AD7892ARZ-3REEL

Overview

The AD7892ARZ-3REEL 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 600 kSPS with a conversion time of 1.47 µs and an acquisition time of 200 ns. The device features an internal +2.5 V reference and accepts a bipolar analog input range of ±2.5 V on the VIN1 pin. It provides both parallel and serial interface options for microprocessor connectivity, housed in a 24-lead SOIC package.

Feature Summary

• Integrated signal scaling allows direct handling of ±2.5 V analog inputs without external attenuation circuitry.
• Flexible interface architecture supports both high-speed parallel connections and three-wire serial communication modes.
• On-chip track/hold amplifier ensures accurate sampling at maximum throughput rates exceeding the Nyquist frequency.

Applications

• Portable instrumentation systems requiring low power consumption
• Industrial process control data acquisition
• Battery-powered measurement devices

Procurement Notes

Verify that the specific suffix 'ARZ-3' matches the required temperature range (-40°C to +85°C), accuracy class (±1 LSB relative accuracy), and input voltage range (±2.5 V). Confirm the REEL packaging designation aligns with automated assembly requirements before finalizing procurement orders.

Selection Notes

Select this component when a single-supply operation is required alongside a ±2.5 V input range. Ensure the system design accommodates the 600 kSPS throughput capability and utilizes the appropriate MODE pin configuration for either parallel or serial data retrieval based on available processor resources.

Part Context

This part belongs to the AD7892 family of fast, low-power ADCs. It shares architectural similarities with the AD7891 and AD7893 but is distinguished by its specific ±2.5 V input range variant and 600 kSPS speed rating. The device integrates essential functions like tracking, holding, and referencing into a compact form factor.

Replacement Considerations

AD7892BRZ-3REEL offers improved relative accuracy specifications while maintaining identical electrical performance and pinout compatibility.

FAQ

How is the standby mode activated?

Standby mode is activated by driving the STANDBY pin to a logic low state, which reduces typical power consumption to 5 mW.

What is the function of the REF OUT/REF IN pin?

This pin provides access to the internal +2.5 V reference or serves as the input for an external reference source to overdrive the internal reference.

How does the device handle overvoltage protection?

The AD7892-3 variant includes overvoltage protection on the analog inputs, allowing voltages up to ±7 V without damage.