LM1229
I
2
C Compatible CMOS TV RGB and Deflection Processor
General Description
The LM1229 pre-amp is an integrated CMOS CRT RGB
preamp plus horizontal and vertical deflection processing
with an I
2
C compatible interface for controlling all the param-
eters necessary to directly adjust the gain, contrast and
brightness and geometry of the CRT display.
In the RGB section, the CRT bias is controlled by the three
DAC outputs which are matched to the LM248x integrated
bias clamp ICs. The brightness control operates on the video
channels rather than the bias channels and is designed to
maintain the CRT color temperature through the full range of
adjustment. The On Screen Display inputs accept either
digital or analog input levels. Black level clamping of the
video signal is carried out directly on the AC coupled input
signal into the high impedance preamplifier input, thus elimi-
nating the need for additional clamp capacitors. Blanking
inputs are provided which can accept both horizontal and
vertical flyback inputs for composite blanking of the video. A
vertical blanking output pulse is provided which can drive a
G1 blanking amplifier such as the one in National's LM2485
clamp IC. The LM1229 RGB outputs are compatible with
National's high gain drivers (http://www.national.com).
The Deflection section uses a 12.0 MHz resonator and with
it the horizontal processor is capable of locking to seven
different television signal formats, 15.734, 28.1, 31.468,
33.7, 37.9, 45.0, and 48.08 kHz by configuring two external
tri-state pins. The resonator frequency can be scaled up or
down by as much as 5% to accommodate custom scan
frequencies, however all scan modes will be scaled up or
down by the same percentage. Additional inputs are pro-
vided for H and V synchronization, X-Ray protection, V scan
protection, and H and V EHT compensation. Deflection out-
put signals are provided for horizontal drive, variable ampli-
tude vertical ramp, vertical ramp reference voltage, variable
amplitude dynamic focus, and E-W correction with DC level
adjustment for size.
A status register is also provided for the system microcon-
troller to read and check for failure conditions.
The IC is packaged in an industry standard 64 lead LQFP
molded plastic package.
Features
n
Fully bus controllable via an I
2
C compatible interface.
n
Contrast control for simultaneously adjusting the RGB
output peak to peak levels.
n
Gain controls for aligning the CRT color temperature.
n
Color tracking brightness control for maintaining color
temperature throughout the full range of adjustment.
n
Black level clamping to ensure output level stability. The
polarity of the logic pulse input is register selectable.
n
Digital or analog RGB OSD inputs, with adjustable
transparency available in the digital mode and clamping
in the analog mode for black level stability.
n
Choice of four levels of OSD amplitude.
n
Window highlight using the OSD Transparency feature.
n
ABL input for reducing the video contrast when the CRT
beam current exceeds the predetermined threshold set
by an external resistor.
n
Horizontal and/or vertical blanking directly from
deflection signals. The blanking can be disabled, if
desired.
n
Matched to National's driver and clamp IC families
(http://www.national.com).
n
Black level output adjustable from 0.5V to 1.4V for
compatibility with NSC CRT driver IC's with or without
PNP transistor buffers.
n
Three DAC outputs for setting CRT cathode bias, which
can be set to full or half scale like the LM1267 series of
preamplifiers.
n
Spot killer which blanks the video outputs when V
CC
falls below the specified threshold.
n
RGB Power Saving Mode with 35% power reduction.
n
Support for seven different TV signal formats.
n
RGB blanking for scan loss protection.
n
I
2
C control over horizontal and vertical position and size,
pincushion, pin balance, trapezoidal, parallelogram, top
and bottom corner corrections, vertical S and C
correction, and dynamic focus amplitude.
n
Programmable duration 5V vertical blanking output
pulse.
n
Uses a low cost resonator.
n
Status register indicating vertical scan loss, X-Ray,
horizontal flyback and horizontal lock status.
n
Blanks the RGB outputs whenever the loss of vertical
scan is detected.
n
Independent control over horizontal and vertical sync
input polarities.
Applications
n
Television deflection and RGB video processing with
National's CRT drivers.
June 2005
LM1229
I
2
C
Compatible
CMOS
TV
RGB
and
Deflection
Processor
2005 National Semiconductor Corporation
DS201187
www.national.com
LM1229 Package and Pinout
20118701
Non-Exposed DAP -- Order Number LM1229VEC
Non-Exposed DAP -- NS Package Number VEC64A
Exposed DAP -- Order Number LM1229YA
Exposed DAP -- NS Package Number VXE64A
FIGURE 1.
LM1229
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2
Absolute Maximum Ratings
(Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage V
CC
, Pins 12, 27, 30,
49, 56, 61, 63
6.0V
Peak Video DC Output Source Current
(Any One Amp) Pins 57, 58 or 59
1.0 mA
Voltage at Any Input Pin (V
IN
) V
CC
0.5V
V
IN
V
CC
+0.5V
Video Inputs (pk-pk)
0V
V
IN
1.2V
Power Dissipation (P
D
)
(Above 25C Derate Based
on
JA
and T
J
)
1.8W
Thermal Resistance LM1229VEC (
JA
)
35 C/W
Thermal Resistance LM1229YA (
JA
)
DAP not soldered
41 C/W
Thermal Resistance LM1229YA (
JA
)
DAP soldered
27 C/W
Junction Temperature (T
J
)
150C
ESD Susceptibility (Note 4)
3.5 kV
ESD Machine Model (Note 13)
350V
Storage Temperature
-65C to +150C
Lead Temperature (Soldering, 10 sec.)
