AG2410

Silver TELECOM TIP1 RING1 Ag2410 FEATURES V1-4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK • 4 highly featured Trunks (COIC, FXO) in a single Module. • Magnetic isolation providing high common mode rejection (CMRR) for use in un-grounded systems. • Highly integrated with on board loop switch and integral diode bridge. • Loop Start operation with On-Hook reception and reversal detect (for Caller Line ID and remote metering). • Ringing detection detection. and Loop Current TRUNK 1 VIN1 VOU T 1 TIP2 RING2 TRUNK 2 VIN2 VOU T 2 TIP3 RING3 TRUNK 3 VIN3 VOU T 3 TIP4 RING4 TRUNK 4 VIN4 VOU T 4 • Meets requirements of EN60950/UL1950, and FCC Pt68. • Minimum number of external components, single +5V system side power supply. • Programmable d.c. mask. • Silver Telecom “design-in” assistance. Cont rol and Super vision DESCRIPTION The Silver Telecom Ag2410 comprises four individual Trunk Circuits in a single Module. The combination of features and packaging offers extremely efficient use of board area, saving significantly on system size and cost. The Ag2410 has been designed to work with 600R line impedance and meets international safety and regulatory requirements. In addition to the features shown above the Ag2410 allows flexible programming of many functions, including the dc voltage mask. Each circuit requires a minimum of external components and has been specified for ease of use, to reduce time to market. The system interface has been designed for direct connection to popular Codecs of both the audio and signalling connections. The Ag2410 is designed for applications where there is a high level of common mode interference, such as PABX, long loop applications and systems without a ground. © Silver Telecom 2005 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK Ag2410 Ag QUAD TRUNK Silver TELECOM Figure 1: Packaging Format Ordering Information Ag2410 High Performance Quad Trunk VCC DMa1 DMb1 GN D TRUNK 1 Li ne Te rmina tion & Loo p Swi tc h Powe r Ma nage me nt 2- 4 W ire Conve rte r Zb1 V ref1 Vout1 Vin1 RS 1 LC 1 LSC 1 Tip1 Rin g1 S upe rvision DMa2 DMb2 TRUNK 2 Zb2 V ref2 Vout2 Vin2 RS 2 Tip2 Rin g2 LC 2 LS C 2 DMa3 DMb3 TRUNK 3 Zb3 V ref3 Vout3 Vin3 RS 3 Tip3 Rin g3 LC 3 LS C 3 DMa4 DMb4 TRUNK 4 Zb4 V ref4 V out4 Vin4 RS 4 LC 4 LSC 4 Tip4 Rin g4 Figure 2: Block Diagram © Silver Telecom 2005 Page 2 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK 1.0 Pin Description Pin # A 1 2 3 4 5 6 7 71 72 73 74 75 76 77 78 79 80 81 B 8 9 10 11 12 13 14 57 58 59 60 61 62 63 64 65 66 67 C 15 16 17 18 19 20 21 43 44 45 46 47 48 49 50 51 52 53 D 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 Name TIP (A) Description Tip. Connects to the subscriber line Tip. RING (B) Ring. Connects to the subscriber line Ring. nc nc DMa DMb nc GND VCC nc nc Zb VIN nc VOUT nc LC LSC No connect. This pin can be left open circuit. No connect. This pin can be left open circuit. DC Mask a. A resistor is connected between this pin and DMb to adjust the d.c. characteristics of the termination. DC Mask b. A resistor is connected between this pin and DMa to adjust the d.c. characteristics of the termination. No connect. This pin can be left open circuit. Analog ground. Normally connected to system ground. All four pins must be connected to Analog Ground. +5V supply. All four pins must be connected to +5V. No connect. This pin can be left open circuit. No connect. This pin can be left open circuit. Balance network. The network balance matching components are connected between this pin, VIN and GND. Audio In. This is the analog input signal from the Codec (which is output on Tip and Ring). Connected via a 100nF capacitor. No connect. This pin can be left open circuit. Audio Out. This is the analog output signal (from Tip and Ring) to the Codec. Connected via a 100nF capacitor. No connect. This pin can be left open circuit. Loop current. A logic 1 Indicates that loop current is flowing. Loop switch control. Applying a logic 1 closes the integral loop switch. Ringing signal. A logic 0 indicates the presence of ringing voltage on the telephone line. Toggles at twice the ringing frequency. Also RS indicates whether the line polarity has reversed with a pulse. No connect. This pin can be left open circuit. Analog reference. Bias voltage for analog circuitry. Must be de-coupled with 100uF. Page 3 82 68 54 40 RS 83 84 69 70 55 56 41 42 nc VREF © Silver Telecom 2005 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK output drive pins of a Codec or from a micro controller device. Once the Loop Switch has been closed confirmation that loop current is flowing is provided by the LC pin. This can be used for fault detection and for call clear detection. 