AD7862BRZ-10

Overview

The AD7862BRZ-10 is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices. It features two simultaneous sampling channels with four single-ended analog inputs grouped into Channel A and Channel B, selectable via the A0 pin. Operating from a single +5 V supply, it delivers a throughput rate of 250 kSPS with a conversion time of 3.6 μs and an acquisition time of 0.3 μs. The device supports an input voltage range of ±10 V, utilizes a high-speed parallel interface, and includes an internal +2.5 V reference. Key performance metrics include a signal-to-noise ratio of 70 dB minimum, ±1 LSB relative accuracy, and ±1 LSB differential nonlinearity.

Feature Summary

• Simultaneous sampling and conversion of two independent channels to preserve relative phase information between signals.
• Integrated track/hold amplifiers with tight aperture delay matching for accurate high-frequency signal capture.
• Internal +2.5 V voltage reference with provision for external reference connection.
• Overvoltage protection on analog inputs allowing tolerance beyond the specified operating range.

Applications

• AC motor control systems
• Uninterrupted power supplies (UPS)
• Data acquisition systems
• Communications equipment

Procurement Notes

Verify the specific suffix '-10' confirms the ±10 V bipolar input range variant. Confirm the 'BRZ' designation indicates the RoHS-compliant SOIC-28 package version. Cross-reference the manufacturer's ordering guide to ensure compatibility with required temperature ranges and packaging formats before finalizing procurement.

Selection Notes

Select this component when simultaneous sampling of two channels is required within a single package. Ensure the system operates from a single +5 V supply. Verify that the ±10 V input range matches the application signal levels. Consider the parallel interface requirements for the host microprocessor or DSP.

Part Context

The AD7862 belongs to Analog Devices' family of high-speed, low-power dual ADCs. It is pin-compatible with the 14-bit AD7863, allowing for potential upgrades in resolution without board redesign. The device is fabricated using Linear Compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7863 serves as a 14-bit pin-compatible upgrade option. Other variants in the series include AD7862AR-10 and AD7862AN-10, differing primarily in package type and temperature rating.