AD7892BRZ-1

Overview

The AD7892BRZ-1 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from a single +5 V supply and consumes 60 mW typical power. The device features an on-chip track/hold amplifier, an internal +2.5 V reference, and versatile interface structures supporting both parallel and serial connections. It accepts analog input ranges of ±10 V or ±5 V with overvoltage protection up to ±17 V. The throughput rate is 500 kSPS, with a conversion time of 1.6 µs and acquisition time of 400 ns. It is housed in a 24-lead SOIC package.

Feature Summary

• Integrated signal scaling allows direct acceptance of ±10 V or ±5 V analog inputs while operating from a single +5 V supply.
• On-chip track/hold amplifier ensures accurate digitization of full-scale sine waves at maximum throughput rates.
• Flexible interface architecture supports both high-speed parallel and three-wire serial data output modes.
• Built-in overvoltage protection safeguards analog input ports against excessive voltage levels.

Applications

• Portable instrumentation systems requiring low power consumption
• Microprocessor-based data acquisition systems
• Digital signal processing front-ends

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the required RoHS compliance status and SOIC package variant. Confirm that the ordering code matches the intended temperature range and accuracy grade. Ensure compatibility with the host system's voltage levels and interface requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring a single-supply operation with integrated signal conditioning. The ±1 LSB relative accuracy makes it suitable for precision measurement tasks. Consider the available parallel or serial interface options based on the target microcontroller or DSP connectivity constraints.

Part Context

The AD7892 series comprises fast, low-power 12-bit ADCs designed for single-supply applications. The BRZ suffix indicates a lead-free, halogen-free RoHS-compliant version packaged in a 24-lead SOIC. This part belongs to a family offering various input ranges and throughput speeds to suit different system performance needs.

Replacement Considerations

Direct substitutes within the same family include AD7892ARZ-1REEL (SOIC, reel) and AD7892BNZ-1 (PDIP). Verify pinout compatibility and electrical specifications when replacing with other variants in the AD7892 series.

FAQ

What is the maximum overvoltage protection level for the AD7892-1?

The analog inputs of the AD7892-1 can withstand voltages up to ±17 V without damage.

How is the serial interface mode enabled?

The MODE pin must be tied to a logic low to select the serial interface mode.

What is the typical power consumption in normal operation?

The typical power consumption is 60 mW when operating from a single +5 V supply.