Analog Devices Inc. AD7472AR-REEL7

Overview

AD7472AR-REEL7 from Analog Devices is a 12-bit, 1.5 MSPS successive approximation analog-to-digital converter (ADC) with parallel interface, 24-lead SOIC package, and dual supply operation (AVDD/DVDD = 2.7 V to 5.25 V). It features 70 dB typical SNR at 500 kHz input, 5 ns aperture delay, and 14-cycle conversion time synchronized to an external clock. It is used in high-speed data acquisition systems requiring low power and precise timing control.

For engineers reviewing the AD7472AR-REEL7 datasheet, AD7472AR-REEL7 pinout, AD7472AR-REEL7 application, or AD7472AR-REEL7 equivalent, key selection criteria include its 12-bit resolution, 1.5 MSPS throughput at 5 V, sleep-mode current of 1 µA, parallel DB0–DB11 output interface, and SOIC-24 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The AD7472AR-REEL7 implements a standard successive approximation register (SAR) architecture with track-and-hold amplifier, no pipeline latency, and precise sampling controlled by the falling edge of CONVST. Conversion timing is fully determined by an externally supplied clock (up to 26 MHz at 5 V), enabling flexible throughput/power trade-offs.

It uses separate analog (AVDD/AGND) and digital (DVDD/DGND) supplies with strict ±0.3 V inter-supply tolerance, and supports independent VDRIVE (2.7 V to 5.25 V) for level-shifted 3 V/5 V logic interfacing. The BUSY signal provides unambiguous conversion status, and auto-sleep mode activates when CONVST remains low after conversion completion.

Key Specifications

Pinout & Package

AD7472AR-REEL7 is housed in a 24-lead SOIC (R-24) package with standard JEDEC MS-013AC footprint, 1.27 mm pitch, and thermal impedance θ_JA = 75°C/W. Pin 1 is marked with a notch or dot; pins are numbered counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7472BR-REEL7, AD7472AR-REEL7 trades guaranteed 12-bit monotonicity for lower cost and broader availability; versus ADS7822U, it delivers 7.5× higher throughput and hardware-level timing control but requires more PCB area and interface logic.

Availability

AD7472AR-REEL7 is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, medical instrumentation, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7472AR-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 AD7470/AD7472 product line was designed for high-speed, low-power data acquisition in industrial, medical, and instrumentation systems where deterministic timing, parallel interface efficiency, and supply flexibility are critical.

FAQ

What is the maximum clock frequency supported by AD7472AR-REEL7?

The AD7472AR-REEL7 supports up to 26 MHz CLK IN frequency when operated at 5 V supply (VDD = 4.75 V to 5.25 V), enabling its maximum throughput of 1.5 MSPS. At 3 V, the maximum clock is 20 MHz for 1.2 MSPS operation. Exceeding these frequencies may cause timing violations or conversion errors.

Does AD7472AR-REEL7 require an external reference voltage?

Yes, AD7472AR-REEL7 requires an external 2.5 V ±1% reference applied to the REF IN pin. The device does not include an internal reference; accuracy and stability of the external reference directly determine full-scale error and gain drift performance.

Can AD7472AR-REEL7 interface directly with 3 V logic while running on 5 V supplies?

Yes, AD7472AR-REEL7 supports this configuration via the VDRIVE pin. When VDRIVE = 3 V and AVDD/DVDD = 5 V, the parallel outputs (DB0–DB11) swing between 0 V and 2.8 V, ensuring safe, rail-to-rail compatibility with 3 V CMOS inputs without external level shifters.

What is the purpose of the BUSY signal in AD7472AR-REEL7?

The BUSY signal in AD7472AR-REEL7 is a dedicated status output that goes high on the falling edge of CONVST and returns low 531.66 ns later (at 26 MHz CLK IN) to indicate conversion completion. It enables precise, hardware-synchronized data capture without polling or fixed delays.

Is AD7472AR-REEL7 pin-compatible with AD7472BR-REEL7?

Yes, AD7472AR-REEL7 and AD7472BR-REEL7 share identical SOIC-24 packaging, pin assignment, electrical interface, and timing behavior. They differ only in DC accuracy specifications (DNL, INL) and monotonicity guarantee-not in physical or functional compatibility.