TSH344 STMicroelectronics, TSH344 Datasheet - Page 12

• Manufacturer Part Number: TSH344
• Description: 340MHz single-supply triple video buffer
• Manufacturer: STMicroelectronics

Specifications of TSH344

• Bandwidth: 340MHz
• Slew Rate: 740V/ms

Application information
3.2
12/17
Power supply considerations
Correct power supply bypassing is very important for optimizing performance in low and
high-frequency ranges. Bypass capacitors should be placed as close as possible to the IC
pin (pin 4) to improve high-frequency bypassing. A capacitor (C
necessary to improve the PSRR in low frequencies. For better quality bypassing, a capacitor
of 470nF (C
higher frequencies.
Figure 28. Circuit for power supply bypassing
Figure 29
on how carefully the power supply decoupling is achieved.
Figure 29. Improvement of power supply noise rejection
shows how the power supply noise rejection evolves versus frequency depending
HF
) is also added as close as possible to the IC pin to improve the PSRR in the
-10
-20
-30
-40
-50
-60
-70
-80
0
10k
Vcc=5V
Load=150
PSRR=20 log (
R
G
B
Ω
100k
Δ
VCC/
Frequency (Hz)
C
C
TSH344
LF
HF
Δ
=100uF
=470nF
Vout)
+V
4
5
1M
CC
+
without
capacitor
C
C
HF
LF
10M
LF
) greater than 100μF is
100M
TSH344