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RF212 Datasheet

  • RF212

  • Image-Reject Front End for Dual or Tri-Band GSM Applications

  • ETC

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RF212
Image-Reject Front End for Dual or Tri-Band GSM Applications
The RF212 device is available as a dual-band (EGSM900/DCS1800) front end or
as a tri-band (EGSM900/DCS1800/PCS1900) front end for Global System for
Mobile Communications (GSM) mobile telephony applications. Each device
integrates all the required front-end components after the frequency pre-select
filters. These components include the Low Noise Amplifiers (LNAs), the internal
image-reject filters, mixers, and a Local Oscillator (LO) amplifier.
The main advantage of the RF212 is its ability to provide a minimum of 35 dB of
image rejection for each band. The block diagrams of the devices are shown in
Figures 1 and 2. The device packages and pin configurations are shown in Figures
3 and 4.
Features
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Supports EGSM
LNA and mixer for RF to IF conversion
12 dB or 20 dB switchable gain step
Minimum 35 dB of image rejection
No external post-LNA filters required
Common Intermediate Frequency (IF) port for all
bands
IF range from 350 MHz to 450 MHz
High isolation LO input buffer
Differential IF output
High dynamic range with low current consumption
Three-cell battery operation (2.7 to 3.6 V)
20-pin Exposed paddle, Thin Shrink Small Outline
Package (ETSSOP)
Applications
鈥?/div>
Dual/tri-band digital cellular mobile telephony
(EGSM900/DCS1800, or
EGSM900/DCS1800/PCS1900)
LOIN
LOIN
LNA900IN
IFout
LNA900IN
IFout
LNA1800IN
LNA1800IN
LNA1900IN
Band Select 1
control
Band Select 1
Band Select 2
control
Step
Sel
Gain
Sel
C0002
Step
Sel
Gain
Sel
C0001
Figure 1. RF212 Dual-Band Device Block Diagram
Figure 2. RF212 Tri-Band Device Block Diagram
Data Sheet
Conexant
Proprietary Information and Specifications are Subject to Change
Doc. No. 100780D
May 24, 2000

RF212 PDF文件相關(guān)型號

RF212-11,RF212-21

RF212相關(guān)型號PDF文件下載

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  • 英文版
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