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Data Sheet

ADAQ4216

GENERAL DESCRIPTION

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The ADAQ4216 is a µModule® precision data-acquisition (DAQ)

signal chain solution that reduces the development cycle of a preci-

sion measurement system by transferring the signal-chain design

challenge of component selection, optimization, and layout from

the designer to the device. With a guaranteed maximum ±3ppm

INL and no missing codes at 16 bits, the ADAQ4216 achieves

unparalleled precision from −40°C to +105°C.

Using system-in-package (SIP) technology, the ADAQ4216 com-

bines the common signal processing blocks required in a data-ac-

quisition solution in a small footprint, 14mm × 9mm, 0.8mm pitch,

178-ball CSP_BGA package.

The ADAQ4216 integrates the following:

►

A low-noise, high-bandwidth programmable gain instrumentation

amplifier (PGIA).

►

A second-order anti-aliasing filter.

►

A low-noise, low-distortion, high-bandwidth analog‐to‐digital con-

verter (ADC) driver.

►

A high precision 16-bit, 2MSPS successive approximation regis-

ter (SAR) ADC.

►

A 1.8V low dropout (LDO) regulator.

►

Performance critical passives.

The ADAQ4216 incorporates the critical passive components with

superior matching and drift characteristics using Analog Devices,

Inc., iPassives® technology to minimize temperature-dependent

error sources and to offer optimized performance. Integrating the

critical power supply and reference bypass capacitors reduce sen-

sitivity to the system level board layout. Reducing the solution

footprint enables addition of more functions within the system

and hence the smaller form factor instruments without sacrificing

performance.

The system integration solves many design challenges while the

µModule still provides the flexibility of a configurable PGIA, which

allows gain or attenuation and supporting the acquisition of differ-

ential or single-ended input signal. The fast settling of the PGIA

and ADC driver stage and no latency of the SAR ADC provide

a unique solution for high channel count, multiplexed signal chain

architectures, and control loop applications.

The digital features include Flexi-SPI serial-peripheral interface

(SPI), which allow data access by multiple SPI modes as well

as offset correction, gain adjustment, and averaging. The digital

features reduces the burden on the host processor. A wide-data

clocking window, multiple SDO lanes, and optional DDR data clock-

ing reduce the serial clock frequency while operating at full speed

of 2MSPS and make it easier to isolate the DAQ solution, which

reduces power dissipation and EMI. The echo clock mode and host

clock mode of the ADAQ4216 relax the timing requirements and

simplify the use of digital isolators.

The Flexi-SPI serial-user interface is compatible with 1.2V to 1.8V

using a separate VIO supply. The ADAQ4216 operation is specified

from −40°C to +105°C.

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