MAX132CWG Datasheet Download

Part No.:
MAX132CWG
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Download Datasheet
Description:
[【18-Bit ADC with Serial Interface]
File Size:
130 K
Page:
16 Pages
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Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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19-0009; Rev 2; 8/95
ANUAL
N KIT M EET
ATIO
SH
EVALU
S DATA
OLLOW
F
±18-Bit ADC with Serial Interface
____________________________Features
o
Low Supply Current:
60µA (Normal Operation)
1µA (Sleep-Mode Operation)
o
±0.006% FSR Accuracy at 16 Conv/sec
o
Low Noise: 15µV
RMS
o
Serial I/O Interface with Programmed Output for
Mux and PGA
o
Performs up to 100 Conv/sec
o
±2pA Input Current
o
50Hz/60Hz Rejection
_______________General Description
The MAX132 is a CMOS, 18-bit plus sign, serial-output,
analog-to-digital converter (ADC). Multi-slope integra-
tion provides high-resolution conversions in less time
than standard integrating ADCs, allowing operation up
to 100 conversions per second. Low conversion noise
provides guaranteed operation with ±512mV full-scale
input range (2µV/LSB). A simple 4-wire serial interface
connects easily to all common microprocessors, and
twos-complement output coding simplifies bipolar mea-
surements. Typical supply current is only 60µA and is
reduced to 1µA in sleep mode. Four serially pro-
grammed digital outputs can be used to control an
external multiplexer or programmable-gain amplifier.
The MAX132 comes in 24-pin narrow DIP and wide SO
packages, and is available in commercial and extend-
ed temperature grades.
High resolution, compact size, and low power make this
device ideal for data loggers, weigh scales, data-acqui-
sition systems, and panel meters.
MAX132
______________Ordering Information
PART
MAX132CNG
MAX132CWG
MAX132C/D
MAX132ENG
MAX132EWG
MAX132MRG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 Wide SO
Dice*
24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP**
________________________Applications
Remote Data Acquisition
Battery-Powered Instruments
Industrial Process Control
Transducer-Signal Measurement
Pressure, Flow, Temperature, Voltage
Current, Resistance, Weight
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
________________Functional Diagram
__________________Pin Configuration
TOP VIEW
CREF-
CS
SCLK
EOC
DIN
DOUT
CREF+
V+
602k
+5V
CS 1
DIN 2
DOUT 3
24 V+
23 BUF OUT
22 INT OUT
21 INT IN
BUF OUT
INT OUT
INT IN
REF+
REF-
4.7nF
SCLK 4
OSC2 5
OSC1 6
P0 7
±512mV INPUT
P1 8
P2 9
P3 10
EOC 11
DGND 12
MAX132
20 CREF-
19 CREF+
18 REF+
17 REF-
16 AGND
15 IN LO
14 IN HI
13 V-
MAX132
P0
P1
P2
P3
OSC1
AGND
IN LO
IN HI
V-
DGND
OSC2
-5V
DIP/SO
________________________________________________________________
Maxim Integrated Products
1
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