RF Micro Devices Inc.

7628 Thorndike Road, Greensboro, NC 27409-9421

DS141006

For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.

The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of

third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended

application circuitry and specifications at any time without prior notice.

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RFCM3316

RFCM3316 Current Adjustment

The RFCM3316 can be operated over a wide range of current to provide maximum required performance with

minimum current consumption. Changing the value of resistor R3 on application circuit allows a variation of the current

between 430mA and 330mA (typ.). Within the recommended range of current between 430mA and 370mA gain (S21)

change is less than 0.2dB and noise figure change is less than 0.1dB.

Current versus Resistor R3 (typical values)

Device Current versus Distortion Degradation (typical values)

Test condition:

=75Ω; V

79 analog channels plus 75 digital channels (-6dB offset)

320

340

360

380

400

420

440

1050

1100

1150

1200

1250

1300

1350

1400

1450

1500

I [mA]

R3 [

Ω]

320

340

360

380

400

420

440

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

I [mA]

CTB and CIN degradation [dB]

CTB

CIN

Device Current [mA],

typical

R3 [

Ω]

=75Ω

430

1500

410

1400

390

1300

370

1240

350

1150

330

1050