LTC1197 Linear Technology, LTC1197 Datasheet - Page 10

• Manufacturer Part Number: LTC1197
• Description: 10-Bit/ 500ksps ADCs in MSOP with Auto Shutdown
• Manufacturer: Linear Technology

PI FU CTIO S
BLOCK
LTC1197/LTC1197L
LTC1199/LTC1199L
CS (Pin 1): Chip Select Input. A logic low on this input
enables the LTC1197/LTC1197L/LTC1199/LTC1199L.
Power shutdown is activated when CS is brought high.
+ IN, CH0 (Pin 2): Analog Input. This input must be free of
noise with respect to GND.
– IN, CH1 (Pin 3): Analog Input. This input must be free of
noise with respect to GND.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
V
reference input defines the span of the A/D converter and
must be kept free of noise with respect to GND.
10
REF
U
(Pin 5): LTC1197/LTC1197L Reference Input. The
U
I D AGRA
U
+ IN (CH0)
– IN (CH1)
W
C
SMPL
GND
SHUTDOWN CIRCUIT
V
CC
–
+
BIAS AND
CAPACITIVE DAC
MICROPOWER
COMPARATOR
D
A/D configuration word is shifted into this input.
D
result is shifted out of this output.
CLK (Pin 7): Shift Clock. This clock synchronizes the serial
data transfer.
V
free of noise and ripple by bypassing directly to the
analog ground plane. For LTC1199/LTC1199L, V
tied internally to this pin.
CC
IN
OUT
(Pin 5): LTC1199/LTC1199L Digital Data Input. The
(Pin 8): Positive Supply. This supply must be kept
V
(Pin 6): Digital Data Output. The A/D conversion
REF
CS
SERIAL PORT
(D
SAR
PIN NAMES IN PARENTHESES
REFER TO THE LTC1199/LTC1199L
IN
)
CLK
D
OUT
REF
is