LM1229VEC National Semiconductor, LM1229VEC Datasheet - Page 7

• Manufacturer Part Number: LM1229VEC
• Description: I2C Compatible CMOS TV RGB and Deflection Processor
• Manufacturer: National Semiconductor

I
I
V
I
I
I
I
t
t
V
t
V
V
I
I
t
V
V
V
V
V
V
L
H
FB THRESHOLD
FB IN MAX
FB IN MAX
FB OUT MAX
H-BLANK ON
H-BLANK OFF
PW CLAMP
CLAMP LOW
CLAMP HIGH
CLAMP-VIDEO
OL
BLANK MAX
CLAMP MAX
CLAMP MIN
HEHT-LOW
HEHT-HIGH
VEHT1-LOW
VEHT2-LOW
VEHT1-HIGH,
VEHT2-HIGH
System Interface Signal Characteristics
Unless otherwise noted: T
for Min and Max parameters and (Note 6) for Typicals.
Note 1: Limits of Absolute Maximum Ratings indicate below which damage to the device will not occur.
Note 2: All voltages are measured with respect to GND, unless otherwise specified.
Note 3: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Input from signal generator: t
Note 6: Typical specifications are specified at +25˚C and represent the most likely parametric norm.
Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. The guaranteed specifications apply only for the test conditions
listed. Some performance characteristics may change when the device is not operated under the listed test conditions.
Note 8: The supply current specified is the quiescent current for V
therefore all the supply current is used by the pre-amp.
Note 9: Linearity Error is the maximum variation in step height of a 16 step staircase input signal waveform with a 0.7 V
with each at least 100 ns in duration.
Note 10: dt/dV
Note 11: ∆A
gain change between any two amplifiers with the contrast set to A
gains might be 12.1 dB, 11.9 dB, and 11.8 dB and change to 2.2 dB, 1.9 dB and 1.7 dB respectively for contrast set to A
10.0 dB with a tracking change of
Note 12: The ABL input provides smooth decrease in gain over the operational range of 0 dB to −5 dB: ∆A
the gain characteristics, linearity and pulse response may depart from normal values.
Symbol
,
V
track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three gain stages. It is the difference in
CC
= 200*(t
Logic low input current
(SCL, SDA, HSYNC, VSYNC)
Logic high input current
(SCL, SDA, HSYNC, VSYNC)
Logic low output voltage (SCL,
SDA)
I
24)
Flyback input
Peak flyback input current
Flyback input current
Blanking time delay - on
Blanking time delay - off
Maximum video blanking level
Minimum clamp pulse width
Maximum low level clamp voltage
Minimum high level clamp voltage
Clamp gate low input current
Clamp gate high input current
Minimum wait from end of clamp
pulse to start of video.
Low limit of pin 20 HEHT input
High limit of pin 20 HEHT input
Low limit of pins 8 and 9 VEHT
inputs
High limit of pins 8 and 9 VEHT
inputs
IN
blank detection threshold (pin
5.5V
–t
4.5V
A
±
= 25˚C, V
0.2 dB.
)/((t
Parameter
r
, t
5.5V
f
<
1 ns.
+ t
4.5V
CC
)) %/V, where: t
= +5.0V, V
V 50%
IN
5.5V
CC
= 0.7V, V
SDA or SCL, Input Voltage = 0V
SDA or SCL, Input Voltage = 5.0V
I
Absolute maximum current during
flyback
Design value - AC coupled
Absolute maximum during scan
+ Zero crossing of I
output blanking start. I
− Zero crossing of I
output blanking end. I
CONTRAST[6:0], RGAIN[6:0],
GGAIN[6:0], BGAIN[6:0] = 0x7F,
BRIGHTNESS[7:0] = 0x00,
OFFSET[3:0] = 0xC, AC input
signal.
See (Note 15)
To guarantee low state
To guarantee high state
V
V
Referenced to RGB video inputs.
O
= 5V and with R
is the rise or fall time at V
and measured relative to the A
23
23
= 3 mA
= 0V
= 5.0V
7
ABL
Conditions
= V
(Continued)
L
=
∞
CC
. Load resistors are not required and are not used in the test circuit,
, C
FB
FB
CC
FB
FB
L
to 50% of
to 50% of
= 5.5V, and t
= 10 pF, Video Outputs = 2.4 V
= −100 µA
V MAX
= +1.5 mA
ABL
condition. For example, at A
= A
V MAX
4.5V
is the rise or fall time at V
– A
V 50%
−500
Min
P-P
200
3.0
V
50
0
(V
level at the input. All 16 steps equal,
. This yields a typical gain change of
ABL
= V
−0.4
ABL MIN GAIN
Typ
±
±
−20
0.5
1.0
0.4
1.4
3.4
50
50
1
4
10
10
V MAX
P-P
the three amplifiers’
CC
. See (Note 7)
Max
0.25
). Beyond −5 dB
1.0
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= 4.5V.
5
Units
mA
mA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
V
V
V
V
V
V
V
V