Analog Devices Inc. AD7492ARZ-REEL7

Overview

AD7492ARZ-REEL7 from Analog Devices is a 12-bit, 1.25 MSPS successive approximation ADC with integrated 2.5 V reference and on-chip clock oscillator. It operates from a single 4.75–5.25 V supply, consumes 16 mW at full throughput, and delivers 70 dB SNR at 100 kHz input - enabling high-fidelity data acquisition in space-constrained industrial sensor interfaces.

For engineers reviewing the AD7492ARZ-REEL7 datasheet, AD7492ARZ-REEL7 pinout, AD7492ARZ-REEL7 application, or AD7492ARZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes performance, flexible sleep-mode power management (down to 200 nA), parallel interface timing compatibility with 8051/ARM microcontrollers, and VDRIVE-level independent digital I/O for mixed-voltage system interfacing.

Technical Context

The AD7492ARZ-REEL7 implements a capacitive DAC-based SAR architecture with track/hold bandwidth up to 10 MHz and aperture jitter of just 15 ps typ. Conversion is initiated on the falling edge of CONVST, with BUSY asserted for 680 ns (max) before signaling completion - eliminating pipeline delay and enabling deterministic sampling control.

Its dual sleep modes (partial/full) are hardware-selected via PS/FS, allowing dynamic power scaling: partial sleep draws ≤250 μA while retaining internal reference and oscillator, full sleep draws ≤1 μA with full analog circuit shutdown. The VDRIVE pin decouples digital I/O voltage (2.7–5.25 V) from AVDD/DVDD, supporting direct interfacing to 3 V logic without level shifters.

Key Specifications

Pinout & Package

AD7492ARZ-REEL7 is housed in a 24-lead SOIC package (body width 7.5 mm, JEDEC MS-013AC), RoHS-compliant and tape-and-reel packaged per REEL7 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX1166BCAP+, AD7492ARZ-REEL7 uniquely combines 12-bit parallel interface, 1.25 MSPS throughput, internal reference, and VDRIVE-level independence - making it the only option among the three that supports high-speed deterministic sampling in mixed-voltage industrial controllers without external support components.

Availability

AD7492ARZ-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and portable test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AD7492ARZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD7492ARZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for high-speed, low-power data acquisition in industrial automation, test instrumentation, and medical devices where deterministic timing and minimal external components are critical.

FAQ

What is the maximum sampling rate supported by the AD7492ARZ-REEL7?

The AD7492ARZ-REEL7 achieves a maximum throughput rate of 1.25 MSPS, corresponding to a conversion time of 680 ns and acquisition time of 120 ns. This specification applies under VDD = 4.75–5.25 V and TA = −40°C to +85°C conditions, and is validated for the AD7492-5 variant - which AD7492ARZ-REEL7 implements. The part maintains guaranteed no-missed-codes performance across this full speed range.

Does the AD7492ARZ-REEL7 require an external reference voltage?

No, the AD7492ARZ-REEL7 integrates a precision 2.5 V reference with ±1% initial accuracy and buffered REF OUT pin. This internal reference is used for ADC conversion and may also serve as a stable external reference for auxiliary circuitry. An external reference is optional and only needed if higher accuracy or different voltage levels are required.

How does the VDRIVE pin function in the AD7492ARZ-REEL7?

The VDRIVE pin on the AD7492ARZ-REEL7 sets the supply voltage for digital I/O buffers (DB0–DB11, CS, RD, CONVST, PS/FS, BUSY), independently from AVDD and DVDD. When VDRIVE = 3.3 V, the part drives 3.3 V logic levels while AVDD/DVDD operate at 5 V - enabling direct interfacing with 3 V microcontrollers without level shifters. Input thresholds scale proportionally to VDRIVE × 0.3 (low) and VDRIVE × 0.7 (high).

What sleep modes does the AD7492ARZ-REEL7 support, and how are they selected?

The AD7492ARZ-REEL7 supports two hardware-selectable sleep modes: partial sleep (≤250 μA) and full sleep (≤1 μA). Selection is made via the PS/FS pin: tied high (DVDD) for partial sleep, tied low (DGND) for full sleep. In partial sleep, the internal reference and oscillator remain active; in full sleep, all analog circuitry powers down. Wake-up occurs on the next rising edge of CONVST, with 203 μs (partial) or 500 μs (full) latency.

Is the AD7492ARZ-REEL7 pin-compatible with other variants in the AD7492 family?

Yes, the AD7492ARZ-REEL7 shares identical 24-lead SOIC pinout and functionality with AD7492, AD7492-4, and AD7492-5 - differing only in maximum throughput (1.25 MSPS for AD7492-5) and specified power supply range (4.75–5.25 V). All variants use the same CONVST/BUSY timing protocol, parallel data interface, and sleep-mode control scheme, enabling direct substitution where speed and supply constraints align.