HI2325IN 查看數據表（PDF） - Intersil

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HI2325IN

3.3V Dual 8-Bit, 40MSPS A/D Converter with Internal Reference and Digital Clamp

Intersil 

HI2325

TABLE 1. OUTPUT MODE

INPUT

OUTPUT

A7

A6

A5

A4

A3

A2

A1

A0

TEST

STB

2S/B

B7

B6

B5

B4

B3

B2

B1

B0

L

L

L

Binary Code

L

L

H

2’s Compliment Code

L

H

X

Hi-Z

H

X

X

Test Mode

TABLE 2. DIGITAL OUTPUT

The following table shows the relationship between analog input voltage and digital output code.

DIGITAL OUTPUT CODE

INPUT SIGNAL

VOLTAGE

STEP

BINARY CODE

MSB

LSB

2’s COMPLIMENT CODE

MSB

LSB

VART, VBRT

255

11111111

011111111

:

:

:

:

:

128

10000000

00000000

:

127

01111111

11111111

:

:

:

:

VARB, VBRB

0

00000000

10000000

REF2

L

L

L

L

H

H

H

H

SETTING

REF1

L

L

H

H

L

L

H

H

TABLE 3. DIGITAL CLAMP REFERENCE LEVEL

REFERENCE LEVEL

REF0

MODE

DECIMAL

BINARY

L

0

1

00000001

H

1

16

00010000

L

2

32

00100000

H

3

128

10000000

L

4

254

11111110

H

5

239

11101111

L

6

223

11011111

H

7

127

01111111

2’s COMPLIMENT

10000001

10010000

10100000

00000000

01111110

01101111

01011111

11111111

6

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