVDD/DVDD at 5 V. This configures output drivers for VOH ≥ 2.8 V and VOL ≤ 0.4 V, meeting 3 V CMOS input thresholds. Digital inputs remain compatible across 2.7–5.25 V.

What is the guaranteed no-missing-codes performance of AD7472BRZ?

The AD7472BRZ (B-grade) guarantees no missing codes across its full 12-bit range over the industrial temperature range (–40°C to +85°C). This is explicitly confirmed in the AD7472–SPECIFICATIONS table for the B Version, ensuring monotonic behavior essential for closed-loop control and waveform fidelity.

How does the auto-sleep mode function in AD7472BRZ?

In auto-sleep mode, AD7472BRZ automatically enters ultra-low-power state (1 µA max) after conversion completes and BUSY goes low-if CONVST remains low. The next rising edge of CONVST wakes the device in ≤1 µs. This enables energy-proportional operation in burst-mode DAQ systems without external power sequencing.