Datasheet

LTC2392-16
9
239216fa
D15 (Pin 28): Data Bit 15. When SER/PAR = 0 this pin is
Bit 15 of the parallel port data output bus. The data format
is determined by the logic level of OB/2C.
BUSY (Pin 29): Busy Output. A low-to-high transition oc-
curs when a conversion is started. It stays high until the
conversion is complete. The falling edge of BUSY can be
used as the data-ready clock signal.
RD (Pin 30): Read Data Input. When CS and RD are both
low, the parallel and serial output bus is enabled.
CS (Pin 31): Chip Select. When CS and RD are both low,
the parallel and serial output bus is enabled. CS is also
used to gate the external shift clock.
RESET (Pin 32): Reset Input. When high the LTC2392-16
is reset, and if this occurs during a conversion, the con-
version is halted and the data bus is put into Hi-Z mode.
PD (Pin 33): Power-Down Input. When high, the
LTC2392-16 is powered down and subsequent conversion
requests are ignored. Before entering power shutdown,
the digital output data should be read.
CNVST (Pin 34): Conversion Start Input. A falling edge
on CNVST puts the internal sample-and-hold into the hold
mode
and starts a conversion. CNVST is independent of CS.
VCM (Pin 36): Common Mode Analog Output. Typically
the output voltage is 2.048V. Bypass to GND with a 10µF
capacitor.
REFOUT (Pin 37): Internal Reference Output. Nominal
output voltage is 4.096V. Connect this pin to REFIN if
using the internal reference. If an external reference is
used connect REFOUT to ground.
REFIN (Pin 38): Reference Input. An external reference
can be applied to REFIN if a more accurate reference is
required. If an external reference is used tie REFOUT to
ground.
REFSENSE (Pin 39): Reference Input Sense. Leave
REFSENSE open when using the internal reference. If
an external reference is used connect REFSENSE to the
ground pin of the external reference.
IN
–
, IN
+
(Pin 42, Pin 43): Differential Analog Inputs.
IN
+
– (IN
–
) can range up to ±V
REF
.
pin Functions