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Preliminary Data Sheet
CME6005
RC Receiver IC
C-MAX
RF Technology Specialist
CME6005
Single and dual band receiver IC
1 Short Description The CME6005 is a BiCMOS integrated straight through receiver with build in very high sensitivity for the time signal transmitted from WWVB, DCF77, JJY, MSF and HBG. The receiver is prepared for single-and dual band (by using additional capacitor matching pin) reception. Integrated functions as stand by mode, complementary output stages and hold mode function offer features for universal applications. The power down mode increases the battery lifetime significantly and makes the device ideal for all kinds of radio controlled time pieces.
2 Features
o Low power consumption (<100A) o Very high sensitivity (0.4V) o Dedicated input for external crystal capacitance matching for dual band application o High selectivity by using crystal filter o Power down mode o o o o o o Only a few external components necessary AGC hold mode Wide frequency range (40 ... 120 kHz) Low power applications (1.2 .. 5.0 V) Improved noise resistance Integrated AGC adaptation
Benefits
o Dual band application o Existing software can be used o Extended battery operating time
QOUT QC QIN DEM
Block Diagram
TCO IN 2 IN 1
+
TCON
AGC
PEAK DET.
BIAS
PON
VCC
GND Figure 1. Block diagram
PK
HLD
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Preliminary Data Sheet
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3 Ordering Information
Extended Type Number Package Remarks CME6005-DDT no die in trays CME6005-TCSH yes SSO16 CME6005-TCQH Yes SSO16 Taped and reeled *The packaged version of CME6005 complies with lead free JEDEC standard J-STD 020B.
4 Absolute Maximum Ratings Parameters
Supply voltage Ambient temperature range Storage temperature range Junction temperature Electrostatic handling (MIL Standard 883 D HBM) Electrostatic handling (MIL MM)
Symbol
VCC Tamb Rstg Tj +/- VESD +/- VESD
Value
5.5 -40 to +85 -55 to +150 125 +/-4000 +/-400
Unit
V C C C V V
5 PAD Coordinates
The CME6005 is available as die for "chip-on-board" mounting and in SSO16 package. DIE size: 1,42mm x 1,63 mm PAD size: 100 x 100 m (contact window 84m / 84m) Thickness: 300m10m Symbol QIN GND QOUT VCC IN2 IN1 TCON TCO PON PK HLD DEM QC Function Crystal Input Ground Crystal output Supply voltage Antenna input 2 Antenna input 1 Negative signal output Positive signal output Power ON input Capacity for AGC AGC hold Demodulator output Crystal matching Cap x-axis (m) 118,5 118,5 118,5 118,5 118,5 118,5 1039,5 1167,8 1167,8 1167,8 1167,8 1167,8 118,5 y-axis (m) 1138,2 969,6 803,3 464,8 304,8 99,6 87,6 471,3 738,4 924,3 1141,5 1326,4 1319,1 Pad # (dice) 1 2 3 4 5 6 7 8 9 10 11 12 13 Pin # (SSO16*) 2 3 4 5 6 7 10 11 12 13 14 15 1
Coordinate requirements should be achieved
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Preliminary Data Sheet
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6- Pad Layout
Pin Layout SSO16
QC 1 QC QIN GND QOUT 13 1 2 3 12 11 10 9 8 DEM QIN 2 HLD PK QOUT 4 PON TCO Th e PA D co or d in a te s are referred to the left bottom point of the contact window VCC 5 IN 2 6 IN 1 7 NC 8
X-axis Reference point (%)
16 NC 15 DEM 14 HLD
GND 3
CME6005 FB
13 PK 12 PON 11 TCO 10 TCON 9 NC
VCC IN 2 IN 1
Y-axis
4 5 6 7
TCON
Figure 2. Pad layout
Figure 3. Pin layout SSO16
PIN Description IN1, IN2
A ferrite antenna is connected between IN 1 and IN 2. For high sensitivity, the Q factor of the antenna circuit should be as high as possible. Please note that a high Q factor requires temperature compensation of the resonant frequency in most cases. We recommend a Q factor between 40 and 150, depending on the application. An optimal signal-to-noise ratio will be achieved by a resonator resistance of 40 k to 100 k.
