Analog Devices Inc. AD7472ARUZ-REEL7

Overview

AD7472ARUZ-REEL7 from Analog Devices is a 12-bit, 1.5 MSPS high-speed successive approximation 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 a 20 MHz full-power bandwidth, 70 dB typical SNR at 500 kHz input, and external 2.5 V reference support. It is used in high-throughput data acquisition systems requiring low-latency, no-pipeline-delay conversion - such as real-time motor control feedback loops.

For engineers reviewing the AD7472ARUZ-REEL7 datasheet, AD7472ARUZ-REEL7 pinout, AD7472ARUZ-REEL7 application, or AD7472ARUZ-REEL7 equivalent, key selection considerations include its 12-bit resolution with ±1 LSB INL (B-grade), 14-cycle conversion time, TSSOP-24 package compatibility, and sleep-mode current of 1 µA - critical for power-constrained industrial sensing and portable instrumentation designs.

Technical Context

The AD7472ARUZ-REEL7 implements a standard successive approximation register (SAR) architecture with track-and-hold front-end, enabling precise sampling control via the CONVST falling edge and eliminating pipeline latency. Its conversion timing is fully clock-driven (CLKIN), with fixed 14-cycle conversion time and 135 ns acquisition time (A/B versions).

It supports flexible voltage domain separation: AVDD/DVDD (2.7–5.25 V) power analog/digital logic, while VDRIVE independently sets output high level (e.g., 3 V logic interfacing while AVDD runs at 5 V). Reference is externally applied to REF IN (2.5 V ±1%), and all digital I/Os are three-state, controlled by CS/RD.

Key Specifications

Pinout & Package

AD7472ARUZ-REEL7 is housed in a 24-lead TSSOP (RU-24) package with 0.65 mm pitch, optimized for compact industrial PCB layouts and thermal performance (θJA = 115°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-REEL7 and AD7472YRU-REEL7, the AD7472ARUZ-REEL7 provides the best balance of price, performance, and availability for general-purpose 12-bit high-speed data acquisition - delivering B-grade linearity at A-grade pricing and stock depth, without over-specifying for extended temperature or metrology needs.

Availability

AD7472ARUZ-REEL7 is available at Aetrix Electronics and suitable for industrial motor control, portable instrumentation, medical diagnostics, and automated test equipment requiring stable component supply and long-term production continuity.

Supply support for AD7472ARUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD7472ARUZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high speed, low power, and deterministic timing - especially in real-time control and portable measurement systems.

FAQ

What is the maximum clock frequency supported by AD7472ARUZ-REEL7?

The AD7472ARUZ-REEL7 supports up to 26 MHz CLKIN at 5 V and 20 MHz at 3 V, as specified for A/B-grade operation. Exceeding these frequencies may cause timing violations or reduced AC performance. The conversion time is fixed at 14 clock cycles, so maximum throughput is directly determined by this limit - yielding 1.5 MSPS at 26 MHz.

Does AD7472ARUZ-REEL7 require an external reference, and what tolerance is acceptable?

Yes, AD7472ARUZ-REEL7 requires an external 2.5 V reference applied to the REF IN pin. For full specification compliance, the reference must be stable within ±1% (i.e., 2.475 V to 2.525 V). Deviations beyond this range degrade INL, gain error, and SNR performance - particularly at higher input frequencies.

Can AD7472ARUZ-REEL7 interface directly with a 3 V microcontroller while running AVDD at 5 V?

Yes. AD7472ARUZ-REEL7 supports independent VDRIVE supply (2.7–5.25 V), allowing its DB[0:11] outputs to swing to 3 V logic levels even when AVDD is at 5 V. This preserves analog performance (e.g., SNR, THD) while ensuring safe, compatible interfacing with 3 V digital controllers without level shifters.

What is the purpose of the BUSY signal in AD7472ARUZ-REEL7 operation?

The BUSY signal in AD7472ARUZ-REEL7 goes high on the falling edge of CONVST and remains high for the full conversion duration (531.66 ns at 26 MHz), then falls to indicate data readiness. It synchronizes read operations - RD/CS should be asserted only after BUSY goes low to ensure valid DB[0:11] output. This eliminates polling or fixed delays in firmware.

How does sleep mode operate in AD7472ARUZ-REEL7, and what is its wake-up time?

AD7472ARUZ-REEL7 enters sleep mode automatically when CONVST remains low after BUSY falls. In this state, it draws just 1 µA (typ). Wake-up is triggered by the next rising edge of CONVST, with typical wake-up time of 1 µs - after which the part is ready for a new conversion. This mode is ideal for intermittent sampling to minimize average power.