ADAS3023 Datasheet, PDF (1/32 Pages) Analog Devices – 16-Bit, 8-Channel Simultaneous Sampling Data Acquisition System

Data Sheet
16-Bit, 8-Channel Simultaneous
Sampling Data Acquisition System
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
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.
DIFF TO
COM
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
COM
FUNCTIONAL BLOCK DIAGRAM
VDDH AVDD DVDD VIO
RESET
PD
TRACK
AND
HOLD
PGIA
LOGIC/
INTERFACE
PulSAR
ADC
ADAS3023
BUF
REF
VSSH AGND DGND REFx
Figure 1.
CNV
BUSY
CS
SCK
DIN
SDO
REFIN
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
Input Range, VIN
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.
Rev. 0
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