MAS MAS9178A1TB00.01 Am receiver ic Datasheet

DA9178.001
10 Dec, 2003
MAS9178
AM Receiver IC
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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.
FEATURES
APPLICATIONS
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•
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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.
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
•
•
Time Signal Receiver WWVB (USA), JJY (Japan),
DCF77 (Germany) and MSF (UK)
Receiver for ASK Modulated Data Signals
BLOCK DIAGRAM
QOP
QI
AON
QOM
RFP
AGC Amplifier
RFM
Demodulator
&
Comparator
OUT
Power Supply/Biasing
VDD
VSS
PDN
AGC
DEC
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DA9178.001
10 Dec, 2003
PAD LAYOUT
1906 µm
VSS RFM RFP PDN AON DEC
9178
A1
1778 µm
VDD QOP QI QOM AGC OUT
DIE size = 1.91 x 1.78 mm; PAD size = 100 x 100 µm except for VSS PAD size 104 x 112 µm
Note: Because the substrate of the die is internally connected to VDD, the die has to be connected to VDD or
left floating. Please make sure that VDD is the first pad to be bonded. Pick-and-place and all component
assembly are recommended to be performed in ESD protected area.
Note: Coordinates are pad center points where origin has been located in the center of VDD pad
Pad Identification
Name
X-coordinate
Y-coordinate
Power Supply Voltage
Quartz Filter Output for Crystal
Quartz Filter Input for Crystal and
External Compensation Capacitor
Quartz Filter Output for External
Compensation Capacitor
AGC Capacitor
Receiver Output
Demodulator Capacitor
AGC On Control
Power Down Input
Positive Receiver Input
Negative Receiver Input
Power Supply Ground
VDD
QOP
QI
0 µm
306 µm
549 µm
0 µm
19 µm
19 µm
QOM
866 µm
19 µm
AGC
OUT
DEC
AON
PDN
RFP
RFM
VSS
1146 µm
1389 µm
1389 µm
1146 µm
829 µm
586 µm
269 µm
16 µm
19 µm
19 µm
1428 µm
1428 µm
1428 µm
1428 µm
1428 µm
1407 µm
Note
1
2
3
Notes:
1) OUT = VSS when carrier amplitude at maximum; OUT = VDD when carrier amplitude is reduced
(modulated)
- the output is a current source/sink with |IOUT| > 5 µA
- at power down the output is pulled to VSS (pull down switch)
2) AON = VSS means AGC off (hold current gain level); AON = VDD means AGC on (working)
- Internal pull-up with current < 1 µA which is switched off at power down
3) PDN = VSS means receiver on; PDN = VDD means receiver off
- Fast start-up is triggered when the receiver is after power down (PDN=VDD) controlled to power up
(PDN=VSS) i.e. at the falling edge of PDN signal.
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DA9178.001
10 Dec, 2003
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Supply Voltage
Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
VDD-VSS
VIN
PMAX
TOP
TST
Conditions
Min
Max
Unit
-0.3
VSS-0.3
5.0
VDD+0.3
100
70
120
V
V
mW
o
C
o
C
-20
-40
ELECTRICAL CHARACTERISTICS
Operating Conditions: VDD = 1.4V, Temperature = 25°C
Parameter
Operating Voltage
Current Consumption
Stand-By Current
Input Frequency Range
Minimum Input Voltage
Maximum Input Voltage
Input Levels |lIN|<0.5 µA
Output Current
VOL<0.2 VDD;VOH >0.8 VDD
Output Pulse
Symbol
VDD
IDD
Conditions
VDD=3.6 V, Vin=0 µV
VDD=1.4 V, Vin=0 µV
IDDoff
fIN
VIN min
VIN max
VIL
VIH
|IOUT|
T100ms
T200ms
T500ms
T800ms
Startup Time
TStart
Output Delay Time
TDelay
Min
1.10
56
Typ
76
66
40
0.4
Max
Unit
3.60
95
µA
0.1
100
1
20
0.2 VDD
0.8 VDD
5
1 µVrms ≤ VIN ≤
20 mVrms
1 µVrms ≤ VIN ≤
20 mVrms
1 µVrms ≤ VIN ≤
20 mVrms
1 µVrms ≤ VIN ≤
20 mVrms
Fast Start-up
Without Fast Start-up
V
µA
kHz
µVrms
mVrms
V
µA
50
140
ms
150
230
ms
400
500
600
ms
700
800
900
ms
100
s
min
ms
12
3
50
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DA9178.001
10 Dec, 2003
TYPICAL APPLICATION
Note 4
Optional
Control
for AGC on/hold
Note 1
QOP
QI
RFP
Ferrite
Antenna
AON
QOM
Demodulator
&
Comparator
AGC Amplifier
RFM
OUT
Receiver
Output
Power Supply/Biasing
VDD
VSS
AGC
PDN
CAGC +
10 µF
1.4 V
Figure 1
CDEC
47 nF
Note 2
Note 3
Power Down /
Fast Startup
Control
Application circuit of internal compensation capacitance version MAS9178A1.
