Rainbow-electronics MAX5547 Bedienungsanleitung PDF herunterladen

General Description

The MAX5547 dual, 10-bit, dual range, digital-to-analog

converter (DAC) sinks up to 3.6mA of current, making it

ideal for laser-driver-control applications. Parallel the

MAX5547 outputs to sink higher current (up to 7.2mA

max). Operating from a single +2.7V to +5.25V

supply, the MAX5547 typically consumes 1mA

(internal reference).

The MAX5547 operates from a precision +2.5V internal

4ppm/°C reference or an external reference in the

+2.45V to +2.55V range. The maximum full-scale cur-

rent-sink range is software programmable to 3.6mA or

1.2mA for each DAC. A 10MHz SPI™-compatible serial

interface configures the device.

The MAX5547 is available in a 3mm x 3mm x 0.8mm 8-

pin TDFN package and is specified over the -40°C to

+85°C extended temperature range.

Applications

Laser-Driver Control

Pin-Diode Bias Currents

Modulation Currents

Average Power

Extinction Ratios

Features

♦ Dual Current-Sink DACs

♦ 10-Bit Resolution

♦ Two Software-Programmable Full-Scale Current

Ranges: 3.6mA or 1.2mA

♦ Parallelable Outputs for Up to 7.2mA (max)

♦ +2.5V Internal Reference Drifts Only 4ppm/°C

♦ +2.7V to +5.25V Single-Supply Operation

♦ INL: ±4 LSB (1.2mA Output)

♦ DNL: ±0.75 LSB (Guaranteed Monotonic)

♦ Low +0.8V Output Compliance

♦ Ultra-Small, 3mm x 3mm x 0.8mm, 8-Pin TDFN

Package

MAX5547

Dual, 10-Bit, Current-Sink Output DAC

________________________________________________________________ Maxim Integrated Products 1

19-3988; Rev 0; 2/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

+2.7V TO +5.25V

+2.5V

+3.3V

OUTA

OUTB

DIN

SCLK

MICROCONTROLLER WITH ADC

REF

BIASSET

MODSET

DIS

BC_MON

OUT-

OUT+

BIAS

AIN0

AIN1

AIN2

MOSI SCLK

GND

REF

FERRITE

BEAD

I/O1

I/O2

I/O3

TX_DISABLE

MOD-DEF1

MOD-DEF2

+3.3V

GND

+3.3V

MAX5547 MAX3736

Typical Operating Circuit

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

PKG

CODE

MAX5547ETA

-40°C to +85°C 8 TDFN-EP* APF

T833-2

SPI is a trademark of Motorola, Inc.

*EP = Exposed pad.

Pin Configuration appears at end of data sheet.

1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1 - Typical Operating Circuit

General DescriptionThe MAX5547 dual, 10-bit, dual range, digital-to-analogconverter (DAC) sinks up to 3.6mA of current, making itideal for laser-drive

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX5547Dual, 10-Bit, Current-Sink Output DAC10 ______________________________________________________________________________________CONTROL BITSMSBDA

Seite 3

MAX5547Dual, 10-Bit, Current-Sink Output DAC______________________________________________________________________________________ 11REFGNDDIN12OUTAOU

Seite 4 - MAX5547 toc03

MAX5547Dual, 10-Bit, Current-Sink Output DACMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Ma

Seite 5

MAX5547Dual, 10-Bit, Current-Sink Output DAC2 _______________________________________________________________________________________ABSOLUTE MAXIMUM

Seite 6

MAX5547Dual, 10-Bit, Current-Sink Output DAC_______________________________________________________________________________________ 3ELECTRICAL CHARAC

Seite 7

MAX5547Dual, 10-Bit, Current-Sink Output DAC4 _______________________________________________________________________________________ELECTRICAL CHARAC

Seite 8 - Pin Description

MAX5547Dual, 10-Bit, Current-Sink Output DAC_______________________________________________________________________________________ 5Typical Operating

Seite 9 - Applications Information

MAX5547Dual, 10-Bit, Current-Sink Output DAC6 _______________________________________________________________________________________Typical Operating

Seite 10 - Chip Information

MAX5547Dual, 10-Bit, Current-Sink Output DAC_______________________________________________________________________________________ 7Typical Operating

Seite 11 - Functional Diagram

MAX5547Detailed DescriptionThe MAX5547 10-bit, dual-range, current-sink DACoperates with serial data clock rates up to 10MHz. Thedouble-buffered DAC i

Seite 12 - Package Information

Set CS low to begin clocking input data at DIN on thefalling edge of SCLK (see Figure 1). Serial communica-tions to the shift register consist of a 16

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Rainbow-electronics MAX5547 Bedienungsanleitung

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Inhaltsverzeichnis

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