LT1249 Ver la hoja de datos (PDF) - Linear Technology
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LT1249 Datasheet PDF : 12 Pages
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LT1249
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ....................................................... 27V
GTDR Current Continuous ..................................... 0.5A
GTDR Output Energy (Per Cycle) ............................. 5µJ
IAC Input Current ................................................. 20mA
VSENSE Input Voltage ............................................ VMAX
MOUT Input Current.............................................. ± 5mA
Operating Junction Temperature Range
LT1249C ................................................ 0°C to 100°C
LT1249I ........................................... – 40°C to 125°C
Thermal Resistance (Junction-to-Ambient)
N8 Package ................................................ 100°C/W
S8 Package ................................................. 120°C/W
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
GND 1
CAOUT 2
MOUT 3
IAC 4
8 GTDR
7 VCC
6 VSENSE
5 VAOUT
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 100°C/W (N8)
TJMAX = 125°C, θJA = 120°C/W (S8)
ORDER PART
NUMBER
LT1249CN8
LT1249IN8
LT1249CS8
LT1249IS8
S8 PART
MARKING
1249
1249I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the operating temperature
range, otherwise specifications are at TA = 25°C. Maximum operating voltage (VMAX) = 25V, VCC = 18V, IAC = 100µA, CAOUT = 3.5V,
VAOUT = 5V, no load on any outputs, unless otherwise noted.
PARAMETER
Overall
Supply Current (VCC in Undervoltage Lockout)
Supply Current, On
VCC Turn-On Threshold
VCC Turn-Off Threshold
Voltage Amplifier
VSENSE Bias Current
Voltage Amp Gain
Voltage Amp Unity-Gain Bandwidth
Voltage Amp Output High
Voltage Amp Output Low
Voltage Amp Source Current
Voltage Amp Sink Current Threshold
Voltage Amp Sink Current Hysteresis
Current Amplifier
Current Amp Offset Voltage
Current Amp Transconductance
Current Amp Voltage Gain
Current Amp Source Current
Current Amp Sink Current
Current Amp Output High
Current Amp Output Low
CONDITIONS
VCC = Lockout Voltage – 0.2V
11.5V ≤ VCC ≤ VMAX, CAOUT = 1V
VSENSE = 0V to 7V
0 ≤ Source Current ≤ 50µA
0 ≤ Sink Current ≤ 5µA
Linear Operation, 2V < VAOUT < 10V
2V < VAOUT < 10V
∆ICAOUT = ±40µA
2.5V ≤ VCAOUT ≤ 7.5V
VMOUT = 1V, IM = 0µA
VMOUT = – 0.3V, IM = 0µA
MIN TYP MAX
q
0.25 0.45
q
9
12
q 15.5 16.5 17.5
q
9.5
10.5 11.5
q
–25 –250
70
100
1.5
q
10
12
q
0.1
0.4
q 130
260
450
q
33
44
57
q
14
22.5
30
q
±2
± 15
q 150
320
550
500 1000
100 145 220
67
95
125
7.4
8.1
1.2
2
UNITS
mA
mA
V
V
nA
dB
MHz
V
V
µA
µA
µA
mV
µmho
V/V
µA
µA
V
V
2
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