Datasheet

0.00 0.08 0.16 0.24 0.32 0.40
40
50
60
70
80
90
100
CMRR (dB)
INP (V)
VDD=VREF=3.3V
2.9 3.0 3.1 3.2 3.3
60
70
80
90
100
110
120
CMRR (dB)
INP (V)
VDD=VREF=3.3V
INTEGRATED NOISE (500nV/DIV)
TIME (1s/DIV)
1 10 100 1k
-125
-100
-75
-50
-25
0
25
50
75
100
125
VOS
PH
(V)
OPL TIME (h)
INP=7/8VREF
INP=1/8VREF
-50 -25 0 25 50 75 100 125
90
95
100
105
110
PSRR (dB)
TEMPERATURE (°C)
INP=7/8 VREF
INP=1/8VREF
-50 -25 0 25 50 75 100 125
80
85
90
95
100
105
VDD=1.8V
VDD=3.3V
VDD=5V
LMP91200
www.ti.com SNAS571C –JANUARY 2012–REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, T
A
=25°C, V
S
=(VDD-GND)=3.3V, VREF=3.3V.
pH Buffer DC CMRR pH Buffer DC PSRR
vs. Temperature vs. Temperature
Figure 16. Figure 17.
pH Buffer Time domain Voltage Noise pH Buffer Input Offset Voltage Drift
Figure 18. Figure 19.
pH Buffer CMRR pH Buffer CMRR
vs. V
INP
- lower rail vs. V
INP
- upper rail
Figure 20. Figure 21.
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