器件名称: U2794B-MFSG3
功能描述: 1000 MHZ QUADRATURE DEMODULATOR
文件大小: 290.11KB 共15页
简 介:Features
Supply Voltage 5 V Very Low Power Consumption 125 mW Very Good Image Rejection By Means of Phase Control Loop for Precise 90° Phase
Shifting Duty-cycle Regeneration for Single-ended LO Input Signal Low LO Input Level -10 dBm LO Frequency from 70 MHz to 1 GHz Power-down Mode 25 dB Gain Control Very Low I/Q Output DC Offset Voltage Typically < 5 mV
Benefits
Low Current Consumption Easy to Implement Perfect Performance for Large Variety of Wireless Applications Electrostatic sensitive device. Observe precautions for handling.
1000-MHz Quadrature Demodulator U2794B
Description
The silicon monolithic integrated circuit U2794B is a quadrature demodulator manufactured using Atmel’s advanced UHF technology. This demodulator features a frequency range from 70 MHz to 1000 MHz, low current consumption, selectable gain, power-down mode and adjustment-free handling. The IC is suitable for direct conversion and image rejection applications in digital radio systems up to 1 GHz such as cellular radios, cordless telephones, cable TV and satellite TV systems.
Rev. 4653C–CELL–06/03
1
Figure 1. Block Diagram
VS
5,6
PU
14
IIX
4
II
3 1 2
IX OUTPUT I
Power down
RFin
7 8
90°Control loop
0° 90°
Frequency doubler
Duty cycle 15 LO regenerator 17 13 PC
12 19 20
PCX Q OUTPUT QX
11
16,18
10
9
GC
GND
QQX
QQ
Pin Configuration
Figure 2. Pinning SSO20
1 2 3 4 5 6 7 8 9 10 20 QX 19 18 17 16 15 Q GND LOin GND LOXin
IX I II IIX V S VS RFin RFXin QQ QQX
14 PU 13 ……
