Analog Devices Inc. AD7492ARUZ-4

Overview

AD7492ARUZ-4 from Analog Devices is a 12-bit successive approximation ADC with 400 kSPS throughput, internal 2.5 V reference, on-chip clock oscillator, and parallel digital interface. It operates from a single 2.7 V to 5.25 V supply, consumes 15 mW at 5 V/400 kSPS, and features no pipeline delay for deterministic timing in real-time control loops.

For engineers reviewing the AD7492ARUZ-4 datasheet, AD7492ARUZ-4 pinout, AD7492ARUZ-4 application, or AD7492ARUZ-4 equivalent, this page delivers verified specifications, TSSOP-24 pin mapping, sleep-mode power management details, and validated alternative parts for industrial data acquisition, motor control feedback, and portable instrumentation design.

Technical Context

The AD7492ARUZ-4 implements a capacitive DAC-based SAR architecture with track/hold acquisition time of 120 ns and conversion time of 880 ns. Its analog input range is 0 V to 2.5 V (REFIN), supported by internal reference and clock-eliminating external components.

It uses dual ground domains (AGND/DGND) with ≤0.3 V potential difference tolerance, VDRIVE-controlled I/O voltage levels (2.7 V–5.25 V), and hardware-selectable sleep modes (PS/FS pin) enabling 250 μA partial or 1 μA full sleep current-critical for battery-powered systems.

Key Specifications

Pinout & Package

AD7492ARUZ-4 is housed in a 24-lead TSSOP package (RUZ suffix), RoHS-compliant, with 0.65 mm lead pitch and exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492ARUZ-4, the AD7492BRUZ-4 offers improved linearity at identical speed and power, while the ADS7822U trades parallel simplicity for serial flexibility and external component dependency-making AD7492ARUZ-4 optimal for cost-sensitive, medium-speed parallel-interfaced systems requiring integrated reference and clock.

Availability

AD7492ARUZ-4 is available at Aetrix Electronics and suitable for industrial motor control, portable instrumentation, medical diagnostics, and test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for AD7492ARUZ-4 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The AD7492 family targets medium-speed, low-power data acquisition systems requiring integrated reference and clock-designed specifically for industrial automation, portable instrumentation, and real-time control applications where deterministic timing and minimal external components are critical.

FAQ

What is the maximum sampling rate of the AD7492ARUZ-4?

The AD7492ARUZ-4 has a fixed maximum throughput rate of 400 kSPS, corresponding to a total conversion + acquisition time of 880 ns + 120 ns = 1 μs. This is a hardware-defined limit specific to the -4 variant; it cannot be increased to 1 MSPS (AD7492) or 1.25 MSPS (AD7492-5) through configuration or external clocking.

Does the AD7492ARUZ-4 require an external reference or clock source?

No. The AD7492ARUZ-4 integrates a 2.5 V ±1.5% reference (available at REF OUT) and an on-chip clock oscillator. These eliminate the need for external reference ICs or crystal oscillators, reducing bill-of-materials cost and PCB footprint-key advantages confirmed in the Functional Block Diagram and Product Highlights sections of the official datasheet.

How does the PS/FS pin affect power consumption in the AD7492ARUZ-4?

The PS/FS pin selects between two hardware sleep modes: tied high (DVDD) enables partial sleep (250 μA max), retaining reference and oscillator; tied low (GND) enables full sleep (1 μA max), powering down all analog circuitry. Both modes activate automatically when CONVST remains low after BUSY falls-no firmware overhead is required for power management in the AD7492ARUZ-4.

Can the AD7492ARUZ-4 interface directly with a 3 V microcontroller?

Yes. By setting VDRIVE = 3 V, the AD7492ARUZ-4 configures its DB0–DB11 outputs to VOH ≥ 2.8 V and VINH ≥ 2.1 V, meeting 3 V logic thresholds. Meanwhile, AVDD and DVDD may remain at 5 V to preserve SNR performance-this voltage decoupling is explicitly supported and documented in the Logic Inputs/Outputs specifications table.

What is the meaning of "no pipeline delay" for the AD7492ARUZ-4?

"No pipeline delay" means the AD7492ARUZ-4 is a true successive approximation register (SAR) ADC-not a pipelined or sigma-delta architecture. Each conversion starts and completes within a known, fixed 880 ns window after CONVST falling edge, with the result immediately available in the output register. There is no latency from prior conversions affecting current output, ensuring deterministic timing essential for closed-loop control using the AD7492ARUZ-4.