AG2130 [ETC]
LOW COST PSTN INTERFACE; 低成本PSTN接口
| 型号： | AG2130 |
| 厂家： | 
ETC |
| 描述： | LOW COST PSTN INTERFACE |
| 文件： | 总11页 (文件大小：425K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
V1.4 September 2006
Data Sheet
Ag2130
Silver
LOW COST PSTN
INTERFACE
T E L E C O M
FEATURES
Pb
• 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.
• Approved to:
EN 60950-1:2001
IEC60950-1: First Edition 2001
AS/NZ60950-1: 2003
• Programmable d.c. mask, line and network
impedances, allows use in any market.
UL60950-1: 2003 1st Edition
CSA 22.2 No.60950-1-03 1st Edition
• Silver Telecom “design-in” assistance.
DESCRIPTION
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 a self-contained highly
integrated PSTN Interface Circuit in a single
SIL module, which complies with ROHS
requirements.
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.
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.
© Silver Telecom 2006
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
Ordering Information
Ag2130S
Fully featured Trunk in SIL package (RoHS Compliant)
Silver
Ag2130
T E L E C O M
Figure 1: Ag2130S - SIL Packaging Format
ZT1
ZT2
ZB
VCC GND
DMa
DMb
Power
Management
VTR
VOUT
VIN
2-4 Wire
Converter
Line
Termination
&
Tip
Ring
Loop
Switch
RS
Supervision
LSC
Anode Gate
Cathode
Figure 2: Functional Block Diagram
© Silver Telecom 2006
2
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
1.0 Pin Description
1.1 SIL Pin-Out
Pin #
Name
Description
1
2
RING (B) Ring. Connects to the subscriber line Ring.
TIP (A)
Tip. Connects to the subscriber line Tip.
Cathode. For power cross protection connect to protection device
cathode.
3
CATHODE
Anode. For power cross protection connect to protection device
anode.
4
5
6
ANODE
GATE
DMb
Gate. For power cross protection connect to protection device gate.
DC Mask b. A resistor is connected between this pin and DMa to
adjust the d.c. characteristics of the termination.
DC Mask a. A resistor is connected between this pin and DMb to
adjust the d.c. characteristics of the termination.
7
8
9
DMa
nc
No connect. This pin is not used and can be left open circuit.
Audio In. This is the analog input signal from the Codec (which is
output on Tip and Ring). Connected via a 100nF capacitor.
VIN
Audio Out. This is the analog output signal (from Tip and Ring) to the
Codec. Connected via a 100nF capacitor.
10
11
VOUT
LSC
Loop switch control. Applying a logic 1 closes the integral loop
switch.
12
13
GND
VCC
Analog ground. Normally connected to system ground.
Positive supply. Must be connected to +5V or +3.3V.
14
15
nc
ZB
No connect. This pin is not used and can be left open circuit.
Balance network. The network balance matching components are
connected between this pin, VIN and GND.
2 Wire matching network 2. The 2 wire impedance matching network
is connected between this pin and ZT1. The compensation impedance
Zc is connected between this pin and ZB.
16
ZT2
2 Wire matching network 1. The 2 wire impedance matching network
is connected between this pin and ZT2.
17
18
19
20
ZT1
RS
Ringing signal. A logic 0 indicates the presence of ringing voltage on
the telephone line. Toggles at ringing frequency.
Reference voltage output. Used with VTR to detect parallel phone.
VREF
VTR
VREF is approximately +VCC/2. Connect 100µF to GND from this pin.
Tip/Ring voltage. Indicates the voltage between Tip/Ring. Divided by
220 and relative to Vref.
© Silver Telecom 2006
3
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
2.0
Line Interfacing
is done when the terminating equipment wishes to
begin a call or in response to the reception of the
ringing signal. The LSC pin can be controlled by the
output drive pins of a codec or from a micro controller
device.
The Ag2130 line interface provides a flexible and
robust interface to the telephone line. It has been
designed to meet regulatory standards whilst providing
a space and power efficient solution.
2.1
D.C. Termination.
2.2.2 Ringing Detection and Sensitivity.
Any equipment terminating a telephone line must
present the correct d.c. resistance to the line. This
ensures that the correct loop current flows for detection
of the off-hook condition. It avoids excessive power
dissipation in the Subscriber Line Interface (SLIC) and
the Subscriber’s equipment and minimises the size of
power supply needed to drive the SLIC.
The terminal equipment must be capable of detecting
and responding to an incoming call in the same way as
a telephone set.
The termination circuitry must,
therefore, detect the presence of the ringing signal.
The Ag2130 provides an output, RS, which indicates
the presence of ringing by switching from a logic 1 to
logic 0. The RS output will toggle at the ringing
frequency. A capacitor to ground can also be added if
ringing cadence is needed rather than the ringing
frequency.
