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參數(shù)資料
| 型號： | U4488B |
| 英文描述： | Quasi-Split Sound Circuit and AM Demodulator |
| 中文描述： | 準(zhǔn)分離聲音電路和AM解調(diào)器 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 272K |
| 代理商： | U4488B |
U4488B
TELEFUNKEN Semiconductors
Rev. A2, 15-Jan-98
Preliminary Information
4 (9)
Electrical Characteristics
VS = + 5 V, Tamb = + 25°C; reference point Pin 13, unless otherwise specified
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
DC-supply
(Pin 14)
Supply voltage
VS
4.5
5.0
9.0
V
Supply current
vin=10 mV or V3 = 2 V
IS
40
mA
IF-input
(Pins 1 and 2 resp. 15 and 16)
Minimum IF input signal
Output signal: –3 dB
vin
50
Vrms
Maximum IF input signal
Output signal: +1 dB
vin
70
100
mVrms
Input impedance
(See note 1)
Rin
1.2
k
W
Input capacitance
(See note 1)
Cin
2
pF
IF input switch
(Pin 11)
Switching voltage: IF input 1
Inputs: Pins 1 and 2
VswIF1
open
Switching voltage: IF input 2
Inputs: Pins 15 and 16
VswIF2
0
1.5
V
Switching current
Isw
–50
A
SIF-AGC
(Pin 3)
IF gain control range
Gv
60
65
dB
AGC capacitor
CAGC
4.7
F
FPLL and VCO
(Pins 5, 8 and 9)
Max. oscillator frequency
For carrier generation
fVCO
70
MHz
Vision carrier capture range
fvco = 38.9 MHz
Cvco = 6.2 pF
Dfcap
"1.5
"2
MHz
Oscillator drift (free runing)
as function of temperature
DTamb = 55°C,
fvco = 38.9 MHz
Cvco = 6.2 pF,(see note 2)
Df/DT
–0.3
%
Standard switch
(Pin 7)
Switching voltage for mode 1:
FM/NICAM sound
Peak value control
(see note 3)
Vsw1
2.0
VS
V
Switching voltage for mode 2:
AM sound
Average level control
Vsw2
0
1.5
V
Switching current
Isw
"100
mA
AM mute switch
(Pin 10)
Switching voltage
AM output active
Vmute1
open
Switching voltage
AM output switched off
Vmute2
0
1.5
V
Switching current
Imute
–100
mA
Notes
1.
This parameter is given as an application information and not tested during production
2.
The oscillator drift is related to the picture carrier frequency, with external temperature compensated LC circuit
3.
Without external control voltage (Pin 7 open), the IC automatically operates in mode 1
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