Analog Devices Inc. AD7492BRZ

Overview

AD7492BRZ from Analog Devices is a 12-bit, 1 MSPS successive approximation ADC with internal 2.5 V reference, on-chip clock oscillator, and high-speed parallel interface. It operates from a single 2.7 V to 5.25 V supply, delivers 70 dB typical SNR at 100 kHz input, and supports flexible power management via partial/full sleep modes. It is used in precision data acquisition systems requiring low-latency, no-pipeline-delay conversion.

For engineers reviewing the AD7492BRZ datasheet, AD7492BRZ pinout, AD7492BRZ application, or AD7492BRZ equivalent, this page provides verified technical context, real-world timing behavior (880 ns conversion time), true analog input range (0 V to 2.5 V), confirmed sleep-mode current (200 nA full sleep), and validated package mapping to 24-lead SOIC.

Technical Context

The AD7492BRZ implements a capacitive DAC-based SAR architecture with track/hold amplifier bandwidth up to 10 MHz. Conversion is initiated on the falling edge of CONVST, with BUSY asserted for exactly 880 ns before going low - indicating completion without pipeline delay.

It uses VDRIVE to decouple digital I/O voltage levels (2.7 V–5.25 V) from AVDD/DVDD supplies, enabling mixed-voltage interfacing. The PS/FS pin selects between partial sleep (250 μA) and full sleep (200 nA) modes, both triggered automatically when CONVST remains low after conversion.

Key Specifications

Pinout & Package

AD7492BRZ is packaged in a 24-lead SOIC (Small Outline Integrated Circuit) with standard 0.3-inch body width and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; pins are numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7492BCPZ, AD7492BRZ offers proven manufacturability in SOIC assembly lines and easier thermal management verification; versus ADS7822U, it delivers 5× higher throughput and eliminates two external components - justifying its use where speed, integration, and layout simplicity are prioritized.

Availability

AD7492BRZ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical diagnostics, automotive battery sensing, and benchtop test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AD7492BRZ 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 and ISO 9001-certified manufacturing.

The AD7492BRZ belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high resolution, low power, and minimal external component count in space- and energy-constrained systems.

FAQ

What is the maximum sampling rate supported by the AD7492BRZ?

The AD7492BRZ achieves a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.7 V to 5.25 V, TA = −40°C to +85°C). This corresponds to a minimum conversion time of 880 ns and a track/hold acquisition time of 120 ns. The AD7492BRZ does not support the 1.25 MSPS rate - that applies only to the AD7492-5 variant, which has different timing and power specifications. For AD7492BRZ, 1 MSPS is the guaranteed maximum.

Does the AD7492BRZ require an external reference voltage?

No, the AD7492BRZ does not require an external reference voltage. It integrates a precision 2.5 V internal reference with ±1.5% initial accuracy over temperature, available on the REF OUT pin. This reference can be used directly for the ADC's conversion or supplied to external circuitry. External referencing is optional and only needed if a different reference voltage (e.g., 3.0 V or 4.096 V) is required for system-level scaling.

How does the PS/FS pin affect power consumption in the AD7492BRZ?

The PS/FS pin on the AD7492BRZ selects between two hardware-defined sleep modes: logic high enables partial sleep (250 μA max quiescent current), where the internal reference and oscillator remain active; logic low enables full sleep (1 μA max, typically 200 nA), where all analog circuitry is powered down. Both modes activate automatically when CONVST stays low after conversion completes, and wake-up occurs on the next rising edge of CONVST - with partial sleep waking in 203 μs and full sleep in 500 μs.

Can the AD7492BRZ interface directly with a 3 V microcontroller?

Yes, the AD7492BRZ can interface directly with a 3 V microcontroller using its VDRIVE pin. By applying 3 V to VDRIVE, the digital I/O thresholds (VINH/VINL) and output high voltage (VOH) are scaled accordingly - ensuring compatible logic levels without level shifters. Meanwhile, AVDD and DVDD may remain at 5 V to preserve analog performance (e.g., SNR and THD), making AD7492BRZ ideal for mixed-voltage system designs.

What package type is used for the AD7492BRZ, and is it lead-free?

The AD7492BRZ is supplied in a 24-lead SOIC (Small Outline Integrated Circuit) package with standard 0.3-inch body width and 1.27 mm pitch. It is RoHS-compliant and lead-free per Analog Devices' standard packaging policy. The "RZ" suffix denotes the lead-free, halogen-free, and green-compliant SOIC variant - fully compatible with standard reflow soldering profiles and legacy SOIC footprints.