AD7862ARZ-2REEL

Overview

The AD7862ARZ-2REEL is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, designed for simultaneous sampling applications. It operates on a single +5 V supply and features two independent ADC cores with integrated track/hold amplifiers. The device supports four single-ended analog inputs grouped into two channels, selectable via the A0 pin. This specific variant provides a unipolar input voltage range of 0 V to +2.5 V. Key electrical parameters include a maximum conversion time of 3.6 μs, a throughput rate up to 250 kSPS, and typical power dissipation of 60 mW in normal mode. It utilizes a high-speed parallel interface for data transfer.

Feature Summary

• Simultaneous sampling and conversion of two channels preserves relative phase information between signals.
• Integrated internal +2.5 V reference eliminates the need for external reference components in standard configurations.
• Overvoltage protection on analog inputs allows tolerance to voltages exceeding the nominal range without damage.
• Automatic power-down mode reduces power consumption significantly after each conversion cycle.

Applications

• AC motor control systems requiring precise phase measurement
• Uninterrupted power supplies (UPS) monitoring
• Data acquisition systems with multi-channel requirements

Procurement Notes

Verify that the ordering suffix 'REEL' confirms tape-and-reel packaging rather than tube packaging. Confirm the '-2' suffix indicates the 0 V to +2.5 V unipolar input range variant. Ensure the component meets RoHS compliance standards required for your assembly process. Check for moisture sensitivity level (MSL) ratings if lead-free soldering is mandated.

Selection Notes

Select this part when simultaneous sampling of two differential or single-ended signals is required within a 0 V to +2.5 V range. Consider the AD7862-10 or AD7862-3 if bipolar ±10 V or ±2.5 V input ranges are needed instead. Evaluate the 250 kSPS throughput against system timing constraints. Verify compatibility with the host microprocessor's parallel bus interface timing requirements.

Part Context

The AD7862 belongs to a family of high-speed, low-power dual ADCs from Analog Devices. It is fabricated using Linear Compatible CMOS (LC2MOS) technology. The device is available in multiple packages including SOIC, SSOP, and DIP. It serves as a pin-compatible upgrade path to the 14-bit AD7863 for applications requiring higher resolution.

Replacement Considerations

The AD7862ARZ-2 is a direct functional equivalent to the AD7862AR-2. For higher resolution needs, the AD7863 series offers 14-bit performance with pin compatibility. Other Analog Devices dual ADCs may require interface redesign due to differing pinouts or control logic.