ALT6708 datasheet(7/11 Pages) ANADIGICS

7 / 11 page

Data Sheet - Rev 2.3

03/2012

ALT6708

APPLICATION INFORMATION

To ensure proper performance, refer to all related

Application Notes on theANADIGICS web site:

http://www.anadigics.com

Shutdown Mode

Thepoweramplifiermaybeplacedinashutdownmode

byapplyinglogiclowlevels(seeOperatingRanges

table)totheVEN, VMODE1 and VMODE2 voltages.

Bias Modes

The power amplifier may be placed in either Low,

Medium or High Bias modes by applying the

appropriatelogiclevel(seeOperatingRangestable)

Table 6: Bias Control

to the VMODEvoltages.TheBiasControltablebelow

liststherecommendedmodesofoperationforvarious

applications.

Threeoperatingmodesarerecommendedtooptimize

currentconsumption.HighBias/HighPoweroperating

modeisforPOUTlevels>16dBm.At~17dBm-6.5

dBm,thePAshouldbe“ModeSwitched”toMedium

Power Mode. For POUT levels < ~7.5 dBm, the PA

canbeswitchedtoLowPowerModeforevenlower

quiescentcurrentconsumption.

Figure 10: Evaluation Board Schematic

330 pF

2.2 µF ceramic

RFIN

VBATT

VMODE1

RFOUT

RFIN

GND

VCC

VEN

CPLOUT

VCC

0.01 µF

VBATT

VMODE1

VEN

CPLIN

VMODE2

2.2 µF

0.01 µF

GND at slug

CPLIN

CPLOUT

RFOUT

100 pF

APPLICATION

POUT

LEVELS

BIAS

MODE

VEN

VMODE1 VMODE2

vcc

VBATT

Lowpower

(LowBiasMode)



+7.5 dBm

Low

+1.8 V

+1.8 V 3.1 - 4.35 V

> 3.1 V

Medpower

(MediumBiasMode)

>+6.5dBm



+17 dBm

Low

+1.8 V

0 V

3.1 - 4.35 V

> 3.1 V

Highpower

(HighBiasMode)

>+16dBm

High

+1.8 V

0 V

3.1 - 4.35 V

> 3.1 V

Shutdown

0 V

3.1 - 4.35 V

> 3.1 V

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