QOUT, QIN , QC
In order to achieve a high selectivity, a crystal is connected between the Pins QOUT and QIN. It is used with the serial resonant frequency according to the time-code transmitter and acts as a serial resonator. Up to 2 crystals can be connected parallel between QOUT and QIN. For one crystal, the given parallel capacitor of the filter crystal (about 1.4 pF) is internally compensated so that the bandwidth of the filter is about 10 Hz. For two crystals, an additional external capacitor with the value of about 1.4 pF has to be connected parallel between QC and QIN. The impedance of QIN is high. Parasitic loads have to be avoided.
DEM
Demodulator output. To ensure the function, an external capacitor has to be connected at this output.
HLD
AGC hold mode: HLD high (VHLD = VCC) sets normal function, HLD low (VHLD = 0) holds for a short time the AGC voltage. This can be used to prevent the AGC from peak voltages, created by e.g. a stepper motor
PK
Peak detector output. An external capacitor has to be connected to ensure the function of the AGC regulation. The value of the capacitance influences the AGC regulation time.
NOTE: To realize a good regulation timing of the demodulator and the peak detector the value of the capacitors at DEM and PK have to be changed for the different protocols.
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Preliminary Data Sheet
VCC, GND
CME6005 C-MAX
VCC and GND are the supply voltage inputs. The positive supplies have to be connected externally, and also the ground pins. To power down the circuitry it is recommended to use the PON input and not to switch the power supply. Switching the power supply results in a long power up waiting time.
PON
If PON is connected to GND, the receiver will be activated. The setup time is typically 0.5 sec after applying GND to this pin. If PON is connected to VCC, the receiver will switch to Power Down mode.
TCO, TCON
The serial signal of the time-code transmitter can be directly decoded by a micro controller. Details about the time-code format of several transmitters are described separately. If TCO is connected, TCON must be open or counterwise.
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7 Design Hints for the Ferrite Antenna
7.1 Dimensioning of antenna circuit for different clock/watch applications The bar antenna is a very critical device of the complete clock receiver. Observing some basic RF design rules helps to avoid possible problems. The IC requires a resonant resistance of 40 k to 100 k. This can be achieved by a variation of the L/C-relation in the antenna circuit. In order to achieve this resonant resistance, we recommend to use antenna capacitors of a value between 2.2nF and 6.8nF. The optimum value of the capacitor has to be specified respecting the concrete application needs and different boundary conditions(ferrite material, type of antenna wire, available space for antenna coil).It is not easy to measure such high resistances in the RF region. A more convenient way is to distinguish between the different bandwidths of the antenna circuit and to calculate the resonant resistance afterwards. Thus, the first step in designing the antenna circuit is to measure the bandwidth. Figure 12 shows an example for the test circuit. The RF signal is coupled into the bar antenna by inductive means, e.g., a wire loop. It can be measured by a simple oscilloscope using the 10:1 probe. The input capacitance of the probe, typically about 10 pF, should be taken into consideration. By varying the frequency of the time signal generator, the resonant frequency can be determined.
Time signal generator Scope
Probe 10:1
Wire loop
Cres Figure 12.
At the point where the voltage of the RF signal at the probe drops by 3 dB, the two frequencies can then be measured. The difference between these two frequencies is called the bandwidth BWA of the antenna circuit. As the value of the capacitor Cres in the antenna circuit is known, it is easy to compute the resonant resistance according to the following formula: 1 Rres=2 x X BW X C A res Where Rres is the resonant resistance, BWA is the measured bandwidth
Cres is the value of the capacitor in the antenna circuit (Farad). If high inductance values and low capacitor values are used, the additional parasitic capacitance of the coil must be considered. The Q value of the capacitor should be no problem if a high Q type is used. The Q value of the coil differs more or less from the DC resistance of the wire. Skin effects can be observed but do not dominate. Therefore, it should not be a problem to achieve the recommended values of the resonant resistance. The use of thicker wire increases the Q value and accordingly reduces bandwidth. This is advantageous in order to improve reception in noisy areas. On the other hand temperature compensation of the resonant frequency might become a problem if the bandwidth of the antenna circuit is low compared to the temperature variation of the resonant frequency. Of course, the Q value can also be reduced by a parallel resistor. Temperature compensation of the resonant frequency is a must if the clock is used at different temperatures. Please ask your supplier of bar antenna material and of capacitors for specified values of the temperature coefficient.
