ADC-305-3 查看數據表（PDF） - Murata Power Solutions

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ADC-305-3

8-Bit, 20MHz CMOS A/D Converters

Murata Power Solutions 

ADC-305

8-Bit, 20MHz CMOS A/D Converters

Table 1. Digital Output Coding

VIN

CODE

OV

Zero

+0.9922V +1/2FS –1LSB

+1.000V

+1/2FS

+1.9922V

+FS

STEP

DEC HEX

0

00

127

7F

128

80

255

FF

DATA BITS OUT

MSB

LSB

0000 0000

0111 1111

1000 0000

1111 1111

Ta

ANALOG

INPUT

N

N+1

TPW1

TPW0

N+2

N+3

N+4

CLOCK

DATA

N-3

N-2

N-1

OUTPUT

N

N+1

Td= 30ns max.

Figure 2. Timing Diagram

+DVS

+DGND

Digital Output Circuit, Bit1 through Bit 8

+AVS

VRT

VRB

17

23

AGND

Voltage Reference (VRT,VRB)

Equivalent Circuit

+DVS

+AVS

OE

VIN

19

A/D CLK

DGND

Equivalent Circuit for OE and A/D CLK

OE - Low data is output when high digital

output pins turn to high impedance.

AGND

Analog Input

VRBS AGND

22

Generates +0.6V

when shorted with VB

Figure 3. Equivalent Circuits

+AVS

VRTS

16

Generates +2.6V

when shorted with VT

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MDA_ADC-305.B01 Page 3 of 6

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