MAX5550ETE+T【PDF 1/15 页】IC DAC 10BIT DUAL 30MA 16-TQFN

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General Description

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 1A (max) in shutdown

mode. The MAX5550 also features low output leakage

current in shutdown mode (±1A 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 I2C-/SPI-compatible

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.

Applications

PIN Diode Biasing

RF Attenuator Control

VCO Tuning

Features

Pin-Selectable I2C- or SPI-Compatible Interface

Guaranteed Low Output Leakage Current in

Shutdown (±1A max)

Guaranteed Monotonic over Extended

Temperature Range

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

Chaining in SPI Mode

+2.7V to +5.25V Single-Supply Operation

16-Pin (3mm x 3mm) Thin QFN Package

Programmable Output Current Range Set by

Software and Adjustment Resistor

MAX5550

Dual, 10-Bit, Programmable, 30mA

High-Output-Current DAC

________________________________________________________________ Maxim Integrated Products

Ordering Information

19-3871; Rev 2; 5/06

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.

EVALUATION

KIT

AVAILABLE

PART

PIN-PACKAGE

PKG

CODE

TOP

MARK

MAX5550ETE 16 Thin QFN-EP*

T1633F-3

ACZ

SPI is a trademark of Motorola, Inc.

+1.25V

REF

REFIN

BUFFER

10-BIT CURRENT-STEERING

DAC A

OUTA

VDD

FSADJA

VDD

OUTB

FSADJB

GND

DOUT/A1

CS/A0

DIN/SDA

SCLK/SCL

SPI/

I2C

16-BIT INPUT REGISTER

DAC REGISTER A

DAC REGISTER B

10-BIT CURRENT-STEERING

DAC B

MAX5550

Functional Diagram

Pin Configuration appears at end of data sheet.

*EP = Exposed paddle.

Note: Device is specified over the -40°C to +85°C operating

range.

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