ADM8845(RevD) Ver la hoja de datos (PDF) - Analog Devices
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ADM8845 Datasheet PDF : 18 Pages
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ADM8845
TYPICAL PERFORMANCE CHARACTERISTICS
35
30
25
20
15
10
5
4.75
6.75
8.75
10.75
12.75
14.75
RSET (k)
Figure 3. LED Current vs. RSET
20.35
20.30
20.25
–40C
20.20
20.15
20.10
25C
85C
20.05
20.00
2.6
3.1
3.6
4.1
4.6
5.1
5.6
SUPPLY VOLTAGE (V)
Figure 4. LED Current vs. Supply Voltage Over Various Temperatures,
Six LEDs Enabled
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–40
–20
0
25
45
65
85
TEMPERATURE (C)
Figure 5. LED Current Matching over Temperature, VCC = 3.6 V, ILED = 20 mA,
Six LEDs Enabled
Data Sheet
0.4
0.3
MAX POSITIVE MATCHING ERROR
0.2
0.1
0
–0.1
–0.2
MAX NEGATIVE MATCHING ERROR
–0.3
–0.4
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
SUPPLY VOLTAGE (V)
Figure 6. ILED Matching Error vs. Supply Voltage,
TA = 25°C and ILED = 20 mA
20.24
20.22
20.20
20.18
20.16
20.14
20.12
20.10
20.08
–40
0
40
80
TEMPERATURE (C)
Figure 7. LED Current Variation over Temperature, VCC = 3.6 V
35
30
25
20
15
10
5
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
SUPPLY VOLTAGE (V)
Figure 8. Lead Current vs. Supply Voltage
Rev. D | Page 6 of 18
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