AD7884AP-REEL

Overview

The AD7884AP-REEL is a 16-bit monolithic analog-to-digital converter featuring an internal sample-and-hold amplifier and a conversion time of 5.3 µs. It achieves a maximum throughput rate of 166 kSPS using a two-pass flash architecture. The device supports ±5 V and ±3 V input ranges and operates from ±5 V supplies with a 3 V reference. It utilizes a 16-bit parallel data output structure controlled by CS, RD, and CONVST signals. Power dissipation is typically 250 mW. The component is housed in a 44-lead PLCC package and functions within a temperature range of -40 °C to +85 °C.

Feature Summary

• Monolithic construction utilizing a two-pass flash architecture for high-speed operation
• Internal sample-and-hold amplifier with asynchronous CONVST initiation
• Integrated on-chip 16-bit accurate DAC for error correction
• Supports selectable ±5 V or ±3 V analog input ranges

Applications

• Automatic Test Equipment
• Medical Instrumentation
• Industrial Control Systems
• Data Acquisition Systems
• Robotics

Procurement Notes

Verify the specific suffix AP against the manufacturer's ordering guide to confirm the 44-lead PLCC package and commercial temperature range. Ensure the REEL designation matches the required tape and reel quantity specifications for production integration. Cross-reference the datasheet revision E for any updates to absolute maximum ratings or thermal impedance values before finalizing procurement orders.

Selection Notes

Select this component when a 16-bit resolution and 166 kSPS throughput are required in a parallel interface configuration. The AD7884 differs from the AD7885 by providing a full 16-bit parallel output rather than a byte-read structure. Consider the power dissipation of 250 mW and the need for dual ±5 V supplies during system design. Verify that the external reference noise requirements align with the ADC's typical 120 µV rms noise specification.

Part Context

The AD7884 belongs to the LC2MOS family of high-speed sampling ADCs from Analog Devices. It is functionally paired with the AD7885, which offers identical performance but features an 8-bit byte-read interface. Both devices share the same internal architecture and timing characteristics, differing primarily in their digital output pin configurations and read control logic.

Replacement Considerations

The AD7885AAP is electrically equivalent to the AD7884AP regarding specifications but features an 8-bit byte-read interface instead of 16-bit parallel output. Direct substitution requires adapting the microprocessor interface logic to handle sequential byte reads rather than simultaneous word access.