OPA675 Datasheet, PDF (12/13 Pages) Texas Instruments – Wideband Switched-Input OPERATIONAL AMPLIFIER

40Ω
200Ω
40Ω
In
100Ω
2
–
+
1
16
+
–
15
TTL
12
OPA676
Out
8
5
11
16pF
95.3Ω
Gain
Trim
10Ω
10kΩ
200Ω
+5v
10kΩ
Offset Trim
–5v
FIGURE 14. Synchronous Modulator/Demodulator with Car-
rier Balance Trim (Gain = ±5V/V).
Input
A
Input
B
51.1 Ω
49.9
Ω
49.9
Ω
51.1 Ω
383 Ω 383 Ω
+5V
Offset Trim
3 ^{10k Ω}
2
–
4
+A
4.7µF*
+
7
1
OOPPAA667756
8
16
+B
5
11
–
15
10
4.7µF*
+
4.7 pF
12
–5V
383 Ω
383 Ω
ADC603
45 Signal
Input
46 Analog
Common
Input Select (TTL)
* Tantalum
FIGURE 15. Multiplexed Input +16V/V Gain (24dB) Buffer
Amplifier.
–5V 5kΩ +5V
4.99kΩ
90.9Ω
909Ω
10Ω
50Ω
RF or IF
In
49.9Ω
49.9Ω
TTL In
Noise
2
–
+A
1
Blanking
49.9Ω _Pulse
Input
12
8
50Ω
RF or IF
Out
49.9Ω
OPA676
16
+B
5
–
15
11
6.5pF
909Ω
100Ω
FIGURE 16. Receiver Noise Blanker: A Wideband Gated
Video Amplifier.
–
In 1
+
+
In 2
–
100Ω
1kΩ
100Ω
1kΩ
1kΩ
Diff ECL
A
A
2
–
12
+A
13
1
8
OPA676
16
+B
–
15
11
5
~5pF
100Ω
100Ω
1kΩ
Output
FIGURE 17. Differential Input Multiplexer with Gain of
10V/V (20dB).
R₁
In
R₁
R₂
TTL
2
–
+
1
12
8
Out
OPA676
16 ₊
5
–
15
11
C_C
R₂
VOLTAGE GAIN
R₁
(V/V)
(Ω)
+2
200
+5
49.9
+10
22.1
R₂
C_C
(Ω)
(pF)
200
35
200
16
200
6.5
FIGURE 18. Programmable-Gain Amplifier.
®
OPA675/676
12