MAS9179 Datasheet, PDF (1/9 Pages) Micro Analog systems – AM Receiver IC

DA9179.002
19 May, 2005
MAS9179
AM Receiver IC
• Tri Band Receiver IC
• High Sensitivity
• Very Low Power Consumption
• Wide Supply Voltage Range
• Power Down Control
• Control for AGC On
• High Selectivity by Crystal Filter
• Fast Startup Feature
DESCRIPTION
The MAS9179 AM-Receiver chip is a highly
sensitive, simple to use AM receiver specially
intended to receive time signals in the frequency
range from 40 kHz to 100 kHz. Only a few external
components are required for time signal receiving.
The circuit has preamplifier, wide range automatic
gain control, demodulator and output comparator
built in. The output signal can be processed directly
by an additional digital circuitry to extract the data
from the received signal. The control for AGC
(automatic gain control) can be used to switch AGC
on or off if necessary. MAS9179 supports tri band
operation by switching between three crystal filters
and two additional antenna tuning capacitors.
MAS9179 has differential input and different internal
compensation capacitor options for compensating
shunt capacitances of different crystals (See ordering
information on page 9).
FEATURES
• Tri Band Receiver IC
• Highly Sensitive AM Receiver, 0.4 µV_RMS typ.
• Wide Supply Voltage Range from 1.1 V to 5 V
• Very Low Power Consumption
• Power Down Control
• Fast Startup
• Only a Few External Components Necessary
• Control for AGC On
• Wide Frequency Range from 40 kHz to 100 kHz
• High Selectivity by Quartz Crystal Filter
APPLICATIONS
• Multi Band Time Signal Receiver WWVB (USA),
JJY (Japan), DCF77 (Germany), MSF (UK), HGB
(Switzerland) and BPC (China)
BLOCK DIAGRAM
RFIP
RFIM
QO3 QO2 QO1 QI
AGC Amplifier
AON
Demodulator
&
OUT
Comparator
RFI2
RFI3
Power Supply/Biasing
VDD VSS PDN1 PDN2 AGC
DEC
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