AD7868BRZ-REEL

Specialized Overview

The AD7868BRZ-REEL is a complete 12-bit analog I/O system integrating a successive approximation ADC with track-and-hold and a buffered DAC. It operates from ±5 V supplies with an analog input/output range of ±3 V. The ADC achieves an 83 kHz throughput rate, while the DAC settles to within 0.5 LSB in 3 μs. Both converters utilize temperature-compensated 3 V buried Zener references. The device features serial interfaces for both ADC and DAC, minimizing pin count. It is housed in a 28-pin SOIC package and supports dynamic parameters including 72 dB SNR.

Specialized Feature Summary

• Integrates a 12-bit ADC with track-and-hold amplifier and a 12-bit DAC with output buffer on a single chip.
• Includes separate on-chip temperature-compensated 3 V buried Zener voltage references for precision biasing.
• Supports standard serial interfacing with asynchronous conversion control via CONVST and LDAC logic inputs.
• Specified for dynamic performance metrics such as signal-to-noise ratio and harmonic distortion.

Specialized Applications

• Digital Signal Processing
• Speech Recognition and Synthesis
• Spectrum Analysis
• High Speed Modems
• DSP Servo Control

Specialized Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. The BRZ designation indicates a 28-pin SOIC plastic package with industrial temperature specifications. Confirm that the REEL suffix matches the required tape and reel quantity for manufacturing integration. Ensure compatibility with existing supply voltages and serial interface timing requirements before finalizing procurement.

Specialized Selection Notes

Select this component when a compact solution requiring both analog input and output conversion is necessary. The integrated design reduces external component count by providing internal references and buffers. Verify that the 83 kHz throughput rate and 3 μs settling time meet system speed requirements. Ensure the ±3 V input/output range aligns with the application signal levels and that the serial interface protocol matches the host controller capabilities.

Specialized Part Context

The AD7868 belongs to Analog Devices' LC2MOS family of complete analog I/O systems. This family integrates ADCs, DACs, and references into small packages to simplify system design. The AD7868 specifically targets applications needing synchronized data acquisition and generation. It serves as a bridge between digital processing units and analog signals, consolidating functions that would otherwise require multiple discrete components.

Specialized Replacement Considerations

The AD7869 offers a 14-bit resolution variant within the same family. The AD7569 provides an 8-bit alternative with similar packaging options. Verify pinout compatibility and electrical specifications when substituting these parts. Check datasheets for differences in reference accuracy, throughput rates, and power consumption to ensure system performance remains adequate.