Philips Semiconductors
Dual channel TV FM intercarrier
sound demodulator
Product specification
TDA9821
CHARACTERISTICS
All voltages are measured to GND (pin 13); VP = 5 V; Tamb = 25 °C; ∆fi = ±50 kHz; fmod = 1 kHz;
V1, 15 = 10 mV (RMS value); measurements taken in Fig.5; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
Supply (pin 14)
VP
supply voltage
IP
supply current
Limiter-amplifier 1
V1
R1
V1(rms)
DC input voltage
input resistance
input signal (RMS value)
allowed input signal (RMS value)
S------N+-----N--- = 40 dB
4.5
5.0
23
30
2.25 2.5
480
600
−
150
200
−
Limiter-amplifier 2
V15
V15(rms)
DC input voltage
input signal (RMS value)
2.25 2.5
S------N+-----N--- = 40 dB ; note 1 −
150
input signal for mute off (RMS value)
0.7
1.0
∆V15
R15
allowed input signal (RMS value)
mute hysteresis
input resistance
200
−
8
12
480
600
PLL FM demodulators VCO1 and VCO2
fVCO1
fVCO2
∆ffr
free-running frequency
free-running frequency
negative/positive free-running
frequency spread
R11 = 27 kΩ
R11 = 27 kΩ
−
5.5
−
5.7
−
−
D/∆ffr
drift of free-running frequencies
Tamb = 0 to 70 °C
−
500
∆ffr(shift) shift of free-running frequencies
4.5 V < VP < 8.8 V
−
200
∆ffr(ar)
negative/positive adjustment range of
free-running frequencies
R11 = 22 kΩ
1
−
R11
adjustment resistance for free-running
frequencies (pin 11)
15
−
S
negative slope of free-running frequency R11 = 22 kΩ
adjustment
−
200
∆f1
negative/positive catching range of PLLs
∆f2
negative/positive holding range of PLLs
1.4
1.9
2.0
3.0
MAX.
8.8
37
2.75
720
250
−
2.75
250
1.5
−
16
720
−
−
10
−
−
−
29
−
−
−
UNIT
V
mA
V
Ω
µV
mV
V
µV
mV
mV
dB
Ω
MHz
MHz
%
kHz
kHz
MHz
kΩ
kHz/kΩ
MHz
MHz
1996 Nov 20
6