Datasheet

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SBAS286C − JUNE 2003 − REVISED JANUARY 2009
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5
PIN ASSIGNMENTS
PW PACKAGE
TSSOP
(TOP VIEW)
DVDD
SCLK
CLK
DRDY/DOUT
MUX0
MUX1
TEMPEN
BUFEN
AINP4
AINN4
AVDD
VREFP
VREFN
GND
AINN1
AINP1
AINN2
AINP2
AINN3
AINP3
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
ADS1224
Terminal Functions
TERMINAL
NAME NO. I/O DESCRIPTION
DVDD 1 Digital Digital power supply
SCLK 2 Digital input Serial clock input
CLK 3 Digital input System clock input
DRDY/DOUT 4 Digital Ouput Dual-purpose output:
Data Ready: indicates valid data by going low.
Data Output: outputs data, MSB first, on the rising edge of SCLK.
MUX0 5 Digital input Selects analog input of mux, bit 0
MUX1 6 Digital input Selects analog input of mux, bit 1
TEMPEN 7 Digital input Selects temperature sensor input from mux
BUFEN 8 Digital input Enables input buffer
AINP4 9 Analog input Analog channel 4 positive input
AINN4 10 Analog input Analog channel 4 negative input
AINP3 11 Analog input Analog channel 3 positive input
AINN3 12 Analog input Analog channel 3 negative input
AINP2 13 Analog input Analog channel 2 positive input
AINN2 14 Analog input Analog channel 2 negative input
AINP1 15 Analog input Analog channel 1 positive input
AINN1 16 Analog input Analog channel 1 negative input
GND 17 Analog/Digital Analog and digital ground
VREFN 18 Analog input Negative reference input
VREFP 19 Analog input Positive reference input
AVDD 20 Analog Analog power supply