TDA3833 データシートの表示（PDF） - Philips Electronics
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TDA3833 Datasheet PDF : 13 Pages
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Philips Semiconductors
BTSC-stereo/SAP/DBX decoder and DBX expander
Product specification
TDA3833
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
DBX section
V9
V10
V13
I9,10,13
S1
I12
SAP level control voltage range
(L - R) level control voltage range
spectral band level control voltage range
input current
spectral RMS-detector release rate
VI = 0.5VP
timing current for nominal release
rate of spectral RMS-detector
see note 4
−
1 to 4
−
−
1 to 4
−
−
1.8 to 3.2 −
−
−
5
343
381
419
−
22.5
−
V
V
V
µA
dB/s
µA
current adjustment range
−
11 to 45
µA
S2
wideband RMS-detector release rate
112.5 125
137.5
dB/s
I14
timing current for nominal release rate 0.33l12; see note 4 −
7.5
−
µA
of wideband RMS-detector
current adjustment range
−
4 to 15 −
µA
V15
timing adjustment
−
1.5 to 3.8 −
V
Notes to the characteristics
1. Requirements for the MPX/SAP input signal to ensure correct system performance:
a) Maximum variation of MPX/SAP signal under operating conditions: to be found (1 dB).
b) 3 dB bandwidth ≥ 130 kHz (∆f = 25 kHz).
c) THD (L + R, ∆f = 25 kHz, fmod = 1 kHz): 0.2%.
d) S/N(W), weighted in accordance with CCIR468-3 (L + R, ∆f = 25 kHz for sound carrier, fmod = 1 kHz, 75 µs
de-emphasis; with critical picture modulation): S/N(W) > 44 dB; with sync only: S/N(W) > 54 dB.
e) Spectral spurious attenuation: 40 dB (mainly n × fH; L + R, ∆f = 25 kHz for sound carrier fmod = 1 kHz, 50 Hz to
100 kHz, no de-emphasis).
f) Maximum white noise level (unweighted, 200 Hz to 100 kHz) to avoid malfunctioning of the identification circuits:
500 mV (RMS).
2. Adjustable on pin 27, measurement (fH) on pin 7 with a 2.7 kΩ resistor connected between VP and pin 31.
3. Can also be aligned to 600 mV (RMS), then identification threshold and AF output headroom will be decreased by
1.6 dB.
4. I12 and I14 can be measured via an ammeter connected to 4 V (3.5 to 4.1 V).
September 1992
8
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