2.0 Line Interfacing The line interfaces on the Ag2410 provide a flexible and robust interface to the telephone line. They are 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. 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 Ag2410 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 twice the ringing frequency. A capacitor to ground can also be added if ringing cadence is needed rather than the ringing frequency. The sensitivity to ringing is set internally to 20Vrms. Any equipment terminating a telephone line must present the correct d.c. resistance to the line. This ensures that the correct current flows to be able to detect the off hook condition, 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 Ag2410 has been designed to meet the requirements of many network operators. This is done by making the d.c. characteristic adjustable. These are controlled by connecting the DM pins on the line side of the circuit. Table 1 shows how these are connected. Table 1 Set Up of the DM Pins Market DMa DMb North America Connect together (EIA 464, Resistive) through 270K resistor Europe (CTR21) Far East 2.2 Connect together through 470K resistor Connect together through 270K resistor 2.2.3 Reversal Detect The ringing detect circuit will also detect DC polarity reversal at Tip/Ring. Since this is AC coupled only a pulse output (15mS min.) is given at the RS output at the instant of reversal. An example of this type of signalling is in Caller Line ID in the United Kingdom, where a battery polarity reversal precedes the transmission of data before the ringing signal is applied to the line. There must be greater than 30V across Tip and Ring for reversal detect to function correctly. This means that there is no detection when off-hook. Signalling and Loop Status. The Ag2410 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. 3.0 The 2-4 Wire (Hybrid) Conversion. Each circuit on the Ag2410 module transmits and receives balanced 2-wire analog signals at the Tip and Ring connections. These are converted to a ground referenced output at VOUT 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. 2.2.1 The On-Board Loop Switch The Ag2410 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 Ag2410 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 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 © Silver Telecom 2005 3.1 Transmit and Receive Gain. The gain in both the transmit and receive directions is set at 0dB. Any gain adjustments can be made using the Codec functionality. This is either by hardware or software depending upon the Codec used. Page 4 V1.4 February 2005 Data Sheet Network Balance Impedance 600 Ω AT&T compromise Other Ag2410 HIGH PERFORMANCE QUAD TRUNK Zbal1 51K 33K Zbal2 36K 33K Zbal3 0Ω 15K C3 47pF 2700pF Notes Far East, Middle East North America Program impedance using “intelligent” codec (e.g. SICOFI or QSLAC) Example 1 2 2-wire Impedance 600Ω 600Ω 3 Other 51K 36K 0Ω 47pF Table 2: Line and Network Balance Impedance Examples 3.2 The 2 Wire Impedance The input impedance, ZIN, of each circuit is set internally to 600R. To provide other impedances, use a codec where the internal filter characteristics can be programmed to provide the correct matching. In order to generate the filter coefficients a model of the Ag2410 must be used. This file, in .CIR format is available on request from Silver Telecom or one of our representatives. 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 can be done by programming of the Codec, using the .CIR file, or it can be done by hardware components. If the hardware technique is used a network must be connected between Zb and Vin. Common examples are shown in Table 2. 