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Furthermore, some critical parasitics have to be considered. These are shortened loops (e.g., in the ground line of the PCB board) close to the antenna and undesired loops in the antenna circuit. Shortened loops decrease the Q value of the circuit. They have the same effect like conducting plates close to the antenna. To avoid undesired loops in the antenna circuit, it is recommended to mount the capacitor Cres as close as possible to the antenna coil or to use a twisted wire for the antenna-coil connection. This twisted line is also necessary to reduce feedback of noise from the microprocessor to the IC input. Long connection lines must be shielded. A final adjustment of the time-code receiver can be carried out by pushing the coil along the bar antenna.
7.2 Dimensioning of capacitor CDEM The value of 22nF for capacitor CDEM as shown in chapter 9 and 10 represents the minimum value for frequency of 77.5 kHz. For lower frequencies (40kHz, 60kHz) a minimum value of CDEM=47nF should be used. For a better damping of noise and other interference it is recommended to double the values of CDEM,. That means CDEM = 47nF for 77.5kHz and CDEM = 100nF for 40kHz and 60kHz. This optimization has to be done according to each application.
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8 Electrical Characteristics
V
CC
= 3V, input signal frequency 77.5 kHz +/- 5 Hz; carrier voltage 100% reduction to 25% for tMOD = 200ms;
tamb = 25C, max./min. limits are at +25...C ambient temperature, unless otherwise specified.
Parameter
Supply voltage range Supply current Set-up time after VCC ON Reception frequency range Minimum input voltage Maximum input voltage Input amplifier max. gain (VPK = 0.2V) Input amplifier min. gain (VPK = 0.8V) Pins TCO, TCON Output low Output high
Test condition / Pin
Pad/Pin VCC Pad/Pin VCC VCC = 3V
Symbol VCC ICC t Fin
Min.
1.2
Typ.
<90 1.5
Max.
5.5 100
Unit
V A s
40 0.4 30 50 47 -40
120 0.6
kHz V mV dB dB
Pad/Pin IN1, IN2 Pad/Pin IN1, IN2
Vin Vin VU1 VU2
lol = 10A loh = -10A
0.9 x Vcc
0.1 x VCC
V V
Power-ON control; PON
Input level
Pad/Pin PON
Low level High level 00.15 Vcc
0.85 Vcc -0.1 0.1 0.03 0.5 0.05 2
V V A A s
Input leakage current Quiescent current receiver OFF Set-up time after PON
ICC0 t
AGC hold mode; HLD
Input level
Pad/Pin HLD
Low level High level 00.15 Vcc
0.85 Vcc -0.1 0.1
V V A
Input leakage current
AC characteristics
Output pulse width for TCO and TCON Output pulse width for TCO and TCON Modulation according DCF, 200 ms pulse Modulation according DCF, 100 ms pulse
tWO200 tWO100
170 70
195 95
230 130
ms ms
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9 Test Circuitry for single frequency reception
(47nF = JJY) 22nF QOUT QC QIN DEM
Transformer
IN 2
TCO
IN 1
+
to controller
TCON
AGC
PEAK DET.
BIAS
PON
VCC
GND
PK
HLD OFF AGC HOLD
2.2 3V
ON
Figure 12. Test circuit
10 Test Circuitry for dual frequency reception
(47nF = JJY) 22nF QOUT QC QIN DEM
Transformer
IN 2
TCO
IN 1
+
to controller
TCON
AGC
PEAK DET.
