ADAS3022 Datasheet, PDF (1/40 Pages) Analog Devices – 16-Bit, 1 MSPS, 8-Channel Data Acquisition System

Data Sheet
16-Bit, 1 MSPS, 8-Channel
Data Acquisition System
ADAS3022
FEATURES
Ease of use—16-bit, 1 MSPS complete data acquisition system
High impedance, 8-channel input: >500 MΩ
Differential input voltage range: ±24.576 V maximum
High input common-mode rejection: >100 dB
User-programmable input ranges
Channel sequencer with individual channel gains
On-chip 4.096 V reference and buffer
Auxiliary input—direct interface to PulSAR ADC inputs
No latency or pipeline delay (SAR architecture)
Serial 4-wire, 1.8 V to 5 V SPI-/SPORT-compatible interface
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
Instrumentation
GENERAL DESCRIPTION
The ADAS3022 is a complete 16-bit, 1 MSPS, successive approxi-
mation–based analog-to-digital data acquisition system, which is
manufactured on Analog Devices, Inc., proprietary iCMOS® high
voltage industrial process technology. The device integrates an
8-channel, low leakage multiplexer; a high impedance program-
mable gain instrumentation amplifier (PGIA) stage with high
common-mode rejection; a precision, low drift 4.096 V reference
and buffer; and a 16-bit charge redistribution analog-to-digital
converter (ADC) with successive approximation register (SAR)
architecture. The ADAS3022 can resolve eight single-ended
inputs or four fully differential inputs up to ±24.576 V when
using ±15 V supplies. In addition, the device can accept the
commonly used bipolar differential, bipolar single-ended,
pseudo bipolar, or pseudo unipolar input signals, as shown in
Table 1, thus enabling the use of almost any direct sensor
interface.
The ADAS3022 simplifies design challenges by eliminating
signal buffering, level shifting, amplification/attenuation,
common-mode rejection, settling time, and any other analog
signal conditioning challenge while allowing a smaller form
factor, faster time to market, and lower cost.
Table 1. Typical Input Range Selection
Signal
Input Range, VIN (V)
Differential
±1 V
±1.28 V
±2.5 V
±2.56 V
±5 V
±10.24 V
±10 V
±20.48 V
Single Ended¹
0 V to 1 V
±0.64 V
0 V to 2.5 V
±1.28 V
0 V to 5 V
±2.56 V
0 V to 10 V
±5.12 V
1 _{See Figure 59 and Figure 60 in the Analog Inputs section for more information.}
DIFF DIFF TO
PAIR
COM
IN0/IN1
IN2/IN3
IN4/IN5
IN6/IN7
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
COM
AUX+
AUX–
FUNCTIONAL BLOCK DIAGRAM
VDDH AVDD DVDD
VIO RESET
PD
ADAS3022
MUX
PGIA
LOGIC/
INTERFACE
PulSAR
ADC
TEMP
SENSOR
BUF
REF
VSSH AGND DGND REFx
Figure 1.
CNV
BUSY
CS
SCK
DIN
SDO
REFIN
Rev. A
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