May 1999
T
UCT
ROD ACEMEN 47
P
LETE
2-77
EPL
BSO NDED R 1-800-44
O
ME
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CA3126
TV Chroma Processor
[ /Title
(CA31
26)
/Sub-
ject
(TV
Chrom
a Pro-
cessor)
/Autho
r ()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
TV
chroma
pro-
cessor,
subcar-
rier
regen-
era-
tion,
ntsc,
acc,
over-
load
detec-
tor,
keyed
chroma
out-
put,
color
proces-
sor,
indus-
trial
Features
• Phase Locked Subcarrier Regeneration Utilizes
Sample-and-Hold Techniques
• Automatic Chrominance Control (ACC)/Killer Detector
Employs Sample-and-Hold Techniques
• Supplementary ACC with an Overload Detector to
Prevent Oversaturation of this Picture Tube
• Sinusoidal Subcarrier Output
• Keyed Chroma Output
• Emitter Follower Buffered Outputs for Low Output
Impedance
• Linear DC Saturation Control
Description
The Harris CA3126 is a monolithic silicon integrated circuit
designed for TV chroma processing and is ideally suited for
NTSC color graphic applications that require subcarrier
regeneration of the color burst signal.
Part Number Information
PART NUMBER
CA3126E
CA3126M1
TEMP.
RANGE (
o
C)
-40 to 85
-40 to 85
PACKAGE
16 Ld PDIP
20 Ld SOIC
PKG.
NO.
E16.3
M20.3
Applications
• TV/CATV Receiver Circuits
• NTSC Color Decoder/Processor
• Computer Graphics Subcarrier Regenerator
• Timing Reference for Frame Grabbers
• DSP Clock Timing Reference Source
Pinouts
CA3126
(PDIP)
TOP VIEW
CA3126
(SOIC)
TOP VIEW
CHROMA IN
AFPC FILTER +
AFPC FILTER -
RF BYPASS
GROUND
VCO OUT
VCO IN
CARRIER OUT
1
2
3
4
5
6
7
8
16 CHROMA GAIN CONT.
15 CHROMA OUT
14 ZENER REF
13 OVERLOAD DET.
CHROMA IN
AFPC FILTER +
NC
AFPC FILTER -
RF BYPASS
1
2
3
4
5
6
7
8
9
20 CHROMA GAIN CONT.
19 CHROMA OUT
18
17
16
15
14
13
12
NC
ZENER REF
OVERLOAD DET.
V+
ACC +
ACC -
HORIZ. KEY IN
12 V+
GROUND
11 ACC+
VCO OUT
10 ACC-
9
HORIZ. KEY IN
VCO IN
NC
NC 10
11 CARRIER OUT
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1999
File Number
860.5
8-33
CA3126
Absolute Maximum Ratings
DC Supply Voltage (V+ to GND) (Note 1). . . . . . . . . . . . . . . . . 13.2V
DC Current:
Into V+ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38mA
Into Zener Reference Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
DC Voltage (Horizontal Key In)
Negative Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5V
Positive Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V
Thermal Information
Thermal Resistance (Typical, Note 1)
θ
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
85
Maximum Junction Temperature (Plastic Packages) . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
(SOIC - Lead Tips Only)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. This rating does not apply when using the internal zener reference in conjunction with an external pass transistor.
2.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
T
A
= 25
o
C, Chroma Gain Control at maximum position for all tests except as noted. Electrical
specifications referenced to test circuit.
SWITCH POS.
S
1
S
2
V
CHROMA
INPUT TP
1
MIN
TYP
MAX
UNITS
PARAMETER
TERMINAL,
MEASUREMENT
AND SYMBOL
DC ELECTRICAL SPECIFICATIONS
Voltage Regulator
Supply Current
V
12
I
12
2
2
2
2
0
0
10.1
16
11.2
25
12.1
38
V
mA
SWITCHING ELECTRICAL SPECIFICATIONS
(Note 3)
Pull-In Range (Note 4)
Oscillator Output
100% Chroma Output
Overload Detector
Minimum Chroma Output
(Note 5)
200% Chroma Output
20% Chroma Output
Kill Level
NOTES:
3. Except for pull-in range testing, tune oscillator trimmer capacitor for free running frequency of 3.579545MHz
±10Hz.
4. Set Switch 1 to Position 2, detune oscillator
±250Hz,
set Switch 1 to Position 1, and check for oscillator pull-in.
5. Set Chroma Gain Control to minimum position (CCW).
V
8
V
8
V
15
V
15
V
15
V
15
V
15
V
TP1
(Note 6)
2
1
1
1
2
2
2
1
2
0.5V
P-P
0
0.5V
P-P
0.5V
P-P
0.5V
P-P
1V
P-P
0.1V
P-P
Vary
±250
0.6
1.4
0.4
-
-
1.0
2.7
-
-
-
-
-
0.7
20
Hz
V
P-P
V
P-P
V
P-P
mV
P-P
% of
100%
Reading
mV
P-P
1
1
1
2
2
2
70
40
5
100
-
-
140
105
60
8-34
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