INFO Data Sheet L1503A EL1503 July 2001 FN7038.0 High P
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INFO Data Sheet L1503A
EL1503
July 2001 FN7038.0
High Power Differential Line Driver
EL1503 ADSL Line Driver contains wideband highvoltage drivers which ideally suited both ADSL HDSL2 applications. They supply 39.2VP-P signal into load while exhibiting very distortion. EL1503 also number power saving features. IADJ used maximum supply current pins used digitally vary supply current four modes. These modes include full power, power, terminate only power down. EL1503 uses current-feedback type amplifiers, which achieve high slew rate while consuming moderate power. They retain their frequency response over wide range externally gains. EL1503 operates ±12V supplies consumes only 12.5mA amplifier. device supplied standard form-factor 20-pin (0.300"), 16-pin thermal (0.150"), small footprint (4x5mm) 24-pin packages. Center pins each side 20-pin 16-pin packages used ground connections heat spreaders. package potential (<40°C/W) dissipates heat means thermal that soldered onto PCB. package options specified operation over full -40°C +85°C temperature range.
Features
High power ADSL driver 39.2VP-P differential output drive into 42.4VP-P differential output drive into Driver 2nd/3rd harmonics -66dBc/-72dBc 2VP-P into differential Supply current 12.5mA amplifier Supply current control Power saving modes Standard surface-mount packages Ultra-small package
Applications
ADSL line drivers HDSL2 line drivers Video distribution amplifiers
Ordering Information
PART NUMBER EL1503CL EL1503CL-T7 EL1503CL-T13 EL1503CM EL1503CM-T13 EL1503CS EL1503CS-T7 EL1503CS-T13 PACKAGE 24-Pin 24-Pin 24-Pin 20-Pin (0.300") 20-Pin (0.300") 16-Pin (0.150") 16-Pin (0.150") 16-Pin (0.150") TAPE REEL PKG. DWG. MDP0046 MDP0046 MDP0046 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027
CAUTION: These devices sensitive electrostatic discharge; follow proper Handling Procedures. 1-888-INTERSIL 1-888-468-3774 Intersil (and design) registered trademark Intersil Americas Inc. Copyright Intersil Americas Inc. 2003. Rights Reserved. Elantec registered trademark Elantec Semiconductor, Inc. other trademarks mentioned property their respective owners.
EL1503
Pinouts
EL1503 (24-PIN LPP) VIEW
VOUTB VOUTA VIN-A VIN-B
EL1503 [20-PIN (0.300")] VIEW
VIN-A VOUTA GND* GND* GND* GND* VIN+A POWER CONTROL LOGIC
VIN-B VOUTB GND* GND* GND* GND* VIN+B IADJ
VIN+B VIN+A IADJ THERMAL
*GND pins heat spreaders EL1503 [16-PIN (0.150")] VIEW
VIN-A VOUTA GND* GND* VIN+A POWER CONTROL LOGIC
VIN-B VOUTB
GND* GND* VIN+B IADJ
EL1503
Absolute Maximum Ratings 25°C)
Supply Voltage. 26.4V Voltage Ground -0.3V +26.4V Voltage Ground -26.4V 0.3V Input C0/C1 Ground Driver VIN+ Voltage Current into Input Output Current from Driver (Static) 100mA Operating Temperature Range .-40°C +85°C Storage Temperature Range .-60°C +150°C Operating Junction Temperature .-40°C +150°C Power Dissipation Curves
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied. IMPORTANT NOTE: parameters having Min/Max specifications guaranteed. Typical values information purposes only. Unless otherwise noted, tests specified temperature pulsed tests, therefore:
Electrical Specifications
PARAMETER SUPPLY CHARACTERISTICS IS+(Full Power) IS-(Full Power) IS+(Low Power) IS-(Low Power) IS+(Terminate) IS-(Terminate) IS+(Power Down) IS-(Power Down) IGND
