NJM2255
-1-
Ver.2004-02-17
CHROMA SIGNAL HUE TINT CONTROLLER
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
NJM2255 is a Chroma signal Hue, Tint controller IC, to be used for VCR,
LCD & AV equipments.
In play back operation of video signals of VCRs, Hue and Tint of Chroma
signal can be adjusted independently and continuousely by the external
DC voltage. NJM2255 internalizes the variable capacitor in it, so that it can
be operated with minimal external components.
■ FEATURES
● Operating Voltage (+4.7V to +5.3V)
● Internalizing variable capacitor
● Internalizing changeable Gain Amplifier
● Hue and Tint of Chroma signals can be adjusted continuousely by DC voltage (0V to 5V)
● Internalizeng Dead Band Circuit
● Package Outline DIP8, DMP8
● Bipolar Technology
■ APPLICATIONS
● VCR, LCD, AV equipments
■ BLOCK DIAGRAM
■ CONTOROL INPUT - OUTPUT SIGNAL
SW1 Output Signal
H Color Main
L Color Burst
NJM2255D
NJM2255M
NJM2255
- 2 - Ver.2004-02-17
■ TEST CIRCUIT
NJM2255
-
3
-
Ver.2004-02-17
■ ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V+ 7 V
Power Dissipation PD 500 mW
Operating Temperature Range Topr -20 to +75 °C
Storage Temperature Range Tstg -40 to +125 °C
■ ELECTRICAL CHARACTERISTICS (V+ = 5V, Ta = 25°C)
SWITCH
PARAMETER SYMBOL
S1 S2 S3 S4 TEST CONDITION MIN. TYP. MAX. UNIT
Operating Current ICC 2 2 2 2 No signal - 22.0 28.0 mA
Voltage Gain 1 GC 2 2 3 2 VOUT / VIN -1.0 0 1.0 dB
Voltage Gain 2 GB 2 2 1 2 VOUT / VIN -1.0 0 1.0 dB
Hue Offset T1 2 2 2 S3 = 1 / 3 VOUT Phase difference -3.5 0 3.5 deg
Hue Changeable width 1 T2 2 3 2 S3 = 1 / 3 VOUT Phase difference 20 22 - deg
Hue Changeable width 2 T3 2 1 2 S3 = 1 / 3 VOUT Phase difference - -22 -20 deg
Tint Changeable width 1 GC 2 2 2 Gain (S3 = 3) - Gain (S3 = 1) -0.6 0 0.6 dB
Tint Changeable width 2 GB 2 2 3 Gain (S3 = 3) - Gain (S3 = 1) 4.5 5.5 - dB
Tint Changeable width 3 T1 2 2 1 Gain (S3 = 3) - Gain (S3 = 1) - - -20 dB
Hue Offset Adjustment width 1 OSTH 3 2 2 S3 = 1 / 3 VOUT - - -3.5 deg
Hue Offset Adjustment width 2 OSTL 1 2 2 S3 = 1 / 3 VOUT 3.5 - - deg
BGP Threashold Voltage 1 VTHH 2 2 3 2 Switch on level 2.2 - 5.0 V
BGP Threashold Voltage 2 VTHL 2 2 3 2 Switch off level 0 - 0.8 V
Secondary Distortion 1 HC 2 2 3 2 3.58MHz, 700mVP-P Sine Wave - -37 -33 dB
Secondary Distortion 2 HB 2 2 1 2 3.58MHz, 700mVP-P Sine Wave - -37 -33 dB
Note Unless otherwise specified, input signal is 3.58MHz and 300mVP-P sine wave.
NJM2255
- 4 - Ver.2004-02-17
■ TYPICAL CHARACTERISTICS
Hue Control Voltage vs. Tint Changeable feature Hue Control Voltage vs. Input Delay feature
Color Control Voltage
vs. Chroma Gain Changeable
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
