音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

RF25A Datasheet

  • RF25A

  • RF25A for CDMA. and AMPS Applications

  • 17頁(yè)

  • ETC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

RF25A
RF25A for CDMA, and AMPS Applications
The RF25A device includes the following functional blocks:
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Low Noise Amplifier (LNA)
RF Downconverted Mixer
Intermediate Frequency (IF) Variable Gain Amplifier (VGA)
In-Phase and Quadrature (I/Q) Demodulator
Voltage Controlled Oscillator (VCO)
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Dual-Mode Operation
Battery operation 2.7 to 3.6 V
High level of integration
Differential I/Q outputs for baseband interfaces
On-chip 100 to 600 MHz VCO
Low DC consumption: < 60 mA
40-pin Land Grid Array (LGA) 6 x 6 mm package
The RF25A Application-Specific Integrated Circuit (ASIC) is a dual-mode, single-
band receiver (Rx) intended for use in Code Division Multiple Access (CDMA)
portable phones in the cellular band. It can be used in CDMA mode or Advanced
Mobile Phone System (AMPS) mode. The ASIC provides excellent RF
performance with low DC power dissipation and is assembled in a low cost, high
performance, 40-pin Land Grid Array (LGA) 6 x 6 mm package.
The device incorporates all the components required to implement the complete
dual-mode receiver front end; from the Low Noise Amplifier (LNA) to the In-Phase
and Quadrature (I/Q) demodulator stages, except for external SAW filters. The LNA
amplifies the incoming signal and outputs to an external SAW filter. After filtering,
the signal goes to the mixer for downconversion. The mixer output for the AMPS
mode is single-ended, followed by the external AMPS Intermediate Frequency (IF)
Surface Acoustic Wave (SAW) filter. The mixer output for the CDMA mode mixer
has balanced outputs for external IF SAW filtering. The IF SAW filters are followed
by a Variable Gain Amplifier (VGA) and and I/Q demodulator. The mode selection
is controlled by a mode control pin.
The IF filter outputs are buffered at the input of the VGA, which has a dynamic
range greater than 90 dB.
The on-chip Very High Frequency (VHF) Voltage Controlled Oscillators (VCO)
operates with an external tank circuit to provide the Local Oscillator (LO) signal for
the I/Q demodulator.
The Gain, Noise Figure (NF), and third order Input Intercept (IIP3) of each stage in
the receiver chip are optimized to meet the system requirements for AMPS and
CDMA modes according to the TIA/EIA 98-B standard. Employing silicon bipolar
technology, the ASIC is designed for high performance with a high level of
integration and provides a cost-effective RF solution for dual-mode phone
applications
The RF25A pin-out is shown in Figure 1, a functional block diagram is illustrated in
Figure 2, and a schematic diagram in Figure 3.
Applications
鈥?/div>
CDMA and AMPS handset in the cellular band:
鈭?/div>
AMPS
鈭?/div>
CDMA (US)
鈭?/div>
CDMA (Japan)
LNA_OUT
VCC_MIX
IF_TRAP
MIXEMIT
MIX_IN
40
39
38
37
36
35
34
33
32
LO_IN
31
30
29
28
27
26
25
24
23
22
21
NC
NC
NC
LNA_DECOUPLE
NC
LNA_IN
VCC_RFBIAS
BIAS_SET
FM/CDMA
VCC_VCO
GND
TANK-
TANK+
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NC
NC
AMPS_MIXEROUT
CDMA_MIXEROUT-
CDMA_MIXEROUT+
MIX_BYPASS
VGA_AMPS_IN
VGA_CDMA_IN-
VGA_CDMA_IN+
VCC_IF
VGA_CONTROL
PLL+
PLL-
Q+
Q-
I+
I-
DIV2/DIV4
SLEEP
NC
C506
Figure 1. RF25A Rx ASIC Pin-out
40-Pin LGA Package
Data Sheet
Conexant 鈥?Preliminary
Proprietary Information
Doc. No. 101110A
August 4, 2000

RF25A相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    Quadrature Demodulator
    ETC
  • 英文版
    RF Modulator
    ETC
  • 英文版
    RF25A for CDMA. and AMPS Applications
    ETC
  • 英文版
    Analog IC
    ETC
  • 英文版
    Voltage-Controlled Oscillator
    ETC
  • 英文版
    Voltage-Controlled Oscillator
    ETC
  • 英文版
    VCO/HIGH-ISOLATION BUFFER AMPLIFIER
    RFMD
  • 英文版
    VCO/HIGH-ISOLATION BUFFER AMPLIFIER
    RFMD [RF M...
  • 英文版
    VHF/UHF VCO/HIGH-ISOLATION BUFFER AMPLIFIER
    RFMD
  • 英文版
    VHF/UHF VCO/HIGH-ISOLATION BUFFER AMPLIFIER
    RFMD [RF M...
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD [RF M...
  • 英文版
    UHF TRANSMITTER
    RFMD
  • 英文版
    UHF TRANSMITTER
    RFMD [RF M...
  • 英文版
    UHF TRANSMITTER
    RFMD
  • 英文版
    UHF TRANSMITTER
    RFMD [RF M...
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD [RF M...
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD
  • 英文版
    VHF/UHF TRANSMITTER
    RFMD [RF M...

您可能感興趣的PDF文件資料

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！