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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX11015 Datasheet

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

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19-3985; Rev 3; 11/08
EVAALVUAAILTAIOBNLEKIT
Automatic RF MESFET Amplifier
Drain-Current Controllers
General Description
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 0 to
625mV range. External diode-connected transistors mon-
itor the MESFET temperatures while an internal tempera-
ture sensor measures the local die temperature of the
MAX11014/MAX11015. The internal DAC sets the volt-
ages across the current-sense resistors 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 volt-
ages. Two of the 11 ADC channels are available as gen-
eral-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 self-calibration 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 I2C-compatible serial interface (pin-selec-
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 a -4.5V to -5.5V negative supply (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.
Features
Dual Drain-Current-Sense Gain Amplifier
Preset Gain of 4
±0.5% Accuracy for Sense Voltages Between
75mV and 625mV (MAX11014)
Common-Mode Sense-Resistor Voltage Range
0.5V to 11V (MAX11014)
5V to 32V (MAX11015)
Low-Noise Output GATE Bias with ±10mA GATE
Drive
Fast Clamp and Power-On Reset
12-Bit DAC Controls MESFET GATE Voltage
Internal Temperature Sensor/Dual Remote Diode
Temperature Sensors
Internal 12-Bit ADC Measures Temperature and
Voltage
Pin-Selectable Serial Interface
3.4MHz I2C-Compatible Interface
20MHz SPI-/MICROWIRE-Compatible Interface
Ordering Information
PART
PIN-PACKAGE
AMPLIFIER
MAX11014BGTM+ 48 Thin QFN-EP**
Class A
MAX11015BGTM+* 48 Thin QFN-EP**
Class AB
+ Denotes a lead-free package.
*Future product—contact factory for availability.
**EP = Exposed pad.
Note: All devices are specified over the -40°C to +105°C operating
temperature range.
Pin Configuration and Typical Operating Circuit appear at end
of data sheet.
Applications
Cellular Base-Station RF MESFET Bias Controllers
Point-to-Point or Point-to-Multipoint Links
Industrial Process Control
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX11015 Datasheet

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

No Preview Available !

Automatic RF MESFET Amplifier
Drain-Current Controllers
ABSOLUTE MAXIMUM RATINGS
AVDD to AGND .........................................................-0.3V to +6V
DVDD to DGND.........................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AVSS to AGND ...........................................................-0.3V to -6V
RCS1+, RCS1-, RCS2+, RCS2- to GATEVSS
(MAX11014) ........................................................-0.3V to +13V
RCS1+, RCS1-, RCS2+, RCS2- to AGND
(MAX11015) ........................................................-0.3V to +34V
RCS1- to RCS1+.......................................................-6V to +0.3V
RCS2- to RCS2+.......................................................-6V to +0.3V
GATEVSS to AGND...................................................+0.3V to -6V
GATE1, GATE2 to AGND .....(GATEVSS - 0.3V) to (AVDD + 0.3V)
DVDD to AVDD..........................................-0.3V to (AVDD + 0.3V)
All Other Analog Inputs to AGND ............-0.3V to (AVDD + 0.3V)
PGAOUT1, PGAOUT2 to AGND ..............-0.3V to (AVDD + 0.3V)
SCLK/SCL, DIN/SDA, CS/A0, N.C./A2, CNVST, OPSAFE1,
OPSAFE2 to DGND.............................-0.3V to (DVDD + 0.3V)
DOUT/A1, SPI/I2C, ALARM, BUSY
to DGND ..............................................-0.3V to (DVDD + 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA = +70°C)
48-Pin Thin QFN (derate 27.0mW/°C
above +70°C)..........................................................2162.2mW
Operating Temperature Range .........................-40°C to +105°C
Storage Temperature Range ...............................-60°C to 150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VGATEVSS = VAVSS = -5.5V to -4.75V, VAVDD = +4.75V to +5.25V, VDVDD = +2.7V to VAVDD, external VREFADC = +2.5V, external
VREFDAC = +2.5V, CREFADC = CREFDAC = 0.1µF, VOPSAFE1 = VOPSAFE2 = 0, VRCS1+ = VRCS2+ = +5V, CFILT1 = CFILT3 = 1nF, CFILT2 =
CFILT4 = 1nF, VAGND = VDGND = 0, VADCIN0 = VADCIN1 = 0, VACLAMP1 = VACLAMP2 = -5V, TJ = TMIN to TMAX, unless otherwise noted.
All typical values are at TJ = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
CURRENT-SENSE AMPLIFIER (Note 1)
Common-Mode Input Voltage
Range
MAX11014
VRCS_+ MAX11015
0.5 11.0
V
5 32
Common-Mode Rejection Ratio
CMRR
0.5V < VRCS_+ < 11V for the MAX11014
5V < VRCS_+ < 32V for the MAX11015
90
dB
90
Input-Bias Current
IRCS+
IRCS-
VSENSE < 100mV over the common-mode
range
200
µA
±2
Full-Scale Sense Voltage
VSENSE VSENSE = VRCS_+ - VRCS_-
625 mV
To within ±0.5% accuracy
75 625
Sense Voltage Range
To within ±2% accuracy
20 625 mV
To within ±20% accuracy
2 625
Total Current Set Error
Current-Sense Settling Time
tHSCS
VSENSE = 75mV
Settles to within ±0.5% of final value
±0.1
< 25
±0.5
%
µs
Saturation Recovery Time
Settles to within ±0.5% accuracy, from
VSENSE = 1.875V
< 45
µs
CLASS AB INPUT CHANNEL
Untrimmed Offset
Offset Temperature Coefficient
19 Bits
0 Bits/oC
Gain
4
Gain Error
0.1 %
2 _______________________________________________________________________________________


Part Number MAX11015
Description (MAX11014 / MAX11015) Automatic RF MESFET Amplifier Drain-Current Controllers
Maker Maxim Integrated Products
Total Page 30 Pages
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