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AFE4490 Datasheet(PDF) 35 Page - Texas Instruments |
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AFE4490 Datasheet(HTML) 35 Page - Texas Instruments |
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35 / 70 page  50uA 0 mA to 200 mA (See the LEDRANGE bits in the LEDCNTRL register.) LED_ON 1 PA TX_CTRL_SUP_5V LED_DRV_SUP_5V Device Tx LED Bridge LED Current Control DAC Tx Reference and Control AFE4490 www.ti.com SBAS602B – DECEMBER 2012 – REVISED FEBRUARY 2013 Transmitter Power Path The block diagram in Figure 46 shows the AFE4490 Tx subsystem power routing. Figure 46. Transmit Subsystem Power Routing LED Power Reduction During Periods of Inactivity The diagram in Figure 47 shows how LED bias current passes 50 µA whenever LED_ON occurs. In order to minimize power consumption in periods of inactivity, the LED_ON control must be turned off. Figure 47. LED Bias Current Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 35 Product Folder Links: AFE4490 |
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