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MAX11015 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX11015 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 69 page  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. *Purchase of I2C components from Maxim Integrated Products, Inc. or one of its sublicensed Associated Companies, conveys a license under the Phillips I2C Patent Rights to use these com- ponents in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Phillips. 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 Automatic RF MESFET Amplifier Drain-Current Controllers ________________________________________________________________ Maxim Integrated Products 1 PART PIN-PACKAGE PKG CODE AMPLIFIER MAX11014BGTM+ 48 Thin QFN-EP** T4877-6 Class A MAX11015BGTM+* 48 Thin QFN-EP** T4877-6 Class AB Ordering Information Applications 19-3985; Rev 0; 2/06 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. SPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. + 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. Cellular Base-Station RF MESFET Bias Controllers Point-to-Point or Point-to-Multipoint Links Industrial Process Control |
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