LTC2641/LTC2642

9

26412f

PIN FUNCTIONS

LTC2641

REF (Pin 1): Reference Voltage Input. Apply an external

⎯C⎯S (Pin 2): Serial Interface Chip Select/Load Input. When

⎯C⎯S is low, SCLK is enabled for shifting in data on DIN.

When

⎯C⎯S is taken high, SCLK is disabled, the 16-bit input

word is latched and the DAC is updated.

SCLK (Pin 3): Serial Interface Clock Input. CMOS and

TTL compatible.

DIN (Pin 4): Serial Interface Data Input. Data is applied

to DIN for transfer to the device at the rising edge of

SCLK.

⎯C⎯L⎯R (Pin 5): Asynchronous Clear Input. A logic low clears

the DAC to code 0.

5.5V.

GND (Pin 8): Circuit Ground.

Exposed Pad (DFN Pin 9): Circuit Ground. Must be sol-

dered to PCB ground.

LTC2642

REF (Pin 1): Reference Voltage Input. Apply an external

⎯C⎯S (Pin 2): Serial Interface Chip Select/Load Input. When

⎯C⎯S is low, SCLK is enabled for shifting in data on DIN.

When

⎯C⎯S is taken high, SCLK is disabled, the 16-bit input

word is latched and the DAC is updated

SCLK (Pin 3): Serial Interface Clock Input. CMOS and

TTL compatible.

DIN (Pin 4): Serial Interface Data Input. Data is applied

to DIN for transfer to the device at the rising edge of

SCLK.

⎯C⎯L⎯R (Pin 5): Asynchronous Clear Input. A logic low clears

the DAC to midscale.

INV (Pin 7): Center Tap of Internal Scaling Resistors.

Connect to an external amplifier’s inverting input in bipolar

mode.

amplifier’s output in bipolar mode. The bipolar output

5.5V.

GND (Pin 10): Circuit Ground.

Exposed Pad (DFN Pin 11): Circuit Ground. Must be

soldered to PCB ground.