Datasheet

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SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007
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5
PIN ASSIGNMENTS
PW PACKAGE
TSSOP-16
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VREFP
VREFN
DGND
DVDD
CLK
SCLK
DRDY/FSYNC
DOUT
AINP
AINN
AGND
AVDD
MODE
FORMAT
SYNC/PDWN
DIN
ADS1271
Terminal Functions
PIN
NAME NO. FUNCTION DESCRIPTION
AINP 1 Analog Input Positive analog input
AINN 2 Analog Input Negative analog input
AGND 3 Analog Input Analog ground
AVDD 4 Analog Input Analog supply
MODE 5 Digital Input MODE = 0: High-Speed mode
MODE
5
Digital Input
MODE = float: High-Resolution mode
MODE = 1: Low-Power mode
FORMAT 6 Digital Input FORMAT = 0: SPI
FORMAT
6
Digital Input
FORMAT = float: Modulator output (ADS1271B only)
FORMAT = 1: Frame-Sync
SYNC/PDWN 7 Digital Input Synchronize/Power-down input, active low
DIN 8 Digital Input Data input for daisy-chain operation
DOUT 9 Digital Output ADC data output, modulator output (modulator mode)
DRDY/FSYNC 10 Digital
Input/Output
If FORMAT = 0 (SPI), then pin 10 = DRDY output
If FORMAT = 1 (Frame-Sync), then pin 10 = FSYNC input
SCLK 11 Digital Input Serial clock for ADC data retrieval, modulator clock output (modulator mode)
CLK 12 Digital Input Master clock
DVDD 13 Digital Input Digital supply
DGND 14 Digital Input Digital ground
VREFN 15 Analog Input Negative reference input
VREFP 16 Analog Input Positive reference input