The Ag2130 has been designed to meet the
requirements of many network operators. This is done
by making the d.c. characteristic adjustable. This is
controlled by connecting the DM pins on the line side of
the circuit. Table 1 shows how these are connected.
The sensitivity to ringing is set internally to 22VRMS
when VCC is +5V.
Table 1 Set Up of the DM Pins
Market
DMa
DMb
3.0 The 2-4 Wire (Hybrid) Conversion.
North America
(EIA 464, Resistive)
Connect together through
390K resistor
The Ag2130 transmits and receives balanced 2-wire
analog signals at the Tip and Ring connections. These
are converted to a ground referenced output at VOUT
Connect together through
390K resistor
Europe (CTR21)
Far East
Connect together through
390K resistor
and from a ground referenced signal at VIN.
VOUT and VIN are normally connected to a codec (via
d.c. blocking capacitors) for conversion to and from a
Pulse Code Modulated (PCM) stream.
2.2
Signalling and Loop Status.
The Ag2130 provides facilities to monitor and control
the telephone line. This allows the device to be used
with a variety of loop signalling schemes and minimises
the number of external components needed to
implement a complete line interface.
3.1 Transmit and Receive Gain.
The off-hook gain in both the transmit and receive
directions is set at typically 0dB. Any gain adjustments
can be made using the codec functionality. This is
either by hardware or software depending upon the
codec used.
In order to implement ground start applications please
contact Silver Telecom or our local representative.
2.2.1 The On-Board Loop Switch
The Ag2130 implements the loop start protocol when
initiating and answering a call. This means that a
switch must be closed to allow loop current to flow,
signalling to the SLIC that the terminating equipment
has gone “off-hook”. This has been done historically
by a relay. The Ag2130 uses an integral optically
isolated switch to do this, eliminating the need for an
external relay, so space and cost is saved for the user.
The on-board Loop Switch is controlled by the LSC pin.
A logic 1 applied to the pin closes the loop switch. This
© Silver Telecom 2006
4
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
Network
Balance
Impedance
2-wire
eg.
ZT
ZC
Zb1
Zb2
Zb3
C3
Notes
Impedance
USA Short Line,
Far East, Middle East
1
2
3
47K
100K
0R
5.1K
0R
---
---
---
---
---
---
600Ω
CTR21
900Ω
300Ω
600Ω
CTR21
900Ω
750R//
68K//
220nF 680pF
220K//
680pF
Europe
62K
220K
USA Long Line, Brazil
620Ω
100R
+1K//100nF
4
47K
39K
39K
0R
1.5nF
Japan
600Ω
300Ω
Table 2: Line and Network Balance Impedance Examples
coefficients a model of the Ag2130 must be used. This
file, in .CIR format is available on request from Silver
Telecom or one of our representatives.
3.2 The 2 Wire Impedance
The input impedance, ZIN, of the Ag2130 can be
programmed. This is achieved by connecting an
impedance matching network between ZT1 and ZT2.
This network is the line impedance to be matched
minus 300Ω. For example to match 600Ω, fit a 300Ω
resistor. Other common line impedances, and the
corresponding programming components are listed in
Table 2.
Full details on how the Codec is programmed must be
obtained from the Codec manufacturer.
3.3
Network Balance Impedance
The setting of the network balance impedance is very
similar to that of the 2 wire impedance. Again this can
be done by programming of the codec, using the .CIR
file, or it can be done by hardware components.
In addition to the programming network, an impedance,
ZC must be fitted between ZT2 and Zb to provide gain
and frequency compensation.
3.4
On-Hook Reception
An alternative method of programming the 2 wire
impedance is to choose a codec where the internal
filter characteristics can be programmed to provide the
correct matching. In order to generate the filter
The need for data exchange when on-hook is
becoming increasingly common. This may be required
for Caller Line I.D. or for telemetry purposes. The
VCC
C
ZTT
ZBB
ZBB
3
2
ZCC
CC3
ZBB
GNND
1
VC
ZT
ZT
2
Zb
C
1
CC1
VIN
Ag2130
DMa
R1
C2
VO
T
DMb
For 600Ω application:
R1 = 390K
ZB1 = 100K
ZB2 = 0R
ZB3 = NF
ZT = 300R
Silver
T E L E C O M
G
ND
ZC = 47k
C1, C2 = 100nF
C3 = NF
GGND
Figure 3: Line Impedance and Network Balance Components
© Silver Telecom 2006
5
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
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.
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.
3.5
Ringer Load Networks
Examples of suitable devices are:-
Joyin JVR-14N201K;
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.
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.
4.0
Device Protection.
4.2
EN/UL60950 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.
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.
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.
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.
4.1
FCC Pt 68 Requirements.
4.3
Other Standards.
To withstand the FCC Pt68 longitudinal voltage surge
of 1500V no protection is required, as the barrier will
withstand 1500V peak voltage to GND.
