UPC2798GR
Pin Pin Pin Voltage Function and Explanation Equivalent Circuit
No. Name Typ. (V)
( ) is value
at V
CC = 9V
11 OUT2 2.5 Output pins for the video amplifier. With R
L
= 1k Ω,
(4.7) the differential output voltage is 3 Vp-p. OUT1 and
INA are in phase. OUT2 and INB are in phase. In
the case of a single-ended output, bypass the unused
pin to ground through a capacitor.
12 OUT1 2.5
(4.7)
13 VCC2 5~9 Supply voltage pin for the video amplifier block. This
pin should be connected with a bypass capacitor
(e.g., 1000 pF) to minimize ground impedance.
14 INB 2.5 Input pins for the video amplifier. These pins have
(4.1) high impedance. In the case of a single-ended input,
bypass the unused pin to ground through a capacitor.
15 INA 2.5
(4.1)
16 G1B 1.7 Gain control pins for the video amplifier. The gain
(3.3) may be adjusted by varying the value of the resistor
between pins 16 and 17. Maximum gain = short;
Minimum gain = open.
17 G1A 1.7
(3.3)
18 MIX OUT1 3.7 Output pins for the downconverter. These are emitter
follower outputs which feature low impedance. In the
case of a single-ended output, bypass the unused
pin to ground through a capacitor.
19 MIX OUT2 3.7
20 GND 0.0 Ground pin. This pin must be connected to system
ground. Form ground pattern as wide as possible
to minimize ground impedance.
PIN FUNCTIONS
11
12
13
17
15
13
14
16
REG
