U3770M Datasheet, PDF (1/5 Pages) TEMIC Semiconductors – CT2 I/Q Modulator and Clock Circuitry

CT2 I/Q Modulator and Clock Circuitry
U3770M
Description
U3770M is a quadrature modulator realized with
MATRA MHS’ advanced 0.8 micron CMOS process.
The IC is especially designed for CT2 application
in conjunction with TEMIC’s RF/IF signal processor
U2760B and a CT2 baseband controller
(i.e., AMD PhoX^TM controller Am79C4xx). Together
with TEMIC’s 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 to 3.3 V
D Low power consumption, typical 12 mW
D SO16 package or die form
Block Diagram
R_{Ref in} 12.8 MHz
2
VDD ³
DGND ⁴
AGND ¹³
PROG ¹²
TST ¹⁰
6
Q_in
5
QB_in
I_in ⁸
IB_in ⁷
1, 15, 16
DNC
Amp.
LF
11
DIV / 25
Phase
512 kHz ^comparator
VCO
95 9881
14 CLK out
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
MATRA MHS
1 (5)
Rev. A2, 03-Dec-97