TYPICAL CHARACTERISTICS: VS = ±5V (Cont.)
TA = 25°C, G = +20V/V, RG = 39.2Ω, and RL = 100Ω, unless otherwise noted.
PHOTODIODE TRANSIMPEDANCE
FREQUENCY RESPONSE
SETTLING TIME
0.25
0.20
0.15
0.10
0.05
0
89
86
83
80
77
74
71
RF = 20kΩ
CF Adjusted
G = +20V/V
RL = 100Ω
O = 2V Step
CD = 10pF
[20log 20kΩ]
V
CD = 20pF
CD = 50pF
CD = 100pF
VO
0.01µF
OPA847
20kΩ
–0.05
–0.10
–0.15
–0.20
–0.25
20kΩ
IO
CF
CDIODE
[CD]
See Figure 1
30 35
0
5
10
15
20
25
40
1
10
Frequency (MHz)
100
Time (ns)
TYPICAL DC DRIFT OVER TEMPERATURE
SUPPLY AND OUTPUT CURRENT vs TEMPERATURE
100
90
80
70
60
50
20
18
16
14
12
10
0.2
0.1
25.0
12.5
0
Supply Current
100 x IOS
Sourcing Output Current
VIO
0
Sinking Output Current
–0.1
–0.2
–12.5
–25.0
Ib
–50
–25
0
25
50
75
100
125
–50
–25
0
25
50
75
100
125
Ambient Temperature (°C)
Ambient Temperature (°C)
COMMON-MODE INPUT RANGE AND OUTPUT SWING
vs SUPPLY VOLTAGE
COMMON-MODE AND DIFFERENTIAL
INPUT IMPEDANCE
107
106
105
104
103
102
5
4
RL = 100Ω
Common-Mode
(2.3MΩ, DC)
3
Positive Output
2
1
Positive Input
Negative Input
0
Differential
(2.7kΩ, DC)
–1
–2
–3
–4
–5
Negative Output
102
103
104
105
106
107
108
Frequency (Hz)
Supply Voltage (±V)
OPA847
8
SBOS251E
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