HMP8115 Intersil Corporation, HMP8115 Datasheet - Page 37

• Manufacturer Part Number: HMP8115
• Description: Ntsc/pal Video Decoder
• Manufacturer: Intersil Corporation

Pin Description
GAIN_CTRL
LAGC_CAP
A/D TEST
DEC_T
DEC_L
NAME
AGND
YOUT
CCAP
LCAP
GND
V
VAA
PIN
YIN
NC
C
CC
25, 33, 35, 36,
39, 46, 53, 62,
26, 31,37, 52,
59, 68, 75, 79
15,16, 21, 22,
4, 18, 20, 32,
1, 3, 10, 11,
NUMBER
69, 72, 80
(Continued)
2, 12,14
23, 24
73, 74
PIN
19
28
78
30
77
76
29
17
9
8
OUTPUT
INPUT/
O
O
I
I
I
I
I
I
I
I
I
I
I
I
Chrominance (C) video input. This input must be AC-coupled to the video signal (us-
ing a 1 F capacitor) and terminated with a 75 resistor, as shown in the Applications
section. These components, and the corresponding anti-aliasing lowpass filter,
should be as close to this pin as possible for best performance. If not used, this pin
should be connected to AGND through a 0.1 F capacitor.
Analog output of the video multiplexer. This output should be lowpass filtered and in-
put via the YIN pin, as shown in the Applications section. The anti-aliasing lowpass
filter should be as close to YOUT and YIN as possible for best performance.
Analog input to the ADC.
Gain Control Input. A DC voltage is used to set the video amplifier’s gain, as shown
in Figure 2. The reference circuit should be as close to this pin as possible for best
performance.
Decoupling for A/D Converter Reference. A 0.1 F capacitor should be connected be-
tween this pin and AGND, as shown in the Applications section. This capacitor should
be as close to this pin as possible for best performance.
Decoupling for A/D Converter Reference. A 0.1 F capacitor should be connected be-
tween this pin and AGND, as shown in the Applications section. This capacitor should
be as close to this pin as possible for best performance.
Capacitor connection for Luminance AGC Circuit. Controls the AGC loop time con-
stant. A 0.01 F capacitor should be connected between this pin and AGND, as shown
in the Applications section. This capacitor should be as close to this pin as possible
for best performance.
Capacitor connection for Luminance Clamp Circuit. Controls the clamp loop time con-
stant. A 0.047 F capacitor should be connected between this pin and AGND, as
shown in the Applications section. This capacitor should be as close to this pin as
possible for best performance.
Capacitor connection for Chrominance Clamp Circuit. Controls the clamp loop time
constant. A 0.047 F capacitor should be connected between this pin and AGND, as
shown in the Applications section. This capacitor should be as close to this pin as
possible for best performance.
Digital power supply pins. All V
Digital ground pins. All GND pins must be connected together.
Analog power supply pins. All VAA pins must be connected together.
Analog ground pins. All AGND pins must be connected together.
A/D test pin. This pin must be left floating for proper operation.
No Connect pins. These pins must be left floating for proper operation.
HMP8115
37
CC
DESCRIPTION
pins must be connected together.