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參數(shù)資料
| 型號(hào)： | ISG510067 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DTV IF AGC AMPLIFIER |
| 中文描述： | 數(shù)字電視IF AGC放大器 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大小： | 209K |
| 代理商： | ISG510067 |
ISG510067
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.
TYPICAL APPLICATION CIRCUIT
REV. C
4
7/21/2004
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 V
DD.
Up
to 2 V
PP
can be delivered into a 500
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.
0.01uF
0 OHM
7, 6
6, 2
5, X
4, X
3, 1
2, 20
1, X
28,18
27,17
26,19
25, X
24,15
23,14
22,13
21,16
20,11
19,12
18,10
17, 9
16, 8
15, 7
8, 3
9, 4
10, X
11, 5
12, X
13, X
14, X
VIDEO
AMP
RF
AMP
GND
GC 2
GC 1
GND
GND
VDD RF
GND RF
GND
VID OUT 2
VID OUT 1
VDD VIDEO
VDD
VDD
GND
R
R
G
V
G
G
G
A
A
V
V
G
G
G
AGC
VDD
RF
SOURCE
SPECTRUM
ANALYZER
50 OHM
VDD
VDD
EPCOS X6864D
SAW FILTER
1uH
0.1uF
4:1
200 OHM
0.1uF
0.01uF
0.01uF
1000pF
1000pF
1000pF
0.01uF
10K OHM
1M OHM
1M OHM
NC*
NC*
1uH
2K OHM
PIN Numbers
MLP-28 , TSSOP-20
2. Inserting a resistor between GC1 and GC2 will reduce overall gain
of the RF Amp stage. (A 300
resistor will reduce gain by
approximately 10 dB.)
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