Datasheet

0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0 10 20 30 40 50 60 70
Supply Current, uA
Temperature, C
RX_ANA_SUP (STG2DIS)
RX_ANA_SUP (STG2EN)
RX_DIG_SUP
TX_CTRL_SUP
LED_DRV_SUP
C049
0
20
40
60
80
100
±40 ±30 ±20 ±10
0 10 20 30 40 50 60 70 80
Input referred noise current, pA rms
Temperature, C
STG2=DIS, 5Hz BW (Note 1)
STG2=EN, 5Hz BW (Note 2)
STG2=DIS, 20Hz BW (Note 1)
STG2=EN, 20Hz BW (Note 2)
C050
PRF = 1200 Hz, Duty cycle = 10%
1) RF = 100K, Stage 2 & ambient cancellation disabled
2) RF = 500K, Stage 2 & ambient cancellation enabled with stage 2 gain = 4
100
200
300
400
500
600
700
800
100 300 500 700 900 1100
RX Supply Current, uA
PRF, Hz
RX_ANA_SUP = 2V (STG2=DIS)
RX_ANA_SUP = 2V (STG2=EN)
RX_DIG_SUP=2V
RX_ANA_SUP = 3.3V (STG2=DIS)
RX_ANA_SUP = 3.3V (STG2=EN)
RX_DIG_SUP=3.3V
C047
0.00
20.00
40.00
60.00
80.00
100.00
0.50 0.75 1.00
TX Supply Current, uA
TX_VREF, V
TX_CTRL_SUP
LED_DRV_SUP
C048
TX_CTRL_SUP = LED_DRV_SUP = 3V TO 3.6V
0
200
400
600
800
1000
1200
63.0 63.5 64.0 64.5 65.0 65.5 66.0 66.5 67.0 67.5 68.0 68.5 69.0 69.5 70.0 70.5 71.0 71.5 72.0 72.5 73.0 73.5 74.0 74.5 75.0 75.5 76.0 76.5 77.0
Number of Occurences
LED Current (mA)
C045
TX_RANGE = 150mA,
Data from 7737 devices
0
200
400
600
800
1000
1200
135 137 139 141 143 145 147 149 151 153 155 157 159 161 163 165
Number of Occurences
LED Current (mA)
C046
TX_RANGE = 150mA,
Data from 7737 devices
AFE4490
SBAS602F –DECEMBER 2012–REVISED OCTOBER 2013 www.ti.com
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 45. LED CURRENT WITH Tx DAC SETTING = 120 Figure 46. LED CURRENT WITH Tx DAC SETTING = 255
(150 mA)
(70 mA)
Figure 47. RECEIVER SUPPLIES vs PRF Figure 48. TRANSMITTER SUPPLIES vs TX_REF
Figure 49. POWER SUPPLIES vs TEMPERATURE Figure 50. INPUT-REFERRED NOISE vs TEMPERATURE
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