Data Sheet

ADAQ4381-4

Quad, 14-Bit, 4 MSPS, Simultaneous Sampling, µModule Data Acquisition Solution

Rev. 0

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FEATURES

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Easy to use μModule® data acquisition system

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11× footprint reduction vs. discrete solution

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Integrated critical passive components

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5 V single-supply operation

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Guaranteed 14-bit no missing codes

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On-chip oversampling function

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2-bit resolution boost

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Out of range indicator (ALERT)

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INL: ±0.3 LSB typical, ±1 LSB maximum

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SNR (typical)

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85 dB at gain = 1.0, fIN = 1 kHz

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92.4 dB with OSR = ×8 at gain = 1.0, fIN = 1 kHz

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Channel-to-channel phase matching: 0.005° typical at

fIN = 20 kHz

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Integrated high precision reference, 3 ppm/oC typical drift

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Gain error: 0.003% typical

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Gain drift: 0.8 ppm/°C typical

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Integrated internal buffer with VCM generation

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Integrated fully differential ADC driver with signal scaling

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Wide input common-mode voltage range

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High common-mode rejection

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Single-ended to differential conversion

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Pin selectable input range with overrange

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Input ranges: ±2 V, ±3.3 V, ±5.5 V, ±11 V

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Gain/attenuation: G = 0.3, 0.6, 1.0, and 1.6

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High-speed serial interface

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8 mm x 8 mm, 0.8 mm pitch, 81-ball CSP_BGA package

APPLICATIONS

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Lab grade battery test system

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Motor control current sense

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Motor control position feedback

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Sonar

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Power quality monitoring

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Data acquisition system

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Erbium-doped fiber amplifier (EDFA) applications

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I and Q demodulation

GENERAL DESCRIPTION

The ADAQ4381-4 is a quad-channel precision data acquisition

(DAQ) signal chain μModule solution that 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 com-

mon signal processing and conditioning blocks into a single device.

These blocks include a quad-channel, high resolution 14-bit, 4

MSPS simultaneous sampling SAR ADC, low noise, fully differential

ADC driver amplifier, a 3.3 V precision voltage reference, low noise

buffer amplifiers, and low-dropout linear regulator.

The ADAQ4381-4 has on-chip oversampling blocks to improve dy-

namic range and reduce noise at lower bandwidths. The oversam-

pling 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 accept both fully differential

or single-ended to differential input configuration.

Using Analog Devices, Inc., 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 mm × 8 mm × 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 management. The ADAQ4381-4's optimum performance

is guaranteed with a single 5 V supply operation, all the required

bypass and decoupling capacitors are included inside the package.

The level of ADAQ4381-4 system integration solves many design

challenges, which enables a compact and simple solution for a

multichannel application.

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.

The ADAQ4381-4 is specified to operate over a temperature range

of −40°C to +105°C.

Table 1. µModule Data Acquisition Solutions

Type

500 kSPS

1 MSPS to 2 MSPS 4 MSPS

14-bit

ADAQ4381-4

16-bit

ADAQ7988

ADAQ4370-4

ADAQ7980

ADAQ4001

ADAQ4380-4

18-bit

ADAQ4003