Analog Devices ADAQ4381-4 quad-channel precision DAQ µModule reduces the development cycle of a precision measurement system by transferring the signal chain design challenges of component selection, optimization, and layout from the designer to the device. Using system-in-package (SiP) technology, the ADAQ4381-4 reduces end-system component count by combining multiple common signal processing and conditioning blocks into a single device. These blocks include:

• Quad-channel, high-resolution 14-bit, 4 MSPS simultaneous sampling SAR ADC
• Low-noise, fully differential ADC driver amplifier
• 3.3 V precision voltage reference
• Low-noise buffer amplifiers
• Low-dropout linear regulator

The ADAQ4381-4 has on-chip oversampling blocks to improve dynamic range and reduce noise at lower bandwidths. Oversampling can boost up to two bits of added resolution. It provides the flexibility of a configurable ADC driver feedback loop to allow four gain and attenuation adjustments and accepts both fully differential or single-ended to differential input configurations.

Using Analog Devices iPassives® technology, the ADAQ4381-4 incorporates critical passive components with superior matching and drift characteristics to minimize temperature-dependent error sources and to offer optimized signal chain performance. Housed in a small 8.0 mm x 8.0 mm x 0.8 mm pitch, 81-ball CSP/BGA package, the ADAQ4381-4 enables compact design without sacrificing performance and simplifies end-system bill of materials (BOM) management. Optimum performance is guaranteed with a single 5 V supply operation, and all required bypass and decoupling capacitors are included inside the package.

The conversion result can clock out simultaneously through 4-wire mode for faster throughput, or through 1-wire serial mode when slower throughput is allowed. The ADAQ4381-4 is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply, and it is specified to operate over a temperature range of -40°C to +105°C.

The EV-ADAQ4381-4FMCZ evaluation board enables simple evaluation of the ADAQ4381-4 14-bit DAQ µModule. This evaluation board demonstrates the performance of the ADAQ4381-4 and is a versatile tool for a variety of applications. It interfaces with the high-speed system demonstration SDP-H1 board (EVAL-SDP-CH1Z) through a 160-pin FMC connector.