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MAX1452
Low-Cost Precision Sensor
Signal Conditioner
5
Maxim Integrated
Typical Operating Characteristics
(VDD = +5V, TA = +25°C, unless otherwise noted.)
PIN
SSOP/TSSOP
TQFN-EP
NAME
FUNCTION
1
ISRC
Bridge Drive Current Mode Setting
2
OUT
High ESD and Scan Path Output Signal. May need a 0.1F capacitor, in
noisy environments. OUT may be parallel connected to DIO.
33
VSS
Negative Supply Voltage
4
INM
Bridge Negative Input. Can be swapped to INP by configuration register.
5
BDR
Bridge Drive
6
INP
Bridge Positive Input. Can be swapped to INM by configuration register.
77
VDD
Positive Supply Voltage. Connect a 0.1F capacitor from VDD to VSS.
—
8, 9, 13, 16, 20, 22,
23, 24
N.C.
No Connection. Not internally connected; leave unconnected (TQFN
package only).
8
10
TEST
Internally Connected. Connect to VSS.
Pin Description
OFFSET DAC DNL
MAX1452
toc01
DAC CODE
DNL
(mV)
0
30k
40k
10k
20k
50k
60k
70k
5.0
2.5
0
-2.5
-5.0
5.0
2.5
0
-2.5
-5.0
AMPLIFIER GAIN NONLINEARITY
MAX1452
toc02
INPUT VOLTAGE [INP - INM] (mV)
OUTPUT
ERROR
FROM
STRAIGHT
LINE
(mV)
-50
0
-40 -30 -20 -10
10 20 30
40
50
ODAC = 6250hex
OTCDAC = 0
FSODAC = 4000hex
FSOTCDAC = 8000hex
PGA INDEX = 0
IRO = 2
OUTPUT NOISE
MAX1452
toc03
400
μs/div
C = 4.7
μF, RLOAD = 1kΩ
OUT
10mV/div