AD7780BRUZ-REEL

Overview

The AD7780BRUZ-REEL is a 24-bit Sigma-Delta analog-to-digital converter in a 16-lead TSSOP package. It features pin-programmable gain (1 or 128) and filter response (10 Hz or 16.7 Hz). The device operates on a 2.7 V to 5.25 V supply with typical current consumption of 115 μA at Gain 1 and 330 μA at Gain 128. It includes an internal oscillator, bridge power-down switch, and a 2-wire serial interface.

Feature Summary

• Pin-programmable gain selection between unity and 128 for flexible sensor interfacing
• Integrated low-side bridge power-down switch for battery life optimization
• Internal clock oscillator eliminates the need for external timing components
• Simultaneous 50 Hz and 60 Hz line frequency rejection capabilities

Applications

• Weigh scales
• Pressure measurement
• Industrial process control
• Portable instrumentation

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors. Confirm the specific REEL suffix indicates tape-and-reel packaging suitable for automated assembly processes. Ensure the ordering information matches the required TSSOP-16 package variant.

Selection Notes

Select this component for applications requiring ultralow power consumption and high-resolution data acquisition from bridge sensors. Consider the pin-programmable nature of the gain and filter settings when designing the hardware schematic to ensure proper logic level configuration.

Part Context

This part belongs to the AD7780 family of ultralow power sigma-delta ADCs manufactured by Analog Devices Inc. It is specifically designed as a complete front-end solution for bridge sensor products, integrating precision amplification and filtering within a single compact integrated circuit package.

Replacement Considerations

Check for availability of the tube-packaged AD7780BRUZ if reel quantities are not required. Verify compatibility with alternative 24-bit ADCs only if pin configurations and electrical specifications align precisely with system requirements.

FAQ

How is the gain configured on the AD7780?

The gain is set via the dedicated GAIN pin. A low logic level selects a gain of 128, while a high logic level selects a gain of 1.

What is the function of the BPDSW pin?

The BPDSW pin controls an internal low-side power switch that disconnects the bridge sensor from the excitation voltage when PDRST is low, minimizing power consumption.

Does the AD7780 require an external clock?

No, the AD7780 contains an internal clock oscillator, removing the need for external timing components.