MAX5548 Maxim Integrated Products, MAX5548 Datasheet

MAX5548

Manufacturer Part Number

MAX5548

Description

High-Output-Current DAC

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX5548.pdf (15 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

MAX5548ETE+

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Maxim Integrated Products

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The MAX5548 dual, 8-bit, digital-to-analog converter

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

MAX5548 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 MAX5548 typically consumes 1.5mA per DAC in

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

mode. The MAX5548 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

MAX5548. The maximum programmable output current

value is set using software and an adjustment resistor.

The MAX5548 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.

19-3836; 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-

C*-/SPI™-compatible

Applications

Dual, 8-Bit, Programmable, 30mA

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

MAX5548ETE

SPI/I2C

Shutdown (±1µA max)

Temperature Range

Chaining in SPI Mode

Software and Adjustment Resistor

PART

SCLK/SCL

DAC REGISTER A

+1.25V

16-BIT INPUT REGISTER

REF

DIN/SDA

DAC REGISTER B

CS/A0

BUFFER

REFIN

-40°C to

RANGE

TEMP

+85°C

DOUT/A1

C- or SPI-Compatible Interface

Ordering Information

8-BIT CURRENT-STEERING

Functional Diagram

8-BIT CURRENT-STEERING

DAC B

PIN-

PKG

16 Thin

QFN

DAC A

GND

MAX5548

PKG

CODE

T1633F-3

Features

MARK

TOP

ACY

OUTA

FSADJA

OUTB

FSADJB

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