Datasheet

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SBAS314B − APRIL 2004 − REVISED JANUARY 2009
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5
PIN ASSIGNMENTS
PW PACKAGE
TSSOP-14
(TOP VIEW)
VDD
SCLK
CLK
DRDY/DOUT
MUX
TEMPEN
BUFEN
VREFP
VREFN
GND
AINN1
AINP1
AINN2
AINP2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
ADS1222
Terminal Functions
TERMINAL
NAME NO. I/O DESCRIPTION
VDD 1 Analog/Digital Analog and digital power supply
SCLK 2 Digital input Serial clock input
CLK 3 Digital input System clock input
DRDY/DOUT 4 Digital Output Dual-purpose output:
Data ready: indicates valid data by going low.
Data output: outputs data, MSB first, on the rising edge of SCLK.
MUX 5 Digital input Selects analog input of mux
TEMPEN 6 Digital input Selects temperature sensor input from mux
BUFEN 7 Digital input Enables input buffer
AINP2 8 Analog input Analog channel 2 positive input
AINN2 9 Analog input Analog channel 2 negative input
AINP1 10 Analog input Analog channel 1 positive input
AINN1 11 Analog input Analog channel 1 negative input
GND 12 Analog/Digital Analog and digital ground
VREFN 13 Analog input Negative reference input
VREFP 14 Analog input Positive reference input