demonstration board based on the TSH346
Features
■ 4.5 V to 5.5 V single supply operation
■ R-G-B, Y-Pb-Pr, Y-C-CVBS, HD driving
■ 3 channels with 6 dB gain buffer
■ 3 video reconstruction filters for HD
■ 3 internal input DC level shifter
■ No input capacitor is required
■ Very low harmonic distortion
■ Each output can drive AC/DC coupled
150 Ω loads
■ Tested on 5 V power supply
■ RoHS compliant
Description
This demonstration board is designed to evaluate
the TSH346, a single supply triple video buffer
featuring an internal gain of 6 dB and an internal
low pass filter of 36 MHz cut-off frequency for
each channel to fit with high definition
requirements for video line interfaces.
STEVAL-CCA015V1
Triple video buffer with filter for HD
Data brief
STEVAL-CCA015V1
June 2009 Doc ID 15863 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematics STEVAL-CCA015V1
J1
BNC_75R
J2
BNC_75R
75R
75R
+VCC
+Vcc
J8
GND
+VCC
C1
10uF
C2
100nF
C3
nc
C4
nc
GND
VCC
IC1
TSH
346
J3
BNC_75R
75R
J5
BNC_75R
R1
75R
J4
BNC_75R
R1
75R
J6
BNC_75R
R2
75R
nc
R1
nc
R1
nc
nc
nc
C10ncnc
R4
0R
R11
0R
R18
0R
LR10R0R
CR1
0R
CR2
0R
CR3
0R
R2
nc
R9
nc
R16
nc
+VCC
+VCC
+VCC
nc
nc
R12ncnc
R14ncnc
R19ncnc
R21ncnc
J9
SILx
1 Circuit schematics
Figure 1. Schematic diagram
1
J8
GND
BNC_75R
J2
BNC_75R
J4
J6
BNC_75R
1
J9
2
2
1
J7J7+Vcc
0R
R4
C6C6nc
0R
R11
C8C8nc
0R
R18
C10
SILx
LR1
R7R7nc
R14
R21
nc
C4
+VCC
C3
nc
+VCC
C1
10uF
C2
100nF
R6R675R
4
R5R5nc
VCC
IC1
346
TSH
R3R3nc
0R
3
R1
75R
R12
8
7
1
2
3 6
0
R1
nc
0R
GND
0R
75R
0
R2
R19
5
7
R1
nc
2/4 Doc ID 15863 Rev 1
CR1
R2
nc
CR2
R9
nc
nc
R16
CR3
R1R175R
+VCC
R8R875R
+VCC
5
R1
+VCC
75R
J1
BNC_75R
J3
BNC_75R
J5
BNC_75R
AM03806v1
STEVAL-CCA015V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
11-Jun-2009 1 Initial release.
Doc ID 15863 Rev 1 3/4
STEVAL-CCA015V1
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4/4 Doc ID 15863 Rev 1
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