Analog Devices Inc. AD7492ARUZ-5

Overview

AD7492ARUZ-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, consumes 16 mW typical at full speed, and targets high-speed data acquisition in industrial instrumentation and real-time control systems.

For engineers reviewing the AD7492ARUZ-5 datasheet, AD7492ARUZ-5 pinout, AD7492ARUZ-5 application, or AD7492ARUZ-5 equivalent, this page delivers verified technical context, validated pin functions, confirmed dynamic/DC specifications, sleep-mode behavior, and real-world interface timing - all specific to the AD7492ARUZ-5 variant (not AD7492 or AD7492-4).

Technical Context

The AD7492ARUZ-5 implements a capacitive DAC-based SAR architecture with no pipeline delay, sampling on the falling edge of CONVST and completing conversion in ≤680 ns. Its track/hold amplifier supports 10 MHz full-power bandwidth and 70 dB SNR at 100 kHz input frequency.

It features dual sleep modes selected via PS/FS pin: partial sleep draws ≤250 μA (reference and oscillator remain active), full sleep draws ≤1 μA (all analog circuitry powered down). VDRIVE independently sets I/O voltage levels (2.7 V–5.25 V), enabling 5 V analog core interfacing with 3 V logic.

Key Specifications

Pinout & Package

AD7492ARUZ-5 is housed in a 24-lead TSSOP package (RUZ suffix), with exposed pad for thermal enhancement and standard JEDEC MS-013AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492ARUZ-5, AD7492ARUZ trades 250 kSPS speed for slightly lower power and cost, while ADS7822U sacrifices speed, integration, and deterministic timing for serial interface simplicity - neither offers pin compatibility or identical feature set.

Availability

AD7492ARUZ-5 is available at Aetrix Electronics and suitable for industrial data acquisition, real-time motor control, portable test equipment, and medical signal conditioning requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.

Supply support for AD7492ARUZ-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, with design and manufacturing expertise spanning precision conversion, amplification, and RF technologies.

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 (internal REF/CLK), timing determinism (no pipeline), and flexible I/O (VDRIVE).

FAQ

What is the maximum sampling rate supported by the AD7492ARUZ-5?

The AD7492ARUZ-5 supports a maximum throughput rate of 1.25 MSPS, corresponding to a maximum conversion time of 680 ns. This is explicitly specified for the AD7492-5 variant in Table 1 of the Rev. A datasheet and distinguishes it from the 1 MSPS AD7492 and 400 kSPS AD7492-4 variants. The AD7492ARUZ-5 achieves this speed using an optimized internal clock oscillator and low-latency SAR architecture.

Does the AD7492ARUZ-5 require an external reference voltage?

No, the AD7492ARUZ-5 does not require an external reference voltage. It integrates a 2.5 V internal reference with ±1.5% accuracy over temperature, which is routed to the REF OUT pin and used internally for conversion. This reference can also serve as a stable external reference for other circuitry, eliminating the need for a separate reference IC in most designs.

How does the PS/FS pin affect power consumption in the AD7492ARUZ-5?

The PS/FS pin on the AD7492ARUZ-5 selects between two hardware-defined sleep modes: logic high enables partial sleep (≤250 μA), where the internal reference and oscillator remain active for fast wake-up; logic low enables full sleep (≤1 μA), where all analog circuitry powers down. This selection occurs automatically when CONVST remains low after BUSY falls, making it integral to low-duty-cycle power management in the AD7492ARUZ-5.

Can the AD7492ARUZ-5 interface directly with a 3 V microcontroller?

Yes, the AD7492ARUZ-5 can interface directly with a 3 V microcontroller using its VDRIVE pin. By supplying 3 V to VDRIVE, the digital outputs (DB0–DB11, BUSY, etc.) swing between 0 V and ~2.8 V, and digital inputs (CS, RD, CONVST, PS/FS) recognize logic thresholds scaled to 3 V (e.g., VINH = 2.1 V min). This eliminates level shifters while allowing AVDD/DVDD to remain at 5 V for optimal ADC performance.

What is the purpose of the BUSY signal in the AD7492ARUZ-5 timing sequence?

The BUSY signal in the AD7492ARUZ-5 is a dedicated status output that goes high on the falling edge of CONVST and returns low exactly 680 ns later to indicate conversion completion and data validity. It synchronizes external read operations, triggers acquisition restart (track mode resumes just before BUSY falls), and enables automatic sleep entry when CONVST remains low - serving as the central timing anchor for deterministic parallel interface control in the AD7492ARUZ-5.