Analog Devices Inc. AD7472BR-REEL7

Overview

AD7472BR-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 70 dB typical SNR at 500 kHz input, 20 MHz full-power bandwidth, and external 2.5 V reference support. It is used in high-throughput data acquisition systems requiring low-latency, no-pipeline-delay conversion.

For engineers reviewing the AD7472BR-REEL7 datasheet, AD7472BR-REEL7 pinout, AD7472BR-REEL7 application, or AD7472BR-REEL7 equivalent, this page delivers verified specifications, SOIC-24 package layout, real-world timing behavior (e.g., 531.66 ns CONVST-to-BUSY delay at 26 MHz), and validated alternative options for industrial sensor interfaces and embedded instrumentation.

Technical Context

The AD7472BR-REEL7 implements a standard successive approximation register (SAR) architecture with integrated track-and-hold, enabling precise sampling control via the falling edge of CONVST and deterministic completion signaled by BUSY. Its 14-clock-cycle conversion time (at up to 26 MHz CLK IN) and 135 ns acquisition time ensure tight timing predictability without pipeline latency.

All digital outputs (DB0–DB11) are three-state, driven by VDRIVE (2.7 V to 5.25 V), allowing independent logic-level interfacing-e.g., 5 V AVDD/DVDD for analog performance while driving 3 V microcontroller buses. The part supports auto-sleep mode triggered by sustained low CONVST, achieving 1 µA max sleep current.

Key Specifications

Pinout & Package

AD7472BR-REEL7 is housed in a 24-lead SOIC (R-24) package with standard 0.3-inch body width and 1.27 mm pitch. Pin 1 is marked by a beveled corner 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 AD7472AR-REEL7, AD7472BR-REEL7 offers superior integral nonlinearity (±1 LSB vs. ±2 LSB) for calibrated systems, while ADS7822U trades speed and interface flexibility for compactness and lower pin count-making AD7472BR-REEL7 optimal for high-fidelity, timing-critical parallel-bus architectures.

Availability

AD7472BR-REEL7 is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, and portable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for AD7472BR-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 AD7472BR-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high speed, low power, and deterministic timing-especially in industrial automation and instrumentation where pipeline-free latency and guaranteed monotonicity are essential.

FAQ

What is the maximum clock frequency supported by AD7472BR-REEL7?

The AD7472BR-REEL7 supports up to 26 MHz CLK IN at 5 V and 20 MHz at 3 V, as specified for B-version operation. At 26 MHz, conversion completes in 14 clock cycles (531.66 ns), enabling its rated 1.5 MSPS throughput. Exceeding these frequencies may violate timing margins and degrade DC accuracy or dynamic performance.

Does AD7472BR-REEL7 require an external reference, and what tolerance is specified?

Yes, AD7472BR-REEL7 requires an external 2.5 V reference applied to the REF IN pin. For full specification compliance-including SNR, INL, and THD-the reference must be stable within ±1% of 2.5 V. Deviations beyond this range directly scale full-scale error and reduce effective resolution.

Can AD7472BR-REEL7 interface directly with a 3 V microcontroller while using 5 V analog supplies?

Yes. AD7472BR-REEL7 supports independent VDRIVE (2.7–5.25 V) for its DB[0:11] outputs. With AVDD = DVDD = 5 V and VDRIVE = 3 V, it delivers VOH ≈ 2.8 V and VOL ≤ 0.4 V-fully compatible with 3 V CMOS logic inputs, while maintaining optimal analog performance.

What is the guaranteed no-missed-codes performance of AD7472BR-REEL7?

The AD7472BR-REEL7 (B version) guarantees no missed codes to 12 bits, as confirmed in its datasheet's DC Accuracy table. This ensures strictly monotonic transfer function across the full 0–4095 code range-critical for closed-loop control and absolute position sensing where code gaps cause instability.

How does the auto-sleep mode function in AD7472BR-REEL7?

In auto-sleep mode, AD7472BR-REEL7 enters low-power state automatically when CONVST remains low after BUSY goes low. Wake-up occurs on the next rising edge of CONVST, with typical 1 µs wake-up time. At 100 kSPS and 3 V, this reduces average current to 124 µA-ideal for battery-powered burst-sampling applications.