3.4 On-Hook Reception The need to provide the facility for data exchange +5V For 600Ω application: R1 = 270K Zbal1 = 51K Zbal2 = 36K Zbal3 = 0Ω C1, C2, C4 = 100nF C3 = 47pF C5 = 10uF, 6.3V C6 – 100uF, 6.3V PTC = TR600-150 Thyristor = TVB270SA Zbal2 C5 GND DMa R1 + Zbal3 C3 Zbal1 C4 VCC Zb V GND C1 C2 DMb PTC IN Ag2410 (1 channel) VOUT Codec TIP RS LC LSC Thyristor Silver TELECOM RING GND VREF + Protection Network C6 GND Figure 3: A Single Channel Showing Impedance and Protection Components © Silver Telecom 2005 Page 5 V1.4 February 2005 Data Sheet On-Hook is becoming increasingly common, whether for Caller Line I.D. or for telemetry purposes. The Ag2410 can receive signals On-Hook, presenting a high impedance to the line, i.e. while drawing a very small current (5µA approx) from the line. Ag2410 HIGH PERFORMANCE QUAD TRUNK by the Ag2410 the device protection is dependent upon regulatory standards in the market in which the equipment is deployed. Some examples are given below, but these are not exhaustive. 3.5 Ringer Load Networks 4.1 FCC Pt 68 Requirements. 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 dummy ringer is integral to the Ag2410, and is suitable for CTR21 (Europe), USA and Asia. For other dummy ringer requirements not covered in this datasheet, please contact Silver Telecom, or their local representative. 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 requires a 130V AC varistor (which clamps at 300V which is the 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 may be seen in the For 600R line and balance impe dance : ( as required by the QSLAC) R1- 4 = 270k R5- R8 = 51k R9- 12 = 0Ω R13- 16 = 36k C1- 8, C13 = 100nF C9- 12 = 47pF C14 = 10uF C15- C18 = 100uF 4.0 Device Protection. As with many of the requirements which must be met Pr ote ct io n cir cuit de pen ds upon pre cise application DM a1 R1 DM b1 TIP1 RING1 Pr ote ction Cir cuit C15 0V + V REF1 Zb1 R13 R9 R5 C9 0V C1 C2 VOUT1 VIN1 CD11 C31 C10 0V DM a2 R2 DM b2 TIP2 RING2 Ag2410 Qua d Trunk Circuit V IN1 V OUT1 RS1 LSC1 Zb2 R14 R10 R6 C3 C4 V IN2 V OUT2 RS2 LSC2 Zb3 R11 R15 AM D QSLAC CODE C VOUT 2 Pr ote ction Cir cuit C16 0V R3 + V REF2 VIN2 CD12 C32 C11 0V Proce ssor Inte rfa ce DM a3 DM b3 TIP3 RING3 V IN3 R7 C5 C6 VOUT3 VIN3 CD13 C33 C12 0V Pr ote ction Cir cuit C17 0V + V REF3 Silver TE L EC OM V OUT3 RS3 LSC3 Zb4 R16 R12 R6 DM a4 R4 DM b4 TIP4 V IN4 RING4 Pr ote ction Cir cuit C18 0V + V REF4 C7 C8 VOUT4 VIN4 CD14 C34 GND C13 + C1 C14 V CC V OUT4 RS4 LSC4 5V 0V Figure 4: A 4 Channel Circuit Using the AMD QSLAC © Silver Telecom 2005 Page 6 V1.4 February 2005 Data Sheet field) 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. Ag2410 HIGH PERFORMANCE QUAD TRUNK 5.0 Regulatory Standards 4.2 UL1459 and UL1950 Protection. There are some aspects of international standards which are not fully met by the Ag2410. These are shown below. It is Silver Telecom’s policy to bring to the attention of customers all known exceptions. The Ag2410 meets the requirements of EN60950 (1992) paragraph 6.2.1.2 for all countries except Norway and Sweden. Please contact Silver Telecom if the product is needed for Norway or Sweden. User/Network safety from mains power voltage (UL1950/EN60950 paragraphs 2.1.1 and 6.2.1.4) must be provided externally by a power supply with reinforced or double insulation. To meet the UL1459 and UL1950 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. 6.0 Layout Signal tracks should be kept as short as possible. Special attention should be paid to Dma, DMb and Zb, as these are sensitive nodes. 4.3 Other Standards. For general mains cross protection (CCITT K21), a 47Ω 2W wire wound surge resistor and a PTC thermistor are sufficient. A suitable device is the Walsin PTD3A350H26. (Metallic protection with a single device is all that is required as the Ag2410 will withstand longitudinal voltages up to 1000Vrms to ground without additional protection). © Silver Telecom 2005 Page 7 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK 7.0 Absolute Maximum Ratings* Parameter Sym VCC VTR -0.3 PTRU NK All Voltages are with respect to ground unless otherwise stated. Min -0.3 Max 6.0 300 6.0 0.75 3.0 100 185 Units V V V W W mA mA O 1 DC supply voltage 2 DC battery voltage present between Tip and Ring (on-hook) 3 Maximum voltage on programmable pin, LSC 4 Maximum power dissipation per trunk @ 25°C 5 Maximum power dissipation per module @ 25°C 6 Maximum loop current (continuous) 7 Maximum ring trip current (for 1 second) 8 Storage Temperature PTOT ILOOP IRING TS -40 +100 C *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* Parameter Symbol VCC VTIP VRING ILOOP TOP Min 4.75 0 0 0 0 Typ 5.0 0 -48 25 25 Max 5.25 -120 -120 85 70 Units V V V mA O All Voltages are with respect to ground unless otherwise stated. 