LTC1659IS8-TRPBF Просмотр технического описания (PDF) - Linear Technology

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производитель

LTC1659IS8-TRPBF

12-Bit Rail-to-Rail Micropower DAC in MSOP Package

Linear Technology 

LTC1659

PIN FUNCTIONS

CLK (Pin 1): Serial Interface Clock. Internal Schmitt trigger

on this input allows direct optocoupler interface.

DIN (Pin 2): Serial Interface Data. Data on the DIN pin is

latched into the shift register on the rising edge of the

serial clock.

⎯C⎯S/LD (Pin 3): Serial Interface Enable and Load Control.

When ⎯C⎯S/LD is low the CLK signal is enabled, so the data

can be clocked in. When C⎯ S⎯ /LD is pulled high, data is loaded

from the shift register into the DAC register, updating the

DAC output and the CLK is disabled internally.

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

Valid on the Rising Edge of the Serial Clock.

GND (Pin 5): Ground.

REF (Pin 6): Reference Input. This pin can be tied to VCC.

The output will swing from 0V to REF. The typical input

resistance is 28k.

VOUT (Pin 7): Buffered DAC Output.

VCC (Pin 8): Positive Supply Input. 2.7V ≤ VCC ≤ 5.5V.

Requires a bypass capacitor to ground.

BLOCK DIAGRAM

CLK 1

DIN 2

CS/LD 3

DOUT 4

12-BIT

SHIFT

REGISTER

LD

DAC

REGISTER

POWER-ON

RESET

12-BIT

DAC

8 VCC

+

7 VOUT

–

6 REF

5 GND

1659 BD

1659fa

6

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