AD8842AR-REEL datasheet(5/13 Pages) AD

部品番号	AD8842AR-REEL

部品情報	8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC

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5 / 13 page

AD8842

REV.

–5–

Table I. Serial Input Decode Table

Table II. Input Logic Control Truth Table

CLK

LD

PR

Input Shift Register Operation

L

H

No Operation

↑

L

H

Shift One Bit in from SDI (Pin 20), Shift One Bit* Out from SDO (Pin 18)

X

L

All DAC Registers = 80H

X

Η

H

Load Serial Register Data into DAC(X) Register

X

H

X

Serial Data Input Register Loading Disabled

*Data shifted into the SDI pin appears twelve clocks later at the SDO pin.

LSB

D0

D1

D2

D3

D4

D5

D6

MSB

D7

LSB

A0

A1

A2

MSB

A3

LAST

FIRST

A3

A2

A1

A0

ADDRESS

DATA

MSB

LSB

DAC UPDATED

NO OPERATION

DAC A

DAC B

DAC C

DAC D

DAC H

NO OPERATION

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

D7

D6

D5

D4

D3

D2

D1

D0

DAC OUTPUT VOLTAGE

VOUT = (D/128 –1) x VIN

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

MSB

LSB

–VIN

(1/128–1) x VIN

(127/128–1) x VIN

(128/128–1) x VIN = 0V; (PRESET VALUE)

(129/128–1) x VIN

(254/128–1) x VIN

(255/128–1) x VIN ≈ VIN

•

••

•

••

•

0

1

0

1

A

同様の部品番号 - AD8842AR-REEL

メーカー	部品番号	データシート	部品情報
Analog Devices	AD8842AR-REEL	1Mb / 13P	8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC REV. A

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