BIAS
PON
VCC
GND
PK
HLD OFF AGC HOLD
2.2 3V
ON
Figure 13. Test circuit
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11 Information on the German Transmitter (Customer is responsible to verify this information)
Station: Frequency: Transmitting power:
DCF 77 77.5 kHz 50 kW
Location: Geographical coordinates: Time of transmission:
Mainflingen/Germany 50 01'N, 09 00'E permanent
Time frame 1 minute
(Index count 1 second)
Time frame 40 45 50 55 0 5 10
0
M
5
10
15
20
25
30
35
coding when required
Example: 19.35h S 1 2 4 8 10 20 40 P1 1 2 4 8 10 20 P2
seconds 20
21
22
23
R A1 Z1 Z2 A2 S 1 2 4 8 10 20 40 P1 1 2 4 8 10 20 P2 1 2 4 8 10 20 1 2 4 1 2 4 8 10 1 2 4 8 10 20 40 80 P3
minutes
hours
Calendar day
day month of the week
year
24
25
26
27
28
29
30
31
32
hours
33
34
35
minutes Start Bit Parity Bit P1
Parity Bit P2
Figure 15.
M= R= A1 = Z1 = Minute marker (100ms) Second marker (200ms = transmission by reserve antenna) Announcement of change-over to summer-time or vice versa) DST (summertime = 200ms, otherwise 100ms) Z2 = A2 = S= DST (wintertime = 200ms, otherwise 100ms) Announcement of leap second Startbit of time code information
P1-P3 = Parity check bits
Modulation
The carrier amplitude is reduced to 25% at the beginning of each second for a period of 100 ms (binary zero) or 200 ms (binary one), except the 59th second.
Time-Code Format (based on Information of Deutsche Bundespost)
The time-code format consists of 1-minute time frames. There is no modulation at the beginning of the 59th second to indicate the switch over to the
next 1-minute time frame. A time frame contains BCD-coded information of minutes, hours, calendar day, day of the week, month and year between the 20th second and 58th second of the time frame, including the start bit S (200 ms) and parity bits P1, P2 and P3. Furthermore, there are 5 additional bits R (transmission by reserve antenna), A1 (announcement of change-over to summer time), Z1 (during summer time 200 ms, otherwise 100 ms), Z2 (during winter time 200 ms, otherwise 100 ms) and A2 (announcement of leap second) transmitted between the 15th second and 19th second of the time frame.
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12 Information on the Swiss Transmitter (Customer is responsible to verify this information)
Station: Frequency: Transmitting power:
HBG 75 kHz 20 kW
Location: Geographical coordinates: Time of transmission:
Prangins/Switzerland 46 24'N, 06 15'E permanent
Time frame 1 minute
(Index count 1 second)
Time frame 40 45 50 55 0 5 10
0
X
5
10
15
20
25
30
35
coding when required
Example: 19.35h S 1 2 4 8 10 20 40 P1 1 2 4 8 10 20 P2
seconds 20
21
22
23
24
A E H L S 1 2 4 8 10 20 40 P1 1 2 4 8 10 20 P2 1 2 4 8 10 20 1 2 4 1 2 4 8 10 1 2 4 8 10 20 40 80 P3
minutes
hours
Calendar day
day month of the week
year
25
26
27
28
29
30
31
32
hours
33
34
35
minutes Start Bit Parity Bit P1
Parity Bit P2
Figure 15.
X= A= E= H= Minute marker Announcement of change over to summer time or vice-versa DST (summertime = 200ms, otherwise 100ms) DST (wintertime = 200ms, otherwise 100ms) L= S= Announcement of leap second Startbit of timecode information
P1-P3= Partiy check bits
Modulation
The carrier amplitude is reduced to 25% at the beginning of each second for a period of 100 ms (binary zero) or 200 ms (binary one), except the 59th second.
Time-Code Format (based on Information of Bundesamt fur Metrologie und Akkreditierung (METAS))
The time-code format consists of 1-minute time frames. There is no modulation at the beginning of the 59th second to indicate the switch over to the
next 1-minute time frame. A time frame contains BCD-coded information of minutes, hours, calendar day, day of the week, month and year between the 20th second and 58th second of the time frame, including the start bit S (200 ms) and parity bits P1, P2 and P3. Furthermore, there are 5 additional bits R (transmission by reserve antenna), A (announcement of change-over to summer time), E (during summer time 200 ms, otherwise 100 ms), H (during winter time 200 ms, otherwise 100 ms) and L (announcement of leap second) transmitted between the 15th second and 19th second of the time frame.
