AD876AR

Overview

The AD876AR is a CMOS, 10-bit, 20 MSPS analog-to-digital converter (ADC) from Analog Devices. It features an on-chip sample-and-hold amplifier and a multistage pipelined architecture with output error correction logic to guarantee no missing codes across the operating temperature range. The device operates on a single +5 V supply with a typical power dissipation of 160 mW, which can be reduced below 50 mW in standby mode. Digital I/Os are compatible with both +5 V and +3.3 V logic levels. It is housed in a 28-lead SOIC package and specified for commercial temperatures ranging from 0°C to +70°C.

Feature Summary

• Multistage pipelined architecture with output error correction logic ensures accurate performance and guarantees no missing codes over the full operating temperature range.
• On-chip input sample-and-hold amplifier simplifies driving requirements for high-speed applications.
• Force and sense connections to reference inputs minimize external voltage drops for improved accuracy.
• Digital I/O interfaces support both +5 V and +3.3 V logic families.

Applications

• Video and multimedia systems
• Imaging systems including color scanners, digital copiers, electronic still cameras, and camcorders
• High-speed data acquisition systems
• Communications equipment

Procurement Notes

Verify the specific suffix AR indicates the -40°C to +85°C industrial temperature range and 28-lead SOIC package when sourcing. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolescence notices or lifecycle changes directly from Analog Devices documentation before finalizing procurement plans.

Selection Notes

Select the AD876AR for designs requiring 10-bit resolution at 20 MSPS with low power consumption. Ensure the application supports single-supply +5 V operation. Consider the pin-compatible 8-bit option if prototype results allow for migration to lower resolution. Verify that the system clock and reference voltages align with the specified force-sense requirements for optimal dynamic performance.

Part Context

The AD876 series includes variants such as the AD876JR for commercial use and the AD876AR/ARS for industrial temperature ranges. The AD9200 serves as a pin-compatible alternative with lower power consumption but requires different supply configurations. The AD876 family is designed for space-saving surface mount packages like SOIC and TQFP.

Replacement Considerations

The AD9200 is a pin-compatible alternative offering lower power dissipation (80 mW) and operation between 2.7 V and 5.5 V. However, it requires careful attention to supply voltage differences and may have different dynamic performance characteristics compared to the AD876.