AD7862ARS-10

Overview

The AD7862ARS-10 is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, housed in a 28-lead Shrink Small Outline Package (SSOP). It operates on a single +5 V supply and features two simultaneous sampling channels with four analog inputs. The device supports an input voltage range of ±10 V and achieves a throughput rate of 250 kSPS with a conversion time of 3.6 μs. Key electrical specifications include a typical signal-to-noise ratio of 70 dB, ±1 LSB relative accuracy, and ±4 LSB gain error. It integrates an internal +2.5 V reference and offers overvoltage protection up to ±17 V.

Feature Summary

• Simultaneous sampling and conversion of two independent channels to preserve relative phase information between signals.
• Integrated high-speed parallel interface compatible with microprocessors and digital signal processors.
• Built-in automatic power-down mode that activates after conversion completion to minimize energy consumption.
• Robust analog input stage featuring overvoltage protection capable of withstanding voltages significantly beyond the operating range.

Applications

• AC motor control systems requiring precise phase tracking.
• Uninterrupted power supplies (UPS) for real-time monitoring.
• Data acquisition systems needing multi-channel synchronization.
• Communications equipment utilizing high-speed signal processing.

Procurement Notes

Verify the specific ordering suffix 'ARS' corresponds to the 28-lead Shrink Small Outline Package (RS-28) and the extended temperature rating if required. Confirm the '-10' suffix indicates the ±10 V input range variant. Ensure compatibility with the 28-pin SSOP footprint during PCB layout. Check current manufacturing status as this component may be subject to obsolescence notices.

Selection Notes

Select the AD7862ARS-10 when simultaneous sampling of two channels is critical for maintaining signal phase relationships. Choose this part for applications requiring a ±10 V input range without external attenuation circuitry. Consider the SSOP package for space-constrained designs where shrink outline dimensions are preferred over standard SOIC or DIP formats.

Part Context

This component belongs to the AD7862 family of dual 12-bit ADCs. It shares architectural similarities with the AD7863, which serves as a 14-bit pin-compatible upgrade. The 'ARS' designation specifically identifies the Shrink Small Outline Package variant within the broader product line that also includes standard SOIC and DIP options.

Replacement Considerations

The AD7863 is a 14-bit pin-compatible upgrade option. Other variants in the series include AD7862AR-10 and AD7862BR-10 for different package types or temperature grades.