RF142

Power Amplifier Controller

4

Conexant

100774A

September 7, 2000

Proprietary Information and Specifications are Subject to Change

Table 4. RF142 Electrical Characteristics (2 of 2)

°°°°C, Vcc = 3.6 V)

Parameter

Symbol

Test Condition

Min

Typ

Max

Units

GSM Maximum Sink/Source Control Current

Ivpcgsm

BAND <= 0.8 V

90

100

110

mA

DCS Maximum Sink/Source Control Current

Ivpcdsc

BAND >= 1.90 V

70

80

90

mA

VPCGSM off voltage

ENABLE = high

BAND = low

0.1

V

VPCDCS off voltage

ENABLE = high

BAND = high

0.1

V

Control output noise

GSM and DCS

12

nV/

√Hz

Error amplifier gain (Note)

Low gain on shaper

35

40

44

dB

Auxiliary amplifier gain

25

28

31

dB

Standby current

ENABLE = low

20

µA

Supply current

VPCGSM and VPCDCS source current = 0 mA

58

75

mA

1.9

V

0.8

V

Note. Included Gain Shaper

Logarithmic

Detector

Amp 2

Amp 1

Gain

Shaper

VPCGSM

VPCDCS

RFPC+

RFPC-

VAPC+

VAPC-

AUX+

AUX-

VCC2

CAP+

CAP-

VREF

VMP

BAND

DC Bias

Circuitry

ENABLE

VCC1

GND

Dual Band

PA

GND

DCSIN

GND

GSMIN

GND

VCC

GND

VCC

GND

GSMOUT

GND

DCSOUT

GND

GSMAPC

GND

DCSAPC

FEEDBACK

TO MIXER

TXDCS

TXGSM

T/R

SW

T/R

SW

DIPLEXER

TO

ANTENNA

FILTER

VPA

VPAC

PAEN

PA RAMP

CONTROL

RF142

C473

Figure 3. Typical RF142 Application Circuit