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PDF MAS9081 Data sheet ( Hoja de datos )
| Número de pieza | MAS9081 | |
| Descripción | Stand-alone Dual Band Time Signal AM Receiver IC | |
| Fabricantes | Micro Analog Systems | |
| Logotipo |  |
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DA9081.006
1 August, 2005
MAS9081
• Dual 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 MAS9081 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. MAS9081 supports dual band operation
by switching between two crystal filters and an
additional antenna tuning capacitor.
MAS9081 has differential input and different internal
compensation capacitor options for compensating
shunt capacitances of different crystals (See ordering
information on page 12).
FEATURES
• Dual Band Receiver IC
• Highly Sensitive AM Receiver, 0.4 µVRMS 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
• Dual Band Time Signal Receiver WWVB (USA),
JJY (Japan), DCF77 (Germany), MSF (UK), HGB
(Switzerland) and BPC (China)
BLOCK DIAGRAM
RFIP
RFIM
QO2 QO1 QI
AGC Amplifier
AON
Demodulator
&
OUT
Comparator
RFI2
Power Supply/Biasing
VDD VSS PDN1 PDN2 AGC
DEC
1 (12)
1 page  
www.DataSheet4U.com
DA9081.006
1 August, 2005
TYPICAL APPLICATION
LANT
Ferrite
Antenna
CANT1
CANT2
RFIP
RFIM
Note 1
X2
X1
QO2 QO1
QI
AGC Amplifier
Optional
Control
for AGC on/hold
AON
Demodulator
&
OUT
Comparator
Receiver
Output
Power Supply/Biasing
RFI2
VDD VSS PDN1 PDN2
VBATTERY
AGC
DEC
+ CAGC
CDEC
Figure 1
Power Down /
Fast Startup /
Frequency Selection
Application circuit of dual band receiver MAS9081
X2
40.003kHz
Note 2
X1
60.003kHz
Optional
Control
for AGC on/hold
LANT
4.40 mH
Ferrite
Antenna
CANT1
1.5 nF
CANT2
2.0 nF
RFIP
RFIM
QO2 QO1
QI
AGC Amplifier
AON
Demodulator
&
OUT
Comparator
Receiver
Output
Figure 2
Power Supply/Biasing
RFI2
VDD VSS PDN1 PDN2
1.4 V
AGC
DEC
+ CAGC
10 µF
CDEC
47 nF
Power Down /
Fast Startup /
Frequency Selection
Example circuit of dual band receiver MAS9081 for MSF/WWVB/JJY frequencies
5 (12)
5 Page 
www.DataSheet4U.com
REEL SPECIFICATIONS
DA9081.006
1 August, 2005
AD
Tape Slot for Tape Start
B
W2
CN
W1
2000 Components on Each Reel
Reel Material: Conductive, Plastic Antistatic or Static Dissipative
Carrier Tape Material: Conductive
Cover Tape Material: Static Dissipative
Carrier Tape
Cover Tape
End Start
Trailer
Components
Dimension
A
B
C
D
N
W1
(measured at hub)
W2
(measured at hub)
Trailer
Leader
Weight
Min
1.5
12.80
20.2
50
12.4
160
390,
of which minimum 160
mm of empty carrier tape
sealed with cover tape
Leader
Max
330
13.50
14.4
18.4
1500
Unit
mm
mm
mm
mm
mm
mm
mm
mm
mm
g
11 (12)
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAS9081.PDF ] | |
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