AD7862ANZ-10

Overview

The AD7862ANZ-10 is a dual 12-bit analog-to-digital converter operating from a single +5 V supply. It features two simultaneous sampling channels with a throughput rate of 250 kSPS and a conversion time of 3.6 μs. The device accepts an analog input range of ±10 V with overvoltage protection up to ±17 V. It includes an internal +2.5 V reference, track/hold amplifiers, and a high-speed parallel interface. Key specifications include a signal-to-noise ratio of 70 dB min, total harmonic distortion of -78 dB max, and typical power dissipation of 60 mW in normal mode.

Feature Summary

• Simultaneous sampling and conversion of two independent channels preserves relative phase information between inputs.
• Integrated track/hold amplifiers ensure accurate acquisition of full-scale sine waves at maximum throughput rates.
• Built-in overvoltage protection allows analog inputs to withstand voltages significantly higher than the operating range without damage.
• Automatic power-down mode reduces power consumption after each conversion cycle, supporting battery-powered applications.

Applications

• AC motor control systems requiring precise phase measurement
• Uninterrupted power supplies (UPS) monitoring
• Data acquisition systems for industrial instrumentation
• Communications equipment signal processing

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the base model designation does not indicate the physical housing. Confirm the temperature grade aligns with operational requirements, noting that standard versions cover commercial ranges while extended grades support wider thermal environments. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS process technology used in fabrication.

Selection Notes

Select the AD7862ANZ-10 when a ±10 V input range is required, distinguishing it from the ±2.5 V or unipolar variants. Consider the 28-lead Plastic DIP package for through-hole mounting needs. Evaluate the need for simultaneous sampling versus sequential sampling alternatives if channel isolation or aperture delay matching is critical for the specific application timing constraints.

Part Context

This component belongs to the AD7862 family of dual ADCs, which also includes versions with different input ranges and pin-compatible upgrades like the AD7863. The 'AN' suffix denotes the 28-lead Plastic DIP package, while 'Z' indicates lead-free compliance. The '-10' variant specifically defines the ±10 V bipolar input capability, setting it apart from the lower voltage options within the same product line.

Replacement Considerations

The AD7863 is a 14-bit pin-compatible upgrade offering higher resolution. For direct functional substitution within the same resolution class, verify availability of other AD7862 variants with matching input ranges and package styles. Cross-reference timing characteristics and power specifications to ensure compatibility with existing system interfaces and thermal management designs.