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MAX132ENG 18-Bit ADC with Serial Interface MaximIC
Maxim Integrated MaximIC
MAX132ENG Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
±18-Bit ADC with Serial Interface
__________________________________________Typical Operating Characteristics
ERROR vs. COMMON-MODE
INPUT VOLTAGE (VIN LO–AGND)
0.05
0 IN HI = IN LO
-0.05
-0.10
-0.15
-0.20
-0.25
-0.30
-4 -3 -2 -1 0 1 2 3 4
COMMON-MODE VOLTAGE (V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
50Hz/60Hz READ-ZERO OFFSET
vs. VREF
50Hz MODE
60Hz MODE
0.5
1.0
1.5
2.0
VREF (V)
50Hz/60Hz READ-ZERO OFFSET
vs. TEMPERATURE
1.6
1.4
60Hz MODE, VREF = 545mV
1.2
1.0
0.8
0.6
0.4
50Hz MODE, VREF = 655mV
0.2
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
140
120
100
80
60
40
20
0
-20
-40
0
SUPPLY CURRENT
vs. CRYSTAL FREQUENCY
V+
V-
50 100 150 200 250 300 350
CRYSTAL FREQUENCY (kHz)
FULL-SCALE ROLLOVER ERROR
vs. VREF
0.10
0.08
0.06
0.04
0.02
0
0
0.5 1.0 1.5 2.0 2.5
VREF (V)
NOISE vs. NUMBER
OF SAMPLES AVERAGED
20
15
10
5
0
0
10
20
30
40
50
NUMBER OF SAMPLES AVERAGED
______________________________________________________________Pin Description
PIN NAME
FUNCTION
CHIP SELECT Input has 3 functions: 1) When low, selects IC for communication; 2) on rising edge, loads
1
CS
input shift register data into one of the command registers; 3) on falling edge, loads data from one of the
output registers into the output shift register. When CS is high, DOUT is high impedance.
2
DIN
Serial Data In, D7 first bit in. Data is clocked into the register on the rising edge of SCLK.
3
DOUT Serial Data Out, D7 first bit out. Data is clocked out at the falling edge of SCLK. High impedance when CSis high.
4
SCLK
Serial Clock Input. On SCLK’s rising edge, data is shifted into the internal shift register through DIN. On
SCLK’s falling edge, data is clocked out of DOUT.
5
OSC2 Oscillator Output 2 is normally connected to a 32,768Hz crystal. Do not connect with external clock source.
6
OSC1 Oscillator Input 1 is normally connected to a 32,768Hz crystal, or may be connected to an external clock.
7
P0
User-programmable output bit 0—programmed through the serial port.
8
P1
User-programmable output bit 1—programmed through the serial port.
4 _______________________________________________________________________________________
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