16-Bit, 8-Channel Simultaneous

Sampling Data Acquisition System

Data Sheet

ADAS3023

FEATURES

Ease-of-use, 16-bit complete data acquisition system

Simultaneous sampling selection of 2, 4, 6, and 8 channels

Differential input voltage range: ±20.48 V maximum

High impedance 8-channel input: >500 MΩ

High input common-mode rejection: 95.0 dB

User-programmable input ranges

On-chip 4.096 V reference and buffer

No latency/pipeline delay (SAR architecture)

Serial 4-wire 1.8 V to 5 V SPI-/SPORT-compatible interface

40-lead LFCSP package (6 mm × 6 mm)

−40°C to +85°C industrial temperature range

APPLICATIONS

Multichannel data acquisition and system monitoring

Process control

Power line monitoring

Automated test equipment

Patient monitoring

Spectrum analysis

Instrumentation

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

GENERAL DESCRIPTION

The ADAS3023 is a complete 16-bit successive approximation-

based analog-to-digital data acquisition system. This device is

capable of simultaneously sampling up to 500 kSPS for two

channels, 250 kSPS for four channels, 167 kSPS for six chan-

nels, and 125 kSPS for eight channels manufactured on the Analog

Devices, Inc., proprietary iCMOS® high voltage industrial process

technology.

The ADAS3023 integrates eight channels of low leakage track

and hold, a programmable gain instrumentation amplifier

(PGIA) stage with a high common-mode rejection offering four

differential input ranges, a precision low drift 4.096 V reference

and buffer, and a 16-bit charge redistribution successive approxi-

mation register (SAR) analog-to-digital converter (ADC). The

ADAS3023 can resolve differential input ranges of up to ±20.48 V

when using ±15 V supplies.

The ADAS3023 simplifies design challenges by eliminating

signal buffering, level shifting, amplification and attenuation,

common-mode rejection, settling time, or any of the other

analog signal conditioning challenges, yet allows for smaller

form factor, faster time to market, and lower costs.

The ADAS3023 is factory calibrated and its operation is

specified from −40°C to +85°C.

Table 1. Typical Input Range Selection

Single-Ended Signals1

0 V to 1 V

±1.28 V

0 V to 2.5 V

±2.56 V

0 V to 5 V

±5.12 V

0 V to 10 V

±10.24 V

1

See Figure 39 and Figure 40 in the Analog Inputs section for more

information.

BUF

REF

LOGIC/

INTERFACE

TRACK

AND

HOLD

PGIA

PulSAR

ADC

DIFF TO

COM

IN0

CNV

CS

SCK

DIN

SDO

REFIN

BUSY

IN1

IN2

IN3

IN4

IN5

IN6

IN7

COM

VDDH AVDD DVDD

VIO

RESET

REFx

DGND

AGND

VSSH

PD

ADAS3023

Rev. 0

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