LTC1865_15 Datasheet, PDF (10/24 Pages) Linear Technology – Power, 16-Bit, 250ksps 1- and 2-Channel ADCs in MSOP

LTC1864/LTC1865
PIN FUNCTIONS
LTC1864
V_REF (Pin 1): Reference Input. The reference input defines
the span of the A/D converter and must be kept free of
noise with respect to GND.
IN⁺, IN^– (Pins 2, 3): Analog Inputs. These inputs must
be free of noise with respect to GND.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
CONV (Pin 5): Convert Input. A logic high on this input
starts the A/D conversion process. If the CONV input is
left high after the A/D conversion is finished, the part
powers down. A logic low on this input enables the SDO
pin, allowing the data to be shifted out.
SDO (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this pin.
SCK (Pin 7): Shift Clock Input. This clock synchronizes
the serial data transfer.
V_CC (Pin 8): Positive Supply. This supply must be kept
free of noise and ripple by bypassing directly to the
analog ground plane.
LTC1865 (MSOP Package)
CONV (Pin 1): Convert Input. A logic high on this input
starts the A/D conversion process. If the CONV input is
left high after the A/D conversion is finished, the part
powers down. A logic low on this input enables the SDO
pin, allowing the data to be shifted out.
CH0, CH1 (Pins 2, 3): Analog Inputs. These inputs must
be free of noise with respect to AGND.
AGND (Pin 4): Analog Ground. AGND should be tied directly
to an analog ground plane.
DGND (Pin 5): Digital Ground. DGND should be tied directly
to an analog ground plane.
SDI (Pin 6): Digital Data Input. The A/D configuration
word is shifted into this input.
SDO (Pin 7): Digital Data Output. The A/D conversion
result is shifted out of this output.
SCK (Pin 8): Shift Clock Input. This clock synchronizes
the serial data transfer.
V_CC (Pin 9): Positive Supply. This supply must be kept
free of noise and ripple by bypassing directly to the
analog ground plane.
V_REF (Pin 10): Reference Input. The reference input defines
the span of the A/D converter and must be kept free of
noise with respect to AGND.
LTC1865 (SO-8 Package)
CONV (Pin 1): Convert Input. A logic high on this input
starts the A/D conversion process. If the CONV input is
left high after the A/D conversion is finished, the part
powers down. A logic low on this input enables the SDO
pin, allowing the data to be shifted out.
CH0, CH1 (Pins 2, 3): Analog Inputs. These inputs must
be free of noise with respect to GND.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
SDI (Pin 5): Digital Data Input. The A/D configuration
word is shifted into this input.
SDO (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this output.
SCK (Pin 7): Shift Clock Input. This clock synchronizes
the serial data transfer.
V_CC (Pin 8): Positive Supply. This supply must be kept
free of noise and ripple by bypassing directly to the analog
ground plane. V_REF is tied internally to this pin.
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