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ADS1291IRSMT Datasheet(PDF) 4 Page - Texas Instruments

Part # ADS1291IRSMT
Description  ADS129x Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements
PDF  83 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADS1291IRSMT Datasheet(HTML) 4 Page - Texas Instruments

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PGA1N
PGA1P
IN1N
IN1P
IN2N
IN2P
PGA2N
PGA2P
DGND
DVDD
DRDY
DOUT
SCLK
DIN
CS
CLK
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
9
31
10
30
11
29
12
28
13
27
14
26
15
25
16
Thermal Pad,
Must Be Connected To AVSS
PGA1N
PGA1P
IN1N
IN1P
IN2N
IN2P
PGA2N
PGA2P
DGND
DVDD
DRDY
DOUT
SCLK
DIN
CS
CLK
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
4
ADS1291, ADS1292, ADS1292R
SBAS502C – DECEMBER 2011 – REVISED APRIL 2020
www.ti.com
Product Folder Links: ADS1291 ADS1292 ADS1292R
Submit Documentation Feedback
Copyright © 2011–2020, Texas Instruments Incorporated
5 Pin Configuration and Functions
PBS Package
32-Pin TQFP
Top View
RSM Package
32-Pin VQFN
Top View
(1)
Connect unused analog inputs to AVDD.
Pin Functions
PIN
FUNCTION
DESCRIPTION
NO.
PBS (TQFP)
RSM (VQFN)
1
PGA1N
PGA1N
Analog output
PGA1 inverting output
2
PGA1P
PGA1P
Analog output
PGA1 noninverting output
3
IN1N(1)
IN1N(1)
Analog input
Differential analog negative input 1
4
IN1P(1)
IN1P(1)
Analog input
Differential analog positive input 1
5
IN2N(1)
IN2N(1)
Analog input
Differential analog negative input 2
6
IN2P(1)
IN2P(1)
Analog input
Differential analog positive input 2
7
PGA2N
PGA2N
Analog output
PGA2 inverting output
8
PGA2P
PGA2P
Analog output
PGA2 noninverting output
9
VREFP
VREFP
Analog
input/output
Positive reference voltage
10
VREFN
VREFN
Analog input
Negative reference voltage; must be connected to AVSS
11
VCAP1
VCAP1
—
Analog bypass capacitor
12
AVDD
AVDD
Supply
Analog supply
13
AVSS
AVSS
Supply
Analog ground
14
CLKSEL
CLKSEL
Digital input
Master clock select
15
PWDN/RESET
PWDN/RESET
Digital input
Power-down or system reset; active low
16
START
START
Digital input
Start conversion
17
CLK
CLK
Digital input
Master clock input
18
CS
CS
Digital input
Chip select
19
DIN
DIN
Digital input
SPI data in



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