AMIS30585C5852RG ON Semiconductor, AMIS30585C5852RG Datasheet - Page 9

• Manufacturer Part Number: AMIS30585C5852RG
• Description: IC MODEM S-FSK HALFDUPLEX 28PLCC
• Manufacturer: ON Semiconductor

Specifications of AMIS30585C5852RG

• Baud Rates: 14.4k
• Interface: SCI
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 28-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -

50/60 Hz Suppression Circuit
mains coupling device has a typical attenuation of 60 dB.
This brings a mains frequency of 220 V rms well below the
sensitivity level. Typical values are shown in Table 6.
Oscillator
crystal of 24 MHz. XIN is the input to the oscillator inverter
gain stage and XOUT is the output.
must be connected to the oscillator pins (Values of capacitors
are indicative only and are given by the crystal
manufacturer. For a crystal requiring a parallel capacitance
of 20 pF CX must be around 30 pF.)
crystal must be smaller than 80 W.
must be higher than 1 MW. The parasitic leakage resistance
between XIN and VSS must be higher than 1 MW.
directly as a clock output because the voltage swing on this
pin is limited.
Zero Crossing Detector
detector input. If the mains are connected directly to this pin
a resistance must be connected in series to limit the current
through the protection diodes. Advisable is a series resistor
of 1 MW (R50). The zero crossing detector output is logic
zero when the input is lower than the falling threshold level
and a logic one when the input is higher than the rising
threshold level.
detector are filtered by a period between 0.5 ms and 1 ms.
Rising edges are not filtered.
5 V Safe Output
detained by placing a pull up resistance between the output
pin and the 5 V supply. Typical resistance value is 10 kW.
(TXD, TXEN3, TX_DTATA)
A typical attenuation for 50 Hz of this filter is 80 dB. A
The oscillator works with a standard parallel resonance
For correct functioning the following external circuit
To guarantee startup the series loss resistance of the
The parasitic leakage resistance between XIN and XOUT
When working with a crystal, XOUT cannot be used
The pin M50HZ_IN can be used as a mains zero crossing
The falling edges of the output of the zero crossing
5 V safe pins are open drain output. The high level is
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9
Configuration
the application controller.
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Baud for 50 Hz mains
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Baud for 60 Hz mains
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AMIS−30585 data book, user interface documentation.
Application Example
example shows the AMIS−30585 with its companion
devices. Namely the power line driver (AMIS−3058), the
application controller and a meter device interface.
bandpass filter is used to reduce the noise outside the
transmission band. The filter is realized with external
passive components.
through a line transformer and a capacitive coupling.
modem and the application is done through the SCI. The link
to the meter device will be done easily by using the meter
device interface chip. This device is used to realize the
physical interface between the controller and the standard
S0 pulse (DIN 19234) generator output of the meter device.
R4 = 1 K, R5 = 1.66 K.
paragraph.
Table 6. TYPICAL EXTERNAL COMPONENT VALUES
Configuration is loaded through the SCI interface from
Configuration method and utilization are described in the
A typical application example is given below. The
Between the modem chip and the line driver, an active
From the line driver, the connection to the mains is done
From the application side, the interface between the
C1 = C2 = 325 pF, R1 = 22.6 K, R2 = 2.2 K, R3 = 16.5 K,
Other values are given in the typical external components
Mains frequency 50/60 Hz
Master/slave/monitor/initialization configuration
Baud rate selection 300/600/1200
Baud rate selection 360/720/1440
Carrier frequency programmation
Carrier frequency spread
C12
R12
C20
C11
R11
82 K
39 K
560
560
1
pF
pF
mF
W
W