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RF210B View Datasheet(PDF) - Conexant Systems

Part NameDescriptionManufacturer
RF210B Dual-Band, Image-Reject Downconverters For GSM Applications Conexant
Conexant Systems Conexant
RF210B Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
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
0
90
90
GAINSEL
IRM
0
LNA1800IN
90
BANDSEL
BIAS
BYP900 BYP1800
Figure 1. RF210(A/B) Block Diagram
IFOUT
LOIN
C069
NC 1
LNA900GND
2
20
MIXVCC
19
MIXGND
BIASGND
3
LNA900IN
4
BIASVCC
5
LNAVCC
6
GAINSEL
7
LNA1800IN
8
18
BYP900
17
IFOUT+
16
IFOUT-
15
BYP1800
14
BANDSEL
13
LOIN
LNA1800GND
9
ENA 10
12
LOGND
11
ADJMIX
C067
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
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