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)
NC
LNA900GND
LNA900IN
0
90
90
IFOUT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
MIXVCC
MIXGND
BYP900
IFOUT+
IFOUT-
BYP1800
BANDSEL
LOIN
LOGND
ADJMIX
C067
BIASGND
LNA900IN
GAINSEL
BIASVCC
IRM
LNAVCC
0
LNA1800IN
90
LOIN
GAINSEL
LNA1800IN
LNA1800GND
BANDSEL
BYP900
BIAS
ENA
BYP1800
C069
Figure 1. RF210(A/B) Block Diagram
Figure 2. RF210(A/B) Pin Configuration – 20-Pin TSSOP
Data Sheet
Conexant
Proprietary Information and Specifications are Subject to Change
Doc. No. 100775A
October 20, 1999
CONEXANT [ CONEXANT SYSTEMS, INC ]