1 2 3 4 DC supply voltage DC battery voltage on Tip and Ring (on-hook) DC loop current Operating Temperature C *Typical figures are at 25°C with nominal +5V supplies and are for design use only. © Silver Telecom 2005 Page 8 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK 9.0 DC Electrical Characteristics. Characteristic 1 2 3 4 Supply current (per trunk), on-hook3 Power consumption, on-hook Loop current range Status outputs, RS, LC Output low voltage Output high voltage Control input, LSC Input low voltage Input high voltage Control input, LSC Input low current Input high current Off-hook DC voltage Leakage current, Tip and Ring to analog ground Leakage current on-hook, Tip to Ring ILA ILTR Sym ICC PTOT ILOOP VOL VOH VIL VIH IIL IIH 5.7 10 10 14.0 Min Typ2 Max 4.0 20.0 6.0 80.0 85.0 0.4 3.5 0.3 4.0 10 2.0 Units Test Comments1 mA mW mA V V V V µA mA V µA µA ILOOP = 20mA DMa-DMb=270k 100VDC 100VDC @ 50µA @ -50µA 5 6 7 8 9 1 2 3 All DC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless otherwise stated. For test circuit details please contact Silver Telecom Typical figures are at 25°C with nominal +5V supply and 25mA loop current, unless otherwise stated. These figures are for design aid only. Operating currents are dependant on the users application. © Silver Telecom 2005 Page 9 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK Sym Min Typ* Max Units Test Comments1 10.0 AC Electrical Characteristics. Characteristic 1 2 3 4 5 6 7 8 9 10 11 12 Ringing voltage: detect Ringing voltage: no detect Ringing frequency Input Impedance at VIN Output impedance at Vout Absolute voltage gain, 2 Wire to VOUT Absolute voltage gain, VIN to 2 Wire On-hook gain, 2 Wire to VOUT Relative gain, referenced to 1kHz. 2Wire - Vout, Vin - 2Wire Total harmonic distortion @ 2Wire and Vout Overload distortion @2 Wire and Vout Common mode rejection ratio Common mode overload level Idle channel noise off-hook CMRR on-hook CMOL on-hook Idle channel noise Power supply rejection ratio at 2 Wire and Vout Return loss Transhybrid loss Metallic to longitudinal balance Polarity reversal detect pulse Crosstalk Leakage current, Tip or Ring to analog ground VRD FR 28 15 20 20 100 14 68 10 VRMS Hz kΩ dB dB dB dB % % dB 300 - 3400 Hz @0dBm, 1kHz @+3dBm, 1kHz 50 – 500Hz VCM = 60VRMS 50 – 60Hz @2 Wire & VOUT 50-500Hz Off-hook Off-Hook -0.5 -0.5 -1.5 -0.5 THD OD CMRR CMOL NC 40 70 0.1 0.5 75 250 0 55 70 40 NC PSRR RL THL 25 18 18 21 60 40 5 12.0 +0.5 +0.5 -0.5 +0.5 1.0 5.0 300 12 VRMS dBrnC dB Vrms Vrms 13 14 15 16 17 18 19 20 21 22 23 +5V supply +3.3 supply @2 Wire & dBrnC VOUT dB dB dB dB Ripple 0.1V, 1kHz on VCC 300-3400Hz 300 - 3400Hz 500 - 2500Hz 200-1000Hz 1000-4000Hz >30V at T/R 1kHz, 0dBm 70 70 30 -70 dB mS dB 5 ILA mARMS 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. 1 For test circuit details please contact Silver Telecom. © Silver Telecom 2005 Page 10 V1.4 February 2005 Data Sheet Ag2410 HIGH PERFORMANCE QUAD TRUNK 7 5.0 mm 5.0 mm 3.5mm 11.0 Mechanical Specification and Pin Assignation 1 7 28 Bottom Vie w 42. 0m m Cir cuit A Cir cuit B Cir cuit C Cir cuit D 5 4.0 mm Not To Scale 2.0mm 84 83 72 71 58 57 44 43 30 29 5.0 mm 11. 00 m m 2.0mm 6.0mm NC LS C NC NC Zb NC GND 83 84 71 72 V ref RS LC V OU T V IN NC V CC Pi n Names Bottom Vie w Cir cuit A 1 7 Tip (A ) Ring ( B) NC NC DM a DM b NC GND NC Zb NC NC LS C NC 71 72 83 84 V CC NC V IN V OU T LC RS V ref Pi n Names Top Vi ew Cir cuit A 7 1 NC DM b DM a NC NC Ring ( B) Tip (A ) S ilver Tel ec om re com mends t he use of 2m m socke ts, e spec ia lly on pr ototype a nd pr e- produc tion boa rds . Re com mende d PC B hole diame te r = 0.9 ± 0.05 mm © Silver Telecom 2005 Page 11