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PDF U3770M Data sheet ( Hoja de datos )

Número de pieza U3770M
Descripción CT2 I/Q Modulator and Clock Circuitry
Fabricantes ATMEL Corporation 
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CT2 I/Q Modulator and Clock Circuitry
U3770M
Description
The U3770M is a quadrature modulator realized using
Atmel Wireless & Microcontrollers’ advanced 0.8 mi-
cron CMOS process. The IC is especially designed for
CT2 applications in conjunction with Atmel Wireless &
Microcontrollers’ RF/IF signal processor U2760B and a
CT2 baseband controller (i.e., AMD PhoXTM controller
Am79C4xx). Together with Atmel Wireless &
Microcontrollers’ PLL IC U2783B and the GaAs front
end U7001BG, a complete CT2 chip set is available.
Electrostatic sensitive device.
Observe precautions for handling.
Features
D Programmable 0.8/1.6-MHz quadrature-modulated
carrier generation
D More than 26 dB LO and sideband suppression
D 18.432 MHz CMOS level clock generation
D Supply-voltage range 2.7 V to 3.3 V
D Low power consumption, typically 12 mW
D SO16 package or die form
Block Diagram
RRef in 12.8 MHz
2
DIV / 25
Phase
512 kHz comparator
LF
11
VCO
95 9881
14 CLK out
VDD
DGND
AGND
PROG
TST
Qin
QBin
Iin
IBin
3
4
13
12
10
6
5
8
7
1, 15, 16
DNC
Amp.
Ordering Information
Extended Type Number
U3770M-MFP
U3770M-MFPG3
512 kHz DIV / 36 18.432 MHz
DIV / 2
or
DIV / 4
6.4 MHz
Dual DFF
3.2 MHz
9 MOD out
Figure 1. Block diagram
Package
SO16
SO16
Remarks
Tube
Taped and reeled
Rev. A3, 07-Sep-00
1 (6)

1 page




U3770M pdf
Test Circuit
R Ref in
12.8 MHz
2
VDD
DGND
AGND
PROG
TST
3
4
13
12
10
Amp
U3770M
4.7 nF
47 nF
DIV / 25
Phase
512 kHz comparator
LF 22 W
11
VCO
95 9967
14
CLK out
DIV / 36
512 kHz
18.432 MHz
DIV / 2
or
DIV / 4
6.4 MHz
Dual DFF
3.2 MHz
9
MOD out
6
Q in
5
QB in
8
I in
7
IB in
1 kW
1 nF
1 kW
1 nF
1 kW
1 nF
1 kW
1 nF
Figure 3. Test circuit
Rev. A3, 07-Sep-00
5 (6)

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