MAX5550 Maxim Integrated Products, MAX5550 Datasheet

MAX5550

Manufacturer Part Number

MAX5550

Description

High-Output-Current DAC

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX5550.pdf (15 pages)

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The MAX5550 dual, 10-bit, digital-to-analog converter

(DAC) features high-output-current capability. The

MAX5550 sources up to 30mA per DAC, making it ideal

for PIN diode biasing applications. Outputs can also be

paralleled for high-current applications (up to 60mA

typ). Operating from a single +2.7V to +5.25V supply,

the MAX5550 typically consumes 1.5mA per DAC in

normal operation and less than 1µA (max) in shutdown

mode. The MAX5550 also features low output leakage

current in shutdown mode (±1µA max) that is essential

to ensure that the external PIN diodes are off.

Additional features include an integrated +1.25V

bandgap reference, and a control amplifier to ensure

high accuracy and low-noise performance. A separate

reference input (REFIN) allows for the use of an external

reference source, such as the MAX6126, for improved

gain accuracy. A pin-selectable I

serial interface provides optimum flexibility for the

MAX5550. The maximum programmable output current

value is set using software and an adjustment resistor.

The MAX5550 is available in a (3mm x 3mm) 16-pin thin

QFN package, and is specified over the extended

(-40°C to +85°C) temperature range.

19-3871; Rev 0; 10/05

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.

*Purchase of I

Inc., or one of its sublicensed Associated Companies, conveys

a license under the Philips I

ponents in an I

to the I

SPI is a trademark of Motorola, Inc.

Pin Configuration appears at end of data sheet.

PIN Diode Biasing

RF Attenuator Control

VCO Tuning

C Standard Specification as defined by Philips.

C components from Maxim Integrated Products,

C system, provided that the system conforms

________________________________________________________________ Maxim Integrated Products

General Description

C Patent Rights to use these com-

Dual, 10-Bit, Programmable, 30mA

C*-/SPI™-compatible

Applications

High-Output-Current DAC

♦ Pin-Selectable I

♦ Guaranteed Low Output Leakage Current in

♦ Guaranteed Monotonic over Extended

♦ Dual Outputs for Balanced Systems

♦ Current Outputs Source Up to 30mA per DAC

♦ Parallelable Outputs for 60mA Applications

♦ Output Stable with RF Filters

♦ Internal or External Reference Capability

♦ Digital Output (DOUT) Available for Daisy

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

♦ 16-Pin (3mm x 3mm) Thin QFN Package

♦ Programmable Output Current Range Set by

MAX5550ETE

SPI/I2C

Shutdown (±1µA max)

Temperature Range

Chaining in SPI Mode

Software and Adjustment Resistor

PART

SCLK/SCL

DAC REGISTER A

16-BIT INPUT REGISTER

+1.25V

REF

DIN/SDA

MAX5550

-40°C to

DAC REGISTER B

RANGE

CS/A0

BUFFER

TEMP

+85°C

REFIN

DOUT/A1

C- or SPI-Compatible Interface

Ordering Information

10-BIT CURRENT-STEERING

Functional Diagram

10-BIT CURRENT-STEERING

PIN-

PACKAGE

16 Thin QFN T1633F-3

DAC B

DAC A

GND

CODE

PKG

Features

MARK

TOP

ACZ

FSADJA

OUTB

OUTA

FSADJB

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