ISG510065 Datasheet, PDF (5/8 Pages) List of Unclassifed Manufacturers – CATV OUT-OF-BAND TUNER

TYPICAL APPLICATION CIRCUIT
EPCOS X6959M
SAW FILTER
PIN Numbers
MLP-28 , TSSOP-20
VDD
270nH
1uH
1uH
27pF
8.2pF
27pF
0.1uF
28,18 27,17 26,19 25, X 24,15 23,14 22,13
ISG510065
0 OHM 1, X _GND
2, 20
NC*
MIX IN 2
3, 1
NC*
MIX IN 1
4, X _GND
5, X _GND
VDD
0.01uF
6, 2 _{VDD RF}
7, 6 _{GND RF}
MIXER
RF
AMP
VIDEO ^{GND 21,16}
AMP
IF OUT 2 ^20,11
200 OHM
4:1
IF OUT 1 ^19,12
SPECTRUM
ANALYZER
50 OHM
LO
BUFFER
VDD VIDEO ^18,10
0.01uF
VDD LO ^{17, 9}
0.01uF
LO IN 2 ^{16, 8}
1000pF
LO IN 1 ^{15, 7}
VDD
0.1uF
LOCAL
OSCILLATOR
1000pF
RF
SOURCE
8, 3
1000pF
9, 4 10, X 11, 5 12, X 13, X 14, X
1000pF
AGC
10K OHM
0.01uF
RF Amplifier
This amplifier provides a maximum gain of 29 dB. The gain is
programmed by applying a DC voltage (from 0 to 3 V) to the
AGC pin, providing 27 dB of range.
Downconversion Mixer
This double balanced mixer has 12 dB of conversion gain. The
outputs of the mixer are both open drain and require pull-up
inductors to VDD.
Video Amplifier
This amplifier provides a maximum gain of 55 dB. The gain is
programmed by applying a DC voltage (from 0 to 3 V) to the
AGC pin, providing 28 dB of range. The outputs of the video
amp are both open drain and require pull-up inductors to VDD.
Note:
1. The RF amplifier and video amplifier are controlled by a single AGC
so the overall dynamic range is the sum of the RF amplifier range
and the video amplifier range.
REV. D
7/19/2004
D
5