Datasheet
0
200
400
600
800
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
10.2
10.4
10.6
10.8
11.0
11.2
11.4
11.6
11.8
12.0
Number of Occurences
LED Current (mA)
C043
TX_RANGE = 150mA,
Data from 2326 devices
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
30.0
30.5
31.0
31.5
32.0
32.5
33.0
33.5
34.0
34.5
35.0
35.5
36.0
36.5
37.0
37.5
38.0
38.5
39.0
39.5
40.0
Number of Occurences
LED Current (mA)
C044
TX_RANGE = 150mA,
Data from 7737 devices
0
20
40
60
80
100
120
140
160
0 50 100 150 200 250
TX Current (mA)
TX LED DAC Setting
Expected + 1%
Actual DAC Current
Expected - 1%
C039
TX Reference Voltage = 0.75V
0
20
40
60
80
100
120
140
160
180
200
0 50 100 150 200 250
TX Current (mA)
TX LED DAC Setting
Expected + 1%
Actual DAC Current
Expected - 1%
C040
TX Reference Voltage = 1.0V
0
20
40
60
80
100
0 50 100 150 200 250
TX Current (mA)
TX LED DAC Setting
Expected + 1%
Actual DAC Current
Expected - 1%
C037
TX Reference Voltage = 0.5V
0
20
40
60
80
100
0 50 100 150 200 250
TX Current (mA)
TX LED DAC Setting
Expected + 1%
Actual DAC Current
Expected - 1%
C038
TX Reference Voltage = 0.5V
AFE4490
www.ti.com
SBAS602F –DECEMBER 2012–REVISED OCTOBER 2013
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, RX_ANA_SUP = RX_DIG_SUP = 3.0 V, TX_CTRL_SUP = LED_DRV_SUP = 5 V, and f
CLK
= 8 MHz, unless
otherwise noted.
Figure 39. TRANSMITTER CURRENT LINEARITY Figure 40. TRANSMITTER CURRENT LINEARITY
(75-mA Range) (100-mA Range)
Figure 41. TRANSMITTER CURRENT LINEARITY Figure 42. TRANSMITTER CURRENT LINEARITY
(150-mA Range) (200-mA Range)
Figure 43. LED CURRENT WITH Tx DAC SETTING = 17 Figure 44. LED CURRENT WITH Tx DAC SETTING = 60
(10 mA) (35 mA)
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