MAX11015 Maxim Integrated Products, MAX11015 Datasheet

MAX11015

Manufacturer Part Number

MAX11015

Description

(MAX11014 / MAX11015) Automatic RF MESFET Amplifier Drain-Current Controllers

Manufacturer

Maxim Integrated Products

Datasheet

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The MAX11014/MAX11015 set and control bias condi-

tions for dual MESFET power devices found in point-to-

point communication and other microwave base

stations. The MAX11014 integrates complete dual ana-

log closed-loop drain-current controllers for Class A

MESFET amplifier operation while the MAX11015 tar-

gets Class AB operation. Both devices integrate SRAM

lookup tables (LUTs) that can be used to store temper-

ature and drain-current compensation data.

Each device includes dual high-side current-sense

amplifiers to monitor the MESFET drain currents

through the voltage drop across the sense resistors in

the range of 0mV to 625mV. External diode-connected

transistors monitor the MESFET temperatures while an

internal temperature sensor measures the local die tem-

perature of the MAX11014/MAX11015. The internal

DAC sets the voltages across the current-sense resis-

tors by controlling the GATE voltages. The internal 12-

bit SAR ADC digitizes internal and external

temperature, internal DAC voltages, current-sense

amplifier voltages and external GATE voltages. Two of

the 11 ADC channels are available as general-purpose

analog inputs for analog system monitoring.

The MAX11014’s gate-drive amplifier functions as an

integrator for the Class A drain-current control loop

while the MAX11015’s gate-drive amplifier functions

with a gain of -2 for Class AB applications. The current-

limited gate-drive amplifier can be fast clamped to an

external voltage independent of the digital input from

the serial interface. Both the MAX11014 and the

MAX11015 include selfcalibration modes to minimize

error over time, temperature, and supply voltage.

The MAX11014/MAX11015 feature an internal reference

and can operate from separate ADC and DAC external

references. The internal reference provides a well-regu-

lated, low-noise +2.5V reference for the ADC, DAC, and

temperature sensors. These integrated circuits operate

from a 4-wire 20MHz SPI™-/MICROWIRE™-compatible

or 3.4MHz I

table). Both devices operate from a +4.75V to +5.25V

analog supply (2.8mA typical supply current), a +2.7V

to +5.25V digital supply (1.5mA typical supply current),

and -4.5V to -5.5V negative supplies (1.1mA supply

current). The MAX11014/MAX11015 are available in a

48-pin thin QFN package specified over the -40°C to

+105°C temperature range.

Purchase of I

Inc. or one of its sublicensed Associated Companies, conveys

a license under the Phillips I

ponents in an I

the I

XX-XXXX; 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.

C Standard Specification as defined by Phillips.

C components from Maxim Integrated Products,

C*-compatible serial interface (pin-selec-

C system, provided that the system conforms to

________________________________________________________________ Maxim Integrated Products

General Description

C Patent Rights to use these com-

Automatic RF MESFET Amplifier

Drain-Current Controllers

♦ Dual Drain-Current-Sense Gain Amplifier

♦ Common-Mode Sense-Resistor Voltage Range

♦ Low-Noise Output GATE Bias with ±10mA GATE

♦ Fast Clamp and Power-On Reset

♦ 12-Bit DAC Controls MESFET GATE Voltage

♦ Internal Temperature Sensor/Dual Remote Diode

♦ Internal 12-Bit ADC Measures Temperature and

♦ Pin-Selectable Serial Interface

+ Denotes a lead-free package.

*Future product—contact factory for availability.

Pin Configuration and Typical Operating Circuit appear at

end of data sheet.

SPI is a trademark of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

MAX11014

BGTM+

MAX11015

BGTM+*

Cellular Base-Station RF MESFET Bias Controllers

Point-to-Point or Point-to-Multipoint Links

Industrial Process Control

Drive

Temperature Sensors

Voltage

PART

Preset Gain of 4

±0.5% Accuracy for Sense Voltages Between

75mV and 625mV (MAX11014)

0.5V to 11V (MAX11014)

5V to 32V (MAX11015)

3.4MHz I

20MHz SPI-Compatible Interface

-40°C to

RANGE

+105°C

TEMP

C-Compatible Interface

PIN-

PACKAGE

48 Thin

QFN

48 Thin

QFN

Ordering Information

Applications

T4877-6

CODE

PKG

Features

AMPLIFIER

Class AB

Class A

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