MAS9178 Datasheet, PDF (1/8 Pages) Micro Analog systems – AM Receiver IC

DA9178.001
10 Dec, 2003
MAS9178
AM 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 MAS9178 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 receiver.
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. Unlike MAS1016A and
MAS1016B, MAS9178 does not require AGC control
procedure in WWVB and JJY systems.
MAS9178A1 has differential input and internal 0.875
pF compensation capacitor for crystal shunt
capacitance compensation.
MAS9178A5 requires external compensation
capacitor for crystal shunt capacitance
compensation.
It can be used with crystals that do not match with
fixed 0.875 pF compensation capacitance of
MAS9178A1.
FEATURES
• Highly Sensitive AM Receiver, 0.4 µV_RMS typ.
• Wide Supply Voltage Range from 1.1 V to 3.6 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
• Time Signal Receiver WWVB (USA), JJY (Japan),
DCF77 (Germany) and MSF (UK)
• Receiver for ASK Modulated Data Signals
BLOCK DIAGRAM
RFP
RFM
QOP
QI QOM
AGC Amplifier
AON
Demodulator
&
OUT
Comparator
Power Supply/Biasing
VDD VSS PDN
AGC DEC
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