Datasheet

0.20
0.15
0.10
0.05
0
−
0.05
−
0.10
−
0.15
−
0.20
Time (10ns/div)
Output Voltage (V)
G = +5V/V
R
L
= 500
Ω
V
IN
= 0.07V
PP
f
IN
= 20MHz
2.0
1.5
1.0
0.5
0
−
0.5
−
1.0
−
1.5
−
2.0
Time (10ns/div)
Output Voltage (V)
G = +5V/V
R
L
= 500
Ω
V
IN
= 0.7V
PP
f
IN
= 20MHz
120
100
80
60
40
20
0
Input Voltage (mV)
Transconductance (mA/V)
−
30
−
20
−
10 0 10 20 30
Small−signal around input voltage.
I
Q
= 5.8mA
I
Q
= 4.7mA
I
Q
= 3.1mA
I
Q
= 1.65mA
6
4
2
0
−
2
−
4
−
6
OTA Input Voltage (mV)
OTA Output Current (mA)
−
50
−
40
−
30
−
20
−
10 0 10 20 30 40 50
I
Q
= 5.8mA
I
Q
= 1.65mA
I
Q
= 3.1mA
I
Q
= 4.7mA
I
OUT
V
IN
50
Ω
50
Ω
150
120
90
60
30
0
Quiescent Current (mA)
Transconductance (mA/V)
0 1 2 3 4 5 6 7
V
IN
= 100mV
PP
I
OUT
V
IN
50
Ω
50
Ω
100
10
Frequency (Hz)
OTA Transconductance (mA/V)
1 10 100 1k
R
L
= 50
Ω
V
IN
= 10mV
PP
I
Q
= 5.8mA
(93mA/V)
I
Q
= 4.7mA (80mA/V)
I
Q
= 3.1mA (60mA/V)
I
Q
= 1.65mA (37mA/V)
I
OU T
V
IN
50
Ω
50
Ω
OPA861
SBOS338G –AUGUST 2005–REVISED MAY 2013 www.ti.com
TYPICAL CHARACTERISTICS: V
S
= +5V
At T
A
= +25°C, I
Q
= 4.7mA, and R
L
= 500Ω to V
S
/2, unless otherwise noted.
OTA TRANSCONDUCTANCE vs FREQUENCY OTA TRANSCONDUCTANCE vs I
Q
Figure 19. Figure 20.
OTA TRANSCONDUCTANCE vs INPUT VOLTAGE OTA TRANSFER CHARACTERISTICS
Figure 21. Figure 22.
OTA SMALL-SIGNAL PULSE RESPONSE OTA LARGE-SIGNAL PULSE RESPONSE
Figure 23. Figure 24.
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