SX8722 데이터 시트보기 (PDF) - Semtech Corporation
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SX8722 Datasheet PDF : 108 Pages
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SX8722
High gain acquisition for sensor interface
ADVANCED COMMUNICATIONS & SENSING
3. Pin Description
DATASHEET
Pin
Symbol
1 NC
2 SLEEP
Type
Digital input
3 SHUT
Digital input
4 READY
5 NC
6 NC
7 NC
8 BIAS
Digital output
Digital output
9 EE_POW
10 EE_SDA
Digital output
Digital IO
11 EE_SCL
Digital IO
12 ALRM1
Digital output
13 ALRM2
Digital output
14 CKOUT
15 NC
16 SCL
17 SDA
18 NC
19 NC
20 NTEST
21 AR2P
22 AR2N
23 AC7
Digital output
Digital IO
Digital IO
Digital input
Analog input
Analog input
Analog input
Function
Status at POR
Not connected
Setting this pin to 0 puts the SX8722 in sleep mode, power Internal pull-up
consumption ~1.5uA, otherwise the pin can be floating
Setting this pin to 0 puts the SX8722 in shutdown mode,
Internal pull-up
power consumption ~0.5uA, otherwise the pin can be floating
Is high when a measurement data is available
Low
Not connected
Not connected
Not connected
Bias pin, is set to VBAT voltage when a measurement is
Low
performed
Must be used to power the optional I2C EEPROM
Low
Must be connected to SDA pin of the optional EEPROM
Low
when used. Otherwise must remain floating (see chapter
EEPROM connection)
Must be connected to SCL pin of the optional EEPROM
Low
when used. Otherwise must remain floating (see chapter
EEPROM connection)
Alarm1 pin, is high when "on" threshold is reached and low Low
when "off" threshold is reached, when not used can reamin
floating
Alarm2 pin, is high when "on" threshold is reached and low Low
when "off" threshold is reached, when not used can reamin
floating
System clock output
Low
Not connected
Serial clock line of the I2C compatible interface
Input
Serial data line of the I2C compatible interface
Input
Not connected
Not connected
Must be connected to VBAT
Second analog input reference (positive input)
Second analog input reference (negative input)
ZoomingADCTM input 7
ACS - Revision 4.2
©2008 Semtech Corp.
October 2008
Page 11
www.semtech.com
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