AD7767BRUZ

Overview

The AD7767BRUZ is a single-channel, 24-bit oversampled successive approximation (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates with a 2.5 V supply and supports logic interfaces from 1.8 V to 3.6 V. The device provides an output data rate of 128 kSPS with a dynamic range of 109.5 dB and a signal-to-noise ratio of 108.5 dB at full-scale input. Power consumption is 15 mW during operation. It features a built-in low-pass FIR filter with linear phase response, ±7.6 ppm maximum integral nonlinearity, and zero error drift of 15 nV/°C. The component is housed in a 16-lead TSSOP package and functions within a temperature range of −40°C to +105°C.

Feature Summary

• Oversampled SAR architecture combined with an on-chip digital FIR filter for high DC accuracy and noise reduction.
• Flexible serial interface supporting multiple devices through synchronization and daisy-chain capabilities.
• Low power consumption optimized for battery-operated and portable data acquisition systems.
• Differential analog input structure providing common-mode rejection and ESD protection.

Applications

• Low power PCI and USB data acquisition systems
• Low power wireless acquisition systems
• Vibration analysis instrumentation
• High precision medical acquisition

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required packaging and environmental specifications. Confirm that the external reference voltage and logic levels match the system design requirements before procurement.

Selection Notes

Select this component when a balance of high resolution and moderate sampling speed is required. Consider the AD7767-1 or AD7767-2 variants if lower power consumption or higher dynamic range at reduced speeds is necessary. Ensure the application can accommodate the external reference voltage requirement.

Part Context

The AD7767 belongs to a family of high-performance 24-bit ADCs designed for ultralow power applications. It shares architectural similarities with the AD7766 series but offers distinct performance trade-offs regarding speed and power dissipation. The BRUZ designation indicates the industrial temperature grade and TSSOP package type.

Replacement Considerations

The AD7766BRUZ is a related device offering similar functionality with different decimation rates. Verify pinout compatibility and software configuration differences when substituting components within the same product family.

FAQ

What is the function of the SYNC/PD pin?

The SYNC/PD pin serves a dual purpose: it allows for the synchronization of multiple AD7767 devices and enables the device to enter a low-power down mode.

How does the device handle antialiasing?

The integrated on-chip digital FIR filter eliminates out-of-band noise, which reduces the requirement for external front-end antialiasing filters.

What is the recommended reference voltage?

The device nominally operates with a 5 V reference voltage applied to the VREF+ pin, though a 2.5 V reference can also be used.