Datasheet

ADM8845
Rev. C | Page 6 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
5
10
15
20
25
30
35
10.75
04867-0-004
R
SET
(k)
LED CURRENT (mA)
4.75 6.75 12.75 14.758.75
Figure 3. I
LED
(mA) Current vs. R
SET
20.00
20.10
20.15
20.20
20.25
20.30
20.35
4.1
04867-0-005
SUPPLY VOLTAGE (V)
LED CURRENT (mA)
2.6 3.1 4.6 5.63.6 5.1
–40C
25C
85C
20.05
Figure 4. I
LED
(mA) vs. Temperature (°C), Six LEDs Enabled
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
25
04867-0-006
TEMPERATURE (C)
% ERROR
–40 –20 45 850 65
Figure 5. I
LED
Matching (%) over Temperature (°C), V
CC
= 3.6 V, I
LED
= 20 mA,
Six LEDs Enabled
–0.4
–0.2
–0.1
0
0.1
0.2
0.4
3.8
04867-0-007
SUPPLY VOLTAGE (V)
MATCHING ERROR (%)
2.6 4.2 5.03.4 4.6
–0.3
0.3
3.0 5.4
MAX NEGATIVE MATCHING ERROR
MAX POSITIVE MATCHING ERROR
Figure 6. I
LED
(mA) Matching Error (%) vs. Supply Voltage (V),
T
A
= 25°C and I
LED
= 20 mA
04867-0-008
TEMPERATURE (C)
LED CURRENT (mA)
–40 0 8040
20.08
20.12
20.14
20.16
20.18
20.20
20.24
20.10
20.22
Figure 7. I
LED
(mA) Variation over Temperature (°C), V
CC
= 3.6 V
5
10
15
20
25
30
35
3.8
04867-0-009
SUPPLY VOLTAGE (V)
LED CURRENT (mA)
2.6 3.0 4.6 5.43.4 5.04.2
Figure 8. I
LED
(mA) vs. Supply Voltage (V)