Analog Devices Inc. AD7472ARU-REEL7

Overview

AD7472ARU-REEL7 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 8.7 mW typical at 5 V/1.5 MSPS. It features a 20 MHz full-power bandwidth, 70 dB typical SNR at 500 kHz input, and integrated track-and-hold for high-fidelity signal acquisition in data acquisition systems.

For engineers reviewing the AD7472ARU-REEL7 datasheet, AD7472ARU-REEL7 pinout, AD7472ARU-REEL7 application, or AD7472ARU-REEL7 equivalent, this page delivers verified specifications, TSSOP-24 package mapping, real-world timing behavior (e.g., 531.66 ns CONVST-to-BUSY delay at 26 MHz), and validated alternative options for industrial sensor interfacing, motor control feedback, and high-speed instrumentation.

Technical Context

The AD7472ARU-REEL7 implements a standard successive approximation register (SAR) architecture with no pipeline delays, enabling deterministic conversion timing controlled by external CONVST and CLK IN signals. Its track-and-hold amplifier supports input frequencies up to 1 MHz and acquires samples within 135 ns (A/B versions) after BUSY goes low.

Conversion is initiated on the falling edge of CONVST; BUSY asserts high and deasserts 531.66 ns later (at 26 MHz clock) to signal completion. Output data appears on DB0–DB11 pins under CS/RD control, with VDRIVE decoupling digital output voltage levels from DVDD to support mixed-voltage system interfacing.

Key Specifications

Pinout & Package

AD7472ARU-REEL7 is housed in a 24-lead TSSOP (RU-24) package with 0.65 mm pitch, optimized for space-constrained PCB layouts and compatible with standard reflow profiles. Thermal impedance is 115°C/W (θJA), requiring minimal copper pour for thermal management at full throughput.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7472ARU-REEL7, AD7472BRU-REEL7 improves DNL guarantee for monotonicity-critical control loops, while ADS8325IPW trades speed and interface for higher resolution in low-throughput precision sensing - neither is pin-compatible, but both serve distinct segments of the high-accuracy ADC design space.

Availability

AD7472ARU-REEL7 is available at Aetrix Electronics and suitable for industrial motor control, high-speed data acquisition, and automotive sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for AD7472ARU-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, with R&D and manufacturing facilities worldwide.

The AD7472ARU-REEL7 belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, low-power, and low-latency applications in industrial automation, test equipment, and real-time control systems.

FAQ

What is the maximum clock frequency supported by AD7472ARU-REEL7?

The AD7472ARU-REEL7 supports a maximum CLK IN frequency of 26 MHz at 5 V operation, corresponding to its rated 1.5 MSPS throughput. At this clock rate, conversion completes in 14 cycles (360.5 ns), and total conversion + acquisition time is 531.66 ns from CONVST falling edge to BUSY deassertion. Exceeding 26 MHz violates timing specifications and may cause data corruption or increased INL error in AD7472ARU-REEL7.

Does AD7472ARU-REEL7 require an external reference voltage?

Yes, AD7472ARU-REEL7 requires an external 2.5 V ±1% reference applied to the REF IN pin to achieve specified DC accuracy and dynamic performance. The device does not include an internal reference; using a precision external reference such as the ADR431 or REF192 ensures ±1 LSB INL and 70 dB SNR. Omitting or misrouting REF IN will result in incorrect full-scale range and degraded linearity in AD7472ARU-REEL7 operation.

Can AD7472ARU-REEL7 interface directly with a 3.3 V microcontroller?

Yes, AD7472ARU-REEL7 can interface directly with a 3.3 V microcontroller by setting VDRIVE = 3.3 V while operating AVDD/DVDD at 5 V - this configures DB0–DB11 outputs for 3.3 V logic levels (VOH ≥ 3.1 V) while preserving analog performance. The part's input thresholds (VINH = 2.4 V min, VINL = 0.4 V max) are fully compatible with 3.3 V CMOS signaling, ensuring reliable CS/RD/CONVST control in AD7472ARU-REEL7 systems.

What is the purpose of the VDRIVE pin on AD7472ARU-REEL7?

The VDRIVE pin on AD7472ARU-REEL7 sets the high-level output voltage (VOH) for the DB0–DB11 parallel data bus, independent of DVDD. This allows AVDD/DVDD to run at 5 V for optimal analog performance while driving 3 V logic interfaces - eliminating level shifters and reducing BOM cost. VOH = VDRIVE – 0.2 V (min at 200 µA sink), so setting VDRIVE = 3.3 V yields VOH ≥ 3.1 V, meeting 3.3 V MCU input requirements in AD7472ARU-REEL7 designs.

How does the auto sleep mode function in AD7472ARU-REEL7?

In auto sleep mode, AD7472ARU-REEL7 automatically enters ultra-low-power state (1 µA typical) immediately after BUSY goes low, provided CONVST remains low. A rising edge on CONVST wakes the device in ≤1 µs, after which it performs conversion and returns to sleep. At 100 kSPS with 3 V supply, this reduces average current to 124 µA - ideal for portable instrumentation where AD7472ARU-REEL7 must balance responsiveness and battery life.