LTC1428CS8-50 查看數據表（PDF） - Linear Technology

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LTC1428CS8-50

Micropower 8-Bit Current Sink Output D/A Converter

Linear Technology 

BLOCK DIAGRA

POWER-ON

RESET

CLK

DIN

CS

SHDN

LTC1428-50

LATCH

AND

LOGIC

UP ONLY/

UP/DN

VOLTAGE

REFERENCE

SHDN

LATCH

AND

LOGIC

MODE SELECT

0 = PULSE

1 = SPI

SHDN

8-BIT

CURRENT

DAC

8

CONTROL

LOGIC

CLK

8-BIT REGISTER/COUNTER

UP/DN

8

8

CLK

9-BIT SHIFT REGISTER

Q9

DOUT (LSB)

IOUT

DOUT

1428-50 BD

TEST CIRCUITS

Load Circuit for tDO

1.4V

DOUT

3k

100pF

1428-50 TC01

Voltage Waveforms for tDO

CLK

0.8V

t DO

DOUT

2.4V

0.4V

1428-50 TC03

Load Circuit for tDZ, tDV

DOUT

3k

100pF

5V tDZ WAVEFORM 2, tDV

tDZ WAVEFORM 1

1428-50 TC02

Voltage Waveforms for tDZ, tDV

2.0V

CS

0.8V

DOUT

WAVEFORM 1

(SEE NOTE 1)

DOUT

WAVEFORM 2

(SEE NOTE 2)

2.4V

90%

t DV

t DZ

0.4V

10%

NOTE 1: WAVEFORM 1 IS FOR AN OUTPUT WITH INTERNAL

CONDITIONS SUCH THAT THE OUTPUT IS HIGH UNLESS

DISABLED BY CS

NOTE 2: WAVEFORM 2 IS FOR AN OUTPUT WITH INTERNAL

CONDITIONS SUCH THAT THE OUTPUT IS LOW UNLESS

DISABLED BY CS

1428-50 TC04

5

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