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TPS8804 Datasheet(PDF) 3 Page - Texas Instruments

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Part # TPS8804
Description  TPS8804 Smoke Alarm AFE
PDF  48 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS8804 Datasheet(HTML) 3 Page - Texas Instruments

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Thermal
Pad
VCC
REF0P3
COP
PREF
CON
AMUX
COO
DGND
MCU_TX1
LEDEN
CSEL
SCL
SDA
GPIO
SLC_RX
MCU_RX
VMCU
PLDO
VINT
20
38
36
37
35
33
34
32
30
31
29
27
28
26
24
25
23
21
22
VSL C
RESERVE D
RESERVE D
RESERVE D
LEDLDO
PDP
AGND
PDN
CSA
PDO
DINA
DINB
CSB
MCUSE L
SLC_TX2
SLC_TX1
MCU_TX2
RESERVE D
PGND
19
1
3
2
4
6
5
7
9
8
10
12
11
13
15
14
16
18
17
3
TPS8804
www.ti.com
SLVSF29 – OCTOBER 2019
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
5 Pin Configuration and Functions
DCP Package
38-Pin TSSOP
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
AGND
5
I
Analog ground. Connect to ground plane.
AMUX
33
O
Analog multiplexer output.
CON
35
I
Negative terminal of CO operational amplifier. Connect to GND if unused.
COO
34
O
Output of CO operational amplifier. Connect to GND if unused.
COP
36
I
Positive terminal of CO operational amplifier. Connect to GND if unused.
CSA
9
I
Photo LED current sense.
CSB
11
I
Photo LED current sense. Connect to GND if unused.
CSEL
29
I
Device address select pin for I2C serial interface. Pull to GND for I2C address 0x3F. Pull to
VMCU for I2C address 0x2A. Do not leave floating.
DGND
32
I
Digital ground. Connect to AGND.
DINA
10
I
Photo LED current sink. Connect to cathode of LED.
DINB
12
I
Photo LED current sink. Connect to cathode of LED. Connect to GND if unused.
GPIO
26
I/O
Multi-purpose digital input and output.
LEDEN
31
I
Photo LED enable. Do not leave floating while device is powered.
LEDLDO
4
O
LDO output for charging LED supply capacitor. Connect to GND if unused.
MCU_RX
25
O
SLC interface output for receiving data from VLINE.
MCU_TX1
30
I
Primary SLC interface input for transmitting data to VLINE.
MCU_TX2
16
I
Secondary SLC interface input for transmitting data to VLINE.
MCUSEL
13
I
Default MCULDO voltage selection input. Leave floating for VMCU = 3.3V. Tie to VINT for
VMCU = 2.5V. Tie to GND for VMCU = 1.8V. Connect to GND with 620-Ω resistor for VMCU
= 1.5V.
PDN
7
I
Photo input amplifier negative input. Connect to cathode of photodiode.
PDO
8
O
Photo input amplifier output pin.
PDP
6
I
Photo input amplifier positive Input. Connect to anode of photodiode.
PGND
17
I
Power ground. Connect to AGND.



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