Datasheet

5
LTC1923
1923f
TEMPERATURE (°C)
–50
165
OSCILLATOR FREQUENCY (kHz)
185
205
225
265
–20
10 40 70
1923 G01
100 130
245
C
T
= 330pF
R
T
= 10k
R
T
(kΩ)
5
0
OSCILLATOR FREQUENCY (kHz)
200
600
800
1000
15
1800
1923 G02
400
10 20
1200
1400
1600
C
T
= 68pF
C
T
= 150pF
C
T
= 330pF
V
DD
= 2.7V, 5V
T
A
= 25°C
TEMPERATURE (°C)
V
REF
(V)
2.495
2.500
1923 G03
2.490
2.485
2.510
2.505
–50
–20
10 40 70 100 130
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
REF
vs I
REF
for Different
Temperatures Output Dead Time vs R
T
Error Amplifier Offset Voltage
vs Temperature
Open Thermistor Threshold
vs Temperature
Output Rise/Fall Time vs R
SLEW
Shorted Thermistor Threshold
vs Temperature
I
REF
(mA)
0
V
REF
(V)
10
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475
2.470
1923 G04
515
T
A
= 125°C
T
A
= 25°C
T
A
= –50°C
R
T
(kΩ)
5
DEAD TIME (ns)
125
15
1923 G05
100
75
25
7.5
10
12.5
50
150
V
DD
= 2.7V
V
DD
= 5V
T
A
= 25°C
0
RISE TIME (ns)
100
150
1923 G06
50
0
100
200
300
250
200
R
SLEW
(kΩ)
T
A
= 25°C
TEMPERATURE (°C)
–50
–1.0
ERROR AMPLIFIER V
IO
(mV)
–0.5
0
0.5
1.0
1.5
–20
10 40 70
1923 G07
100 130
TEMPERATURE (°C)
–50
4.55
OPEN THERMISTOR THRESHOLD (V)
4.56
4.57
4.58
4.59
4.60
–20
10 40 70
1923 G08
100 130
V
SET
= 5V
TEMPERATURE (°C)
–50
0.95
SHORTED THERMISTOR THRESHOLD (V)
0.96
0.97
0.98
0.99
1.00
–20
10 40 70
1923 G09
100 130
V
SET
= 5V
Oscillator Frequency
vs Temperature
Oscillator Frequency vs R
T
V
REF
vs Temperature