Note 1
QOP
CC_EXT=C0
QI
Note 4
Optional
Control
for AGC on/hold
AON
QOM
RFP
Ferrite
Antenna
DEC
AGC Amplifier
RFM
Demodulator
&
Comparator
OUT
Receiver
Output
Power Supply/Biasing
VDD
1.4 V
Figure 2
VSS
PDN
AGC
CAGC +
10 µF
DEC
CDEC
47 nF
Note 3
Note 2
Power Down /
Fast Startup
Control
Application circuit of external compensation capacitance version MAS9178A5.
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DA9178.001
10 Dec, 2003
TYPICAL APPLICATION (Continued)
Note 1
QOP
Note 4
Optional
Control
for AGC on/hold
QI
AON
QOM
RFP
Ferrite
Antenna
AGC Amplifier
RFM
Antenna
Frequency
Selection
OUT
Receiver
Output
Power Supply/Biasing
VDD
VSS
PDN
AGC
CAGC +
10 µF
1.4 V
Figure 3
Demodulator
&
Comparator
DEC
CDEC
47 nF
Note 3
Note 2
Power Down /
Fast Startup
Control
Dual band application circuit of external compensation capacitance version MAS9178A5.
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 capacitor CC=0.875 pF of MAS9178A1. External compensation pad QOM is unconnected in
MAS9178A1. MAS9178A5 does not have internal compensation capacitance CC and it requires use of external
compensation capacitor CC_EXT. It must be connected between pins QOM and QI (see figure 2). CC_EXT should
have equal value with crystal’s effective shunt capacitance C0. External compensation version MAS9178A5
should be used when fixed 0.875 pF compensation capacitance of MAS9178A1 does not match well with used
crystal’s shunt capacitance.
It should be noted that grounded crystal package has reduced shunt capacitance. This value is about 85% of
floating crystal shunt capacitance. PCB traces of crystal and external compensation capacitance should be kept
at minimum to minimize additional parasitic capacitance which can cause capacitance mismatching.
In dual band receiver configuration the crystals can be connected in parallel thus external compensation
capacitor value CC_EXT must be sum of two crystals’ shunt capacitances. Instead of parallel crystal connection it
is also possible to connect other crystal from QOP pin and the other crystal from QOM pin to common QI pin
(figure 3). In this circuit configuration no external compensation capacitor is required since the crystals
compensate each other. The sensitivity of dual band receiver configuration will be lower than that of single band
receiver configuration since the noise band width of crystal filter with two parallel crystals is double.
Time-Signal System
DCF77
MSF
WWVB
JJY
Table 1
Location
Antenna Frequency
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
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DA9178.001
10 Dec, 2003
TYPICAL APPLICATION (Continued)
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 MΩ. Also probes with at
least 100 MΩ impedance should be used for voltage probing of AGC and DEC pins. Electrolyte capacitors
cannot be used due to their large leakage current. Instead low leakage tantalum capacitor can be used as AGC
capacitor. DEC capacitor can be low leakage chip capacitor.
