beautypg.com

Pin description – Rainbow Electronics MAX1449 User Manual

Page 9

background image

MAX1449

10-Bit, 105Msps, Single +3.3V, Low-Power

ADC with Internal Reference

_______________________________________________________________________________________

9

Pin Description

PIN

NAME

FUNCTION

1

REFN

Lower Reference. Conversion range is

±(V

REFP

- V

REFN

).

Bypass to GND with a > 0.1

µF capacitor.

2

COM

Common-Mode Voltage Output. Bypass to GND with a > 0.1

µF capacitor.

3, 9, 10

V

DD

Analog Supply Voltage. Bypass to GND with a capacitor combination of 2.2

µF in parallel with 0.1µF.

4, 5, 8, 11,

14, 30

GND

Analog Ground

6

IN+

Positive Analog Input. For single-ended operation connect signal source to IN+.

7

IN-

Negative Analog Input. For single-ended operation connect IN- to COM.

12

CLK

Conversion Clock Input

13

PD

Power Down Input.
High: Power-down mode
Low: Normal operation

15

OE

Output Enable Input.
High: Digital outputs disabled
Low: Digital outputs enabled

16–20

D9–D5

Three-State Digital Outputs D9–D5. D9 is the MSB.

21

OV

DD

Output Driver Supply Voltage. Bypass to GND with a capacitor combination of 2.2

µF in parallel with

0.1

µF.

22

T.P.

Test Point. Do not connect.

23

OGND

Output Driver Ground

24–28

D4–D0

Three-State Digital Outputs D4–D0. D0 is the LSB.

29

REFOUT

Internal Reference Voltage Output. May be connected to REFIN through a resistor or a resistor-
divider.

31

REFIN

Reference Input. V

REFIN

= 2

(V

REFP

- V

REFN

). Bypass to GND with a > 0.1

µF capacitor.

32

REFP

Upper Reference. Conversion range is

±(V

REFP

- V

REFN

). Bypass to GND with a > 0.1

µF capacitor.