Analog Devices Inc. AD7492BRZ-5

Overview

AD7492BRZ-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 high-speed parallel interface. It operates from a single 4.75 V to 5.25 V supply, delivers 69 dB SINAD at 500 kHz input, and supports flexible power management via partial/full sleep modes. It is used in high-speed data acquisition systems requiring low-latency, no-pipeline-delay conversion.

For engineers reviewing the AD7492BRZ-5 datasheet, AD7492BRZ-5 pinout, AD7492BRZ-5 application, or AD7492BRZ-5 equivalent, this page provides verified technical context, real-world timing behavior (680 ns conversion time), power-performance trade-offs (16 mW at 1.25 MSPS), and validated alternative options for industrial and instrumentation signal chain design.

Technical Context

The AD7492BRZ-5 implements a capacitive DAC-based SAR architecture with track/hold acquisition time of 120 ns and aperture jitter of 15 ps typ. Its conversion is triggered on the falling edge of CONVST, with BUSY going low 680 ns later - confirming true single-cycle latency and no pipeline delay.

It features hardware-selectable sleep modes (via PS/FS pin), VDRIVE-controlled I/O voltage levels (2.7 V–5.25 V), and independent analog/digital supplies (AVDD/DVDD) with ≤0.3 V inter-rail tolerance. The 2.5 V internal reference is buffered and available on REF OUT with ±1.5% accuracy over temperature.

Key Specifications

Pinout & Package

AD7492BRZ-5 is housed in a 24-lead SOIC package (body width 7.5 mm, JEDEC MS-013). Pin assignments 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 AD7492BRZ-5, AD7492BRZ trades 250 kSPS throughput for identical power and feature set, while ADS8325IPW sacrifices speed, parallel simplicity, and internal reference to gain 4 extra bits - making AD7492BRZ-5 optimal for latency-critical, medium-resolution, low-component-count designs.

Availability

AD7492BRZ-5 is available at Aetrix Electronics and suitable for high-speed data acquisition, portable instrumentation, medical sensor interfaces, and automated test equipment requiring stable component supply and long-term manufacturability.

Supply support for AD7492BRZ-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 space- and power-constrained applications demanding high-speed, low-latency, single-supply analog-to-digital conversion with minimal external components.

FAQ

What is the maximum sampling frequency supported by the AD7492BRZ-5?

The AD7492BRZ-5 supports a maximum throughput rate of 1.25 MSPS, corresponding to a Nyquist frequency of 625 kHz. This is enabled by its 680 ns conversion time and 120 ns acquisition time, both specified under VDD = 4.75 V to 5.25 V and −40°C to +85°C. The AD7492BRZ-5 achieves this without pipeline delay, ensuring each sample is fully resolved before the next CONVST edge.

Does the AD7492BRZ-5 require an external clock source?

No, the AD7492BRZ-5 does not require an external clock source. It integrates a precision on-chip clock oscillator that drives the conversion process. The internal clock eliminates timing jitter from external sources and removes the need for crystals, oscillators, or clock distribution circuitry - a key advantage confirmed in the Product Highlights and Functional Block Diagram of the AD7492BRZ-5 datasheet.

Can the AD7492BRZ-5 operate with different analog and digital supply voltages?

Yes, the AD7492BRZ-5 supports independent AVDD and DVDD supplies (both 4.75 V–5.25 V), but they must remain within 0.3 V of each other at all times, including transients. This constraint is specified in Absolute Maximum Ratings and ensures proper isolation between analog and digital domains while allowing separate decoupling. VDRIVE may be set independently (2.7 V–5.25 V) to match host logic levels.

What sleep modes does the AD7492BRZ-5 support, and how are they selected?

The AD7492BRZ-5 supports two hardware-selectable sleep modes: partial sleep (250 µA max) and full sleep (1 µA max). Selection is made via the PS/FS pin - tied high for partial sleep (reference and oscillator remain active), or low for full sleep (all analog circuitry powered down). This behavior is explicitly defined in the Pin Function Descriptions and Operating Modes sections of the AD7492BRZ-5 datasheet.

Is the AD7492BRZ-5 pin-compatible with other variants in the AD7492 family?

Yes, the AD7492BRZ-5 is pin-compatible with AD7492BRZ and AD7492BRZ-4, all offered in 24-lead SOIC and TSSOP packages. Pin configuration (Figure 3) and function descriptions (Table 5) are identical across variants. Differences are limited to internal timing (e.g., 680 ns vs. 880 ns conversion time) and maximum throughput - no PCB redesign is needed when upgrading from AD7492BRZ to AD7492BRZ-5.