AD7872BRZ

Overview

The AD7872BRZ is a complete monolithic 14-bit analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from ±5 V power supplies and accepts bipolar input signals within the ±3 V range. The device features an internal track-and-hold amplifier, a successive approximation register (SAR), and a laser-trimmed 3 V buried Zener reference. It provides a serial digital interface with a throughput rate of 83 kSPS and a typical data access time of 57 ns. Dynamic performance includes a signal-to-noise ratio (SNR) of 80 dB at a 10 kHz input frequency. Power dissipation is typically 50 mW.

Feature Summary

• Integrated 14-bit SAR architecture with on-chip clock oscillator and 3 V reference
• Serial data output format compatible with standard microprocessors and DSPs
• High-speed track-and-hold amplifier supporting full-power signal conversion up to 41.5 kHz

Applications

• Digital signal processing systems
• High-speed modem applications
• Speech recognition and synthesis equipment
• Spectrum analysis instruments
• DSP servo control loops

Procurement Notes

Verify that the ordering suffix BRZ corresponds to the industrial temperature range of −40°C to +85°C. Confirm package compatibility with the 16-pin SOIC footprint. Ensure supply voltages are strictly maintained at ±5 V ± 5% for specified performance. Check datasheet revision F for updated integral nonlinearity parameters.

Selection Notes

Select the AD7872BRZ when a dedicated serial interface is required instead of parallel or byte modes. This part is suitable for designs needing high dynamic accuracy with low component count. Verify that the single-ended input requirement matches the system signal source. Consider the 57 ns access time for bus timing constraints.

Part Context

The AD7872BRZ belongs to the AD7871/AD7872 family of fast, complete 14-bit sampling ADCs. While the AD7871 offers parallel and byte interfaces, the AD7872 is restricted to serial output only. Both devices share identical core specifications, including resolution, power consumption, and dynamic performance metrics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.