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
To withstand the FCC Pt68 metallic surges at 800V
ZT
ZC
VoicePump DSP shown for illustration
purposes. Ag2130 can interface to any codec
ZT1
ZT2
DMa
DMb
ZB
ZB1
R1
C1
VIN
Processor
Interface
LOUT
LIN
Ag2130
VOUT
VoicePump
VP140
C2
RS
LSC
VTR
VREF
AGPIO
DSP
TIP
Silver
PTC
X1
+
T E L E C O M
For 600R line and balance impedance:
R1 = 390k
ZB1 = 100k
RING
C6
GND
VCC
Z = 300
Ω
Protection Circuit
ZCT = 47K
C4
Protection circuit depends
upon precise application
C1, C2, C4 = 100nF
C5 = 10uF, C6 = 100uF
PTC = TR600 -150 (Raychem)
X1 = TVB200SA (Raychem)
+
C5
Typical protection:
GND
VCC
Figure 4: Typical Application
© Silver Telecom 2006
6
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
F
Ag2130
Ag2130
PTC
PTC
TIP
TIP
Central Office Line
X1
Central Office Line
RING
GATE
47R, 2W
RING
TPP25011
GATE
hook
ANODE
ANODE
CATHODE
CATHODE
Fig 5a: Standard Protection
Fig 5b: Off-hook Protection
Figure 5: Protection Options
PTD3A350H26. (Metallic protection with a single
device is all that is required, as the Ag2130 will
withstand longitudinal voltages up to 1000Vrms to
ground without additional protection).
In order to maintain this approval when the Ag2130 is
incorporated into a host system care must be taken to
maintain the user protection provided in the Ag2130 by
ensuring adequate separation of the line side circuitry
and components from the protected circuit so that the
barrier is not compromised. The system should be
housed in a fire enclosure made of a suitable flame
retardant material.
As an option, for improved off-hook power cross
protection, the Ag2130 has been designed to interface
directly to the STM TPP25011.
arrangement is shown in figure 6b.
This protection
For USA and Canada the line cord connecting the
system to the network must have minimum 26AWG
conductors.
5.0
Regulatory Standards
There are some aspects of international standards that
are not fully met by the Ag2130. These are shown
below. It is Silver Telecom’s policy to bring to the
attention of customers all known exceptions.
User/Network safety from mains power voltage
(EN60950 paragraphs 2.1.1 and 6.1) must be provided
externally by a power supply with reinforced or double
insulation.
The Ag2130 meets the requirements of EN60950-1:
2001 paragraph 6.1.2.1 for all countries except
Norway, Sweden and Finland. Please contact Silver
Telecom if the product is needed for these countries.
6.0 Layout
The Ag2130 has been approved to the following safety
standards:
EN 60950-1:2001
Signal tracks should be kept as short as possible.
Special attention should be paid to DMa, DMb and Z
as these are sensitive nodes.
B
IEC60950-1: First Edition 2001
AS/NZ60950-1: 2003
UL60950-1: 2003 1st Edition
CSA 22.2 No.60950-1-03 1st Edition
© Silver Telecom 2006
7
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
7.0 Absolute Maximum Ratings*
All Voltages are with respect to ground unless otherwise stated.
Parameter
Sym Min
Max Units
1 DC supply voltage
VCC
-0.3
6.0
300
6.0
V
V
2 DC battery voltage present between Tip and Ring (on-hook) VTR
3 Maximum voltage on programmable pin, LSC
-0.3
V
PTRUNK
ILOOP
IRING
TS
4
0.75
90
W
Maximum power dissipation @ 25°C
5 Maximum loop current (continuous)
6 Maximum ringing current (for 0.5 second)
7 Storage Temperature
mA
mARMS
OC
185
+100
-40
*Exceeding the above ratings may cause permanent damage to the product. Functional operation under these conditions is not implied.
Maximum ratings assume free air flow.
8.0 Recommended Operating Conditions*
All Voltages are with respect to ground unless otherwise stated.
Parameter
Symbol
VCC
Min
4.75
3.13
Typ
5.0
3.3
Max
5.25
3.47
Units
1
2
DC supply voltage (+5V operation)
DC supply voltage (+3.3V operation)
V
V
VCC
DC battery voltage on Tip and Ring
(on-hook)
VTIP
VRING
0
0
0
-48
-120
-120
V
V
3
4
5
DC loop current
ILOOP
TOP
0
0
25
25
85
70
mA
OC
Operating Temperature
*Typical figures are at 25°C with nominal +5V or +3.3V supplies and are for design use only.