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13 Information on the British Transmitter (Customer is responsible to verify this information)
Station: Frequency: Transmitting power:
MSF 60 kHz 50 kW
Location: Geographical coordinates: Time of transmission:
Rugby 52 22'N, 01 11'W permanent, except for quarterly and annual outages
Time frame 1 minute
(Index count 1 second)
Time frame 40 45 50 55
0
0
5
10
15
20
25
30
35
0
5
10
80 40 20 10 8 4 2 1 10 8 4 2 1 20 10 8 4 2 1 4 2 1 20 10 8 4 2 1 40 20 10 8 4 2 1 0
Switch over to the next time frame
year
month
day of the month
day of the week
hour
minute Parity check bits
0
1
500ms 500ms
minute identifier BST hour + minute day of the week day + month year BST / GMT change impending
Example: March 1993
80
40
20
10
8
4
2
1
10
8
4
2
1
Seconds
17
18
19
20
21
year
22
23
24
25
26
27
month
28
29
30
Figure 16.
Modulation
The carrier amplitude is switched off at the beginning of each second for a period of 100 ms (binary zero) or 200 ms (binary one).
Time-Code Format
The time-code format consists of 1-minute time frames. A time frame contains BCD coded information of year, month, calendar day, day of the week, hours and minutes. At the switch-over to the next time frame, the carrier amplitude is reduced for a period of 500 ms. The presence of the fast code during the first 500 ms at the beginning of the minute is not guaranteed. The transmission rate is 100 bit/s and the code contains information of hour, minute, day and month.
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14 Information on the US Transmitter (Customer is responsible to verify this information)
Station: Frequency: Transmitting power:
WWVB 60 kHz 50 kW
Location: Geographical coordinates: Time of transmission:
Fort Collins/Colorado 40 40'N, 105 03' W permanent
Time frame 1 minute
(Index count 1 second)
Time frame 40 45 50 55
L1 L2 TCA DST P0
0
P0 FRM 40 20 10
5
8 4 2 1 P1
10
20 10
15
8 4 2 1 P2
20
200 100
25
30
35
0
5
10
ADD SUB ADD P4 800 400 200 100
80 40 20 10 P3 8 4 2 1
80 40 20 10 P5 8 4 2 1
minutes
hours
days
UTI sign
UTI correction (ms)
year
daylight saving time bits leap second warning bit leap year indicator bit
FRM =
0.2s 0.5s "1" "0" 0.8s "P"
Frame Marker
L1 = Leap year indicator "1" = non leap year "0" = leap year The bit is set to 1 during each leap year after January 1 but before February 29. It is set back to 0 on January 1 of the year following the leap year. L2 = Leap second warning bit The bit is set to 1 near the start of the month in which a leap second is added. It is set to 0 immediately after the leap second insertion. TCA = DST = Time change announcement Daylight savings time bit
P0 - P5 = Position marker
Modulation
The carrier amplitude is reduced by 10 dB at the beginning of each second and is restored within 500 ms (binary one) or within 200 ms (binary zero) or within 800 ms (position-identifier marker or frame reference marker).
Time-Code Format
The time-code format consists of 1-minute time frames. A time frame contains BCD-coded information of minutes, hours, days and year. In addition, there are 6 position-identifier markers (P0 thru P5) and 1 frame-reference marker with reduced carrier amplitude of 800 ms duration
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15 Information on the Japanese Transmitter (Customer is responsible to verify this information)
Station: Frequency: Transmitting power:
Ohtakadoya-yama 40 kHz 50 kW
Location: Geographical coordinates: Time of transmission:
Miyakoji Vil.,Fukushima Pref. 37 22'N, 140 51'E permanent
Station: Frequency: Transmitting power:
Hagane-yama 60 kHz 50 kW
Location: Geographical coordinates: Time of transmission:
Fuji Vil., Saga Pref. 33 28'N, 130 11'E permanent
Time frame 1 minute
(Index count 1 second)
Time frame 40 45 50 55 0 5 10
0
P0 FRM 40 20 10
5
8 4 2 1 P1
10
20 10
15
8 4 2 1 P2
20
200 100
25
30
35
minutes
hours
days
0.8s 0.5s "1" "0"
0.2s "P"
FRM LS1 LS2 P0-P5 Pa1+Pa2
Modulation Time-Code Format
The carrier amplitude is 100% at the beginning of each second and is switched to 10% after 500 ms (binary one) or after 800 ms (binary zero) or after 200 ms for Position-identifier marker (P0...P5) and frame reference marker. The time-code format consists of 1-minute time frames. A time frame contains BCD-coded information of minutes, hours, days, weeks and year. In addition, there are 6 position-identifier markers (P0 through P5) with reduced carrier amplitude of 800 ms duration.
