AD876JR

Overview

The AD876JR 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 full operating temperature range. The device operates on a single +5 V supply with power dissipation of 160 mW. It includes adjustable reference inputs with force and sense connections to minimize external voltage drops. Digital I/Os are compatible with +5 V or +3.3 V logic, and outputs feature three-state control. The component is housed in a 28-lead SOIC package and specified for commercial temperatures 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 interface design by handling high-speed signal acquisition internally.
• Adjustable reference inputs utilize force and sense connections to minimize external voltage drops and maintain conversion accuracy.
• Digital I/O interfaces support both +5 V and +3.3 V logic levels, providing flexibility for various system voltage requirements.

Applications

• Video and multimedia systems requiring high-speed data acquisition
• Imaging applications such as color scanners, digital copiers, electronic still cameras, and camcorders
• Charge coupled device (CCD) input systems
• High-speed portable applications benefiting from low power consumption

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with existing board layouts, particularly regarding the 28-lead SOIC footprint. Confirm that the required reference voltages and clock signals align with the device's electrical specifications before finalizing procurement decisions.

Selection Notes

Select this component when a 10-bit resolution at 20 MSPS is required within a single-supply +5 V environment. Consider the pin-compatible 8-bit option if prototype designs need migration flexibility. Evaluate the power-down mode capability if battery-operated applications demand standby power reduction below 50 mW. Ensure the application can accommodate the necessary external reference circuitry for optimal dynamic performance.

Part Context

The AD876 series represents a family of CMOS A/D converters designed for video and multimedia applications. The AD876JR specifically denotes the 10-bit version in a 28-lead SOIC package for commercial temperature ranges. It shares architectural similarities with other members like the AD876JSTZ but differs in package form factor. The series emphasizes low power consumption and high speed, making it suitable for space-constrained designs.

Replacement Considerations

The AD876JR-8 is a pin-compatible 8-bit variant within the same family. Designers may migrate from the 8-bit to the 10-bit version without changing the PCB layout if higher resolution is needed. Other pin-compatible options include the AD876AR and AD876ARS for extended temperature ranges.