MAX132 Maxim, MAX132 Datasheet
MAX132
Manufacturer Part Number
MAX132
Description
18-Bit ADC with Serial Interface
Manufacturer
Maxim
Datasheet
1.MAX132.pdf
(16 pages)
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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.
________________________Applications
19-0009; Rev 2; 8/95
Call toll free 1-800-998-8800 for free samples or literature.
________________Functional Diagram
_______________General Description
Remote Data Acquisition
Battery-Powered Instruments
Industrial Process Control
Transducer-Signal Measurement
CS
SCLK
EOC
DIN
DOUT
P0
P1
P2
P3
Pressure, Flow, Temperature, Voltage
Current, Resistance, Weight
CREF-
OSC1
________________________________________________________________ Maxim Integrated Products
MAX132
CREF+
OSC2
BUF OUT
INT OUT
DGND
INT IN
AGND
REF+
IN LO
REF-
IN HI
V+
V-
±18-Bit ADC with Serial Interface
602k
4.7nF
+5V
-5V
±512mV INPUT
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
____________________________Features
__________________Pin Configuration
______________Ordering Information
MAX132CNG
MAX132CWG
MAX132C/D
MAX132ENG
MAX132EWG
MAX132MRG
Low Supply Current:
±0.006% FSR Accuracy at 16 Conv/sec
Low Noise: 15µV
Serial I/O Interface with Programmed Output for
Mux and PGA
Performs up to 100 Conv/sec
±2pA Input Current
50Hz/60Hz Rejection
60µA (Normal Operation)
1µA (Sleep-Mode Operation)
TOP VIEW
PART
DGND
DOUT
OSC2
OSC1
SCLK
EOC
DIN
CS
P0
P1
P2
P3
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
10
11
12
1
2
3
4
5
6
7
8
9
RMS
MAX132
DIP/SO
24 Narrow Plastic DIP
24 Wide SO
Dice*
24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP**
PIN-PACKAGE
24
23
22
21
20
19
18
17
16
15
14
13
V+
BUF OUT
INT OUT
INT IN
CREF-
CREF+
REF-
AGND
IN LO
V-
REF+
IN HI
1
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