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ADS1281IPWRG4 Datasheet(PDF) 5 Page - Texas Instruments

No. de pieza ADS1281IPWRG4
Descripción Electrónicos  High-Resolution Analog-to-Digital Converter
Download  46 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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ADS1281IPWRG4 Datasheet(HTML) 5 Page - Texas Instruments

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DEVICE INFORMATION
CLK
SCLK
DRDY
DOUT
MOD/DIN
DGND
PHS/MCLK
DR1/M1
DR0/M0
HPF/SYNC
MFLAG
DGND
BYPAS
DGND
DVDD
PINMODE
RESET
PWDN
VREFP
VREFN
AVSS
AVDD
AINN
AINP
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
ADS1281
ADS1281
SBAS378A – SEPTEMBER 2007 – REVISED NOVEMBER 2007
TSSOP-24
Top View
TERMINAL FUNCTIONS
DESCRIPTION
NAME
NO.
FUNCTION
PIN MODE (PINMODE = 1)
REGISTER MODE (PINMODE = 0)
CLK
1
Digital input
Master clock input
Master clock input
SCLK
2
Digital input
SPI serial clock input
SPI serial clock input
DRDY
3
Digital output
Data ready output: read data on falling edge
Data ready output: read data on falling edge
DOUT
4
Digital output
SPI serial data output
SPI serial data output
MOD: 0 = Digital filter mode
MOD/DIN
5
Digital input
DIN: SPI serial data input
1 = Filter bypass (modulator output)
(MOD = 0) PHS:
If in modulator mode:
PHS/MCLK
7
Digital I/O
0 = Linear phase filter, 1 = Minimum phase filter
MCLK: Modulator clock output
(MOD = 1) MCLK: Modulator clock output
Otherwise, the pin is an unused input (must be tied).
If in modulator mode:
(MOD = 0) DR1 = Data rate select input 1
DR1/M1
8
Digital I/O
M1: Modulator data output 1
(MOD = 1) M1 = Modulator data output 1
Otherwise, the pin is an unused input (must be tied).
If in modulator mode:
(MOD = 0) DR0 = Data rate select input 0
DR0/M0
9
Digital I/O
M0: Modulator data output 0
(MOD = 1) M0 = Modulator data output 0
Otherwise, the pin is an unused input (must be tied).
(MOD = 0) HPF: 0 = High-pass filter off, 1 = HPF on
HPF/SYNC
10
Digital input
SYNC: Synchronize input
(MOD = 1) SYNC = Synchronize Input
Modulator over-range flag:
Modulator over-range flag:
MFLAG
11
Digital output
0 = Normal, 1 = Modulator over-range
0 = Normal, 1 = Modulator over-range
DGND
6, 12, 23
Digital ground
Digital ground, pin 12 is the key ground point
Digital ground, pin 12 is the key ground point
AINP
13
Analog input
Positive analog input
Positive analog input
AINN
14
Analog input
Negative analog input
Negative analog input
AVDD
15
Analog supply
Positive analog power supply
Positive analog power supply
AVSS
16
Analog supply
Negative analog power supply
Negative analog power supply
VREFN
17
Analog input
Negative reference input
Negative reference input
VREFP
18
Analog input
Positive reference input
Positive reference input
PWDN
19
Digital input
Power-down input, active low
Power-down input, active low
RESET
20
Digital input
Synchronize input
Reset input
PINMODE
21
Digital input
1 = Pin mode
0 = Register mode
DVDD
22
Digital supply
Digital power supply: +1.8V to +3.3V
Digital power supply: +1.8V to +3.3V
BYPAS
24
Capacitor bypass
Digital core bypass; 1
µF bypass capacitor to GND
Digital core bypass; 1
µF bypass capacitor to GND
Copyright © 2007, Texas Instruments Incorporated
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