Datasheet
Temperature( C)°
-50 15010075 1250-25 5025
40
35
30
25
20
15
10
5
0
InputBiasCurrent,Pull-UpEnabled(nA)
Temperature( C)°
-50 15010075 1250-25 5025
900
800
700
600
500
400
300
200
100
0
InputBiasCurrent(pA)
Temperature( C)°
-50 15010075 125-25 50250
0.6
0.5
0.4
0.3
0.2
0.1
0
ErrorfromIdealValue(%)
+11mVOffsetAdjust
-10mVOffsetAdjust
+51mVto+99mVOffsetAdjust
- -100mVOffsetAdjust50mVto
Temperature(°C)
-50 15010075 1250
3s
3s
-25 5025
50
40
30
20
10
0
-10
-20
-30
-40
OutputVoltage( V)m
ThreeTypicalUnitsShown
Unit1
Unit2
Unit3
V
OUT
(500mV/div)
0V
0V
Time(2s/div)
CoarseOffset=0V
CoarseOffset=2.5mV
Frequency(Hz)
100 1k 10k 100k
1
0.1
0.01
RTFFront-EndNoise( V/ )m ÖHz
Offset=100mV,G=4x1x1
Offset=40mV,G=100x1x1
Offset=100mV,G=32x1x1
Offset=0V,G=4x1x1
Offset=0V,G=1600x1x1
Offset=0V,G=100x1x1
Offset=0V,G=32x1x1
Clock
Feed-
through
PGA308
www.ti.com
SBOS440B –JULY 2008–REVISED DECEMBER 2010
TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
S
= V
REF
= D
OUT
/V
CLAMP
= +5V, R
L
= 10kΩ and C
L
= 100pF connected to GND, unless otherwise noted.
Gain format is presented: G = FE-PGA × Fine Gain × Output Gain.
FRONT-END PGA INPUT BIAS CURRENT FRONT-END PGA INPUT BIAS CURRENT
WITH I
PU
ENABLED vs TEMPERATURE WITH I
PU
DISABLED vs TEMPERATURE
Figure 1. Figure 2.
COARSE OFFSET ADJUST ERROR vs FRONT-END PGA OFFSET VOLTAGE vs
TEMPERATURE TEMPERATURE
Figure 3. Figure 4.
0.1Hz TO 10Hz OUTPUT NOISE INPUT-REFERRED FRONT-END NOISE vs
(G = 1600) FREQUENCY
Figure 5. Figure 6.
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