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
0°
90°
90°/control
loop
Σ
3
RF
O
2,11,13,14
GND
4583D–CELL–07/06
ATMEL [ ATMEL CORPORATION ]
