AD7862ARSZ-3REEL

Overview

The AD7862ARSZ-3REEL 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 four analog input channels grouped into two selectable channels via the A0 pin. The device supports an input voltage range of ±2.5 V and includes overvoltage protection up to ±7 V. Key electrical parameters include a maximum conversion time of 3.6 μs, a throughput rate of 250 kSPS, and a typical power dissipation of 60 mW in normal mode. It utilizes a high-speed parallel interface and incorporates an internal +2.5 V reference.

Feature Summary

• Simultaneous sampling and conversion of two channels preserves relative phase information between signals.
• Integrated track/hold amplifiers ensure accurate acquisition of full-scale sine waves at maximum throughput rates.
• Automatic power-down mode reduces power consumption during idle periods, suitable for portable applications.
• High-speed parallel interface allows direct connection to microprocessors and digital signal processors.

Applications

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

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific version number corresponds to the required input voltage range, as the AD7862 series offers distinct variants for different analog input spans. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS process.

Selection Notes

Select this component when simultaneous sampling of two channels is required with a ±2.5 V input range. Compare against the AD7862-10 if a wider ±10 V input range is needed, or the AD7862-2 for unipolar 0 V to 2.5 V applications. Consider the AD7863 if a 14-bit resolution upgrade is necessary while maintaining pin compatibility.

Part Context

The AD7862 belongs to a family of high-speed, low-power dual ADCs fabricated using Linear Compatible CMOS (LC2MOS) technology. This mixed-signal process combines precision bipolar circuits with low-power CMOS logic. The device is available in multiple package options including SSOP, SOIC, and DIP, catering to various board space and thermal requirements.

Replacement Considerations

The AD7863 serves as a 14-bit pin-compatible upgrade within the same family. For alternative packages, the AD7862AR-3REEL represents the same functional device but in standard SOIC tube packaging instead of the reel format specified by the suffix.