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U2790B

Description
1000-mhz quadrature modulator
CategoryPassive components   
File Size257KB,16 Pages
ManufacturerAtmel (Microchip)
Download Datasheet Compare View All

U2790B Overview

1000-mhz quadrature modulator

Features
Supply Voltage 5V (Typically)
Very Low Power Consumption: 150 mW (Typically) for –1 dBm Output Level
Very Good Sideband Suppression by Means of Duty Cycle Regeneration of the LO
Input Signal
Phase Control Loop for Precise 90° Phase Shifting
Power-down Mode
Low LO Input Level: –10 dBm (Typically)
50-Ω Single-ended LO and RF Port
LO Frequency from 100 MHz to 1 GHz
SO16 Package
Benefits
No External Components Required for Phase Shifting
Adjustment Free, Hence Saves Manufacturing Time
Only Three External Components Necessary, this Results in Cost and Board Space
Saving
1000-MHz
Quadrature
Modulator
U2790B
Electrostatic sensitive device.
Observe precautions for handling.
1. Description
The U2790B is a 1000-MHz quadrature modulator using Atmel
®
’s advanced UHF pro-
cess. It features a frequency range from 100 MHz up to 1000 MHz, low current
consumption, and single-ended RF and LO ports. Adjustment-free application makes
the direct converter suitable for all digital radio systems up to 1000 MHz, e.g., GSM,
ADC, JDC.
Figure 1-1.
Block Diagram
S
PU
BB
AI
BB
AI
8
7
6
Power
up
PU
1
V
S
5,4
LO
i
Ph
adj
BB
Bi
BB
BI
12
15
16
9
10
Duty cycle
regenerator
Frequency
doubler
90°
90°/control
loop
Σ
3
RF
O
2,11,13,14
GND
4583D–CELL–07/06

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