Datasheet
ADS8327
ADS8328
www.ti.com
SLAS415E – APRIL 2006– REVISED JANUARY 2011
ADS8327 Terminal Functions
NO.
NAME I/O DESCRIPTION
TSSOP QFN
AGND 5 15 – Analog ground
BDGND 14 8 – Interface ground
CONVST 9 3 I Freezes sample and hold, starts conversion with next rising edge of internal clock
Status output. If programmed as EOC, this pin is low (default) when a conversion is in
progress. If programmed as an interrupt (INT), this pin is low for a preprogrammed
EOC/ INT/ CDI 10 4 O duration after the end of conversion and valid data are to be output. The polarity of EOC
or INT is programmable. This pin can also be used as a chain data input when the device
is operated in chain mode.
I Frame sync signal for TMS320 DSP serial interface or chip select input for SPI interface
FS/CS 11 5
slave select (SS–).
+IN 3 13 I Noninverting input
–IN 4 14 I Inverting input, usually connected to ground
NC 8 2 No connection
REF+ 7 1 I External reference input.
REF– 6 16 I Connect to AGND through individual via.
RESERVED 2 12 – Reserved, connect to AGND or +VA
SCLK 15 9 I Clock for serial interface
SDI 12 6 I Serial data in
SDO 13 7 O Serial data out
+VA 1 11 Analog supply, +2.7 V to +5.5 VDC.
+VBD 16 10 Interface supply
ADS8328 Terminal Functions
NO.
NAME I/O DESCRIPTION
TSSOP QFN
AGND 5 15 – Analog ground
BDGND 14 8 – Interface ground
COM 4 14 I Common inverting input, usually connected to ground
CONVST 9 3 I Freezes sample and hold, starts conversion with next rising edge of internal clock
Status output. If programmed as EOC, this pin is low (default) when a conversion is in
progress. If programmed as an interrupt (INT), this pin is low for a preprogrammed
EOC/ INT/
10 4 O duration after the end of conversion and valid data are to be output. The polarity of EOC
CDI
or INT is programmable. This pin can also be used as a chain data input when the device
is operated in chain mode.
FS/CS 11 5 I Frame sync signal for TMS320 DSP serial interface or chip select input for SPI interface
+IN1 2 12 I Second noninverting input.
+IN0 3 13 I First noninverting input
NC 8 2 – No connection.
REF+ 7 1 I External reference input.
REF– 6 16 I Connect to AGND through individual via.
SCLK 15 9 I Clock for serial interface
SDI 12 6 I Serial data in (conversion start and reset possible)
SDO 13 7 O Serial data out
+VA 1 11 Analog supply, +2.7 V to +5.5 VDC.
+VBD 16 10 Interface supply
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