AD7892BRZ-2

Overview

The AD7892BRZ-2 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from a single +5 V supply and achieves a throughput rate of 500 kSPS with a conversion time of 1.6 µs and track/hold acquisition time of 400 ns. The device features an internal +2.5 V reference, on-chip track/hold amplifier, and signal scaling for a unipolar input range of 0 V to +2.5 V. It supports both parallel and serial interfaces via a MODE pin and is housed in a 24-lead SOIC package.

Feature Summary

• Integrated signal scaling enables direct interfacing with 0 V to +2.5 V analog signals while operating from a single +5 V supply.
• Versatile interface logic allows selection between high-speed parallel data transfer or three-wire serial communication via the MODE pin.
• On-chip track/hold amplifier ensures accurate sampling at maximum throughput rates without external components.

Applications

• Portable instrumentation requiring low power consumption and single-supply operation
• Microprocessor-based data acquisition systems utilizing parallel bus connections
• Digital signal processing front-ends accepting unipolar voltage inputs

Procurement Notes

Verify the specific suffix '2' confirms the 0 V to +2.5 V input range and 500 kSPS speed. Confirm the 'RZ' designation indicates the SOIC-24 plastic package. Ensure the component meets RoHS compliance requirements for the intended assembly process. Cross-reference the manufacturer's ordering guide to validate availability against current production status.

Selection Notes

Select this model when a unipolar 0 V to +2.5 V input range is required. Choose over the -3 variant if a lower throughput rate of 500 kSPS is acceptable compared to its 600 kSPS capability. Consider the -1 variant if bipolar ±5 V or ±10 V inputs are needed instead. Verify that the system can accommodate the 1.6 µs conversion time and 400 ns acquisition period.

Part Context

The AD7892 series comprises fast, low-power 12-bit ADCs available in multiple input range variants. The BRZ-2 specifically targets applications requiring a unipolar 0 V to +2.5 V input window. It belongs to the broader AD7892 family which includes versions optimized for bipolar inputs and higher sampling speeds, all sharing the same core SAR architecture and interface capabilities.

Replacement Considerations

AD7892ARZ-2 offers the same electrical specifications in an SOIC-24 package. AD7892BN-2 provides equivalent performance in a PDIP-24 package. For higher throughput requirements, the AD7892BRZ-3 is a compatible alternative with a 600 kSPS rate and ±2.5 V input range.