MAX189ACWE(2012) Ver la hoja de datos (PDF) - Maxim Integrated

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componentes Descripción

Fabricante

MAX189ACWE
(Rev.:2012)

+5V, Low-Power, 12-Bit Serial ADCs

Maxim Integrated 

MAX187/ MAX189

+5V, Low-Power, 12-Bit Serial ADCs

Pin Configurations

TOP VIEW

+

1 VDD

SCLK 8

2

AIN

MAX187

MAX189

CS

7

3 SHDN

DOUT 6

4 REF

GND 5

PDIP

VDD 1

N.C. 2

AIN 3

N.C. 4

N.C. 5

SHDN 6

N.C. 7

REF 8

+

MAX187

MAX189

Wide SO

16 SCLK

15 CS

14 N.C.

13 N.C.

12 DOUT

11 DGND

10 AGND

9 N.C.

Pin Description

PIN

PDIP WIDE SO

1

1

2

3

3

6

4

8

5

—

—

10

—

11

6

12

7

15

8

16

—

2, 4, 5, 7,

9, 13. 14

NAME

VDD

AIN

SHDN

REF

GND

AGND

DGND

DOUT

CS

SCLK

N.C.

FUNCTION

Supply Voltage. +5V, Q5%

Sampling Analog Input. 0V to VREF range

Three-Level Shutdown Input. Pulling SHDN low shuts the MAX187/MAX189 down to 10FA

(max) supply current. Both MAX187 and MAX189 are fully operational with either SHDN

high or unconnected. For the MAX187, pulling SHDN high enables the internal reference,

and letting SHDN unconnected disables the internal reference and allows for the use of an

external reference.

Reference Voltage—sets analog voltage range and functions as a 4.096V output for the

MAX187 with enabled internal reference. REF also serves as a +2.5V to VDD input for a

precision reference for both MAX187 (disabled internal reference) and MAX189. Bypass

with 4.7FF if internal reference is used, and with 0.1FF if an external reference is applied.

Analog and Digital Ground

Analog Ground

Digital Ground

Serial Data Output. Data changes state at SCLK’s falling edge.

Active-Low Chip Select. Initiates conversions on the falling edge. When CS is high, DOUT is

high impedance.

Serial Clock Input. Clocks data out with rates up to 5MHz.

No Connection. Not internally connected. Connect to AGND for best noise performance.

Maxim Integrated

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