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PA1 PA2 SU1 P4 SU2 80 40 20 10 8 4 2 1 P5 4 2 1 LS1 LS2 0 0 0 0 P0
80 40 20 10 P3 8 4 2 1
year
Leap second
0.5 second: Binary one 0.8 second: Binary zero 0.2 second: Position identifier markers P0...P5
= = = = =
Frame marker Leap second Leap second Position identifier markers Parity bits
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16 Package information
Package SSO16 Dimensions in mm
5.00 max 5.00 4.80 6.2 5.8
1.40 0.25 0.635 4.45 16 9 3.95 max 5.2 4.8 0.2
0.25 0.10
Technical drawings according to DIN specifications
1
8
Recommended Infrared/Convection Solder Reflow Profile (SMD packages)
Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (TSmin) - Temperature Max (TSmax) - Time (min to max) (ts) TSmax to TL - Ramp-up rate Time maintained above: - Temperature (TL) - Time (tL) Peak Temperature (TP) Time within 5C of actual Peak Temperature (tP) Ramp-down rate Time 25C to Peak Temperature Pb-free assembly 3C/second max. 150C 200C 60-180 seconds 3C/second max. 217C 60-150 seconds 260 +0/-5C 20-40 sec. 6C/second max. 8 minutes max.
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Tp Ramp-up
tp Critical Zone TL to Tp
Temperature
Tsmax
tL
Tsmin
ts
Preheat
Ramp-down
25
t 25C to Peak
Time
Recommended Wave Soldering (Through hole packages)
Condition Maximum lead temperature (5s) Symbol TD Value 260 Unit C
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17 Ozone Depleting Substances Policy Statement
It is the policy of C-MAX to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere, which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. C-MAX has been able to use the policy of continuous improvements to eliminate the use of ODSs listed in following documents. 1. Annex A,B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA. 3. Council Decision 88/540/EEC and 91/690/EEC Annex A,B and C ( transitional substances) respectively. C-MAX can certify that our semiconductor CME6005 is not manufactured with ozone depleting substances and do not contain such substances.
Disclaimer of Warranty
Information furnished is believed to be accurate and reliable. However C-MAX assumes no responsibility, neither for the consequences of use of such information nor for any infringement of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of C-Max. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. C-MAX products are not authorized for use as critical components in life support devices without express written approval of C-MAX.
Note
It is not given warranty that the declared circuits, devices, facilities, components, assembly groups or treatments included herein are free from legal claims of third parties. The declared data are serving only to description of product. They are not guaranteed properties as defined by law. The examples are given without obligation and cannot given rise to any liability. Reprinting this data sheet - or parts of it - is only allowed with a license of the publisher. C-MAX reserves the right to make changes on this specification without notice at any time.
C-MAX Europe GmbH
Aspergerstr. 39 74078 Heilbronn
C-MAX Technology Ltd
Unit 1801,Tower II, Enterprise Square, 9 Sheung Yuet Road, Kowloon Bay, Kowloon H.K.
Tel.: +49-7066-941000 Fax: +49-7066-941005
e-mail: contact@c-max-europe.de
Tel.: +852-2798-5182 Fax: +852-2798-5379
e-mail: inquiry@c-max.com.hk
Data sheets can also be retrieved from our Internet homepage: www.c-maxgroup.com
CME6005-E.doc
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Price & Availability of CME6005-TCSH

	To Download CME6005-TCSH Datasheet File
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