AD7892BNZ-3

Overview

The AD7892BNZ-3 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in Analog Devices' LC2MOS process. It operates from a single +5 V supply and achieves a throughput rate of 600 kSPS with a conversion time of 1.47 µs. The device features an internal +2.5 V reference, a track/hold amplifier, and flexible serial or parallel interfaces. It accepts a ±2.5 V analog input range and includes overvoltage protection up to ±7 V on the analog inputs. The component is housed in a 24-lead plastic DIP package and supports operation within a temperature range of -40 °C to +85 °C.

Feature Summary

• Integrated signal scaling allows direct handling of bipolar analog signals using a single positive supply voltage.
• On-chip versatile interface structures support both high-speed parallel connections and three-wire serial communication protocols.
• Built-in overvoltage protection safeguards analog input ports against transient voltage spikes exceeding standard operating ranges.

Applications

• Industrial data acquisition systems requiring high-speed sampling
• Portable instrumentation powered by single-supply batteries
• Digital signal processing front-ends for audio and vibration analysis

Procurement Notes

Verify the specific suffix 'BNZ-3' against official manufacturer documentation to confirm the exact pinout configuration, accuracy class, and packaging specifications. Ensure that the required ±2.5 V input range aligns with the target application's signal levels before finalizing procurement decisions.

Selection Notes

Select this model when a 600 kSPS sampling rate and 12-bit resolution are required for bipolar signals. Consider the integrated reference and track/hold amplifier to reduce external component count. Verify compatibility with the system's microprocessor interface requirements, as the device supports both parallel and serial modes via the MODE pin.

Part Context

This component belongs to the AD7892 family of single-supply ADCs. The 'B' designation indicates a relative accuracy of ±1 LSB, while the 'N' suffix specifies the plastic DIP package. The '-3' variant specifically defines the ±2.5 V input range and 600 kSPS throughput capability, distinguishing it from other variants in the series.

Replacement Considerations

Direct functional substitutes within the same family include the AD7892ANZ-3 for lower accuracy requirements or the AD7892BRZ-3 for surface mount applications. Cross-family replacements require careful evaluation of pin compatibility, power consumption, and interface timing constraints.