U4488B ATMEL Corporation, U4488B Datasheet

no-image

U4488B

Manufacturer Part Number
U4488B
Description
Manufacturer
ATMEL Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
U4488B
Manufacturer:
ATMEL
Quantity:
6 229
Quasi-Split Sound Circuit and AM Demodulator
Description
The U4488B is an integrated bipolar circuit for full multi-
standard sound IF signal processing in TV/VTR and
Multimedia applications. It supplies AM signals as well
as FM/NICAM sound IF signals and thus allows the de-
Features
D 5-V supply voltage; low power consumption
D Gain-controlled 3-stage wideband IF amplifier
D Active
Block Diagram
IF
Ordering Information
Rev. A3, 08–Mar–01
IF
AM
FM
(frequency-phase-locked-loop) for true quadrature
demodulation
Extended Type Number
carrier generation by FPLL principle
U4488B
AGC
IF1/IF2
1
2
15
16
3
S3
11
IF-Switch
13
Preliminary Information
4
IF-Amp
Mean
Peak
level
REF
Mean/peak
14
V
Figure 1. Block diagram
IF AGC
Package
S
DIP16
7
S1
sign of a universal sound IF module for various
applications. The U4488B has the same performance like
the U4468B, with the additional feature of a second sym-
metrical IF input.
D Complete alignment-free AM demodulator
D Switchable amplitude detector for gain control, which
D Two symmetrical IF inputs
FPLL
operates as a peak detector for FM sound and as a
mean level detector for AM sound
Loop
filter
AM-Det
5
90
0
Mute
VCO
10
S2
Remarks
12
8
9
6
U4488B
Intercarrier
AF(AM)
VCO
(FM)
13789
1 (9)

Related parts for U4488B

U4488B Summary of contents

Page 1

... Quasi-Split Sound Circuit and AM Demodulator Description The U4488B is an integrated bipolar circuit for full multi- standard sound IF signal processing in TV/VTR and Multimedia applications. It supplies AM signals as well as FM/NICAM sound IF signals and thus allows the de- Features D 5-V supply voltage; low power consumption D Gain-controlled 3-stage wideband IF amplifier ...

Page 2

... U4488B Circuit Description IF Amplifier and AGC The symmetrical IF input signal from the external SAW filter is fed to the Pins 1 and 2 resp. Pins 15 and 16. For FM/NICAM application, a SAW filter with double bandpass characteristic is required for the vision and sound carrier. In case of L-standard, a bandpass filter with the center frequency at the L-sound carrier is used ...

Page 3

... Pins 5, 8 and 9 V ext Pins 7, 10 and amb T stg all pins V ESD Symbol R thJA Preliminary Information U4488B i2, i2, GND U4488B o, sw, sw,mute VCO 13791 Figure 2. Pinning Value Unit 4.5 to 9.0 55 500 5 + 4 +125 0 to +85 –25 to +125 " 300 Value ...

Page 4

... U4488B Electrical Characteristics reference point Pin 13, unless otherwise specified S amb Parameters DC-supply Supply voltage Supply current v IF-input Minimum IF input signal Output signal: –3 dB Maximum IF input signal Output signal Input impedance (See note 1) Input capacitance (See note 1) IF input switch Switching voltage: IF input 1 ...

Page 5

... Channel 1 (Pin 6) (see note out v oAF B THD = 1 kHz, 12.5 kHz S kHz 33.4 MHz kHz 54%; v mod Preliminary Information U4488B Min. Typ. Max. Unit 200 100 150 mV rms tbd MHz tbd MHz 60/58 dB 58/ " 0.7 mA – 150 500 ...

Page 6

... Standard L IF2 32.4 MHz IF Standard B/G IF1 33.4 38.9 MHz MHz 6 ( U2860B SFT 5.5MA 15 nF Mute Squelch IF1/IF2 Mute U4488B 4.7 F 4.7 F 470 nF 150 Figure 3. Preliminary Information 270 500 2 3 AF2 AF1 S2 VCO (38.9 MHz 8 AGC S1 (Mean/Peak) AF (AM) 13790 Rev. A3, 08– ...

Page 7

... Figure 5. AGC time constant (Pin 3) 4 4.25 V 13797 Figure 6. Internal reference voltage (Pin 4) Rev. A3, 08–Mar– 2 13792 1. 3.5 V Preliminary Information U4488B 2.75 V 13798 Figure 7. Loop filter (Pin 5) 100 1 mA IDC 13799 Figure 8. AM output (Pin 13800 Figure 9. AGC switch (Pin 7) ...

Page 8

... U4488B Internal Pin Configuration Figure 10. VCO (Pins 8 and 9) 3 Figure 11. Mute switch (Pin 10) Package Information Package DIP16 Dimensions in mm Alternative ( 13801 12 2.6 V 13802 Figure 13. Intercarrier output (Pin 12) 20.0 max 4.8 max 0.5 min 1.64 0.58 2.54 1.44 0.48 17. Preliminary Information 3 ...

Page 9

... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A3, 08–Mar–01 Preliminary Information U4488B http://www.atmel–wm.com 9 (9) ...

Related keywords