THS7315_14 Datasheet, PDF (6/28 Pages) Texas Instruments – 3-Channel SDTV Video Amplifier with 5th-Order Filters and 5.2-V/V Gain

THS7315
SLOS532 – JUNE 2007
FUNCTIONAL BLOCK DIAGRAM
Channel 1
Input
Channel 2
Input
Channel 3
Input
+V_S
g_m⁺
-
800 kW
Sync-Tip
Clamp
(DC restore)
Level
Shift
LPF
5-Pole
8.5 MHz
+V_S
g_m^+-
800 kW
Sync-Tip
Clamp
(DC restore)
Level
Shift
LPF
5-Pole
8.5 MHz
+V_S
g_m^+-
800 kW
Sync-Tip
Clamp
(DC restore)
Level
Shift
LPF
5-Pole
8.5 MHz
5.2 V/V
5.2 V/V
5.2 V/V
Channel 1
Output
Channel 2
Output
Channel 3
Output
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+3 V to +5 V
TEST CIRCUITS
R_SOURCE
V_SOURCE
R_TERM
R_TERM
R_TERM
THS7315
1 CH.1 IN CH.1 OUT 8
2 CH.2 IN CH.2 OUT 7
3 CH.3 IN CH.3 OUT 6
4 VS+
GND 5
0.1 mF
+
+V_S
100 mF
R_LOAD
R_LOAD
R_LOAD
Figure 1. DC-Coupled Input and Output Test Circuit
470 mF
C_IN
+
R_SOURCE
V_SOURCE
R_TERM
C_IN
R_TERM
C_IN
R_TERM
THS7315
1 CH.1 IN CH.1 OUT 8
2 CH.2 IN CH.2 OUT 7
3 CH.3 IN CH.3 OUT 6
4 VS+
GND 5
0.1 mF
+
+V_S
100 mF
0.1 mF
470 mF
+
0.1 mF
470 mF
+
0.1 mF
R_LOAD
R_LOAD
R_LOAD
Figure 2. AC-Coupled Input and Output Test Circuit
6
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