Analog Devices Inc. AD7492BRU-REEL7

Overview

AD7492BRU-REEL7 from Analog Devices is a 12-bit successive approximation ADC with internal 2.5 V reference and on-chip clock oscillator, operating from a single 2.7 V to 5.25 V supply. It delivers 1.25 MSPS throughput (AD7492-5 variant), 69 dB SINAD at 500 kHz input, 70 dB SNR, and 16 mW power dissipation at 5 V - optimized for high-speed data acquisition in portable instrumentation and real-time control systems.

For engineers reviewing the AD7492BRU-REEL7 datasheet, AD7492BRU-REEL7 pinout, AD7492BRU-REEL7 application, or AD7492BRU-REEL7 equivalent, key selection considerations include its no-pipeline-delay SAR architecture, flexible VDRIVE-controlled I/O voltage levels, dual sleep modes (full/partial), 24-lead TSSOP package, and internal reference/oscillator eliminating external components.

Technical Context

The AD7492BRU-REEL7 implements a capacitive DAC-based SAR conversion core with track/hold amplifier bandwidth up to 10 MHz and aperture jitter of 15 ps typ. Conversion is triggered by falling edge of CONVST, with BUSY asserted for 680 ns (AD7492-5) before result availability - enabling precise timing control without pipeline latency.

Its digital interface uses CS/RD dual-active-low handshake over 12-bit parallel bus, with output drive levels set by VDRIVE (2.7–5.25 V) independent of AVDD/DVDD. Sleep mode selection (PS/FS pin) enables 200 nA full-sleep quiescent current or 190 μA partial-sleep operation - critical for battery-powered sampling systems requiring dynamic power scaling.

Key Specifications

Pinout & Package

AD7492BRU-REEL7 is housed in a 24-lead thin shrink small-outline package (TSSOP) with exposed pad, rated for −40°C to +85°C operation. Pin pitch is 0.65 mm; body dimensions are 4.4 mm × 7.8 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX11100ETL+, AD7492BRU-REEL7 uniquely combines 1.25 MSPS parallel throughput, internal 2.5 V reference, on-chip clock, and dual sleep modes - making it optimal for high-speed, low-power, component-minimized data acquisition where deterministic timing and minimal external support circuitry are required.

Availability

AD7492BRU-REEL7 is available at Aetrix Electronics and suitable for portable instrumentation, motor control feedback loops, and medical signal acquisition requiring stable component supply across extended production lifecycles.

Supply support for AD7492BRU-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, headquartered in Norwood, MA, with design centers worldwide.

The AD7492 product line delivers high-speed, low-power SAR ADCs for precision data acquisition in space- and power-constrained systems - emphasizing integration (internal ref/clock), timing determinism, and flexible power management.

FAQ

What is the maximum throughput rate supported by AD7492BRU-REEL7?

AD7492BRU-REEL7 supports a maximum throughput rate of 1.25 MSPS, corresponding to the AD7492-5 variant. This is achieved with a 680 ns conversion time and 120 ns track/hold acquisition time, enabling real-time sampling of signals up to 625 kHz under Nyquist criteria. The part maintains this rate across its full operating temperature range of −40°C to +85°C.

Does AD7492BRU-REEL7 require an external reference voltage?

No, AD7492BRU-REEL7 does not require an external reference voltage. It integrates a precision 2.5 V reference with ±1.5% initial accuracy, available at the REF OUT pin. This internal reference can be used directly for the ADC's conversion or supplied to external circuitry, eliminating the need for discrete reference ICs and reducing system component count.

How does the PS/FS pin affect power consumption in AD7492BRU-REEL7?

The PS/FS pin on AD7492BRU-REEL7 selects between two hardware-defined sleep modes: tying PS/FS high enables partial sleep (250 μA max quiescent current), while tying it low activates full sleep (1 μA max, typ 200 nA). These modes engage automatically when CONVST remains low after conversion completion - enabling aggressive power scaling in intermittent-sampling applications.

What package type is used for AD7492BRU-REEL7?

AD7492BRU-REEL7 is packaged in a 24-lead thin shrink small-outline package (TSSOP) with 0.65 mm pitch and exposed pad. Its dimensions are 4.4 mm × 7.8 mm × 1.2 mm, supporting standard surface-mount assembly processes. The REEL7 suffix indicates tape-and-reel packaging optimized for automated pick-and-place manufacturing.

Can AD7492BRU-REEL7 interface directly with 3 V logic systems?

Yes, AD7492BRU-REEL7 can interface directly with 3 V logic systems using the VDRIVE pin. By supplying 3 V to VDRIVE, the digital I/O thresholds (VINH/VINL) and output drive levels (VOH/VOL) are scaled accordingly - allowing seamless connection to 3 V microcontrollers or FPGAs without external level shifters, while AVDD/DVDD may remain at 5 V to maximize ADC dynamic performance.