RF133 데이터 시트보기 (PDF) - Conexant Systems
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RF133 Datasheet PDF : 17 Pages
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RF133
RF/IF Transceiver For GSM Applications
The RF133 RF/IF Transceiver is a highly integrated, monolithic device optimized
for use in GSM and other TDMA single-band or multi-band applications.
The receive path of the device consists of three Intermediate Frequency (IF)
amplifiers with selectable gain, an I/Q demodulator, baseband filters, DC offset
compensation circuitry, and selectable gain baseband amplifiers.
The transmit path of the device consists of an I/Q modulator and a frequency
translation loop designed to perform frequency up-conversion with high output
spectral purity. The translation loop consists of a phase/frequency detector, a
charge-pump, a mixer, and buffers for the required isolation between the RF input,
Local Oscillator (LO), and IF inputs.
The device package and pin configuration are shown in Figure 1. A block diagram
of the RF133 is shown in Figure 2. The signal pin assignments and functional pin
descriptions are found in Table 1.
GND
TLCPO
VCC
VCC
GND
TXIFIN+
TXIFIN–
GND
TXI+
TXI–
TXQ+
TXQ–
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
DATA
RXIFF+
RXIFF–
SXENA
BPC
GND
VCC
RES2
RES1
VCC
LPFADJ
VCC
Features
• Quadrature demodulator for downconversion
• 80 dB IF gain range and 30 dB baseband gain
range
• Integrated receive baseband filters with tunable
bandwidth
• Integrated transmit path with high phase accuracy
• Reduced filtering requirements for the transmit path
• Broad RF and IF range for multi-band operation
• Integrated selectable local oscillator dividers/phase
shifters and selectable high/low-side injection for
frequency plan flexibility
• On-chip second local oscillator
• Separate enable lines for transmit, receive, and
synthesizer modes for power management
• 48-pin Thin Quad Flat Pack (TQFP) package (7mm
x 7mm)
Applications
• GSM900/DCS1800/PCS1900 digital cellular
telephony
• Multi-mode, multi-band terminals
C100a
Figure 1. RF133 Pin Configuration – 48-pin TQFP
Data Sheet
Conexant
Proprietary Information and Specifications are Subject to Change
100776A
October 8, 1999
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