LTC1655CS8 datasheet(5/12 Pages) LINER

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LTC1655

PIN FUNCTIONS

CLK (Pin 1): The TTL Level Input for the Serial Interface

Clock.

DIN (Pin 2): The TTL Level Input for the Serial Interface

Data. Data on the DIN pin is latched into the shift register

on the rising edge of the serial clock and is loaded MSB

first. The LTC1655 requires a 16-bit word.

CS/LD (Pin 3): The TTL Level Input for the Serial Inter-

face Enable and Load Control. When CS/LD is low the

CLK signal is enabled, so the data can be clocked in.

When CS/LD is pulled high, data is loaded from the shift

DOUT (Pin 4): Output of the Shift Register. Becomes valid

on the rising edge of the serial clock and swings from GND

to VCC.

GND (Pin 5): Ground.

REF (Pin 6): Reference. Output of the internal reference is

2.048V. There is a gain of two from this pin to the output.

The reference can be overdriven from 2.2V to VCC/2. When

tied to VCC/2, the output will swing from GND to VCC. The

output can only swing to within its offset specification of

VCC (see Applications Information).

VOUT (Pin 7): Deglitched Rail-to-Rail Voltage Output. VOUT

clears to 0V on power-up.

VCC (Pin 8): Positive Supply Input. 4.5V ≤ VCC ≤ 5.5V.

Requires a bypass capacitor to ground.

TI I G DIAGRA

D15

MSB

D14

D13

LSB

t 8

CLK

DIN

DOUT

CS/LD

1655 TD

D15

PREVIOUS WORD

D14

PREVIOUS WORD

D15

CURRENT WORD

D13

PREVIOUS WORD

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