NTE1728 [NTE]
Integrated Circuit VIF & SIF Circuit for VCR; 集成电路VIF和SIF电路的VCR
| 型号： | NTE1728 |
| 厂家： | 
NTE ELECTRONICS |
| 描述： | Integrated Circuit VIF & SIF Circuit for VCR |
| 文件： | 总3页 (文件大小：28K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NTE1728
Integrated Circuit
VIF & SIF Circuit for VCR
Description:
The NTE1728 is an integrated circuit in a 30–Lead DIP type package containing the VIF section and
SIF on a single chip. Since this device is capable of performing video detection and sound detection
independently or simultaneously, it can be applied to various sets from popular type to high–grade
type according to the designer’s policy.
Features:
D High–Gain VIF Amp Requiring No Preamp
D High AGC Speed
D Provides Wide–Band Detection Characteristics and Meets Sound MPX Demodulation Requirements
because of FM Detection being Quadrature Detection.
D Possible to use Sound REC Pin (Pin2), AUX Pin (Pin3)
D Possible to Mute Video, Sound for VCR
D Pin7 GND: Muting of both Video and Sound
D Pin29 GND: Muting of Sound Only
Functions:
D VIF Section: VIF Amp Video Det, Peak IF AGC, B/W Noise–Canceller, RF AGC, AFT, SIF DET
D SIF Section: SIF Limiter Amp, FM Det, DC ATT, AF Driver
Operating Characteristics: (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF),
fo = 4.5MHz (SIF) unless otherwise specified)
Parameter
VIH Section
Symbol
Test Conditions
Min
Typ Max
Unit
Total Circuit Current
Maximum RF AGC Voltage
Minimum RF AGC Voltage
Quiescent Video Output Voltage
Quiescent AFT Output
Input Sensitivity
I
23
+ I
DC
DC
DC
DC
DC
59
8.5
–
74
8.9
0
98
9.2
0.5
6.6
7.5
42
–
mA
V
24
VH
13H
V
13L
V
V
22
5.6
4.5
30
60
6.1
6.5
36
74
V
V
17
V
V
i
f = 400Hz 40% AM, V = 0.8V
m pp
dBµ
dB
O
AGC Range
GR
f = 15kHz 78% AM, V = ±1dB
m O
Operating Characteristics (Cont’d): (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz
(VIF), fo = 4.5MHz (SIF) unless otherwise specified)
Parameter
VIH Section (Cont’d)
Maximum Allowable Input
Video Output Amplitude
Output S/N
Symbol
Test Conditions
Min
Typ Max
Unit
V
imax
f = 15kHz 78% AM, V = ± 1dB
m O
V
O(22)
V = 10mV , fm = 15kHz 78% AM
1.9
48
50
2.2
54
57
2.5
–
V
pp
i
rms
S/N
CL
V = 10mV , CW
dB
dB
V
i
rms
Carrier Leakage
V = 100mV , fm = 15kHz 78% AM
–
i
rms
Maximum AFT Voltage
Minimum AFT Voltage
AFT Detection Sensitivity
White Noise Threshold Level
Black Noise Threshold Level
Black Noise Clamp Level
SIF Output Signal Voltage
Frequency Characteristic
Differential Gain
V
17H
V = 10mV , SWEEP
11.0 11.5 12.0
i
rms
V
17L
V = 10mV , SWEEP
0
70
6.4
1.9
3.8
40
6
0.4
100
6.8
2.2
4.2
60
8
1.0
V
i
rms
Sf
V = 10mV , SWEEP
140 mV/kHz
i
rms
V
WTH
V = 10mV , SWEEP
7.2
2.5
4.6
100
–
V
V
V
i
rms
V
BTH
V = 10mV , SWEEP
i rms
V
BCL
V = 10mV , SWEEP
i rms
V
O(25)
P/S = 20dB
mV
rms
f
o
–3dB
MHz
%
DG
DP
V = 10mV
i
87.5, VIDEOMOD
87.5%, VIDEOMOD
87.5,%, VIDEOMOD
–
4
10
6
rms
rms
rms
Differential Phase
V + 10mV
i
–
3
deg
kΩ
pF
Input Resistance
R
i
V = 10mV
i
1.0
–
1.5
3.5
2.0
7.0
Input Capacitance
C
i
SIF Section
SIF Limiting Voltage
Detection Output Voltage
Distortion
V
–3dB
–
200
680
0.5
60
400
850
1.0
–
µV
rms
ilim
V
O(2)
V = 100mV , f = 400Hz, f = ±25kHz 450
i
mV
rms
rms
m
THD(2) V = 100mV , f = 400Hz, f = ±25kHz
–
%
i
rms
m
AM Rejection
AMR V = 100mV , f = 400Hz, f = ±25kHz
50
dB
i
rms
m
30%
DCVR Maximum Attenuation
AF Amp Gain
ATT
V = 200mV , f = 400Hz
70
18
3
80
20
4
–
22
–
dB
dB
i
rms
G
AF
V = 100mV , f = 400Hz
i
rms
AF Amp Output Voltage
V
O(5)
V
O(5)
THD = 10%, f = 400Hz
V
rms
Pin Connection Diagram
1
2
3
30
Ceramic Discriminator
De–Emphasis
AF Input
Ceramic Discriminator
29 Mute Attenuator
28
Mute Switch
N.F. 4
27 Ceramic Filter
26 SIF Input
5
AF Output
GND 6
IF AGC Filter 7
Mute 8
25
24
23
SIF Output
SIF VCC
VIF VCC
VIF Input 9
VIF Input 10
Mute 11
22 Video Output
21 AFT Coil
20 LLD Coil
19 LLD Coil
18 AFT Coil
17 AFT Coil
RF AGC VR 12
13
RF AGC Filter
IF AGC Filter 14
Sound Trap 15
16
Sound Trap
30
16
1
15
1.066 (27.0)
.388 (8.6)
.200
(5.08)
Max
.070 (1.78)
.125 (3.17)
.400 (10.16)
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