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MAS9078 데이터시트 PDF




Micro Analog Systems에서 제조한 전자 부품 MAS9078은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 MAS9078 기능
기능 Stand-alone am Receiver ic
제조업체 Micro Analog Systems
로고 Micro Analog Systems 로고


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MAS9078 데이터시트, 핀배열, 회로
www.DataSheet4U.com
DA9078.002
17 April 2003
MAS9078
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 MAS9078 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,
MAS9078 does not require AGC control procedure in
WWVB and JJY systems.
FEATURES
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
Die and TSSOP-16 Package
APPLICATIONS
Time Signal Receiver WWVB (USA), JJY (Japan),
DCF77 (Germany) and MSF (UK)
Receiver for ASK Modulated Data Signals
BLOCK DIAGRAM
QO
QI
AON (=AGC on)
RFI AGC Amplifier
Demodulator
&
Comparator
OUT
Power Supply/Biasing
VDD VSS PDN
AGC DEC
1 (10)




MAS9078 pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
TYPICAL APPLICATION
Note 1
Ferrite-
Antenna
RFI
X1
QO
QI
AGC Amplifier
DA9078.002
17 April 2003
AON (=AGC on)
Demodulator
&
Comparator
OUT
Receiver
output
1.4 V
VDD
Power Supply/Biasing
VSS
PDN
AGC DEC
Note 3
Power Down /
Fast Startup
Control
Note 2
CAGC
10 uF
CDEM
47 nF
Note 1: Crystal
The crystal as well as ferrite antenna frequencies are chosen according to the time-signal system (Table 1). The
crystal shunt capacitance C0 should be matched as well as possible with the internal shunt capacitance
compensation capacitance CC. MAS9078 has five compensation capacitance options. Capacitance values and
suitable crystals are described in Table 2. See also Ordering Information (p.10).
Time-Signal System Location
Antenna Frequency
DCF77
MSF
WWVB
JJY
Table 1
Germany
77.5 kHz
United Kingdom
60 kHz
USA
60 kHz
Japan
40 kHz and 60 kHz
Time-Signal System Frequencies
Recommended Crystal Frequency
77.503 kHz
60.003 kHz
60.003 kHz
40.003 kHz and 60.003 kHz
Device
MAS9078B1
MAS9078B2
MAS9078B3
MAS9078B4
MAS9078B5
Table 2
CC Crystal Description
0.75 pF
1.25 pF
1.625 pF
For single low C0 crystal (Nominal value)
For single high C0 crystal
For two parallel low C0 crystals (dual band receiver)
2.5 pF
For two parallel high C0 crystals (dual band receiver)
3.875 pF Any crystal with parallel external compensation capacitor
Compensation Capacitance Options
Note 2: AGC Capacitor
The AGC and DEC capacitors must have low leakage currents due to very small 40 nA signal currents through
the capacitors. The insulation resistance of these capacitors should be higher than 70 M. Also probes with at
least 100 M==impedance should be used for voltage probing of AGC and DEC pins.
Note 3: Power Down / Fast Startup Control
Both power down and fast startup are controlled using the PDN pin. The device is in power down (turned off) if
PDN = VDD and in power up (turned on) if PDN = VSS. Fast startup is triggered by the falling edge of PDN
signal, i.e., controlling device from power down to power up. The startup time without using the fast startup
control can be several minutes but with fast startup it is shortened typically to 12 s.
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MAS9078 전자부품, 판매, 대치품
www.DataSheet4U.com
PACKAGE (TSSOP16) OUTLINES
C
DA9078.002
17 April 2003
B
A
Pin 1
D
Seating Plane
Detail A
E
F GH
O
B
B
I I1
L
K
Section B-B
J1
M
JN
Dimension
A
B
C
D
E
F
G
H
I
I1
J
J1
K
L
M
(The length of a terminal for
soldering to a substrate)
N
O
P
Min Max
6.40 BSC
4.30 4.50
5.00 BSC
0.05 0.15
1.10
0.19 0.30
0.65 BSC
0.18 0.28
0.09 0.20
0.09 0.16
0.19 0.30
0.19 0.25
0° 8°
0.24 0.26
0.50 0.75
1.00 REF
12°
12°
Dimensions do not include mold flash, protrusions, or gate burrs.
All dimensions are in accordance with JEDEC standard MO-153.
P
Detail A
Unit
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
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