ST CCA014V1 User Manual

demonstration board based on the TSH345

Features

■ 4.5 V to 5.5 V single supply operation

■ R-G-B, Y-Pb-Pr, Y-C-CVBS, HD driving

■ 3 matched 6 dB amplifiers

■ 3 internal input DC level shifter

■ Specified for 150 Ω loads

■ 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

■ Standby mode

■ Mux on input

■ RoHS compliant

STEVAL-CCA014V1

Triple video buffer with filter for HD

Data brief

STEVAL-CCA014V1

Description

This demonstration board is designed to evaluate
the TSH345, 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.

June 2009 Doc ID 15862 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Circuit schematics STEVAL-CCA014V1

10uF

J13

J14

BNC

75R

J10

BN

J9

BNC

R3

47K

R2

75R

R2

nc

R3

nc

CR20R0R

R3

nc

+VCC

R1i

R2i

G1i

G2i

B1i

B2i

GND

VCC

Mux

Bout

10

Gout

11

Rout

12

FS1

13

FS0

14

+6dB

MUX

LPF

+6dB

MUX

LPF

+6dB

MUX

LPF

DC

Shif

IC

TSH345

J8

BNC

R2

75R

R2

nc

R2

nc

J7

BNC

R2

75R

R2

nc

R2

nc

C10ncnc

C11ncnc

C12ncnc

100uF

J11

BN

R3

47K

R3

nc

+VCC

J12

BN

R3

47K

R3

nc

+VCC

BNC

75R

CR30R0R

BNC

75R

CR40R0R

BNC

75R

CR50R0R

BNC

75R

CR60R0R

BNC

75R

CR10R0R

+VCC

100nF

R1

nc

R7

nc

+VCC

R1

nc

R8

nc

+VCC

R1

nc

R9

nc

+VCC

R1

nc

R10

nc

+VCC

R1

nc

R11

nc

+VCC

R1

nc

R12

nc

+VCC

+VCC

LR10R0R

S2

+VCC

S0

+VCC

S1

+VCC

R21

0R

R19

0R

R20

0R

J1

1 Circuit schematics

Figure 1. Schematic diagram

J7

BNC

0R

C10

R19

4
R2

nc

3

R2

75R

1

J14

2
1

5
J1

1

J13

C9C910uF

LR1

+VCC

C8C8100uF

CR2

4
R1

nc

R8

nc

+VCC

CR3

R2R275R

3

R1

nc

R7

nc

CR1

+VCC

R1R175R

2
R2

nc

1
IC

TSH345

5
R1

nc

R9

nc

+VCC

CR4

R3R375R

J8

BNC

0R

C11

R20

7
R2

nc

6
R2

75R

5
R2

nc

11

12

Rout

Gout

+6dB

+6dB

LPF

LPF

MUX

MUX

n

n
R1i

1

n

n
R2i

G1i

G2i

2

5

3

4

6
R1

R10

+VCC

nc

nc

CR5

R5R575R

R4R475R

J9

BNC

0R

C12

R21

0
R3

nc

9
R2

75R

8

R2

nc

8

10

Bout

GND

t

+6dB

Shif

DC

LPF

MUX

n

n

B1i

B2i

6

FS1
FS0
Mux

VCC

7

C7C7100nF

+VCC

S1

13
14

9

+VCC

7
R1

nc

R11

nc

+VCC

CR6

R6R675R

8

R1

R12

+VCC

+VCC

S2

nc

nc

6

47K

R3

5
R3

C
BN

nc

J12

+VCC

+VCC

4
R3

47K

S0

3

R3

C
BN

nc

J11

+VCC

2
R3

47K

C

1
R3

BN

nc

J10

+VCC

J1J1BNC

2/4 Doc ID 15862 Rev 1

J2J2BNC

J3J3BNC

J4J4BNC

J5J5BNC

J6J6BNC

AM03805v1