Datasheet

LTC1863L/LTC1867L
7
1863l7lfc
PIN FUNCTIONS
TYPICAL PERFORMANCE CHARACTERISTICS
(LTC1863L/ LTC1867L)
CODE
0
INL (LSB)
0
0.50
4096
1863L7L G16
–0.50
–1.00
1024
2048
3072
512
1536
2560
3584
1.00
–0.25
0.25
–0.75
0.75
CODE
0
DNL (LSB)
0
0.50
4096
1863L7L G17
–0.50
–1.00
1024
2048
3072
512
1536
2560
3584
1.00
–0.25
0.25
–0.75
0.75
Differential Nonlinearity
vs Output Code (LTC1863L)
Integral Nonlinearity
vs Output Code (LTC1863L)
CHO-CH7/COM (Pins 1-8): Analog Input Pins. Analog
i n p u t s m u s t b e f r e e o f n o i s e w i t h r e s p e c t t o G N D . C H 7/ C O M
can be either a separate channel or the common minus
input for the other channels. Unused channels should be
tied to ground.
REFCOMP (Pin 9): Reference Buffer Output Pin. Bypass
to GND with 10μF tantalum capacitor in parallel with 0.1μF
ceramic capacitor (2.5V Nominal). To overdrive REFCOMP,
tie V
REF
to GND.
V
REF
(Pin 10): 1.25V Reference Output. This pin can also
be used as an external reference buffer input for improved
accuracy and drift. Bypass to GND with 2.2μF tantalum
capacitor in parallel with 0.1μF ceramic capacitor.
CS/CONV (Pin 11): This input provides the dual function
of initiating conversions on the ADC and also frames the
serial data transfer.
SCK (Pin 12): Shift Clock. This clock synchronizes the
serial data transfer.
SDO (Pin 13): Digital Data Output. The A/D conversion
result is shifted out of this output. Straight binary format
for unipolar mode and two’s complement format for
bipolar mode.
SDI (Pin 14): Digital Data Input Pin. The A/D confi guration
word is shifted into this input.
GND (Pin 15): Analog and Digital GND.
V
DD
(Pin 16): Analog and Digital Power Supply. Bypass to
GND with 10μF tantalum capacitor in parallel with 0.1μF
ceramic capacitor.