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ADS1146 bảng dữ liệu(PDF) 7 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-Bit Analog-to-Digital Converters for Temperature Sensors
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ADS1146 bảng dữ liệu(HTML) 7 Page - Texas Instruments

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ADS1146
ADS1147
ADS1148
www.ti.com
SBAS453C – JULY 2009 – REVISED APRIL 2010
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.
Analog input
Positive external reference input 0, or
REFP0/GPIO0
5
Digital in/out
general-purpose digital input/output pin 0
Analog input
Negative external reference 0 input, or
REFN0/GPIO1
6
Digital in/out
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
Analog input 4, optional excitation current output, or
AIN4/IEXC/GPIO4
13
Digital in/out
general-purpose digital input/output pin 4
Analog input
Analog input 5, optional excitation current output, or
AIN5/IEXC/GPIO5
14
Digital in/out
general-purpose digital input/output pin 5
Analog input
Analog input 6, optional excitation current output, or
AIN6/IEXC/GPIO6
15
Digital in/out
general-purpose digital input/output pin 6
Analog input
Analog input 7, optional excitation current output, or
AIN7/IEXC/GPIO7
16
Digital in/out
general-purpose digital input/output pin 7
Analog input
Analog input 2, optional excitation current output, or
AIN2/IEXC/GPIO2
17
Digital in/out
general-purpose digital input/output pin 2
Analog input
Analog input 3, optional excitation current output, or
AIN3/IEXC/GPIO3
18
Digital in/out
general-purpose digital input/output pin 3
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
DOUT/DRDY
26
Digital output
data out combined with data ready (active low when DRDY function enabled)
DIN
27
Digital input
Serial data input
SCLK
28
Digital input
Serial clock input
Copyright © 2009–2010, Texas Instruments Incorporated
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