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ADS1146IPWR bảng dữ liệu(PDF) 11 Page - Texas Instruments

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ADS1146
ADS1147
ADS1148
www.ti.com
SBAS453F – JULY 2009 – REVISED APRIL 2012
ADS1148 (TSSOP-28) PIN DESCRIPTIONS
NAME
PIN NO.
FUNCTION
DESCRIPTION
DVDD
1
Digital
Digital power supply
DGND
2
Digital
Digital ground
CLK
3
Digital input
External clock input. Tie this pin to DGND to activate the internal oscillator.
RESET
4
Digital input
Chip reset (active low). Returns all register values to reset values.
REFP0/GPIO0
5
Analog input
Positive external reference input 0, or general-purpose digital input/output pin 0
REFN0/GPIO1
6
Analog input
Negative external reference 0 input, or general-purpose digital input/output pin 1
REFP1
7
Analog input
Positive external reference 1 input
REFN1
8
Analog input
Negative external reference 1 input
VREFOUT
9
Analog output
Positive internal reference voltage output
Negative internal reference voltage output. Connect this pin to AVSS when using a unipolar
VREFCOM
10
Analog output
supply, or to the midvoltage of the power supply when using a bipolar supply.
AIN0/IEXC
11
Analog input
Analog input 0, optional excitation current output
AIN1/IEXC
12
Analog input
Analog input 1, optional excitation current output
Analog input
AIN4/IEXC/GPIO4
13
Analog input 4, optional excitation current output, or general-purpose digital input/output pin 4
Digital in/out
Analog input
AIN5/IEXC/GPIO5
14
Analog input 5, optional excitation current output, or general-purpose digital input/output pin 5
Digital in/out
Analog input
AIN6/IEXC/GPIO6
15
Analog input 6, optional excitation current output, or general-purpose digital input/output pin 6
Digital in/out
Analog input
AIN7/IEXC/GPIO7
16
Analog input 7, optional excitation current output, or general-purpose digital input/output pin 7
Digital in/out
Analog input
AIN2/IEXC/GPIO2
17
Analog input 2, optional excitation current output, or general-purpose digital input/output pin 2
Digital in/out
Analog input
AIN3/IEXC/GPIO3
18
Analog input 3, optional excitation current output, or general-purpose digital input/output pin 3
Digital in/out
IEXC2
19
Analog output
Excitation current output 2
IEXC1
20
Analog output
Excitation current output 1
AVSS
21
Analog
Negative analog power supply
AVDD
22
Analog
Positive analog power supply
START
23
Digital input
Conversion start. See text for complete description.
CS
24
Digital input
Chip select (active low)
DRDY
25
Digital output
Data ready (active low)
Serial data out output, or data out combined with data ready (active low when DRDY function
DOUT/DRDY
26
Digital output
enabled)
DIN
27
Digital input
Serial data input
SCLK
28
Digital input
Serial clock input
Copyright © 2009–2012, Texas Instruments Incorporated
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Product Folder Link(s): ADS1146 ADS1147 ADS1148


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