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Engineering parameters receiver module DCF - EM6 DCF

Once the receiver module EM6 DCF is combined with a tuned ferrite antenna (77.5kHz), then it constitutes a complete receiver- and demodulator-unit for the german time-code signal DCF77. On its output the module supplies the demodulated DCF-signal, able to be decoded afterwards by a corresponding microcontroller unit. By use of the corresponding configuration circuit the polarity of output-signal can be or conform to the original DCF-signal or conform to the inverted DCF-signal.

 

Technical Parameters:

 

Signal carrier-frequency received

 

77.5 kHz

 

Nominal power supply voltage

 

1.5V or 3V

 

Power supply voltage range

 

1.1 - 3.6V

 

Current consumption @ 3V

 

< 250 µA

 

Quiescent current in „ Stand by “ mode

 

< 0.5 µA

 

Operation temperature range

 

0 - 50°C

 

Setup time

 

< 2 sec

 

Minimum input voltage / sensitivity
a) signal directly fed by signal generator
b) signal received with antenna; w/o noise

 


³ 0.6 µV
³ 10 µV/m **

 

Antenna resonant impedance

 

40 - 100 kW

 

Receiver module output
(Open-Collector stage)

 

LP6 - npn£ 30 µA
LP7 - pnp£ 30 µA

 

Output pulse width @ received standard pulse of 100 ms

…………of 200 ms

 

70 - 130 ms
170 - 230 ms
** ferrite bar antenna :length = 60 mm;diameter = 10 mm
antenna circuit :L= 897 µH;C = 4.7 nF;Q >100