DAC1222 datasheet(8/16 Pages) TI1

No de pièce	DAC1222

Description	10-Bit Binary Multiplying D/A Converter

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Fabricant	TI1 [Texas Instruments]

Site Internet	http://www.ti.com

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Typical Applications (Continued)

VOUT e

b

VREF

A12aA24aA38a A10

1024

J

where VREF can be an AC signal

By connecting the DAC in the feedback loop of an opera-

tional amplifier a linear digitally control gain block can be

realized

Note that with all digital inputs low the gain of the amplifier

is infinity that is the op amp will saturate In other words we

cannot divide the VREF by zero

FIGURE 10 Analog-to-Digital Divider (or Digitally Gain Controlled Amplifier)

VOUT e VREF

%

A1

2

a

A2

4

a

A10

1024

A1

2

a

A2

4

a

A10

1024

–

or VOUT e VREF

1023bN

N

J

where 0 s N s 1023

N e 0 for AN e all zeros

N e 1 for A10 e 1 A1–A9 e 0

N e 1023 for AN e all 1’s

FIGURE 11 Digitally controlled Amplifier-Attenuator

TLH5689 – 7

http

www nationalcom

7

Numéro de pièce similaire - DAC1222

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DAC1222 Fiches technique(PDF) 8 Page - Texas Instruments

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