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RF210B fiches techniques PDF

Conexant Systems - (RF210A / RF210B) Image-Reject Downconverters

Numéro de référence RF210B
Description (RF210A / RF210B) Image-Reject Downconverters
Fabricant Conexant Systems 
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RF210B fiche technique
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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
LNA1800IN
IRM
0
90
BANDSEL
BIAS
BYP900 BYP1800
Figure 1. RF210(A/B) Block Diagram
IFOUT
LOIN
C069
NC
LNA900GND
1
2
20 MIXVCC
19 MIXGND
BIASGND
LNA900IN
BIASVCC
LNAVCC
GAINSEL
LNA1800IN
3
4
5
6
7
8
18 BYP900
17 IFOUT+
16 IFOUT-
15 BYP1800
14 BANDSEL
13 LOIN
LNA1800GND
ENA
9
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

PagesPages 8
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