Datasheet

0.8
0.6
0.4
0.2
0
−
0.2
−
0.4
−
0.6
−
0.8
Time (10ns/div)
Output Voltage (V)
G = +5V/V
R
L
= 500
Ω
V
IN
= 0.25V
PP
f
IN
= 20MHz
See Figure 48
3
2
1
0
−
1
−
2
−
3
Time (10ns/div)
Output Voltage (V)
G = +5V/V
R
L
= 500
Ω
V
IN
= 1V
PP
f
IN
= 20MHz
See Figure 48
160
140
120
100
80
60
40
20
0
Input Voltage (mV)
Transconductance (mA/V)
−
40
−
30
−
20
−
10 0 10 20 30 40
I
Q
= 6.5mA
I
Q
= 5.4mA
I
Q
= 3.4mA
I
Q
= 1.9mA
Small signal around input voltage.
8
6
4
2
0
−
2
−
4
−
6
−
8
OTA Input Voltage (mV)
OTA Output Current (mA)
−
70
−
60
−
50
−
40
−
30
−
20
−
10 0 10 20 30 40 50 60 70
I
Q
= 6.5mA
I
Q
= 5.4mA
I
Q
= 3.4mA
I
Q
= 1.9mA
I
OUT
V
IN
50
Ω
50
Ω
150
120
90
60
30
0
QuiescentCurrent(mA)
Transconductance(mA/V)
1 2 3 4 5 6 7
8
V
IN
=100mV
PP
g = 0.8265.I-
m Q Q
2
+ 24.197.I 1.466-
I
OUT
V
IN
50W
50W
0
1000
100
10
Frequency (Hz)
Transconductance (mA/V)
1M 10M 100M 1G
R
L
= 50
Ω
V
IN
= 10mV
PP
I
Q
= 6.5mA (117mA/V)
I
Q
= 5.4mA (102mA/V)
I
Q
= 3.4mA (79mA/V)
I
Q
= 1.9mA (51mA/V)
I
O U T
V
IN
50
Ω
50
Ω
OPA861
www.ti.com SBOS338G –AUGUST 2005–REVISED MAY 2013
TYPICAL CHARACTERISTICS: V
S
= ±5V
At T
A
= +25°C, I
Q
= 5.4mA, and R
L
= 500Ω, unless otherwise noted.
OTA TRANSCONDUCTANCE vs FREQUENCY OTA TRANSCONDUCTANCE vs QUIESCENT CURRENT
Figure 2. Figure 3.
OTA TRANSCONDUCTANCE vs INPUT VOLTAGE OTA TRANSFER CHARACTERISTICS
Figure 4. Figure 5.
OTA SMALL-SIGNAL PULSE RESPONSE OTA LARGE-SIGNAL PULSE RESPONSE
Figure 6. Figure 7.
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