Rainbow-electronics MAX5550 Bedienungsanleitung PDF herunterladen (Seite 14)

MAX5550

Power Sequencing

Ensure that the voltage applied to REFIN does not

exceed V

at any time. If proper power sequencing is

not possible, connect an external Schottky diode

between REFIN and V

to ensure compliance with the

absolute maximum ratings.

Power-Supply Bypassing and Ground

Management

Digital or AC transient signals on GND create noise at

the analog output. Return GND to the highest quality

ground plane available. For extremely noisy environ-

ments, bypass REFIN and V

to GND with 1µF and

0.1µF capacitors with the 0.1µF capacitor as close to

the device as possible. Careful PC board ground layout

minimizes crosstalk between the DAC outputs and

digital inputs.

Dual, 10-Bit, Programmable, 30mA

High-Output-Current DAC

14 ______________________________________________________________________________________

CONTROLLER

DEVICE

DIN(0)

DOUT(0)

SCLK

MAX5550

DIN(1)

DOUT(1)

SCLK

MAX5550

DIN(2)

DOUT(2)

SCLK

MAX5550

Figure 8. Daisy-Chain Configuration

CS/AO

SPI/I2C

SCLK/SCL

FSADJB

OUTB

OUTA

12 10 9

N.C.

GND

REFIN

N.C.

DOUT/A1

MAX5550

DIN/SDA FSADJA

N.C.

THIN QFN (3mm x 3mm)

TOP VIEW

Pin Configuration

Chip Information

PROCESS: BiCMOS

1 2 ... 9 10 11 12 13 14 15

High-Output-Current DAC 1

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