±12V, 1.5k, IADJ 25°C. Amplifiers tested separately. DESCRIPTION CONDITIONS UNIT
Positive Supply Current Amplifier Negative Supply Current Amplifier Positive Supply Current Amplifier Negative Supply Current Amplifier Positive Supply Current Amplifier Negative Supply Current Amplifier Positive Supply Current Amplifier Negative Supply Current Amplifier Supply Current Amplifier
Outputs Outputs Outputs Outputs =5V, Outputs Outputs Outputs Outputs Outputs
-10.5 0.75 -0.5
12.5 -11.5 1.05 -0.25
11.5 0.07
INPUT CHARACTERISTICS IBIBROL IIH1 IIH0 Input Offset Voltage Mismatch Non-Inverting Input Bias Current Inverting Input Bias Current Mismatch Transimpedance Input Noise Voltage -Input Noise Current Input High Voltage Input Voltage Input High Current Input High Current Input Current C1or inputs inputs 0.75
EL1503
Electrical Specifications
PARAMETER OUTPUT CHARACTERISTICS VOUT
±12V, 1.5k, IADJ 25°C. Amplifiers tested separately. (Continued) DESCRIPTION CONDITIONS UNIT
Loaded Output Swing
±10.3 ±9.3
±10.6 ±9.8
IOUT
Linear Output Current Output Current
RL=10, f=100kHz, THD=-60dBc VOUT
DYNAMIC PERFORMANCE -3dB Bandwidth Harmonic Distortion 1MHz, 100, VOUT 2VP-P 1MHz, VOUT 2VP-P Harmonic Distortion 1MHz, 100, VOUT 2VP-P 1MHz, VOUT 2VP-P Slewrate VOUT from Measured 1100 V/µS
EL1503 Typical Performance Curves
±12V, 100, FULL POWER MODE RF=1.3k RF=1.3k RF=1.5k GAIN (dB) GAIN (dB) RF=1.82k RF=2.0k RF=2.43k RF=2.74k RF=1.5k RF=1.82k RF=2.0k RF=2.4k RF=2.74k 100K ±5V, 100. FULL POWER MODE
100K
100M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±12V, 100, POWER MODE RF=1.3k RF=1.5k GAIN (dB)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±5V, 100, POWER MODE RF=1.3k RF=1.5k RF=1.82k
GAIN (dB)
RF=1.82k
RF=2.0k RF=2.4k RF=2.74k
RF=2.0k RF=2.43k 100K RF=2.74k 100M 100K
Frequency (Hz)
100M
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±5V, 100, TERMINATE MODE RF=1.84k RF=2.0k RF=2.43k RF=2.74k GAIN (dB)
±12V, 100, TERMINATE MODE
GAIN (dB)
RF=1.82k
RF=2.0k
RF=2.43k RF=2.74k
100M
100K
100K
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE
EL1503 Typical Performance Curves
RF=1.3k RF=1.5k RF=1.82k GAIN (dB) RF=2.0k RF=2.4k RF=2.74k GAIN (dB) RF=2.0k RF=2.4k RF=2.74k
(Continued)
±5V, 100, FULL POWER MODE RF=1.5k RF=1.82k
±12V, 100, FULL POWER MODE
100K
100M
100K
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±12V, 100, POWER MODE RF=1.3k RF=1.5k RF=1.82k GAIN (dB) RF=2.0k RF=2.43k RF=2.74k
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±5V, 100, POWER MODE RF=1.5k RF=1.82k RF=2.0k GAIN (dB) RF=2.4k RF=2.74k
100K
100M
100K
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±12V, 100, TERMINATE MODE RF=1.82k RF=2.0k RF=2.43k GAIN (dB) RF=2.74k
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE ±5V, 100, TERMINATE MODE
RF=1.82k RF=2.0k GAIN (dB) RF=2.4k RF=2.74k
100K
100M
100K
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE
FIGURE DRIVER DIFFERENTIAL FREQUENCY RESPONSE
EL1503 Typical Performance Curves
(Continued)
(FULL
POWER)
(nV/Hz) (pA/Hz) (mA)
(FULL POWE
(2/3 POWER) (2/3
(TERMINATE (TERMINATE)
FREQUENCY (Hz)
100K
FIGURE DRIVER INPUT VOLTAGE FEEDBACK CURRENT NOISE FREQUENCY
FIGURE SUPPLY CURRENT SUPPLY VOLTAGE
-100 SUPPLY REJECTION (dB)
-100 RIGHT DRIVER
SUPPLY REJECTION (dB)
LEFT DRIVER RIGHT DRIVER
LEFT LEFT DRIVER DRIVE
100K
FREQUENCY (Hz)
100M
100K
FREQUENCY (Hz)
