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ADS1257 Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części ADS1257
Szczegółowy opis  4-Channel, 24-Bit ADC
Download  16 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1257 Arkusz danych(HTML) 4 Page - Texas Instruments

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background image
15
14
12
Thermal Pad
1
2
3
4
5
13
11
REFP
SCLK
DIN
DOUT
DRDY
CS
AIN0
AIN1
AIN2
AIN3
6
7
8
9
10
16
17
18
19
20
ADS1257
SBAS656A – SEPTEMBER 2015 – REVISED OCTOBER 2015
www.ti.com
6 Pin Configuration and Functions
RGW Package
20-Pin QFN
Top View (Not to Scale)
Pin Functions
PIN
I/O
DESCRIPTION
NO.
NAME
1
REFP
Analog input
Positive reference input
2
AIN0
Analog input
Analog input 0. Leave unconnected or connect to AVDD if not used.
3
AIN1
Analog input
Analog input 1. Leave unconnected or connect to AVDD if not used.
4
AIN2
Analog input
Analog input 2. Leave unconnected or connect to AVDD if not used.
5
AIN3
Analog input
Analog input 3. Leave unconnected or connect to AVDD if not used.
6
SYNC/PDWN
Digital input(1)(2)
Synchronization or power down input; active low. Connect to DVDD if not used.
7
RESET
Digital input(1)(2)
Reset input, active low. Connect to DVDD if not used.
8
DVDD
Digital
Digital power supply
9
DGND
Digital
Digital ground
10
CLKIN
Digital input(2)
External clock input
11
CS
Digital input(1)(2)
Chip select; active low. Connect to DGND if not used.
12
DRDY
Digital output
Data ready output; active low
13
DOUT
Digital output
Serial data output
14
DIN
Digital input(1)(2)
Serial data input
15
SCLK
Digital input(1)(2)
Serial clock input
16
D0/CLKOUT
Digital input/output(3)
General purpose digital I/O 0 or clock output
17
D1
Digital input/output(3)
General purpose digital I/O 1
18
AVDD
Analog
Analog power supply
19
AGND
Analog
Analog ground
20
REFN
Analog input
Negative reference input
Thermal Pad
Thermal power pad. Connect to AGND.
(1)
Schmitt-trigger digital input.
(2)
5-V tolerant digital input.
(3)
Schmitt-trigger digital input when the digital I/O is configured as an input.
4
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