DA1017.002
29 May, 2002
MAS1017
AM Receiver IC
•
High Sensitivity
•
Very Low Power Consumption
•
Wide Supply Voltage Range
•
Power Down and Power Up Control
•
High Selectivity by Crystal Filter
DESCRIPTION
The MAS1017 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. There are only a few
external components needed. The circuit has a
preamplifier, wide range automatic gain control,
demodulator and output comparator built in. The
output signal can be processed directly with an
additional digital circuitry to extract the data from the
received signal.
FEATURES
•
•
•
•
•
•
•
Highly Sensitive AM Receiver
Wide Supply Voltage Range
Very Low Power Consumption
Power Down and Power Up Control
Only a Few External Components Needed
Wide Frequency Range from 40 kHz to 100 kHz
High Selectivity by Quartz Crystal Filter
APPLICATIONS
•
Time Signal Receiver for DCF77 (Germany)
BLOCK DIAGRAM
QO
QI
RFI
AGC Amplifier
Demodulator
&
Comparator
DCF
Power Supply/Biasing
VDD
VSS
PDN
PUP
AGC
DEC
1(6)
DA1017.002
29 May, 2002
PAD LAYOUT
1588 µm
VSS RFI PDN QO
MAS1017
QI
2094 µm
VDD DEC AGC
PUP
DCF
DIE size = 2.09 x 1.59 mm; PAD size = 100 x 100
µm
Substrate is connected to VDD. Please make sure that VDD is bonded first.
Note: Coordinates are calculated using VDD as a centre point.
Pad Identification
Power Supply Voltage
Demodulator Capacitor
AGC Capacitor
Power Up Input
DCF Signal Output
Quarz Filter Input
Quarz Filter Output
Power Down Input
Receiver Input
Power Supply Ground
Name
VDD
DEC
AGC
PUP
DCF
QI
QO
PDN
RFI
VSS
X-coordinate
0
µm
244
µm
520
µm
759
µm
1075
µm
1038
µm
760
µm
483
µm
243
µm
-15
µm
Y-coordinate
0
µm
8
µm
8
µm
8
µm
8
µm
1625
µm
1625
µm
1625
µm
1625
µm
1605
µm
Note
1
2
3
Notes:
1) See power down control table below.
-
Internal pull-down resistor > 1 MΩ to VSS
2) DCF = VSS when carrier amplitude at maximum; DCF = VDD when carrier amplitude is reduced (25%
modulated)
-
the output is a current source/sink with |I
OUT
| > 5
µA
-
at power down the output is high impedance
3) See power down control logic table below.
- Internal pull-up resistor > 1MΩ to VDD
PDN
VSS
VSS
VDD
VDD
PUP
VSS
VDD
VSS
VDD
Power Down
NO
NO
YES (In power down if both PDN and PUP are left unconnected)
NO
2(6)
DA1017.002
29 May, 2002
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
DD
-V
SS
V
IN
P
MAX
T
OP
T
ST
Conditions
Min
-0.3
V
SS
-0.3
-20
-40
Max
5.0
V
DD
+0.3
100
70
120
Unit
V
V
mW
o
C
o
C
ELECTRICAL CHARACTERISTICS
Operating Conditions: VDD = 1.4V, Temperature = 25°C
Parameter
Operating Voltage
Current Consumption
Stand-By Current
Input Range
Sensitivity
Input Levels |l
IN
|<0.5
µA
Output Current
V
OL
<0.2 V
DD
;V
OH
>0.8 V
DD
Output Pulse
Startup Time
Output Delay Time
Symbol
V
DD
I
DD
I
DDoff
f
IN
V
IN
V
IL
V
IH
|I
OUT
|
T
0
T
1
T
Start
T
Delay
Conditions
Min
1.10
Typ
40
Max
3.60
100
0.1
100
20
0.3
Unit
V
µA
µA
kHz
mVrms
V
µA
40
0.001
V
DD
– 0.3
5
50
150
8
50
140
230
ms
ms
s
ms
3(6)
DA1017.002
29 May, 2002
TYPICAL APPLICATION
77503 Hz
QO
Ferrite-
An tenna
RFI
AG C Am plifier
QI
Dem odulator
&
Com parator
DCF
Receiver
output
Pow er Supply/Biasing
VDD
VSS
PDN
AG C
470 nF
DEC
47 nF
PUP
+1.1V to +3.6V
Note 1: Ferrite Antenna and Crystal
The crystal as well as ferrite antenna frequencies are chosen according to the time signal system frequency.
DCF-77 transmitter frequency is 77.5 kHz. The ferrite antenna center frequency has to be tuned to 77.5 kHz.
The optimal crystal frequency is 77503 Hz but also 77500 Hz crystal can be used. The shunt capacitance of the
crystal should be as close as possible to internal shunt capacitance compensation capacitor of 0.75 pF for
optimal noise filtering.
Note 2: AGC and DEC Capacitors
The AGC and DEC capacitors should 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 MΩ. Also probes
with at least 100 MΩ impedance should be used for voltage probing of AGC and DEC pins.
4(6)
DA1017.002
29 May, 2002
SAMPLES IN SBDIL 20 PACKAGE
NC
1
20 VSS
19 NC
18 RFI
17 PDN
16 NC
15 QO
14 NC
13 QI
12 NC
11 NC
VDD 2
NC
3
DEC 4
AGC
NC
5
6
PUP 7
DCF 8
NC
NC
9
10
PIN DESCRIPTION
Pin Name
NC
VDD
NC
DEC
AGC
NC
PUP
DCF
NC
NC
NC
NC
QI
NC
QO
NC
PDN
RFI
NC
VSS
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Type
P
AO
AO
AI
DO
Function
Positive power supply
Demodulator capacitor
AGC capacitor
Power up input
Demodulator output
1
2
Note
AI
AO
AI
AI
G
Quartz filter input
3
Quartz filter output
Power down input
Receiver input
Power supply ground
4
Notes:
1) See power down control table on page 2.
-
Internal pull-down resistor > 1 MΩ to VSS
2) DCF = VSS when carrier amplitude at maximum; DCF = VDD when carrier amplitude is reduced (25%
modulated)
-
the output is a current source/sink with |I
OUT
| > 5
µA
-
at power down the output is high impedance
3) Pin 14 between quartz crystal filter pins must be connected to VSS to eliminate package leadframe parasitic
capacitances disturbing the crystal filter performance. All other NC (Not Connected) pins are also
recommended to be connected to VSS to minimize noise coupling.
4) See power down control logic table on page 2.
- Internal pull-up resistor > 1MΩ to VDD
5(6)
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