Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LM1246 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM1246
Description  150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
Download  51 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo 

LM1246 Datasheet(HTML) 5 Page - National Semiconductor (TI)

 
Zoom Inzoom in Zoom Outzoom out
 5 / 51 page
background image
DAC Output Electrical Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. See (Note 7)
for Min and Max parameters and (Note 6) for Typicals. DAC parameters apply to all 4 DACs.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
Min DAC
Min Output Voltage of DAC
Register Value = 0x00
0.5
0.7
V
V
Max DAC
Mode 00
Max Output Voltage of DAC
Register Value = 0xFF,
DCF[1:0] = 00b
3.7
4.2
V
V
Max DAC
Mode 01
Max Output Voltage of DAC in
DCF Mode 01
Register Value = 0xFF,
DCF[1:0] = 01b
1.85
2.35
V
∆V
Max DAC
(Temp)
DAC Output Voltage Variation
with Temperature
0 < T < 70˚C ambient
±0.5
mV/˚C
∆V
Max DAC (VCC)
DAC Output Voltage Variation
with V
CC
V
CC varied from 4.75V to 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
LSB
I
MAX
Max Load Current
−1.0
1.0
mA
System Interface Signal Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. See (Note 7)
for Min and Max parameters and (Note 6) for Typicals. DAC parameters apply to all 4 DACs.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
VTH+
VFLYBACK Positive Switching
Guarantee
Vertical Blanking triggered
2.0
V
V
SPOT
Spot Killer Voltage
Table 17. LM1246 Four-Color
Attribute Registers,V
CC Adjusted to
Activate
3.4
3.9
4.3
V
V
Ref
V
Ref Output Voltage (pin 2)
1.25
1.45
1.65
V
V
IL (SCL, SDA)
Logic Low Input Voltage
−0.5
1.5
V
V
IH (SCL, SDA)
Logic High Input Voltage
3.0
V
CC +
0.5
V
I
L (SCL, SDA)
Logic Low Input Current
SDA or SCL, Input Voltage = 0.4V
±10
µA
I
H (SCL, SDA)
Logic High Input Voltage
SDA or SCL, Input Voltage = 4.5V
±10
µA
V
OL (SCL, SDA)
Logic Low Output Voltage
I
O = 3 mA
0.5
V
f
H Min
Minimum Horizontal Frequency
PLL & OSD Functioning; PPL = 0
25
kHz
f
H Max
Maximum Horizontal Frequency
PLL & OSD Functioning; PPL = 4
110
kHz
I
HFB IN Max
Horizontal Flyback Input
Current Absolute Maximum during
Flyback
5mA
I
IN
Peak Current during Flyback
Design Value
4
mA
I
HFB OUT Max
Horizontal Flyback Input Current
Absolute Maximum during Scan
−700
µA
I
OUT
Peak Current during Scan
Not exact - Duty Cycle Dependent
−550
µA
I
IN THRESHOLD
I
IN H-Blank Detection Threshold
0
µA
t
H-BLANK ON
H-Blank Time Delay - On
+ Zero crossing of I
HFB to 50% of
output blanking start. I
24 = +1.5mA
45
ns
t
H-BLANK OFF
H-Blank Time Delay - Off
− Zero crossing of I
HFB to 50% of
output blanking end. I
24 = −100µA
85
ns
V
BLANK Max
Maximum Video Blanking Level
Test Setting 4, AC input signal
0
0.25
V
f
FREERUN
Free Run H Frequency, Including
H Blank
42
kHz
t
PW CLAMP
Minimum Clamp Pulse Width
See (Note 15)
200
ns
V
CLAMP MAX
Maximum Low Level Clamp
Pulse Voltage
Video Clamp Functioning
2.0
V
www.national.com
5


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn