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NJM2536AM

P1-P3P4-P6P7-P9
NJM2536A
- 1 -
RF Modulator for VHF Band
DESCRIPTION
The NJM2536A is a RF modulator IC especially designed for VHF
band RF modulator and consists of video clamp circuit, white clip circuit,
video AM modulator and audio FM modulator, built into one chip.
FEATURES
• Operating Voltage 5V
• Picture-to-sound ratio is adjustable
• VHF Oscillator on chip
• Carrier-off switch function on chip
• Regulator on chip
• Bipolar Technology
• Package Outline:DMP/SSOP14
BLOCK DIAGRAM
PACKAGE OUTLINE
NJM2536AV
NJM2536AM
VCC
CH SW
CH2
CH1
GND2
REG OUT
4.5MHz
TANK
VIDEO IN
CARRIER
ANT SW
RF OUT
GND1
P/ S
AUDIO IN
12 34 567
814 13 12 11 10 9
RF OSC
REGULATOR
DRIVE
OFF SW
CLAMP &
MIXER
CARRIER
OFF SW
AUDIO FM
MODULA TOR
WHITE CLIP
NJM2536A
- 2 -
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C)
Parameter Symbol Ratings Unit
Supply Voltage V
CC
7 V
Power Dissipation P
D
300 mW
Input Voltage V
I
-0.3 to V
CC
V
Operating Temperature Range T
opr
-20 to +75
°C
Storage Temperature Range T
stg
-40 to +125
°C
RECOMMENDED OPERATING VOLTAGE RANGE
(T
A
=25°C)
Parameter Condition Symbol Min. Typ. Max. Unit
Operating Voltage V
CC
4.5 5.0 5.5 V
ELECTRICAL CHARACTERISTICS
(V
CC
=5V,T
A
=25°C)
Parameter Condition Symbol Min. Typ. Max. Unit
Operating Current
No video/audio input signal,
CARRIER OFF SW(Pin2)=5V
I
CC
13.5 16.0 22.5 mA
ANT SW DRIVE
Output Voltage –1
CARRIER OFF SW(Pin2)=5V
I
D
=26mA
V
ANT1
3.7 4.0 4.3 V
ANT SW DRIVE
Output Voltage –2
CARRIER OFF SW(Pin2)=Open
V
CC
=2V
V
ANT2
0 0.065 0.1 V
Video Output Level
(Note 1)
Video input signal(Pin1)=0.5V
PP
V
O
(83) 86 (89) dBu
Video Modulation Depth
(Note 1)
Video input signal(Pin1)=0.5V
PP
mp (70) 76 (82) %
Video Limiter Modulation
Depth (Note 1)
Video input signal(Pin1)=1.0V
PP
mpmax (85) 94 (98) %
Differential Gain
Video input signal(Pin1)=0.5V
PP
Staircase
DG -
±3
- %
Differential Phase
Video input signal(Pin1)=0.5V
PP
Staircase
DP -
±3
- deg
Picture-to-sound Ratio
(Note 1)
Video input signal(Pin1)=0.5V
PP
PS (11) 13 (15) dB
Sound FM Modulation
Sensitivity
Deviation of fs per 100mV
βb
- 0.51 - KHz/mV
Audio Distortion
Audio input signal(Pin7)=0.05V
PP
1kHz sine wave
THD - 0.3 - %
Audio Signal-to-noise
Ratio
Sound Modulation 60%
1kHz sine wave
ASN - 60 - dB
Maximum Sound FM
Modulation
Audio input signal(Pin7)=1.0V
PP
1kHz sine wave
msmax - 700 - %
(Note 1) Because AC characteristics largely depends on application circuit, these parameters are specified
by the DC characteristics as shown in next page.
NJM2536A
-
3
-
DC ELECTRICAL CHARACTERISTICS
(V
CC
=5V,Pin2=2.5V, T
A
=25°C, otherwise noted. All measurements
performed in the DC test circuit are shown in next page)
Parameter Condition (Note 2) Symbol Min. Typ. Max. Unit
Video Output Signal
Amplitude 1
Gvv1=Gvvh1-Gvvl1 Gvv1 62.4 85 124.5 mV
Video Output Signal
Amplitude 2
Gvv2=Gvvh2-Gvvl2 Gvv2 62.4 85 124.5 mV
Video Modulation Depth
Mp=((Gvv1-Mw)/Gvv1)x100
where Mw=Mwh-Mwl
Mp 70 76 82 %
Video Limiter Modulation
Depth (Note 2)
Mpmax=((Gvv1-Wc)/Gvv1)x100
where Wc=Wch-Wcl
Mpmax 85 94 98 %
Picture-to-sound Ratio Ps=Psh-Psl Ps -70 -45 -35.1 mV
(Note 2) Explanation of symbols
• Vv : VIDEO IN output voltage at Pin1
• V11h : CH1 output voltage at Pin11
CH SW (Pin13) input = 2.5V
• V12h : CH1 output voltage at pin12
CH SW (Pin13) input = 0.5V
• Gvvh1: RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V
• Gvvl1 : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V
• Gvvh2 : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv, CH2 (Pin12) = V12h + 0.15V, CH SW (Pin13) input = 0.5V
• Gvvl2 : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv, CH2 (Pin12) = V12h - 0.15V, CH SW (Pin13) input = 0.5V
• Mwh : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv + 0.43V, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V
• Mwl : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv + 0.43V, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V
• Wch : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv + 0.8V, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V
• Wcl : RF OUT output voltage at Pin4
VIDEO IN (Pin 1) input = Vv + 0.8V, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V
• VPs : P/S output voltage at Pin6
CARRIER OFF SW (Pin 2) input = 2.5V
• Psh : RF OUT output voltage at Pin4
P/S (Pin 6) input = VPs + 0.2V, CH1 (Pin11) = 2.4V, CH SW (Pin13) input = 2.5V
• Psl : RF OUT output voltage at Pin4
P/S (Pin 6) input = VPs - 0.2V, CH1 (Pin11) = 2.4V, CH SW (Pin13) input = 2.5V
P1-P3P4-P6P7-P9

NJM2536AM

Mfr. #:
Buy NJM2536AM
Manufacturer:
NJR (New Japan Radio)
Description:
Video ICs RF Mod for VHF
Lifecycle:
New from this manufacturer.
Delivery:
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