Datasheet

Average
4.090
4.085
4.080
4.075
4.070
4.065
4.060
Temperature ( C)°
-55 -35 -15 5 25 45 65 85 105 125 145
V
REF
(V)
Temperature ( C)°
-55 -35 -15 5 25 45 65 85 105 125 145
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
Average, nA
I (nA)
B
Temperature ( C)°
-55 -35 -15 5 25 45 65 85 105 125 145
9
8
7
6
5
4
3
2
1
0
Average
I ( A)m
TEMP
70
60
50
40
30
20
10
0
-10
-20
-30
Frequency (Hz)
CMRR (dB)
10 100 1k 10k 100k 1M
RTO of Front- End PGA
90
80
70
60
50
40
30
20
10
0
-10
Frequency (Hz)
PSRR (dB)
10 100 1k 10k 100k 1M
Small-Signal
V and V Enabled
V = 2.5V
PSRR at V
REF EXT
REF
OUT
80
60
40
20
0
Frequency (Hz)
Gain (dB)
10 100 1k 10k 100k 1M
G = Output Amplifier Gain
OUTAMP
G = 9V/V
G = 128V/V
OUTAMP
FRONT
G = 9V/V
G = 32V/V
OUTAMP
FRONT
G = 2V/V
G = 32V/V
OUTAMP
FRONT
G = 2V/V
G = 8V/V
OUTAMP
FRONT
PGA309
www.ti.com SBOS292C –DECEMBER 2003–REVISED JANUARY 2011
TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
SA
= V
SD
= +5V (V
SA
= V
SUPPLY ANALOG
, V
SD
= V
SUPPLY DIGITAL
, V
SA
must equal V
SD
), GND
D
= GND
A
= 0, and
V
REF
= REF
IN
/REF
OUT
= +5V, unless otherwise noted.
V
REF
vs TEMPERATURE I
B
CURRENT vs TEMPERATURE
Figure 1. Figure 2.
I
TEMP
CURRENT vs TEMPERATURE COMMON-MODE REJECTION RATIO vs FREQUENCY
Figure 3. Figure 4.
POWER-SUPPLY REJECTION RATIO vs FREQUENCY CLOSED−LOOP GAIN vs FREQUENCY
Figure 5. Figure 6.
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