TDA8741 Datasheet, PDF (2/24 Pages) NXP Semiconductors – Satellite sound circuit with noise reduction

Philips Semiconductors
Satellite sound circuit with noise reduction
Product specification
TDA8741; TDA8741H
FEATURES
• Demodulation of main audio signal using wide band PLL
(lock range selectable)
• Demodulation of secondary audio signals using wide
band PLL
• Noise reduction of the secondary audio signals
• Output selection: stereo, language 1, language 2, main
audio and external
• Mute control
• Line outputs (SCART level).
APPLICATIONS
• Satellite receivers
• TV sets
• Video recorders.
GENERAL DESCRIPTION
The TDA8741; TDA8741H is a multi-function sound IC for
use in satellite receivers, television sets and video
recorders. The pin numbers given in parenthesis
throughout this document refer to the QFP44 package.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS MIN. TYP. MAX. UNIT
Supply
V_P
supply voltage
8
12
Main channel
V_IN3(rms)
∆f_OM
V_OM
S/N(A)
input sensitivity pin 18 (14) (RMS value)
lock range PLL demodulator
either
or
output voltage pin 23 (19)
signal-to-noise ratio
S/N(A) = 40 dB −
1.0
A-weighted
5.5 −
10.0 −
−9
−6
62 70
Secondary channels
V_IN1,IN2(rms) input sensitivity pins 8 and 16 (3 and 11) (RMS value) S/N(A) = 40 dB −
0.8
∆f_OS1,2
lock range PLL demodulators
10.0 −
V_OR,OL
output voltage pins 24 and 25 (20 and 21)
−8
−6
S/N(A)
signal-to-noise ratio
A-weighted
72
80
Crosstalk
α_S/M
α_M/S
α_S/S
crosstalk from secondary to main channel
crosstalk from main to secondary channel
crosstalk between secondary channels
−
74
−
74
−
74
13.2 V
2.0 mV
7.5 MHz
11.5 MHz
−4
dBV
−
dB
1.5 mV
11.5 MHz
−4
dBV
−
dB
−
dB
−
dB
−
dB
ORDERING INFORMATION
TYPE
NUMBER
TDA8741
TDA8741H
NAME
SDIP42
QFP44⁽¹⁾
PACKAGE
DESCRIPTION
plastic shrink dual in-line package; 42 leads (600 mil)
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
VERSION
SOT270-1
SOT307-2
Note
1. When using IR reflow soldering it is recommended that the Drypack instructions in the “Quality Reference Handbook”
(order number 9398 510 63011) are followed.
October 1994
2