RF212 datasheet(6/9 Pages) ETC

6 / 9 page

RF212

Image-Reject Front End

Conexant

100780D

May 24, 2000

Proprietary Information and Specifications are Subject to Change

Table 7. RF212 Electrical Specifications (3 of 3)

(TA = 25

°°°°C, Vcc = 2.7 V, fIF = 400 MHz, Plo = −−−−10 dBm)

Parameter

Symbol

Test Condition

Min

Typical

Max

Units

PCS1900 Mode (for tri-band device only) (continued)

Input 1 dB compression point

high gain mode

low gain mode

−23

−20

–20

–16

dBm

Input third order intercept point

−12

dBm

Differential IF shunt output resistance

Ω

Image rejection:

fIF = 400 MHz

fIF = 350 or 450 MHz

Local Oscillator (LO)

LO frequency

1275

1640

MHz

LO input return loss (with external matching circuit)

fIF = 400 MHz

−10

LO input power

PLO

−15

−10

−5

dBm

Control Signals (All Modes)

Digital input voltages (ENA, GAINSEL, BANDSEL1,

BANDSEL2, and STEPSEL)

VIH

VIL

Vcc –

0.4

Enable time

tON

µs

Bandselect switching time

µs

Note 1: Assumes

−5 dBm @ 915 MHz blocker at the antenna input attenuated by 17 dB.

Note 2: Assumes

−12 dBm @ 1785 MHz blocker at the antenna input attenuated by 10 dB.

Note 3: Assumes

−12 dBm @ 1910 MHz blocker at the antenna input attenuated by 10 dB.

LNA900IN

LNA1800IN

LNA1900IN

GAINSEL

ENABLE

LOIN

IFOUT-

IFOUT+

Bias

EGSM Rx filter

DCS Rx Filter

BANDSEL1

BANDSEL2

STEPSEL

Control

Vcc

22 pF

2000

47pF

12 nH

22 pF

4.7 nH

27 pF

22 pF

82 nH

2.2 F

10 pF

22 pF

100 pF

12 pF

1.5 pF

3.0 nH

PCS Rx Filter

1.2 pF

3.0 nH

IF SAW

match

2 K || (L1+L2)

differential

C903

Figure 3. Typical RF212 Application Circuit

(for dual-band device, ground pins 9 and 15)

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