AD7708BRUZ

Analog To Digital Converters (ADC) Overview

The AD7708BRUZ is a complete analog front-end for low-frequency measurement applications, featuring a 16-bit Sigma-Delta ADC with a programmable gain amplifier. It supports 4/5 fully-differential or 8/10 pseudo-differential input channels and operates from a single 3 V or 5 V supply. The device includes an on-chip oscillator requiring a 32.768 kHz crystal and provides simultaneous 50 Hz and 60 Hz rejection. It utilizes a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Analog To Digital Converters (ADC) Feature Summary

• Factory-calibrated architecture ensuring high accuracy without external calibration components
• VREF Select capability enabling both absolute and ratiometric measurement configurations
• Integrated rail-to-rail input buffer and programmable gain amplifier for direct transducer interfacing
• Software-selectable output data rates optimized for either analog performance or channel throughput

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• High-precision instrumentation
• Pressure transducers
• Portable battery-powered instrumentation
• Smart transmitters

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific package variant, as the BRU suffix denotes the TSSOP form factor while other suffixes indicate SOIC. Confirm that the required operating temperature range aligns with the B grade specification of -40°C to +85°C. Ensure the design accommodates the necessary external 32.768 kHz crystal for the internal oscillator circuit.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 16-bit resolution is sufficient for the application, offering a cost-effective alternative to the 24-bit AD7718. The pin-for-pin compatibility allows for potential future upgrades to higher resolution without hardware modifications. Consider the power consumption requirements, noting the typical normal mode current draw at the selected supply voltage.

Analog To Digital Converters (ADC) Part Context

This component belongs to the AD7708/AD7718 family of low-voltage, low-power analog-to-digital converters. It shares identical pinouts and functional blocks with the 24-bit AD7718, differing primarily in resolution. The family is designed for precision signal conditioning in environments requiring robust noise rejection and minimal external component count.

Analog To Digital Converters (ADC) Replacement Considerations

The AD7718BRUZ serves as a direct pin-compatible upgrade providing 24-bit resolution. For lower channel counts, the AD7709 series offers similar functionality with fewer inputs.