ISG510067 Datasheet, PDF (4/7 Pages) List of Unclassifed Manufacturers – DTV IF AGC AMPLIFIER

TYPICAL APPLICATION CIRCUIT
EPCOS X6864D
SAW FILTER
VDD
1uH
1uH
0.1uF
2K OHM
28,18 27,17 26,19 25, X 24,15 23,14 22,13
PIN Numbers
MLP-28 , TSSOP-20
ISG510067
0 OHM 1, X _GND
2, 20
NC*
3, 1
NC*
4, X
GC 2
GC 1
GND
5, X _GND
VDD
0.01uF
6, 2 _{VDD RF}
7, 6 _{GND RF}
RF
AMP
VIDEO ^{GND 21,16}
AMP
VID OUT 2 ^20,11
200 OHM
4:1
VID OUT 1 ^19,12
SPECTRUM
ANALYZER
50 OHM
VDD VIDEO ^18,10
VDD
0.01uF
17, 9
VDD
0.01uF
16, 8
GND
1000pF
15, 7
VDD
0.1uF
8, 3 9, 4
RF
1000pF
SOURCE
1M OHM
1M OHM
10, X 11, 5
1000pF
12, X 13, X 14, X
AGC
10K OHM
0.01uF
Input Amplifier
This amplifier provides a maximum gain of 44 dB. The gain is
controlled by applying a DC voltage (from 0 to 3 V) to the AGC
pin, providing 27 dB of range. The output stage current can be
set between 10 mA (R = 20) and 30 mA (R = 0) by connecting
an external resistor from pin 1 to ground.
Video Amplifier
This amplifier provides a maximum gain of 55 dB. The gain is
controlled by applying a DC voltage (from 0 to 3 V) to the AGC
pin, providing 27 dB of range. The outputs of the video amp
are both open drain and require pull-up inductors to VDD. Up
to 2 VPP can be delivered into a 500 Ω load.
Note:
1. The input amplifier and video amplifier are controlled by a single
AGC so the overall dynamic range is the sum of the input amplifier
range and the video amplifier range.
2. Inserting a resistor between GC1 and GC2 will reduce overall gain
of the RF Amp stage. (A 300 Ω resistor will reduce gain by
approximately 10 dB.)
REV. C
7/21/2004
4