TDA3858 Datasheet, PDF (10/17 Pages) NXP Semiconductors – Quasi-split sound processor for all standards

Philips Semiconductors
Quasi-split sound processor for all standards
Product specification
TDA3858
SYMBOL
PARAMETER
CONDITIONS
MIN.
∆G_AF2min
∆G_AF2max
V_{22, 24}
gain for minimum V_out
gain for maximum V_out
DC voltage (pins 22 and 24)
V₇ = 0 V
V₇ = 5 V
−1.5
1.0
−
AM demodulator V6 = 0 V (AM mode)
input signal at pins 1-2: SC = 32.4 MHz; f_mod = 1 kHz; m = 0.8; V_{i AM (RMS)} = 10 mV
V_o(RMS)
AF output signal at pin 11 (RMS
530
value)
R₁₁
output resistance (pin 11)
75
I_{o (M)}
maximum AC output current (peak note 5
−
value)
I₁₁
maximum DC output current
−
V₁₁
DC voltage
1.8
THD
total harmonic distortion
Fig.4
−
S/N(W)
weighted signal-to-noise ratio
CCIR468-3
50
B
AF bandwidth (−3 dB)
lower limit
−
upper limit
100
V₂₀
DC voltage (pin 20)
−
AF signal switches
input signals: AM carrier into pin 1, 2
see part AM demodulator
FM intercarrier into pin 21
see part FM demodulator
no signal in pin 25 (AF2)
the output signals are related to the signals described in the demodulator parts.
V_o/V_omute AF2 mute attenuation (pin 10)
B/G mode; V₆ = V_P 70
V_oAM/V_oFm AF1 AM signal (pin 11) attenuation of L mode; V₆ = 0;
70
unwanted FM signal
FM: modulated;
AM: unmodulated
V_oFM/V_oAM
AF1 FM signal (pin 11) attenuation of B/G mode; V₆ = V_P; 70
unwanted AM signal
FM: unmodulated;
AM: modulated
dV_{10, 11}
DC jump at the AF outputs
switching to FM or −
AM sound or Mute
TYP.
−2.5
1.5
1.8
MAX.
−
−
−
UNIT
dB
dB
V
600
675
mV
100
130
Ω
−
±1.5
mA
−
−2
mA
2.1
2.4
V
1
2
%
56
−
dB
−
20
Hz
−
−
kHz
2
−
V
−
−
dB
−
−
dB
−
−
dB
5
25
mV
June 1994
10