TDA8741 Datasheet, PDF (12/24 Pages) NXP Semiconductors – Satellite sound circuit with noise reduction

Philips Semiconductors
Satellite sound circuit with noise reduction
Product specification
TDA8741; TDA8741H
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Secondary channels - noise reduction pins 25 and 24 (21 and 20); note 4
V_OL,OR
output voltage at 0 dB noise
reduction input level
∆f_S1 = ∆f_S2 = 50 kHz;
no fixed de-emphasis
connected
V--V---_{O-O---L-L-,-,-O-O---R-R---(--(1--1-5---k-k-H-H--z-z-)--)-}
15 kHz frequency response
with respect to 1 kHz at 0 dB
noise reduction input level
∆f_S1 = ∆f_S2 = 50 kHz;
no fixed de-emphasis
connected
V_{OL, OR}
output voltage at −20 dB noise
reduction input level
∆f_S1 = ∆f_S2 = 5 kHz;
no fixed de-emphasis
connected
V--V---_{O-O---L-L-,-,-O-O---R-R---(--(1--1-5---k-k-H-H--z-z-)--)-}
15 kHz frequency response
∆f_S1 = ∆f_S2 = 5 kHz;
with respect to 1 kHz at −20 dB no fixed de-emphasis
noise reduction input level
connected
−1 +1 +3 dBV
−2 0
+2 dB
−29 −26 −23 dBV
−13 −11.5 −10 dB
External inputs - pin 28 (24) (left) and pin 27 (23) (right) - overall performance (output selector in position 5)
V_EXTR,EXTL
R_i
V_OL,OR
THD
S/N(A)
α_L/R,α_R/L
input signal level
input resistance
output level
total harmonic distortion
signal-to-noise ratio
crosstalk
V_{EXTR, EXTL} = −6 dBV
V_{EXTR, EXTL} = −6 dBV;
f_i = 1 kHz
A-weighted;
V_{EXTR, EXTL} = −6 dBV
f_i = 1 kHz
−
−
6
dBV
95 150 200 kΩ
−6.5 −6.0 −5.5 dBV
−
−
0.1 %
80 −
−
dB
−
80 −
dB
Secondary channels PLLs disable [SCD pin 11 (6)]; pin 11 (6) left open-circuit = logic HIGH
V_IL
LOW level input voltage
0
−
1.2 V
V_IH
HIGH level input voltage
3.5 −
9
V
R_i
input resistance
connected to V_P
65 100 130 kΩ
Output selector control circuit (see also Table 1) and main channel PLL lock-in select [MCS pin 7 (2)]; pins 15,
17, 26, 13 and 7 (10, 13, 22, 8 and 2) MOS inputs and should not be left open-circuit
V_IL
LOW level input voltage limits
V_IM
MID level input voltage limits for
MCS pin only
0
−
1.8 −
1.2 V
2.8 V
V_IMF
MID level input voltage on MCS V_P must be 1.8 to 13.2 V 17 19 21 %V_P
pin if MCS pin is floating
V_IH
HIGH level input voltage limits
R_IL
low input resistance MCS pin to
ground
3.5 −
V_P V
12 19 26 kΩ
R_IH
high input resistance MCS pin to
V_P
52 80 108 kΩ
I_IL
LOW level input current
V_IL = 0 V
−
<−1 −
µA
(not MCS pin)
I_IH
HIGH level input current
V_IH = 5 V
−
<1 −
µA
(not MCS pin)
October 1994
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