AD1674BRZ

Overview

The AD1674BRZ is a monolithic 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features an onboard sample-and-hold amplifier (SHA), a 10 V reference, and three-state output buffers for microprocessor interfacing. The device operates with +5 V logic supply and ±12 V or ±15 V analog supplies. Key electrical parameters include a sampling rate of 100 kSPS, full power bandwidth of 1 MHz, and integral nonlinearity of ±0.5 LSB. It supports unipolar (0–10 V, 0–20 V) and bipolar (±5 V, ±10 V) input ranges.

Feature Summary

• Integrated SHA supporting full Nyquist bandwidth without wait-states
• Industry standard pinout compatible with AD574A and AD674A
• Flexible digital interface with 8- or 12-bit parallel data output
• Fully specified for AC and DC performance including THD and S/N+D

Applications

• Signal processing systems requiring high dynamic performance
• Traditional DC measurement applications
• Industrial control systems with dedicated input ports
• Data acquisition systems utilizing microprocessor interfaces

Procurement Notes

Verify the specific temperature grade and package configuration required for the application. The BRZ suffix indicates a plastic SOIC-28 package with RoHS compliance. Confirm availability through authorized distributors as stock levels vary. Ensure proper ESD precautions are taken during handling due to the sensitivity of the CMOS/BiMOS II process technology.

Selection Notes

Select the AD1674BRZ when industry-standard pin compatibility with legacy ADCs like the AD574A is required alongside improved speed. Choose this model for applications needing both AC and DC specifications guaranteed. Consider the operating temperature range of -40°C to +85°C for industrial environments. Evaluate power supply requirements (+5 V logic, ±12/15 V analog) against system constraints.

Part Context

The AD1674 series includes multiple grades (J, K, A, B, T) offering different temperature ranges and accuracy levels. The BRZ variant specifically denotes the commercial/industrial grade (-40°C to +85°C) in a plastic SOIC package. It is part of a family designed using BiMOS II process technology, combining bipolar analog circuitry with CMOS digital logic for high performance.

Replacement Considerations

The AD1674 is pin-compatible with the AD574A and AD674A. Direct replacements should maintain the same resolution, sampling rate, and interface logic. Verify that substitute components support the required input voltage ranges and power supply configurations.