ML2280BIP datasheet(2/20 Pages) MICRO-LINEAR

部件名	ML2280BIP

功能描述	Serial I/O 8-Bit A/D Converters

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制造商	MICRO-LINEAR [Micro Linear Corporation]

网页	http://www.microlinear.com

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2 / 20 page

ML2280, ML2283

2

PIN CONFIGURATION

NAME

FUNCTION

VCC

Positive supply. 5V ± 10%

DGND

Digital ground. 0 volts. All digital inputs and

outputs are referenced to this point.

AGND

Analog ground. The negative reference voltage

for A/D converter.

GND

Combined analog and digital ground.

CH0,

Analog inputs. Digitally selected to be single

VIN+, VIN– ended (VIN) or; VIN+ or VIN– of a differential

input. Analog range = GND - VIN - VCC.

VREF/2

Reference. The analog input range is twice the

positive reference voltage value applied to this

pin.

V+

Input to the Shunt Regulator.

DO

Data out. Digital output which contains result

of A/D conversion. The serial data is clocked

out on falling edges of CLK.

PIN DESCRIPTION

ML2280

Single Differential Input

8-Pin PDIP

ML2283

4-Channel MUX

14-Pin PDIP

NAME

FUNCTION

SARS

Successive approximation register status.

Digital output which indicates that a

conversion is in progress. When SARS goes

to 1, the sampling window is closed and

conversion begins. When SARS goes to 0,

conversion is completed. When CS = 1, SARS

is in high impedance state.

CLK

Clock. Digital input which clocks data in on

DI on rising edges and out on DO on falling

edges. Also used to generate clocks for A/D

conversion.

DI

Data input. Digital input which contains serial

data to program the MUX and channel

assignments.

CS

Chip select. Selects the chip for multiplexer

and channel assignment and A/D conversion.

When CS = 1, all digital outputs are in high

impedance state. When CS = 0, normal A/D

conversion takes place.

CS

VIN+

VIN–

GND

VCC

CLK

DO

VREF/2

1

2

3

4

8

7

6

5

TOP VIEW

V+

CS

CH0

CH1

CH2

CH3

DGND

VCC

DI

CLK

SARS

DO

VREF/2

AGND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ML2280

Single Differential Input

8-Pin SOIC

TOP VIEW

CS

VIN+

VIN–

GND

VCC

CLK

DO

VREF/2

1

2

3

4

8

7

6

5

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