100M
FIGURE POSITIVE SUPPLY REJECTION FREQUENCY
FIGURE NEGATIVE SUPPLY REJECTION FREQUENCY
±12V, AV=1, RF=1.5K TERMINATE
±5V, AV=1, RF=1.5K
OUTPUT IMPEDANCE
OUTPUT IMPEDANCE
TERMINATE
POWER
POWER
FULL POWER
FULL POWER
100K
FREQUENCY (Hz)
100M
100K
FREQUENCY (Hz)
100M
FIGURE OUTPUT IMPEDANCE FREQUENCY
FIGURE OUTPUT IMPEDANCE FREQUENCY
EL1503 Typical Performance Curves
(Continued)
VS=±5V, AV=5, RL=100, FC=1MHz, FULL POWER
VS=±12V, AV=5, RL=100, FC=1MHz, FULL POWER
(dB)
(dB)
VOP-P
VOP-P
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
VS=±5V, AV=5, RL=100, FC=1MHz, POWER (dB)
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
VS=±5V, AV=5, RL=100, FC=1MHz, POWER
(dB)
VOP-P
VOP-P
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
VS=±12V, AV=5, RL=100, FC=1MHz (dB) VOP-P FULL POWER POWER
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
VS=±5V, AV=5, RL=100, FC=1MHz
(dB)
FULL POWER
POWER VOP-P
FIGURE DIFFERENTIAL TOTAL HARMONIC DISTORTION OUTPUT AMPLITUDE
FIGURE DIFFERENTIAL TOTAL HARMONIC DISTORTION OUTPUT AMPLITUDE
EL1503 Typical Performance Curves
(dB) VOP-P VOP-P (dB)
(Continued)
±5V, 100, 1MHz, FULL POWER
±12V, 100, 1MHz, FULL POWER
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
±12V, 100, 1MHz, POWER (dB) (dB) VOP-P
±5V, 100, 1MHz, POWER
VOP-P
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
FIGURE DIFFERENTIAL HARMONIC DISTORTION OUTPUT AMPLITUDE
±12V, 100, 1MHz (dBc) VOP-P FULL POWER (dBc)
±5V, 100, 1MHz
POWER
POWER
FULL POWER VOP-P
FIGURE DIFFERENTIAL TOTAL HARMONIC DISTORTION OUTPUT AMPLITUDE
FIGURE DIFFERENTIAL TOTAL HARMONIC DISTORTION OUTPUT AMPLITUDE
EL1503 Typical Performance Curves
1.82k
(Continued)
1.82k
FULL
TERMIN
(MHz)
POWER MODE
PEAKING (dB)
FULL POWER
MODE TERMINATE
MODE
FIGURE DIFFERENTIAL BANDWIDTH SUPPLY VOLTAGE
±12V, RSET
FIGURE DIFFERENTIAL PEAKING SUPPLY VOLTAGE
±5V, RSET
(FULL POWER) (FULL POWER)
(FULL POWER) (FULL POWER)
(mA)
(mA)
(2/3 POWER) (2/3POWER)
(2/3 POWER) (2/3 POWER)
(TERMINATE) (TERMINATE)
(TERMINATE)
RSET
RSET
FIGURE RSET
±12V
(2/3 RMIN INAT
FIGURE RSET
(mA)
(mA)
S2/3 STE) MINA (TER INAT
ISET (µA)
ISET (µA)
FIGURE ISET
FIGURE ISET
EL1503 Typical Performance Curves
(Continued)
24-PIN POWER DISSIPATION THERMAL RESISTANCE. USING JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY (4-LAYER) TEST BOARD, EXPOSED DIEPAD SOLDERED JESD51-5
POWER DISSIPATION 43°C/W 53°C/W 80°C/W 30°C/W POWER DISSIPATION
2.703W
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE POWER DISSIPATION AMBIENT TEMPERATURE VARIOUS MOUNTED
FIGURE POWER DISSIPATION AMBIENT TEMPERATURE
16-PIN POWER DISSIPATION THERMAL RESISTANCE. USING ELANTEC EL1503CS DEMOBOARD, 2"X2" (4-LAYER) DEMOBOARD WITH HEATSINK INTERNAL GROUND PHASE POWER DISSIPATION
47°C/W
AMBIENT TEMPERATURE (°C)
FIGURE POWER DISSIPATION AMBIENT TEMPERATURE
EL1503 Test Circuit
VIN-A VOUTA VIN+A VIN-B VOUTB VIN+B IADJ
1/2W LEFT DRIVER 1.5k
1/2W 1.5k RIGHT DRIVER
0.1µF TANTALUM LEFT DRIVER
RSET 0.1µF TANTALUM
RIGHT DRIVER
EL1503 Descriptions
16-PIN (0.150") 20-PIN (0.300") 24-PIN NAME VIN-A FUNCTION Channel Inverting Input CIRCUIT
CIRCUIT VOUTA VSGND VIN+A Channel Output Negative Supply Ground Connection Channel Non-Inverting Input
(Reference Circuit
CIRCUIT Current Control
6.7V
CIRCUIT Current Control Connected (Reference Circuit
IADJ
Supply Current Control
