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CX74016 Datasheet

  • CX74016

  • RF MODULATOR/DEMODULATOR|BIPOLAR|LLCC|72PIN|CERAMIC

  • 19頁

  • ETC

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CX74016
RF/IF Transceiver For GSM Applications
Product Description
The CX74016 RF/IF Transceiver is a highly integrated, monolithic device optimized
for use in Global System for Mobile Communications (GSM) and other Time
Division Multiple Access (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 In-Phase and Quadrature-Phase
(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 section, Local Oscillator (LO), and IF inputs.
In addition, the CX74016 features an on-chip dual-loop UHF/VHF frequency
synthesizer circuit. It includes two sets of reference dividers, phase/frequency
detectors, charge pumps, prescalers, main dividers, lock detector, and control
circuits.
The device package and pin configuration are shown in Figure 1. A block diagram
of the CX74016 is shown in Figure 2. The signal pin assignments and functional pin
descriptions are found in Table 1.
NC
NC
NC
TXENA
TXRFIN+
TXRFIN-
VCC
LO1IN
LO1INR
GND
RXIFIN+
Features
鈥?/div>
Quadrature demodulator for downconversion
鈥?/div>
80 dB IF gain range and 30 dB baseband gain
range
鈥?/div>
Integrated receive baseband filters with tunable
bandwidth
鈥?/div>
Integrated transmit path with high phase accuracy
鈥?/div>
Reduced filtering requirements for the transmit path
鈥?/div>
Broad RF and IF range for multi-band operation
鈥?/div>
Integrated selectable local oscillator dividers/phase
shifters and high/low-side injection for frequency
plan flexibility
鈥?/div>
On-chip second local oscillator
鈥?/div>
Includes fully programmable dual-loop synthesizer
鈥?/div>
Selectable charge pump currents for both
synthesizers
鈥?/div>
Digital lock detector
鈥?/div>
Separate enable lines for transmit, receive, and
synthesizer modes for power management
鈥?/div>
72-pin Land Grid Array (LGA) 10 mm x 10 mm
package
Applications
鈥?/div>
GSM900/DCS1800/PCS1900 digital cellular
telephony
鈥?/div>
Multi-mode, multi-band terminals
RXIFIN-
RXENA
61
60
72
71
70
69
68
67
66
65
64
63
62
59
58
57
NC
GND
TLCPO
VCC
VCC
VCC
GND
TXIFIN+
TXIFIN-
GND
TXI+
TXI-
NC
TXQ+
TXQ-
NC
TXMO+
TXMO-
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
56
LE
CLK
NC
NC
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
NC
NC
RXI+
RXI-
RXQ+
RXQ-
TH
CTH1
CTH2
VCC
UCPO
GND
FREF
GND
VCPO
VCC
LD
36
19
37
NC
DATA
RXIFF+
RXIFF-
SXENA
BPC
GND
VCC
RES2
RES1
VCC
GND
LPFADJ
VCC
NC
NC
NC
NC
NC
C870
Figure 1. CX74016 Pin Configuration 鈥?72-Pin LGA
Data Sheet
Conexant 鈥?Preliminary
Proprietary Information
Doc. No. 100778A
July 25, 2000

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