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PDF MAS6179 Data sheet ( Hoja de datos )
| Número de pieza | MAS6179 | |
| Descripción | AM Receiver IC | |
| Fabricantes | Micro Analog systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAS6179 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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www.DataSheet4U.com
DA6179.000
22 January, 2007
This is preliminary information on a new
product under development. Micro Analog
Systems Oy reserves the right to make any
changes without notice.
MAS6179
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 MAS6179 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. MAS6179 supports up to three frequency
band operation by switching between three crystal
filters and two additional antenna tuning capacitors.
MAS6179 has differential input and two internal
compensation capacitor options for compensating
shunt capacitances of different crystals (See ordering
information on page 10).
FEATURES
• Tri Band Receiver IC
• Highly Sensitive AM Receiver, 0.4 µVRMS 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
• Differential Input
APPLICATIONS
• Multi Band Time Signal Receiver WWVB (USA),
JJY (Japan), DCF77 (Germany), MSF (UK), HBG
(Switzerland) and BPC (China)
BLOCK DIAGRAM
VDD
QO3 QO2 QO1
QI
RFIP VDD
RFIM
AGC Amplifier
AON
Demodulator
&
OUT
Comparator
RFI2
RFI3
Power Supply/Biasing
VDD VSS PDN1 PDN2 AGC
DEC
1 (10)
1 page  
ANTENNA TUNING CONSIDERATIONS
The ferrite bar antenna having inductance LANT and
parasitic coil capacitance CCOIL is tuned to three
reception frequencies f1, f2 and f3 by parallel
capacitors CANT1, CANT2 and CANT3. The receiver
input stage and internal antenna capacitor switches
have capacitances CRFI, COFF2, COFF3 which affect
Frequency f1 (highest frequency):
CTOT1=CCOIL+CANT1+CRFI+COFF2+COFF3
1
f1 =
2π L ANT ⋅ CTOT1
Frequency f2 (middle frequency):
CTOT2=CCOIL+CANT1+CANT2+CRFI+COFF3
1
f2 =
2π LANT ⋅ CTOT 2
Frequency f3 (lowest frequency):
CTOT3=CCOIL+CANT1+ CANT2+ CANT3+CRFI
1
f3 =
2π LANT ⋅ CTOT 3
DA6179.000
22 January, 2007
the resonance frequencies. COFF2 and COFF3 are
switch capacitances when switches are open. When
switches are closed these capacitances are shorted
by on resistance of the switches and they are
effectively eliminated. Following relationships can
be written for the three tuning frequencies.
5 (10)
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAS6179.PDF ] | |
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