Analog Devices Inc. AD7492BRUZ-5

Overview

AD7492BRUZ-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. It operates from a single 4.75 V to 5.25 V supply, delivers 70 dB typical SNR at 100 kHz input, and features no pipeline delay for deterministic timing in real-time control loops and high-speed data acquisition systems.

For engineers reviewing the AD7492BRUZ-5 datasheet, AD7492BRUZ-5 pinout, AD7492BRUZ-5 application, or AD7492BRUZ-5 equivalent, this page provides verified specifications, parallel interface timing, sleep-mode power management, analog input bandwidth, and direct replacement guidance for industrial DAQ, motor control feedback, and embedded instrumentation designs.

Technical Context

The AD7492BRUZ-5 implements a capacitive DAC-based SAR architecture with track/hold acquisition time of 120 ns minimum and aperture jitter of 15 ps typical. Conversion is initiated on the falling edge of CONVST, and BUSY asserts for 680 ns maximum before going low to signal completion - enabling precise synchronization without latency uncertainty.

It supports flexible digital interfacing via VDRIVE (2.7 V to 5.25 V), allowing independent logic-level setting for I/O pins while AVDD/DVDD operate at 5 V for optimal analog performance. Sleep mode selection (partial/full) is hardware-controlled by PS/FS, delivering 250 μA or 1 μA quiescent current respectively.

Key Specifications

Pinout & Package

AD7492BRUZ-5 is housed in a 24-lead TSSOP package (RU-24), optimized for compact industrial PCB layouts and thermal performance (θJA = 115°C/W). Pin functions are validated per Analog Devices 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 high-speed ADC applications.

Compared with AD7492BRUZ-5, AD7492BRUZ offers identical functionality at lower speed and cost, while ADS7822U trades parallel simplicity for serial flexibility and higher board-level integration effort due to missing internal reference and clock.

Availability

AD7492BRUZ-5 is available at Aetrix Electronics and suitable for industrial motor control, high-speed sensor data acquisition, and embedded power quality monitoring requiring stable component supply across extended temperature ranges (−40°C to +85°C).

Supply support for AD7492BRUZ-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.

The AD7492 family was designed specifically for high-speed, low-power, single-supply data acquisition in space- and power-constrained industrial and instrumentation systems - emphasizing integration, timing determinism, and ease of microprocessor interfacing.

FAQ

What is the maximum sampling rate supported by the AD7492BRUZ-5?

The AD7492BRUZ-5 supports a maximum throughput rate of 1.25 MSPS, corresponding to a conversion time of 680 ns maximum and track/hold acquisition time of 120 ns minimum. This enables reliable sampling of input signals up to 625 kHz under Nyquist criteria. The AD7492BRUZ-5 achieves this rate with internal clock generation and no pipeline delay, making it suitable for time-critical applications such as motor control feedback loops.

Does the AD7492BRUZ-5 require an external reference voltage?

No, the AD7492BRUZ-5 includes a precision 2.5 V internal reference with ±1.5% accuracy over temperature, available at the REF OUT pin. This eliminates the need for external reference ICs in most applications. The internal reference can also serve as a stable voltage source for external circuitry, reducing component count and layout complexity. External referencing is optional but not required for standard operation of the AD7492BRUZ-5.

How does the PS/FS pin affect power consumption in the AD7492BRUZ-5?

The PS/FS pin on the AD7492BRUZ-5 selects between partial sleep mode (PS/FS = DVDD) and full sleep mode (PS/FS = GND). In partial sleep, the internal reference and oscillator remain active, drawing ≤250 μA; in full sleep, all analog circuitry powers down, drawing ≤1 μA. Both modes activate automatically when CONVST remains low after conversion completes. This hardware-selectable feature enables dynamic power scaling in battery-operated or thermally constrained AD7492BRUZ-5 deployments.

Can the AD7492BRUZ-5 interface directly with a 3 V microcontroller?

Yes, the AD7492BRUZ-5 supports direct interfacing with 3 V logic through its VDRIVE pin. By applying 3 V to VDRIVE, the digital I/O thresholds (VINH/VINL) and output high voltage (VOH) are scaled accordingly, while AVDD and DVDD may remain at 5 V to preserve analog performance. This eliminates level-shifting components and ensures robust signal integrity between the AD7492BRUZ-5 and mixed-voltage host processors.

What is the analog input voltage range for the AD7492BRUZ-5?

The AD7492BRUZ-5 accepts a single-ended analog input voltage range of 0 V to 2.5 V, referenced to AGND. This range aligns precisely with its internal 2.5 V reference, ensuring full-scale utilization without scaling loss. Input leakage is limited to ±1 μA maximum, and input capacitance is 33 pF typical - characteristics that simplify anti-alias filter design and minimize loading on preceding signal conditioning stages in the AD7492BRUZ-5 signal chain.