MAX4473EUA+ by Analog Devices

Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications


The MAX4473 PA power control IC is intended for closed-loop bias control of GSM power amplifiers. The device facilitates accurate control of the current delivered to the power amplifier (PA) through a control voltage. The error amplifier senses the voltage drop across an external current-sense resistor placed between the supply and the PA. The output of the error amplifier adjusts the PA gain until the current is proportional to the power control voltage applied to the MAX4473. This unique topology is useful in time-division-multiple-access (TDMA) systems, such as GSM, where accurate transmit burst shaping and power control is required. User-selectable current sensing and gain setting resistors maximize flexibility. The MAX4473 operates from a single 2.7V to 6.5V supply and typically draws 1.2mA of supply current. The error amplifier has a common-mode range that extends from 1V to VCC. The power control input and error amplifier outputs swing rail-to-rail. A low-power shutdown mode reduces supply current to less than 1µA and activates an on-board active pull-down at the error amplifier output. Fast enable/disable times of 0.9µs reduce average power consumption without compromising dynamic performance. The MAX4473 is available in a space-saving 8-pin µMAX® package.

Where to Buy

Prices starting from US$2.93

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Farnell
from US$4.66
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Analog Devices
from US$2.93
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element14
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Features

Optimized for GSM Timing Requirements
2.7V to 6.5V Single-Supply Operation
1.2mA Supply Current
≤ 1µA Supply Current in Shutdown Mode
Guaranteed 1.5µs Enable/Disable Times
Active Output Pull-Down in Shutdown Mode
Rail-to-Rail Error Amplifier Output
Rail-to-Rail Power Control Input
Output Drive Capability–500Ω and 300pF Loads
1V to VCC Current Sense Input Common-Mode Voltage Range
No Phase-Reversal for Common-Mode Voltage from 0 to VCC
External Current Sensing and Gain Setting Resistors Maximize Flexibility
Available in a Space-Saving 8-Pin µMAX

Specifications

Unity Gain BW (MHz) (typ) 2
Input IBIAS (nA) (max) 1000
VOS (µV) (max) 2000
VSUPPLY (Total) (V) (min) 2.7
VSUPPLY (Total) (V) (max) 6.5
# Amplifiers 1
Rail to Rail Input/Output
Package/Pins UMAX/8
BudgetaryPrice (See Notes) 1.95


MAX4473EUA+ Special Function by Analog Devices

POWER CONTROL AMPLIFIER UMAX-8

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function Power Control Amplifier For GSM
Supply Voltage Min 2.7V
Supply Voltage Max 6.5V
IC Package Type µMAX
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL -
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Low-Cost, Low-Voltage, PA Powe | Analog Devices
POWER CONTROL AMPLIFIER, UMAX-8 | Farnell
Power Control Amplifier, Umax-8 | Newark Electronics

Frequently Asked Questions

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Is the MAX4473EUA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX4473EUA+ have stock available?

Authorised distributors including Analog Devices, element14, Farnell and Newark Electronics have stock available or on a lead time for MAX4473EUA+ .

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