265C
Operating Ratings
(Note 3)
Temperature Range
0C to +70C
Supply Voltage V
CC
4.75V
V
CC
5.25V
Video Inputs (peak-peak)
0V
V
IN
1.0V
Video Signal Electrical Characteristics
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V, V
IN
= 0.70 V
P-P
, V
ABL
= V
CC
, C
L
= 10 pF, Video Outputs = 2.4 V
P-P
. See
(Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
S
Supply current
No output loading. See (Note 8).
260
330
mA
I
S-PS
Supply current, power save
mode.
No output loading. See (Note 8).
100
125
mA
V
OB TYP
Active video black level output.
No input signal, DC offset = 0x3.
1.25
V
V
OB MIN
Active video minimum black level
output.
No input signal, DC offset = 0xF(min).
0.5
V
V
OB MAX
Active video maximum black level
output.
No input signal, DC offset = 0x0(max).
1.45
V
V
OB STEP
Active video black level step size. No input signal. Varying DC offset.
65
mV
V
OB MIN BRITE
Active video minimum black level
output.
No input signal, DC offset = 0x3,
gain = 0x7F, brightness.= 0xFF(min).
0.8
V
V
OB MAX BRITE
Active video maximum black level
output.
No input signal, DC offset = 0x3,
gain = 0x7F, brightness.= 0x00(max).
1.65
V
V
OBB STEP
Active video brightness step size. No input signal, DC offset = 0x3,
varying brightness.
6.3
mV
V
O MAX
Maximum video output.
Video in = 0.70 V
P-P
, contrast = 0x7F,
brightness = 0x0, DC offset = 0x3
4.75
V
LE
Linearity error.
Staircase input signal. See (Note 9).
5
%
t
R
Video rise time.
(Note 5), 10% to 90%, AC input
signal.
8
ns
OS
R
Rising edge overshoot.
(Note 5), AC input signal.
2
%
t
F
Video fall time.
(Note 5), 90% to 10%, AC input
signal.
8
ns
OS
F
Falling edge overshoot.
(Note 5), AC input signal.
2
%
BW
Channel bandwidth (-3 dB)
(Note 5), AC input signal.
70
MHz
SEP
10 kHz
Video amplifier 10 kHz isolation.
(Note 14).
70
dB
SEP
10 MHz
Video amplifier 10 MHz isolation.
(Note 14).
50
dB
A
V MAX
Maximum voltage gain.
Video in = 0.70 V
P-P
, Maximum
contrast and gain, V
ABL
= 5.0V.
4.35
V/V
A
V 50% CONT
Contrast attenuation
@
50%.
Maximum gain, V
ABL
= 5.0V.
5.15
dB
A
V MIN
/
A
V MAX
Maximum contrast attenuation.
Maximum gain, V
ABL
= 5.0V.
20.5
dB
A
V 50% GAIN
Gain attenuation
@
50%.
Maximum contrast, V
ABL
= 5.0V.
4.15
dB
LM1229
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3
Video Signal Electrical Characteristics
(Continued)
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V, V
IN
= 0.70 V
P-P
, V
ABL
= V
CC
, C
L
= 10 pF, Video Outputs = 2.4 V
P-P
. See
(Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
A
V MIN GAIN
/
A
V MAX GAIN
Maximum gain attenuation.
Maximum contrast, V
ABL
= 5.0V.
12
dB
A
V MATCH
Maximum gain match between
channels.
Maximum contrast, V
ABL
= 5.0V.
0.6
dB
A
V TRACK
Gain tracking channel to channel. AC input signal. See (Note 11).
0.6
dB
V
ABL HIGH
ABL control range upper limit.
(Note 12), AC input signal.
4.5
V
V
ABL LOW
ABL control range lower limit.
(Note 12), AC input signal.
2.5
V
A
V 2.5
/A
V MAX
ABL Gain Reduction at V
ABL
=
2.5V.
(Note 12), AC input signal.
-5.8
dB
I
ABL ACTIVE
ABL input bias current during
ABL.
(Note 12), AC input signal. V
ABL
=
2.5V
10
A
I
ABL MAX
ABL input current sink capability.
(Note 12), AC input signal.
1.0
mA
A
V ABL TRACK
ABL channel to channel gain
tracking error.
Input signal = 0.7 V
P-P
, ABL voltage
set to 4.5V and 3.0V.
0
7.5
%
R
IP
Minimum input resistance (pins
45, 46, 47)
20
M
OSD Electrical Characteristics
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DIGITAL MODE
V
LOW
Maximum low input voltage,
(OSD and Enable).
