AD7779ACPZ-RL

Overview

The AD7779ACPZ-RL is an 8-channel, 24-bit simultaneous sampling analog-to-digital converter (ADC) from Analog Devices. It features a sigma-delta architecture with programmable gain amplifiers offering gains of 1, 2, 4, and 8 per channel. The device supports output data rates up to 16 kSPS in high resolution mode and includes a sample rate converter for coherent sampling. It operates on bipolar (±1.65 V) or unipolar (3.3 V) analog supplies and a 1.8 V to 3.6 V digital supply. Key performance metrics include a dynamic range of 108 dB at 16 kSPS, -109 dB THD, and ±7 ppm INL. It integrates a 12-bit SAR ADC for diagnostics and functions within a temperature range of –40°C to +105°C.

Feature Summary

• Eight independent sigma-delta channels provide simultaneous sampling with low DC input current for direct sensor connection.
• Integrated sample rate converter enables fine-resolution control over the output data rate to maintain coherency with line frequency changes.
• Dual-mode operation allows selection between high resolution and low power modes to optimize power dissipation versus dynamic range.
• Built-in 12-bit SAR ADC facilitates system and chip diagnostics without decommissioning measurement channels.

Applications

• Circuit breakers
• General-purpose data acquisition
• Electroencephalography (EEG)
• Industrial process control

Procurement Notes

Verify the specific suffix 'RL' indicates reel packaging when placing orders. Confirm that the LFCSP-64 package requires appropriate PCB thermal management due to power dissipation characteristics. Ensure voltage rails match the specified bipolar or unipolar requirements before integration.

Selection Notes

Select this component for applications requiring multi-channel simultaneous sampling with high precision. Consider the high resolution mode for maximum dynamic range or low power mode for reduced consumption. Verify that the required output data rate aligns with the available decimation rates and clock frequencies supported by the internal filters.

Part Context

This part belongs to the AD777x family of high-performance data converters. It shares architectural similarities with the AD7770 and AD7771 but offers distinct channel counts and feature sets tailored for different industrial and medical sensing requirements within the Analog Devices portfolio.

Replacement Considerations

The AD7770ACPZ-RL serves as a functional substitute within the same series, though it may differ in specific channel configurations or integrated reference options. Verify pin compatibility and register mapping before swapping components in existing designs.