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.
Note 4: Optional Control for AGC On/Hold
AON control pin has internal pull up which turns AGC circuit on all the time if AON pin is left unconnected.
Optionally AON control can be used to hold and release AGC circuit. Stepper motor drive etc. can produce
disturbing amount of noise which can shift the input amplifier gain to unoptimal level. This can be avoided by
controlling AGC hold (AON=VSS) during stepper motor drive periods and releasing AGC (AON=VDD) when
motors are not driven.
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DA9178.001
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SAMPLES IN SBDIL 20 PACKAGE
VDD 1
20 VSS
NC 2
19 NC
18 RFM
QOP 3
NC 6
QOM 7
NC 8
17 RFP
9178Ax
YYWW
XXXXX.X
NC 4
QI 5
16 NC
15 PDN
14 AON
13 DEC
AGC 9
12 NC
11 OUT
NC 10
Top Marking Definitions:
YYWW = Year Week
XXXXX.X = Lot Number
x =1, 5 Sample Version Number
PIN DESCRIPTION
Pin Name
Pin
Type
VDD
NC
QOP
NC
QI
1
2
3
4
5
P
NC
QOM
6
7
NC
AGC
NC
OUT
NC
DEC
AON
PDN
NC
RFP
RFM
NC
VSS
8
9
10
11
12
13
14
15
16
17
18
19
20
Function
Note
Positive Power Supply
AO
Quartz Filter Output for Crystal
AI
Quartz Filter Input for Crystal and
External Compensation Capacitor
AO
Quartz Filter Output for External
Compensation Capacitor
AO
AGC Capacitor
DO
Receiver Output
2
AO
DI
AI
Demodulator Capacitor
AGC On Control
Power Down Input
3
4
AI
AI
Positive Receiver Input
Negative Receiver Input
1
1
G
Power Supply Ground
Notes:
1) Pins 4 and 6 around quartz crystal filter input pins must be connected to VSS to eliminate DIL 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.
2) OUT = VSS when carrier amplitude at maximum; OUT = VDD when carrier amplitude is reduced
(modulated)
- the output is a current source/sink with |IOUT| > 5 µA
- at power down the output is pulled to VSS (pull down switch)
3) AON = VSS means AGC off (hold current gain level); AON = VDD means AGC on (working)
- Internal pull-up with current < 1 µA which is switched off at power down
4) PDN = VSS means receiver on; PDN = VDD means receiver off
- Fast start-up is triggered when the receiver is after power down (PDN=VDD) controlled to power up
(PDN=VSS) i.e. at the falling edge of PDN signal.
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DA9178.001
10 Dec, 2003
SAMPLE INFORMATION
Product Code
Product
Description
Capacitance Option
MAS9178A1TB00.01
AM-Receiver IC with
Differential Input
AM-Receiver IC with
Differential Input
EWS-tested wafer,
Thickness 480 µm.
EWS-tested wafer,
Thickness 480 µm.
CC = 0.875 pF
AM-Receiver IC with
Differential Input
AM-Receiver IC with
Differential Input
EWS-tested wafer,
Thickness 400 µm.
EWS-tested wafer,
Thickness 400 µm.
MAS9178A5TB00.01
MAS9178A1TC00.01
MAS9178A5TC00.01
External
Compensation
Capacitor
CC = 0.875 pF
External
Compensation
Capacitor
LOCAL DISTRIBUTOR
MICRO ANALOG SYSTEMS OY CONTACTS
Micro Analog Systems Oy
Kamreerintie 2, P.O. Box 51
FIN-02771 Espoo, FINLAND
Tel. +358 9 80 521
Fax +358 9 805 3213
http://www.mas-oy.com
NOTICE
Micro Analog Systems Oy reserves the right to make changes to the products contained in this data sheet in order to improve the design or
performance and to supply the best possible products. Micro Analog Systems Oy assumes no responsibility for the use of any circuits shown
in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes no claim that
the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Micro Analog
Systems Oy makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
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