Datasheet

PIN CONFIGURATION
START
SCLK
DRDY/DOUT
BUFEN
GND
AINN1
AINP1
NC
DVDD AVDD VREFP VREFN
1
2
3
4
12
11
10
9
ADS1225
16 15 14 13
GND
TEMPEN
MODE
NC
5 6 7 8
ADS1225
ADS1226
www.ti.com ....................................................................................................................................................... SBAS346C – MAY 2006 – REVISED JANUARY 2009
RGV PACKAGE
QFN-16, 4.0mm × 4.0mm
(TOP VIEW)
PIN DESCRIPTIONS — ADS1225
TERMINAL
ANALOG/DIGITAL
NAME NO. INPUT/OUTPUT DESCRIPTION
START 1 Digital Input High: Start conversions; Low: Shutdown
SCLK 2 Digital Input Serial clock input
Dual-purpose output:
DRDY/DOUT 3 Digital Output Data ready: indicates valid data by going low.
Data output: outputs data, MSB first, on the rising edge of SCLK.
BUFEN 4 Digital Input Enables buffer after MUX
GND 5 Ground Analog and digital ground
TEMPEN 6 Digital Input Selects temperature sensor input from MUX
MODE 7 Digital Input Selects between High-Speed and High-Resolution modes
NC 8 No connect
NC 9 No connect
AINP1 10 Analog Input Analog channel 1 positive input
AINN1 11 Analog Input Analog channel 1 negative input
GND 12 Ground Analog and digital ground
VREFN 13 Analog Input Negative reference input
VREFP 14 Analog Input Positive reference input
AVDD 15 Analog Analog power supply
DVDD 16 Digital Digital power supply
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Product Folder Link(s): ADS1225 ADS1226