LTC1840 Datasheet, PDF (4/12 Pages) Linear Technology – Dual Fan Controller with 2-Wire Interface

LTC1840
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
550
T_A = 25°C
500
450
400
2.5
3.5
4.5
5.5
6.5
V_CC (V)
1840 G01
I_DACOUT FS vs V_DACOUT
at V_CC = 3V to 5V
120
T_A = 25°C
100
80
60
40
20
0
01
2
3
4
V_DACOUT (V)
56
1840 G04
I_DACOUT AC Supply Rejection at
Full Scale, V_CC = 3V DC
20
T_A = 25°C
15
Supply Current vs Temperature
(V_CC = 3V)
450
440
430
420
410
400
390
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1840 G02
I_DACOUT FS vs V_DACOUT
at V_CC = 3V
100.10
T_A = 25°C
100.05
100.00
99.95
99.90
99.85
99.80
99.75
0.5
1.5
2.5
3.5
4.5
V_DACOUT (V)
1840 G05
DAC Zero Scale Error at V_CC = 3V,
V_DACOUT = 1.1V
10
I_DACOUT Full Scale vs V_CC,
V_DACOUT = 1.1V
100.10
T_A = 25°C
100.05
100.00
99.95
99.90
2.5
3.5
4.5
5.5
6.5
V_CC (V)
1840 G03
I_DACOUT FS vs V_DACOUT
at V_CC = 5V
100.5
T_A = 25°C
100.3
100.1
99.9
99.7
99.5
99.3
99.1
012
3
4
V_DACOUT (V)
56
1840 G06
DAC DNL vs Code at V_CC = 3V
0.2
T_A = 25°C
0.1
10
5
0
5
–0.1
0
1
4
10
100
FREQUENCY (kHz)
1000
1840 G07
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1840 G08
–0.2
1
CODE
255
1840 G09
1840f