LTC1923 LINER [Linear Technology], LTC1923 Datasheet - Page 5

• Manufacturer Part Number: LTC1923
• Description: High Efficiency Thermoelectric Cooler Controller
• Manufacturer: LINER [Linear Technology]

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