Rainbow-electronics MAX5131 Manual de usuario descargar pdf (Pagina 8)

MAX5130/MAX5131

+3V/+5V, 13-Bit, Serial Voltage-Output DACs

with Internal Reference

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

= +5V (MAX5130), V

= +3V (MAX5131), R

= 5kΩ, C

= 100pF, OS = AGND, T

= +25°C, unless otherwise noted.)

2V/div

OUT

500mV/div

2µs/div

MAX5131

DYNAMIC RESPONSE FALL TIME

MAX5130/31-22

SCLK

2V/div

OUT

500µV/div

AC COUPLED

2µs/div

MAX5131

DIGITAL FEEDTHROUGH (SCLK, OUT)

MAX5130/31-23

2V/div

OUT

100mV/div

AC COUPLED

5µs/div

MAX5131

MAJOR CARRY TRANSITION

MAX5130/31-24

Pin Description

Offset Adjust (Analog Input)OS1

FUNCTIONNAME

Analog Output Voltage. High impedance if part is in shutdown.OUT2

Power-Down Lockout (Digital Input)

1: Normal operation.

0: Disallows shutdown (device cannot be powered down).

PDL

Reset Value Input (Digital Input)

1: Tie to V

to select midscale as the output reset value.

0: Tie to DGND to select 0V as the output reset value.

RSTVAL3

Active-Low Chip-Select Input (Digital Input)

Serial Clock InputSCLK8

Serial Data Input. Data is clocked in on the rising edge of SCLK.DIN7

Reset DAC Input (Digital Input). Clears the DAC to its predetermined (RSTVAL) output state. Clearing the

DAC will cause it to exit a software shutdown state.

CLR

Serial Data OutputDOUT10

Power-Down Input (Digital Input). Pulling PD high when PDL = V

places the IC into shutdown with a

maximum shutdown current of 20µA.

PD12

User-Programmable Output (Digital Output)UPO11

Buffered Reference Output/Input. In internal reference mode, the reference buffer provides a +2.5V

(MAX5130) or +1.25V (MAX5131) nominal output, externally adjustable at REFADJ. In external reference

mode, disable the internal reference by pulling REFADJ to V

and applying the external reference to REF.

REF14

Positive Power Supply. Bypass with a 0.1µF capacitor in parallel with a 4.7µF capacitor to AGND.V

Analog Reference Adjust Input. Bypass with a 33nF capacitor to AGND. Connect to V

when using an

external reference.

REFADJ15

Analog GroundAGND13

Digital GroundDGND9

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 19 20

MAX5130/MAX5131 1

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Rainbow-electronics MAX5131 Manual de usuario Pagina 8

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