AD7720BRU

ADCs/DACs - Special Purpose Overview

The AD7720BRU is a 16-bit, single-channel CMOS Sigma-Delta modulator from Analog Devices. It operates on a +5 V supply and converts analog signals into a high-speed 1-bit data stream. The device features an internal 2.5 V reference and supports differential inputs with ranges of 0 V to +2.5 V (unipolar) or ±1.25 V (bipolar). Key specifications include a 12.5 MHz master clock frequency, 90 dB dynamic range, and operation within the -40 °C to +85 °C temperature range. It is housed in a 28-lead TSSOP package.

ADCs/DACs - Special Purpose Feature Summary

• 16-bit resolution with 90 dB dynamic range
• Internal 2.5 V voltage reference with external option
• Differential input support for unipolar and bipolar modes
• Single-bit output stream compatible with digital filters

ADCs/DACs - Special Purpose Applications

• High-resolution data acquisition systems
• Industrial process control instrumentation
• Precision measurement equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix RU against the required package type, which is the 28-lead Thin Shrink Small Outline Package. Confirm that the B version meets the industrial operating temperature range of -40 °C to +85 °C. Ensure compatibility with the +5 V power supply requirements specified in the datasheet.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a 16-bit resolution and high sampling speed are required. The internal reference simplifies design but requires verification if higher precision is needed via an external reference. Ensure the driving circuit can handle the switched capacitor input impedance at the selected clock frequency.

ADCs/DACs - Special Purpose Part Context

The AD7720BRU belongs to the AD7720 series of sigma-delta modulators. It is designed to interface directly with digital filters to reconstruct the original analog information. The device eliminates the need for external sample-and-hold circuits by continuously sampling the analog input.

ADCs/DACs - Special Purpose Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio that offer similar resolution and clock speeds. Verify that any substitute maintains the same 28-lead TSSOP footprint and +5 V supply requirement.