AD7862ARSZ-10

Overview

The AD7862ARSZ-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 total analog inputs. The device supports an input voltage range of ±10 V, achieving 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 differential nonlinearity, and ±4 LSB gain error. Power consumption is typically 60 mW in normal mode, reducing to 50 mW in power-saving mode.

Feature Summary

• Simultaneous sampling architecture preserves relative phase information between input channels using two track/hold amplifiers.
• Integrated internal +2.5 V reference eliminates the need for external components in standard configurations.
• High-speed parallel interface facilitates direct connection to microprocessors and digital signal processors.
• Overvoltage protection allows analog inputs to withstand voltages up to ±17 V without damage.

Applications

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

Procurement Notes

Verify the specific suffix 'ARSZ' corresponds to the SSOP package and industrial temperature range (-40°C to +85°C) as defined in the manufacturer's ordering guide. Confirm that the '-10' designation matches the required ±10 V input voltage range for the application. 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 to maintain phase coherence. Choose the AD7862ARSZ-10 specifically for applications requiring a ±10 V input range and surface-mount SSOP packaging. Consider the AD7863 if a 14-bit resolution upgrade is needed while maintaining pin compatibility.

Part Context

This part belongs to the AD7862 family of dual 12-bit ADCs. The 'AR' indicates a Small Outline Package (SOIC), while 'RS' denotes the Shrink Small Outline Package (SSOP). The 'Z' suffix signifies lead-free compliance. The '-10' variant is distinct from the '-3' (±2.5 V range) and '-2' (0 V to 2.5 V range) versions within the same series.

Replacement Considerations

The AD7863 serves as a 14-bit pin-compatible upgrade option within the same family. Other variants like AD7862AR-10 offer identical functionality but in a standard SOIC package rather than the shrink SSOP form factor.