AD7862BR-10REEL

Overview

The AD7862BR-10REEL is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, operating on a single +5 V supply. It features two independent ADCs with simultaneous sampling and conversion capabilities across four input channels grouped into two channels (A and B). The device includes an internal +2.5 V reference, track/hold amplifiers, and a high-speed parallel interface. Key electrical parameters include a maximum throughput rate of 250 kSPS, a conversion time of 3.6 μs, and a typical power dissipation of 60 mW in normal mode. The AD7862-10 variant supports a ±10 V bipolar input range with overvoltage protection up to ±17 V.

Feature Summary

• Simultaneous sampling and conversion of two channels preserves relative phase information between inputs.
• Integrated internal +2.5 V voltage reference eliminates the need for external components in standard applications.
• High-speed parallel data bus allows direct interfacing with microprocessors and DSPs.
• Automatic power-down mode reduces power consumption significantly after each conversion cycle.

Applications

• AC motor control systems requiring precise phase tracking.
• Uninterrupted power supplies (UPS) monitoring and data acquisition.
• Industrial data acquisition systems handling multiple analog signals.

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing. Confirm the '-10' designation matches the required ±10 V input range. Ensure the 'B' grade meets the specified -40°C to +85°C operating temperature requirements for your application environment.

Selection Notes

Select this component if simultaneous channel sampling is critical for phase-sensitive applications. Compare against the AD7863 if 14-bit resolution is needed, noting pin compatibility. Consider the AD7862-3 or AD7862-2 if the application requires ±2.5 V or unipolar 0–2.5 V input ranges respectively.

Part Context

The AD7862 belongs to Analog Devices' family of high-speed, low-power dual ADCs. It utilizes LC2MOS technology, combining precision bipolar circuits with CMOS logic. This part serves as a bridge between lower-resolution single-channel converters and higher-channel-count multiplexed systems, offering dedicated hardware for simultaneous sampling without software overhead.

Replacement Considerations

The AD7863 is a 14-bit pin-compatible upgrade within the same series. For unipolar applications, the AD7862-2 is available. For bipolar ±2.5 V ranges, the AD7862-3 is the appropriate variant. Verify that any replacement maintains the required 250 kSPS throughput and parallel interface timing specifications.