tda8740h NXP Semiconductors, tda8740h Datasheet - Page 12

• Manufacturer Part Number: tda8740h
• Description: Satellite Sound Circuit With Noise Reduction
• Manufacturer: NXP Semiconductors

Philips Semiconductors
October 1994
Secondary channels - low-pass filter pins 38 and 30 (34 and 26)
Secondary channels - noise reduction pins 25 and 24 (21 and 20); note 4
V
V
External inputs - pin 28 (24) (left) and pin 27 (23) (right) - overall performance (output selector in position 5)
V
R
V
THD
S/N(A)
Input selector control circuit pins 3 and 5 (41 and 43) (see also Table 1) and secondary channels PLLs disable
[SCD pin 11 (6)]; pins 3, 5 and 11 (41, 43 and 6) left open-circuit = logic HIGH
V
V
R
V
---------------------------------------------------------- -
V
---------------------------------------
V
---------------------------------------
V
V
V
L/R
OL,OR
OL,OR
EXTR,EXTL
OL,OR
IL
IH
Satellite sound circuit with noise reduction
i
i
RECTL RECTR 50 kHz
OL OR 15 kHz
OL OR 15 kHz
RECTL RECTR 1 kHz
OL OR 1 kHz
OL OR 1 kHz
,
R/L
SYMBOL
50 kHz frequency response
with respect to 1 kHz
output voltage at 0 dB noise
reduction input level
15 kHz frequency response
with respect to 1 kHz at 0 dB
noise reduction input level
output voltage at 20 dB noise
reduction input level
15 kHz frequency response
with respect to 1 kHz at
level
input signal level
input resistance
output level pins 25 and 24 (21
and 20)
total harmonic distortion
signal-to-noise ratio
crosstalk
LOW level input voltage
HIGH level input voltage
input resistance
20 dB noise reduction input
PARAMETER
12
note 7
no fixed de-emphasis
connected
no fixed de-emphasis
connected
no fixed de-emphasis
connected
no fixed de-emphasis
connected
V
V
f
A-weighted;
V
f
connected to V
i
i
f
f
f
f
EXTR, EXTL
EXTR, EXTL
EXTR, EXTL
= 1 kHz
= 1 kHz
S1
S1
S1
S1
= f
= f
= f
= f
CONDITIONS
S2
S2
S2
S2
= 50 kHz;
= 50 kHz;
= 5 kHz;
= 5 kHz;
= 6 dBV
= 6 dBV;
= 6 dBV
P
TDA8740; TDA8740H
95
80
0
3.5
65
MIN.
25
1
2
29
13
6.5
+1
0
150
80
100
TYP.
16
26
11.5
6.0
Product specification
+3
+2
6
200
0.1
1.2
9
130
MAX.
9
23
10
5.5
dB
dBV
dB
dBV
dB
dBV
k
dBV
%
dB
dB
V
V
k
UNIT