Enable: video inputs selected
OSD: OSD black displayed
1.0
V
V
HIGH
Minimum high input voltage,
(OSD and Enable).
Enable: OSD inputs selected
OSD: OSD colors displayed
3.0
V
V
OSD-11
OSD output amplitude.
OSD Enable = 1, OSD Contrast =
11.
2.65
V
V
OSD-10
OSD output amplitude.
OSD Enable = 1, OSD Contrast =
10.
2.35
V
V
OSD-01
OSD output amplitude.
OSD Enable = 1, OSD Contrast =
01.
2.15
V
V
OSD-00
OSD output amplitude.
OSD Enable = 1, OSD Contrast =
00.
1.75
V
V
OSD-AUX
OSD output amplitude (AUX).
OSD Enable = 1, OSD[5] = 1
3.0
V
V
OSD BLACK
Difference between OSD and video
black levels.
Same channel, contrast and gain =
0x60
-85
100
mV
V
OSD WHITE
Output Match between channels.
OSD Contrast = 11, maximum
difference between R, G and B
3
%
V
OSD TRACK
Output Variation between channels. OSD contrast varied from max to
min
3
%
HT
MAX
OSD background video maximum
level.
OSD[3] = 1, OSD TRANS = 0x7F.
See (Note 18).
100
%
HT
MIN
OSD background video minimum
level.
OSD[3] = 1, OSD TRANS = 0x00.
See (Note 18).
10
%
ANALOG MODE
A
V ANALOG OSD
Analog gain from pins 41, 42, 43 to
the video outputs, with input level
0.7 V
PP
.
OSD Enable = 1, Gains at
maximum.
3.75
V/V
LM1229
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4
OSD Electrical Characteristics
(Continued)
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
BOTH MODES
I
LOW
Low input current (OSD and
Enable).
V
IN
= 0V
-3.0
A
I
HIGH
High input current (OSD and
Enable).
V
IN
= 5V
.001
A
SEP
10 kHz
Crosstalk from video
@
10 kHz.
See (Note 17).
-70
dB
SEP
10 MHz
Crosstalk from video
@
10 MHz.
See (Note 17).
-50
dB
DAC Output Electrical Characteristics
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V, V
IN
= 0.7V, V
ABL
= V
CC
, C
L
= 10 pF, Video Outputs = 2.4 V
P-P
. See (Note 7)
for Min and Max parameters and (Note 6) for Typicals. DAC parameters apply to all 3 DACs.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
DAC MIN
Minimum DAC output voltage
Register Value = 0x00
0.5
V
V
DAC MAX MODE 0
Maximum DAC output voltage (full
scale)
Register Value = 0xFF,
GLOBAL[5] = 0.
4.2
V
V
DAC MAX MODE 1
Maximum DAC output voltage (half
scale)
Register Value = 0xFF,
GLOBAL[5] = 1.
2.1
V
V
DAC TEMP
DAC output voltage variation with
temperature
0C
<
T
<
70C ambient
0.5
mV/C
V
DAC VCC
DAC output voltage variation with
V
CC
4.75V
V
CC
5.25V,
DAC register set to mid-range
(0x7F)
50
mV
Linearity
Linearity of DAC over its range
5
%
Monotonicity
Monotonicity of the DAC excluding
dead zones
-0.5
+0.5
LSB
I
MAX
Maximum DAC output load current
1.0
mA
Deflection Signal Characteristics
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V, V
IN
= 0.7V, V
ABL
= V
CC
, C
L
= 10 pF, See (Note 7) for Min and Max param-
eters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
f
XTL
Ceramic resonator input frequency
12
MHz
V
HFB
Switching threshold for detecting
horizontal flyback on pin 18.
2.4
V
t
FW
Flyback Width
1
s
V
VFB-DC
DC bias point of VFB input
1.25
V
V
VFB-SW
Switching threshold for detection
1.75
V
V
X-RAY
X-Ray Threshold Voltage
Above V
X-RAY
the HDRIVE output is
disabled (high)
2.5
3.2
V
V
CCforXRAYRESET
X-Ray Reset
V
CC
required to reset X-Ray
4
V
f
FR
Free-run frequency tolerance
(ceramic resonator tolerance)
1
%
f
CR
PLL capture range
6
%
t
HDPHASE
Horizontal phase control range
All scan frequencies
25
%T
H
t
PARCOR
Maximum parallelogram correction
Measured at 31 kHz
1
s
t
BOWCOR
Maximum pin balance (bow)
correction
Measured at 31 kHz
0.5
s
H
EHT-
HEHT phase shift left (R
EHT
= 20k)
HEHT[3:0] = 0011b and V
20
= 1.5V
-2.7
%T
H
H
EHT+
HEHT phase shift right (R
EHT
=
20k)
HEHT[3:0] = 0111b and V
20
= 3.5V
2.8
%T
H
V
HDOL
HDRIVE Max low level output
I
OL
= 10 mA
0.7
V
LM1229
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