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AFE4490RHAR 데이터시트(PDF) 9 Page - Texas Instruments

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부품명 AFE4490RHAR
상세설명  Integrated Analog Front-End for Pulse Oximeters
PDF  70 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

AFE4490RHAR 데이터시트(HTML) 9 Page - Texas Instruments

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INN
INP
RX_ANA_GND
VCM
DNC
(1)
DNC
BG
VSS
TX_REF
DNC
CLKOUT
RESET
ADC_RDY
SPISTE
SPISIMO
SPISOMI
SCLK
PD_ALM/ADC Reset
LED_ALM
DIAD_END
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
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12
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AFE4490
www.ti.com
SBAS602B – DECEMBER 2012 – REVISED FEBRUARY 2013
PIN CONFIGURATION
RHA PACKAGE
QFN-40
(Top View)
(4) DNC = Do not connect.
PIN DESCRIPTIONS
NAME
NO.
FUNCTION
DESCRIPTION
Output signal that indicates ADC conversion completion.
ADC_RDY
28
Digital
Can be connected to the interrupt input pin of an external microcontroller.
AFE-only power-down input; active low.
AFE_PDN
20
Digital
Can be connected to the port pin of an external microcontroller.
Decoupling capacitor for internal band-gap voltage to ground.
BG
7
Reference
(2.2-µF decoupling capacitor to ground, expected voltage = 1.0 V.)
Buffered 4-MHz output clock output.
CLKOUT
30
Digital
Can be connected to the clock input pin of an external microcontroller.
Output signal that indicates completion of diagnostics.
DIAG_END
21
Digital
Can be connected to the port pin of an external microcontroller.
DNC(1)
5, 6, 10
—
Do not connect these pins. Leave as open-circuit.
INN
1
Analog
Receiver input pin. Connect to photodiode anode.
INP
2
Analog
Receiver input pin. Connect to photodiode cathode.
LED_DRV_GND
12, 13, 16
Supply
LED driver ground pin, H-bridge. Connect to common board ground.
LED driver supply pin, H-bridge. Connect to an external power supply capable of supplying the
LED_DRV_SUP
17, 18
Supply
large LED current, which is drawn by this supply pin.
Output signal that indicates an LED cable fault.
LED_ALM
22
Digital
Can be connected to the port pin of an external microcontroller.
(1)
Leave pins as open circuit. Do not connect.
Copyright © 2012–2013, Texas Instruments Incorporated
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Product Folder Links: AFE4490



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