Datasheet

16
22654314fb
LTC2265-14/
LTC2264-14/LTC2263-14
PAR/SER (Pin 35): Programming Mode Selection Pin.
Connect to ground to enable the serial programming
mode. CS, SCK, SDI and SDO become a serial interface
that controls the A/D operating modes. Connect to V
DD
to enable parallel programming mode where CS, SCK,
SDI and SDO become parallel logic inputs that control a
reduced set of the A/D operating modes. PAR/SER should
be connected directly to ground or the V
DD
of the part and
not be driven by a logic signal.
V
REF
(Pin 36): Reference Voltage Output. Bypass to ground
with a 1µF ceramic capacitor, nominally 1.25V.
SENSE (Pin 38): Reference Programming Pin. Connect-
ing SENSE to V
DD
selects the internal reference and a
±1V input range. Connecting SENSE to ground selects
the internal reference and a ±0.5V input range. An external
reference between 0.625V and 1.3V applied to SENSE
selects an input range of ±0.8 • V
SENSE
.
LVDS OUTPUTS
The following pins are differential LVDS outputs. The
output current level is programmable. There is an op-
tional internal 100Ω termination resistor between the
pins of each LVDS output pair.
OUT2B
–
/OUT2B
+
, OUT2A
–
,OUT2A
+
(Pins 19/20, 21/22):
Serial Data Outputs for Channel 2. In 1-lane output mode,
only OUT2A
–
/OUT2A
+
are used.
FR
–
/FR
+
(Pin 23/Pin 24): Frame Start Output.
DCO
–
/DCO
+
(Pin 27/Pin 28): Data Clock Output.
OUT1B
–
/OUT1B
+
, OUT1A
–
/OUT1A
+
(Pins 29/30, 31/32):
Serial Data Outputs for Channel 1. In 1-lane output mode,
only OUT1A
–
/OUT1A
+
are used.
PIN FUNCTIONS