- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373261 > RF137 Transceiver For GSM Applications PDF資料下載
參數(shù)資料
| 型號： | RF137 |
| 英文描述： | Transceiver For GSM Applications |
| 中文描述： | 收發(fā)器的GSM應(yīng)用 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大小： | 114K |
| 代理商： | RF137 |
Data Sheet
Conexant - Proprietary
Data Subject to Change
Doc. No. 100777C
October 11, 2000
RF137
Transceiver For GSM Applications
The RF137 Transceiver is a highly integrated device optimzed for use in single-
band or multi-band Global Systemfor Mobile Communications (GSM) applications.
In the receive path, the device consists of selectable gain Intermediate Frequency
(IF) amplifiers and an image reject downconverter with differential IF outputs.
In the transmt path, the device consists of an In-Phase and Quadrature (I/Q)
modulator and a frequency translational loop designed to performfrequency up-
conversion with high output spectral purity. This loop has a phase/frequency
detector, a charge-pump, a mxer, and buffers for the required isolation between
RF output, Local Oscillator (LO), and IF inputs.
In addition, the RF137 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, and control circuits.
The device package and pinout of the RF137 are shown in Figure 1. A block
diagramis shown in Figure 2.
The signal pin assignments and functional pin descriptions are found in Table 1.
The absolute maximumratings of the device are provided in Table 2, and the
operating conditions and electrical specifications are provided in Table 3.
Features
Image-reject mxer for downconversion to 2nd IF
24 dB selectable attenuation on 1st IF amplifier
12 dB selectable attenuation on 2nd IF amplifier
Integrated transmt path with high phase accuracy
Reduced filtering requirements for the transmt path
Wide RF and IF range for multi-band operation
Integrated, fully programmable dual loop
synthesizer
Integrated local oscillator phase shifters
On-chip second local oscillator
Low supply voltage down to 2.7 V
Separate enable lines for transmt, receive, and
synthesizer modes for power management
48-pin Thin Quad Flat Pack (TQFP) (7mmx 7mm
package
Applications
GSM900/DCS1800/PCS1900 digital cellular
telephony
100777C-1_100500
GND
VCC
TLCPO
VCCB
GND
GND
TXIFIN+
TXIFIN-
TXI+
TXQ-
TXI-
TXQ+
1
2
3
4
5
6
7
8
9
10
11
12
T
C
T
L
D
G
V
U
F
V
G
V
1
1
1
1
1
1
2
2
2
2
1
2
T
V
T
T
G
I
L
L
I
S
R
R
4
4
4
4
4
4
4
4
3
3
4
3
RES1
VCC
RES2
IF2IN+
IF2IN-
IF2O+
BPC
GND
VCC
GND
LD
IF2O-
36
35
34
33
32
31
30
29
28
27
26
25
Figure 1. RF137 Pinout – 48-Pin TQFP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RF1B | Fast-Recovery Rectifier Diodes (600 to 1000V) |
| RF1K4909396 | TRANSISTOR | MOSFET | MATCHED PAIR | P-CHANNEL | 12V V(BR)DSS | 2.5A I(D) | SO |
| RF1K4915696 | TRANSISTOR | MOSFET | N-CHANNEL | 30V V(BR)DSS | 6.3A I(D) | SO |
| RF1K4915796 | TRANSISTOR | MOSFET | N-CHANNEL | 30V V(BR)DSS | 6.3A I(D) | SO |
| RF1K4922196 | TRANSISTOR | MOSFET | MATCHED PAIR | N-CHANNEL | 60V V(BR)DSS | 2.5A I(D) | SO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RF137-12 | 制造商:Conexant Systems Inc 功能描述:137-12 |
| RF1377-000 | 制造商:TE Connectivity 功能描述:- Bag 制造商:TE Connectivity 功能描述:POLYSWITCH PTC RESET 0.145A HOLD 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:Tline / TRF250-145ST-B-0.5 |
| RF1378-000 | 制造商:TE Connectivity 功能描述:- Tape and Reel 制造商:TE Connectivity 功能描述:POLYSWITCH RESET FUSE 1.85A SMD 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:SMD / ASMD185F-2 |
| RF1381-000 | 制造商:TE Connectivity 功能描述:- Trays 制造商:TE Connectivity 功能描述:GAS TUBE 5MM 230V 20% SMD 5KA 制造商:TE Connectivity 功能描述:GAS TUBE 5MM 90V 20% SMD 5KA 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:GDT / GTCS35-231M-R05 |
| RF1382-000 | 制造商:TE Connectivity 功能描述:- Trays 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:Gas Discharge Tubes 90VDC 5KADC 5AAC 1.2pF Solder Pad SMD |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。