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參數(shù)資料
| 型號： | CX74070 |
| 英文描述： | CX74070 Receiver for PCS and GPS|Handset RF ICs:CDMA / CDMA2000 |
| 中文描述： | CX74070接收機PCS和全球定位系統(tǒng)|手機射頻集成電路：碼分多址/ CDMA2000的 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大小： | 664K |
| 代理商： | CX74070 |
CX74001
Rx ASIC for CDMA, AMPS, and PCS Applications
4
Skyworks
101134A
Proprietary Information and Specifications are Subject to Change
March 5, 2002
Table 1. CX74001 Pin Assignments and Signal Descriptions (1 of 4)
Pin #
Name
Description
Equivalent Circuit
1
LNA_CTRL1
Digital signal used in conjunction with pin 3 to control LNA gain step. DO NOT ALLOW TO
FLOAT OR LEAVE UNCONNECTED
Vcc
2
PCS_LNAIN
PCS LNA input pin. High-Q matching network should be used to minimize noise figure, and a
DC blocking capacitor is required.
3
LNA_CTRL0
Digital signal used in conjunction with pin 1 to control LNA gain step. DO NOT ALLOW TO
FLOAT OR LEAVE UNCONNECTED
Vcc
4
CELL_LNA_IN
Cellular LNA input pin. High-Q matching network should be used to minimize noise figure, and
a DC blocking capacitor is required.
5
VCC_RF_BIAS
Supply voltage to the RF bias (needed by all LNA/Mixer blocks) . An RF bypass capacitor
should be connected from the pin to ground with minimal trace length.
6
CELL_LNA_EMIT
Ground directly to ground with minimum trace length.
7
CELL/PCS
Digital signal used for band selection: 0 = cellular (800 MHz), 1 = PCS (1900 MHz).
8
FM/CDMA
Digital signal used in cellular band for mode selection: 0 = AMPS, 1 = CDMA.
9
VCO_VCC
Voltage supply to the VCO buffers. A bypass capacitor should be placed close to the device
from pin 9 to ground with minimal trace length.
10
VCO_ON
VCO control signal to turn VCO and PLL buffer ON/OFF during slotted paging modes, thereby
increasing standby time.
11
CELL_TANK–
Differential tank cellular band VCO pin. Care should be taken during the layout of the external
tank circuit to prevent parasitic oscillations.
12
CELL_TANK+
Differential tank cellular band VCO pin. Care should be taken during the layout of the external
tank circuit to prevent parasitic oscillations.
13
PCS_TANK–
Differential tank PCS band VCO pin. Care should be taken during the layout of the external
tank circuit to prevent parasitic oscillations.
14
PCS_TANK+
Differential tank PCS band VCO pin. Care should be taken during the layout of the external
tank circuit to prevent parasitic oscillations.
–
+
15
LOD
Linearity On Demand. It provides the bias control for the mixers, thereby reducing the chip
current consumption at the expense of input IP3.
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