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AG2130 Schematic ( PDF Datasheet ) - Silver

Teilenummer AG2130
Beschreibung LOW COST PSTN INTERFACE
Hersteller Silver
Logo Silver Logo 




Gesamt 11 Seiten
AG2130 Datasheet, Funktion
www.DataSheet4U.com
Silver
TELECOM
Pb
• Approved to:
EN 60950-1:2001
IEC60950-1: First Edition 2001
AS/NZ60950-1: 2003
UL60950-1: 2003 1st Edition
CSA 22.2 No.60950-1-03 1st Edition
V1.4 September 2006
Ag2130Data Sheet
LOW COST PSTN
INTERFACE
FEATURES
• A highly featured PSTN Interface (COIC,
FXO, DAA, Trunk Interface) in a single
12mm high SIL device.
• +5V or +3.3V supply.
• Transformer isolation providing high
common-mode rejection (CMRR) for use in
un-grounded systems.
• Highly integrated with on-board loop switch
and diode bridge.
• Loop start circuit, ringing detect, line
detection and parallel phone detect.
• On-hook reception.
• Meets requirements of FCC Pt68.
Low cost power cross protection.
• Programmable d.c. mask, line and network
impedances, allows use in any market.
• Silver Telecom “design-in” assistance.
DESCRIPTION
The Ag2130 is a self-contained highly
integrated PSTN Interface Circuit in a single
SIL module, which complies with ROHS
requirements.
In addition to the features listed, the Ag2130
allows flexible programming of many
functions, including the dc voltage mask and
impedances. The Ag2130 meets international
safety and regulatory requirements.
The device requires a minimum of external
components and has been specified for ease
of use, to allow reduced time to market.
The Ag2130 is designed for all applications,
including those where there is a high level of
common mode interference, such as PABX,
long loop applications and systems without a
ground connection.
© Silver Telecom 2006






AG2130 Datasheet, Funktion
V1.4 September 2006
Data Sheet
Ag2130 can receive signals when on-hook, presenting
a high impedance to the line. I.e. whilst drawing a very
small current (5µA approx) from the line.
3.5 Ringer Load Networks
The “dummy ringer” is usually a capacitive/resistive
load which is connected across TIP/RING. During a
call it is of sufficiently high impedance not to affect the
operation of the interface. The Ag2130 meets the
dummy ringer requirements for CTR21 (Europe), USA
and Asia.
4.0 Device Protection.
Like many of the performance requirements which the
Ag2130 must meet, protection for the interface is
dependent upon regulatory standards in the market in
which the equipment is deployed. Some examples are
given below, but these are not exhaustive.
For a more comprehensive overview of protection for
line interfaces, refer to our Over-voltage Protection
Applications Note. This is may be downloaded from the
Silver Telecom web-site (www.silvertel.com) or will be
provided by our local representative.
4.1 FCC Pt 68 Requirements.
To withstand the FCC Pt68 longitudinal voltage surge
of 1500V no protection is required, as the barrier will
withstand 1500V peak voltage to GND.
To withstand the FCC Pt68 metallic surges at 800V
ZT
Ag2130
LOW COST PSTN INTERFACE
requires a 130V AC varistor (which clamps at 300V
which is the maximum rating of the loop switch
transistor). A 14mm device should be used to
withstand the two 100A 10/560us surges.
Examples of suitable devices are:-
Joyin JVR-14N201K;
Walsin VZ14D201KBS
Note: If varistors to ground are used for added
protection (e.g. more than 1500V) customers should be
aware that the FCC test generator for longitudinal tests
is rated at up to 1000A. 10Ω, 2W wire wound surge
limiting resistors will also be needed.
4.2 EN/UL60950 Protection.
To meet the EN/UL60950 mains cross test 22Ω, 2W
wire wound surge resistors and 0.35A special fuses
(Bussman C515 or Littelfuse 220003) in a balanced
configuration are required. Alternatively a Teccor
F1250T fuse may be used without surge limiting
resistors.
It is also possible to use PTC thermistors to meet these
tests. The Raychem TR600-150 is designed for this
application. See Raychem Application Notes for further
details. A typical application is shown in figure 6a.
4.3 Other Standards.
The Ag2130 has provision for low cost mains cross
protection (CCITT K21): a 47Ω, 2W wire wound surge
resistor and a PTC thermistor are sufficient to meet
regulatory approvals. A suitable device is the Walsin
ZC
DMa
ZT1 ZT2
ZB
Ag2130R1
DMb
ZB1
VIN
VOUT
RS
LSC
PTC X1
Protection Circuit
SilverTIP VRTREF
VTRREF
TT EELLEECCO OM
RING
VCC
+
C6
C4 GND
Protection circuit depends
upon precise application
GND
+
C5
VCC
VoicePump DSP shown for illustration
purposes. Ag2130 can interface to any codec
C1
LOUT
C2 LIN VoicePump
VP140
AGPIO DSP
Processor
Interface
For 600R line and balance impedance: R1 = 390k
ZB1 = 100k
ZT = 300
ZC = 47K
C1, C2, C4 = 100nF
C5 = 10uF , C6 = 100uF
Typical protection:
PTC = TR600 -150 (Raychem)
X1 = TVB200SA (Raychem)
Figure 4: Typical Application
© Silver Telecom 2006
6

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