© Silver Telecom 2006
8
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
9.0 DC Electrical Characteristics.
Characteristic
Supply current, on-hook3
Loop current range
Sym Min Typ2 Max Units Test Comments1
1
2
ICC
2.5
4.0
mA
mA
ILOOP 14.0
85.0
+5V operation
@ 50µA
@ -50µA
+3.3V operation
@ 50µA
@ -50µA
Status output, RS
Output low voltage
Output high voltage
3
4
5
6
7
8
VOL
VOH
0.4
0.4
0.5
V
V
4.5
2.8
2.5
Status output, RS
Output low voltage
Output high voltage
VOL
VOH
V
V
Control input, LSC
Input low voltage
Input high voltage
VIL
VIH
V
V
+5V operation
+5V operation
+3.3V operation
+3.3V operation
Control input, LSC
Input low current
Input high current
IIL
IIH
200
450
µA
µA
Control input, LSC
Input low voltage
Input high voltage
VIL
VIH
0.5
V
V
2.5
Control input, LSC
Input low current
Input high current
IIL
IIH
100
300
µA
µA
ILOOP = 20mA
DMa-DMb = 390K
9
Off-hook DC voltage
5.7
V
Leakage current, Tip and Ring to
analog ground
10
11
ILA
35
35
100VDC
100VDC
µA
µA
Leakage current on-hook, Tip to
Ring
ILTR
All DC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless
otherwise stated.
1 For test circuit details please contact Silver Telecom
2 Typical figures are at 25°C with nominal supply and 25mA loop current, unless otherwise stated. These figures
are for design aid only.
3 Operating currents are dependent on the users application.
© Silver Telecom 2006
9
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
10.0 AC Electrical Characteristics.
Characteristic
Sym
Min Typ* Max Units Test Comments1
Ringing voltage: detect
Ringing voltage: no detect
30
26
26
26
+5V supply
17 to 68Hz
VRD
VRD
VRMS
VRMS
1
2
22
18
Ringing voltage: detect
Ringing voltage: no detect
22
22
+3.3V supply
17 to 68Hz
3
4
5
6
7
Input Impedance at VIN
100
kΩ
Ω
dB
dB
dB
Output impedance at Vout
Voltage gain, 2 Wire to VOUT
Voltage gain, VIN to 2 Wire
On-hook gain, 2 Wire to VOUT
10
+0.5
0
-0.5
0
Off-hook, 1KHz
Off-hook, 1KHz
On-hook, 1kHz
-1.0 -0.5
-6.8 -6.3 -5.8
Relative gain, referenced to
1kHz. 2Wire - Vout, Vin - 2Wire
dB
%
8
9
-0.5
+0.5
1.0
300 - 3400 Hz
@0dBm, 1kHz
Total harmonic distortion @
2Wire and Vout
THD
OD
0.1
0.5
80
Overload distortion @2 Wire and
Vout @+3dBm, 1 kHz
+5V supply
+3.3V supply
%
10
5.0
Common mode rejection ratio
off-hook
50 – 500Hz
CMRR
dB
11
12
70
VCM = 60VRMS
Common mode overload level
off-hook
CMOL
NC
VRMS
250 300
0
50 – 60Hz
@2 Wire &
VOUT
dBrnC
dB
13 Idle channel noise off-hook
14 CMRR on-hook
12
40
55
50-500Hz
300
140
+5V supply
+3.3V supply
VRMS
15 CMOL on-hook
dBrnC
dB
16 Idle Noise on-hook
23
@VOUT
Power supply rejection ratio
At 2 Wire and Vout
Ripple 0.1V,
1kHz on VCC
PSRR
17
25
18
RL
dB
18 Return loss, 600R
35
35
300-3400Hz
18
21
60
40
300-3400Hz
500-2500Hz
200-1000Hz
1000-4000Hz
dB
dB
THL
19 Transhybrid loss, 600R
70
70
dB
dB
20 Metallic to longitudinal balance
Leakage current, Tip or Ring to
analog ground
ILA
mARMS
21
5
1000V ac
All AC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless
otherwise stated.
*Typical figures are at 25°C with nominal 5V supply and 25mA loop current unless otherwise stated. These figures
are for design aid only.
© Silver Telecom 2006
10
Ag2130
V1.4 September 2006
Data Sheet
LOW COST PSTN INTERFACE
Mechanical Specification and Pin Assignation
11.1 Ag2130S – SIL Package
11.0mm
61mm
Ag2130S
1.27mm
8.3mm
12.0mm
1
0.6 ± 0.05
3.0
2.54 ± 0.25
0.6 ± 0.05
12.7 ± 0.25
1.27mm
pin 1
Ring (B)
Tip (A)
Cathode
Anode
Gate
DMb
DMa
NC
VIN
VOUT
LSC
GND
VCC
NC
ZB
ZT2
ZT1
RS
VREF
VTR
Silver Telecom recommends the use of 2.54mm sockets, especially on prototype
and pre-production boards.
Recommended PCB hole diameter = 1.1 + 0.05mm
© Silver Telecom 2006
11
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