U4476B-MFLG3 TEMIC [TEMIC Semiconductors], U4476B-MFLG3 Datasheet

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U4476B-MFLG3

Manufacturer Part Number
U4476B-MFLG3
Description
IF Amplifier / Converter for DVB (Cable)
Manufacturer
TEMIC [TEMIC Semiconductors]
Datasheet
TELEFUNKEN Semiconductors
Rev. A2, 15-Jan-98
IF Amplifier / Converter for DVB (Cable)
Description
The U4476B is a bipolar circuit for the processing of
DVB-Cable IF signals (Digital Video Broadcasting). The
amplifier/ converter is suitable for QAM modulated IF
Features
D
D
D
Block Diagram
Gain controlled amplifier for the 1st IF (36 MHz)
IF converter for the 2nd IF (7 MHz);
VCO circuit is controlled by external PLL
Bandwidth of the output signal: 10 MHz (–1 dB)
(DVB)
Ref
Tuner
IF 1
IF 2
V
S
10
12
11
24
28
Preliminary Information
5
6
9
7
Tuner
AGC
Band
Gap
3
Figure 1. Block diagram
AGC:
QAM
signals (1st IF) and provides the gain controlled 2nd IF.
With 5 V supply voltage the IC allows application in
RF/IF front ends for DVB-Cable receivers (set top boxes).
D
D
Package: 28-pin small outline plastic package (SO28)
23
Internal AGC with average detection for the QAM
modulated DVB signal, reference level is adjustable
5 V supply voltage; low-power consumption
8
VCO
21
22
Control
12703
20
18
13
15
2nd IF
PLL
I
select
U4476B
Input
2
C
1 (7)

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U4476B-MFLG3 Summary of contents

Page 1

... IF Amplifier / Converter for DVB (Cable) Description The U4476B is a bipolar circuit for the processing of DVB-Cable IF signals (Digital Video Broadcasting). The amplifier/ converter is suitable for QAM modulated IF Features D Gain controlled amplifier for the 1st IF (36 MHz converter for the 2nd IF (7 MHz); ...

Page 2

... U4476B Ordering Information Extended Type Number U4476B-MFLG3 Pin Description Ref in1 in1 AGC GND in2 in2 18 11 Rtop 17 12 Itun out 14529 Figure 2. Pinning Absolute Maximum Ratings ...

Page 3

... vco D f tun LOout vtun 0.5 I out 2 R out v 1.6 o,vid 2 U4476B Value Unit 4 +85 C Value Unit 75 K/W Typ. Max. Unit 5.0 5 100 mA 80 120 V rms W 1 MHz MHz 1.5 ...

Page 4

... Min. I tun V 0.3 out D : 10% to 90% G tun 8 U4476B 2.2 F 2.2 F AGC SAW 1 SAW 2 Figure 3. Typ. Max. Unit 13 ...

Page 5

... V ) 490 nH 4.7 k 560 Note: With external LO operation, Pin 18 (VCO tuning voltage) should be connected to the supply voltage, and Pin 20 (LO output) should not be connected to the PCB. U4476B +5 V S852T to Pin 7 100 nF 14581 Figure (better S852T 1 nF ...

Page 6

... U4476B Package Information Package SO28 Dimensions in mm 18.05 17.80 0.4 1.27 16. (7) Preliminary Information 9.15 8.65 7.5 7.3 2.35 0.25 0.10 10.50 10.20 15 technical drawings according to DIN specifications 14 TELEFUNKEN Semiconductors Rev. A2, 15-Jan-98 0.25 13033 ...

Page 7

... TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone 7131 67 2831, Fax number 7131 67 2423 TELEFUNKEN Semiconductors Rev. A2, 15-Jan-98 Preliminary Information unauthorized use. U4476B 7 (7) ...

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