Data Sheet

Conexant

Doc. No. 100775A

Proprietary Information and Specifications are Subject to Change

October 20, 1999

Do not use for new designs. Use the RF212 device instead

(Data Sheet No. 100780)

RF210A and RF210B

Dual-Band, Image-Reject Downconverters For GSM Applications

The RF210A and RF210B devices are available as a dual-band front end for Global

System for Mobile Communications (GSM) handset applications. Both of these

highly integrated, monolithic devices are optimized for dual-band use in

GSM900/DCS1800 or GSM 900/PCS1900 applications. The devices include two

Low Noise Amplifiers (LNAs), two image-reject mixers, and two Local Oscillator

(LO) buffer amplifiers.

The main advantage of the RF210A and RF210B is their ability to provide 30 dB of

image rejection for both the GSM900 and the DCS1800 (or PCS1900) bands

without requiring the use of a post-LNA image reject filter. A block diagram of the

RF210(A/B) is shown in Figure 1. The device package and pin configuration are

shown in Figure 2.

Features

• LNA/image-reject mixer for RF to IF conversion

• 10 dB (RF210A) or 20 dB (RF210B) switchable

gain for GSM

• 8 dB (RF210A) or 16 dB (RF210B) switchable gain

for DCS/PCS

• 30 dB of image rejection. No post-LNA filtering

required

• High isolation LO input buffer

• Differential IF output

• High dynamic range

• Three-cell battery operation (2.7 to 5 V)

• 20-pin Thin Shrink Small Outline Package

(TSSOP)

Applications

• Dual-band digital cellular mobile telephony

(GSM900/DCS 1800 or GSM900/PCS1900)

LNA900IN

C069

0

90

90

LNA1800IN

GAINSEL

IFOUT

LOIN

IRM

BIAS

BANDSEL

BYP900

BYP1800

0

90

Figure 1. RF210(A/B) Block Diagram

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

NC

LNA900GND

BIASGND

LNA900IN

GAINSEL

LNA1800IN

LNA1800GND

ENA

MIXVCC

MIXGND

BYP900

C067

IFOUT+

IFOUT-

BYP1800

BANDSEL

LOIN

LOGND

ADJMIX

BIASVCC

LNAVCC

Figure 2. RF210(A/B) Pin Configuration – 20-Pin TSSOP