Analog Devices Inc. AD7492AR-REEL7

Overview

AD7492AR-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, operating from a single 4.75–5.25 V supply. It delivers 70 dB typical SNR at 100 kHz input, supports high-speed parallel data access via 12-bit DB[11:0] bus, and features hardware-selectable full/partial sleep modes for ultra-low power operation - used in portable instrumentation and real-time sensor acquisition systems.

For engineers reviewing the AD7492AR-REEL7 datasheet, AD7492AR-REEL7 pinout, AD7492AR-REEL7 application, or AD7492AR-REEL7 equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic/DC specifications, real-world application mappings, and two rigorously cross-checked alternative parts - all aligned to Rev. A datasheet and Analog Devices' official ordering guide.

Technical Context

The AD7492AR-REEL7 implements a capacitive DAC-based SAR architecture with no pipeline delay, sampling on the falling edge of CONVST and completing conversion in 680 ns (max). Its track/hold amplifier supports 10 MHz full-power bandwidth and settles within 120 ns acquisition time.

Conversion control uses asynchronous logic: BUSY asserts high at CONVST fall and deasserts low after conversion completion; CS and RD jointly enable three-state parallel output access. Power management is hardware-driven via PS/FS pin, enabling either 250 μA partial sleep (reference/oscillator active) or 1 μA full sleep (all analog circuitry powered down).

Key Specifications

Pinout & Package

AD7492AR-REEL7 is housed in a 24-lead SOIC package (body width 7.5 mm), RoHS-compliant, tape-and-reel format (REEL7 = 1000-piece reel). Pin layout follows standard SOIC numbering with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492AR-REEL7, the AD7492BR-REEL7 offers improved DC accuracy without sacrificing speed or power, while the ADS7822U trades parallel simplicity and integrated resources for smaller footprint and lower pin count - making it viable only when system-level trade-offs favor serial communication and external component reuse.

Availability

AD7492AR-REEL7 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process monitoring, medical patient monitors, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for AD7492AR-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 design centers worldwide.

The AD7492AR-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high throughput, low power, and minimal external component count - especially where integration of reference, clock, and parallel interface simplifies system design.

FAQ

What is the maximum sampling rate supported by the AD7492AR-REEL7?

The AD7492AR-REEL7 supports 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 per Rev. A datasheet Table 1. The AD7492AR-REEL7 achieves this rate using its internal clock oscillator without external timing components.

Does the AD7492AR-REEL7 require an external reference voltage?

No, the AD7492AR-REEL7 includes a 2.5 V internal reference with ±1.5% accuracy over temperature, available at the REF OUT pin. This reference can be used directly for the ADC's conversion or supplied to external circuitry. An external reference may be applied only if the internal reference is disabled - but the AD7492AR-REEL7 does not support external reference override per its functional block diagram and pin description.

How does the PS/FS pin affect power consumption in the AD7492AR-REEL7?

The PS/FS pin selects between two hardware-defined sleep modes in the AD7492AR-REEL7: tied high (DVDD) enables partial sleep (250 μA max), retaining internal reference and oscillator; tied low (GND) enables full sleep (1 μA max), powering down all analog circuitry. Sleep activation occurs automatically when CONVST remains low after BUSY falls - no software intervention required.

Can the AD7492AR-REEL7 interface directly with 3.3 V logic systems?

Yes, the AD7492AR-REEL7 supports mixed-voltage interfacing via the VDRIVE pin. By applying 3.3 V to VDRIVE, the digital I/O thresholds (VINH/VINL) and output high voltage (VOH) align with 3.3 V logic levels, while AVDD and DVDD may remain at 5 V to preserve ADC dynamic performance - enabling direct connection to 3.3 V FPGAs or microcontrollers without level shifters.

What package type and reel size does AD7492AR-REEL7 use?

The AD7492AR-REEL7 is supplied in a 24-lead small outline integrated circuit (SOIC) package, 7.5 mm body width, RoHS-compliant, and packaged in tape-and-reel format designated REEL7 - indicating a 1000-piece reel quantity per ANSI/EIA-481 standard. This matches Analog Devices' official ordering guide entry for AD7492AR-REEL7.