Analog Devices Inc. AD7492AR-5

Overview

AD7492AR-5 from Analog Devices is a 12-bit, 1.25 MSPS successive approximation ADC with integrated 2.5 V reference and on-chip clock oscillator, operating from a single 4.75 V to 5.25 V supply. It delivers 70 dB typical SNR at 100 kHz input, 680 ns conversion time, and supports high-speed parallel interface with VDRIVE-level flexibility for mixed-voltage system interfacing - used in precision data acquisition systems requiring low-latency, pipeline-free sampling.

For engineers reviewing the AD7492AR-5 datasheet, AD7492AR-5 pinout, AD7492AR-5 application, or AD7492AR-5 equivalent, this page provides verified technical context, real-world timing and accuracy specs, validated sleep-mode power management, confirmed SOIC-24 package mapping, and two field-tested alternative parts with documented functional trade-offs.

Technical Context

The AD7492AR-5 implements a capacitive DAC-based SAR architecture with track/hold bandwidth up to 10 MHz and no pipeline delay. Conversion is triggered on the falling edge of CONVST, with BUSY going high for exactly 680 ns before signaling completion - enabling deterministic timing control in real-time embedded systems.

It features dual hardware-selectable sleep modes (partial and full) controlled by PS/FS, achieving 250 μA max quiescent current in partial sleep and 1 μA max in full sleep. The VDRIVE pin independently sets digital I/O voltage levels (2.7 V–5.25 V), decoupling logic interface from analog supply while preserving 12-bit DC accuracy (±1.25 LSB INL max, ±0.9 LSB DNL max).

Key Specifications

Pinout & Package

AD7492AR-5 is housed in a 24-lead SOIC package (body width 7.5 mm, JEDEC MS-013AC), with exposed pad not present and RoHS-compliant finish. Pin layout supports standard PCB routing for high-speed parallel bus interfaces and separate analog/digital ground partitioning.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492BR-5, the AD7492AR-5 trades minor linearity margin (±1.5 LSB vs ±1.25 LSB) for broader availability and lower unit cost, while retaining identical timing, power, and feature set. Against ADS7822U, AD7492AR-5 delivers 5× throughput and removes dependency on external reference/clock - reducing system-level validation effort and bill-of-materials risk.

Availability

AD7492AR-5 is available at Aetrix Electronics and suitable for industrial process monitoring, medical instrumentation, automotive sensor interface, test & measurement equipment, and portable diagnostics requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for AD7492AR-5 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 design centers and manufacturing facilities worldwide.

The AD7492 family belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high throughput, low power, and minimal external component count - especially in space- and power-constrained data acquisition systems.

FAQ

What is the maximum sampling rate supported by the AD7492AR-5?

The AD7492AR-5 supports a maximum throughput rate of 1.25 MSPS, corresponding to a conversion time of 680 ns and acquisition time of 120 ns. This allows continuous sampling of input signals up to 500 kHz (Nyquist limit), with timing fully specified and guaranteed across −40°C to +85°C ambient temperature.

Does the AD7492AR-5 require an external clock or reference voltage?

No, the AD7492AR-5 does not require an external clock or reference. It integrates a precision 2.5 V reference (±1.5% tolerance) available on the REF OUT pin and an on-chip clock oscillator - eliminating two external components and associated layout complexity while ensuring timing stability across temperature and supply variations.

How does the PS/FS pin affect power consumption in the AD7492AR-5?

The PS/FS pin configures the AD7492AR-5's sleep behavior: tied high, it enables partial sleep mode (250 μA max quiescent current, reference and clock remain active); tied low, it enables full sleep mode (1 μA max, all analog blocks powered down). This hardware-selectable feature allows precise power/performance tuning without firmware overhead.

Can the AD7492AR-5 interface directly with a 3 V microcontroller?

Yes, the AD7492AR-5 can interface directly with a 3 V microcontroller using its VDRIVE pin. By applying 3 V to VDRIVE, the digital I/O thresholds (VINH/VINL) and output voltage levels (VOH/VOL) are scaled accordingly - enabling reliable communication without level-shifting circuitry, while AVDD/DVDD remain at 5 V to preserve analog performance.

What package type is used for the AD7492AR-5, and is it lead-free?

The AD7492AR-5 is supplied in a 24-lead SOIC package (JEDEC MS-013AC, 7.5 mm body width) with RoHS-compliant, lead-free finish. This package supports standard reflow soldering profiles and is compatible with automated assembly processes used in industrial and medical electronics manufacturing.