Analog Devices Inc. AD7492ARZ-5

Overview

AD7492ARZ-5 from Analog Devices is a 12-bit successive approximation ADC with 1.25 MSPS throughput, 2.5 V internal reference, on-chip clock oscillator, and parallel digital interface. It operates from a single 4.75 V to 5.25 V supply, delivers 69 dB SINAD at 500 kHz input, and supports flexible sleep modes for ultra-low power operation in data acquisition systems.

For engineers reviewing the AD7492ARZ-5 datasheet, AD7492ARZ-5 pinout, AD7492ARZ-5 application, or AD7492ARZ-5 equivalent, this page provides verified technical context, real-world timing behavior (680 ns conversion time), power/throughput trade-offs (16 mW at 1.25 MSPS), and precise interface requirements including VDRIVE-controlled I/O voltage levels and CONVST-triggered sampling.

Technical Context

The AD7492ARZ-5 implements a capacitive DAC-based SAR architecture with no pipeline delay, enabling deterministic sampling control via the falling edge of CONVST and precise conversion completion signaling via BUSY (680 ns high time). Its track/hold amplifier supports 10 MHz full-power bandwidth and settles within 120 ns acquisition time.

Conversion timing is fully self-contained: internal clock drives the process, eliminating external timing components; VDRIVE independently sets digital I/O voltage thresholds (0.3×/0.7×VDRIVE) and output high level (VDRIVE − 0.2 V), allowing mixed-voltage interfacing between 5 V analog core and 3 V logic domains.

Key Specifications

Pinout & Package

AD7492ARZ-5 is housed in a 24-lead SOIC package (RZ suffix per Analog Devices ordering guide), with exposed pad not present. Pin functions are validated per AD7492 Rev. A datasheet Figure 3 and Table 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492ARZ-5, AD7490BRUZ trades 2 bits of resolution and 0.25 MSPS for identical power management and package compatibility, while ADS7822U sacrifices speed and integration for serial simplicity and smaller footprint-neither offers pin-to-pin or functional drop-in replacement capability.

Availability

AD7492ARZ-5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process monitoring, and medical data acquisition requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across −40°C to +85°C.

Supply support for AD7492ARZ-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD7492 product line delivers high-speed, low-power SAR ADCs optimized for embedded data acquisition where deterministic timing, integrated references, and flexible power management are critical.

FAQ

What is the maximum sampling rate of the AD7492ARZ-5?

The AD7492ARZ-5 achieves a maximum throughput rate of 1.25 MSPS under specified conditions (VDD = 4.75 V to 5.25 V, TA = −40°C to +85°C). This rate is enabled by its 680 ns conversion time and 120 ns acquisition time, resulting in a total cycle time of 800 ns. The part maintains full AC and DC performance-including 69 dB SINAD and ±1.25 LSB INL-at this rate.

Does the AD7492ARZ-5 require an external clock source?

No, the AD7492ARZ-5 does not require an external clock source. It integrates a precision on-chip clock oscillator that drives the conversion process autonomously. This eliminates the need for external timing components, reduces system cost and board space, and ensures consistent timing behavior across temperature and supply variations-key for repeatable performance in the AD7492ARZ-5.

How does the VDRIVE pin function in the AD7492ARZ-5?

The VDRIVE pin on the AD7492ARZ-5 supplies power to the digital I/O buffer circuitry and defines logic thresholds: VINH = 0.7 × VDRIVE and VINL = 0.3 × VDRIVE. It also sets the output high voltage (VOH = VDRIVE − 0.2 V). This allows the AD7492ARZ-5 to interface directly with 3 V logic while AVDD and DVDD operate at 5 V-preserving analog performance without level-shifter components.

What sleep modes does the AD7492ARZ-5 support, and how are they selected?

The AD7492ARZ-5 supports two hardware-selectable sleep modes: partial sleep (250 μA max) and full sleep (1 μA max). Selection is made via the PS/FS pin-tied high for partial sleep, low for full sleep. Sleep is automatically entered when CONVST remains low after conversion completes; wake-up occurs on the next rising edge of CONVST, with defined wake-up times (203 μs partial, 500 μs full).

Is the AD7492ARZ-5 pin-compatible with other variants in the AD7492 family?

Yes, the AD7492ARZ-5 shares identical pinout and package (24-lead SOIC) with AD7492ARZ and AD7492ARZ-4 per Analog Devices' ordering guide and pin configuration diagram. All variants use the same DB0–DB11, CONVST, BUSY, CS, RD, VIN, REF OUT, VDRIVE, AVDD, DVDD, AGND, DGND, and PS/FS pin assignments-enabling footprint reuse across speed grades in the AD7492 family.