CIRCUIT VIN+B VOUTB VIN-B Channel Non-Inverting Input Ground Connection Positive Supply Channel Output Channel Inverting Input (Reference Circuit (Reference Circuit (Reference Circuit
EL1503 Applications Information
EL1503 consists high-power line driver amplifiers that connected full duplex differential line transmission. amplifiers designed used with signals 4MHz produce distortion levels. typical interface circuit shown Figure below.
DRIVER INPUT
inductive sources. More than 100nH source impedance cause ringing even oscillations. This inductance equivalent about unshielded wiring, unterminated transmission line. Normal high-frequency construction obviates such problem.
Power Supplies Dissipation
high power drive capability EL1503, much attention needs paid power dissipation. power that needs dissipated EL1503 main contributors. first quiescent current dissipation. second dissipation output stage. quiescent power EL1503 constant with varying outputs. reality, 12.5mA needed power each driver converted output current. Therefore, equation below should subtract average output current, 7mA, whichever lowest. We'll call this term Therefore, determine quiescent current with equation:
Dquiescent
ROUT
LINE
ZLINE
ROUT
LINE
RECEIVE
RECEIVE AMPLIFIERS
RECEIVE
where:
FIGURE TYPICAL LINE INTERFACE CONNECTION
supply voltage (VS+ VS-) maximum quiescent supply current (IS+ IS-) lesser (generally 7mA) dissipation output stage main contributors. Firstly, have average voltage drop across output transistor secondly, average output current. minimal power dissipation, user should select supply voltage line transformer ratio accordingly. supply voltage should kept possible, while transformer ratio should selected that peak voltage required from EL1503 close maximum available output swing. There trade however with selection transformer ratio. ratio increased, receive signal available receivers reduced. Once user selected transformer ratio, dissipation output stages selected with following equation:
Dtransistors
amplifiers wired with positive gain other negative gain configuration generate differential output single-ended input. They will exhibit very similar frequency responses gains three greater thus generate very small common-mode outputs over frequency, gains drivers RF's need adjusted give similar frequency responses. positive-gain driver will generally exhibit more bandwidth peaking than negative-gain driver. differential signal available drive amplifiers, they wired
FIGURE DRIVERS WIRED DIFFERENTIAL INPUT
Each amplifier identical positive gain connections, optimum common-mode rejection occurs. Further, input errors duplicated create common-mode rather than differential line errors.
where: supply voltage (VS+ VS-) average output voltage channel average output current channel overall power dissipation (PDISS) obtained adding PDquiescent PDtransistor.
Input Connections
EL1503 amplifiers somewhat sensitive source impedance. particular, they like being driven
EL1503
Then, requirement needs calculated. This done using equation:
JUNCT DISS
where: TJUNCT maximum temperature (150°C) TAMB maximum ambient temperature PDISS dissipation calculated above junction ambient thermal resistance package when mounted This value then used calculate area copper needed board dissipate power. graph below show various SO20 mounted different copper foil areas.
THERMAL RESISTANCE 20-Pin (0.300") EL1503 BOARD COPPER AREA MOUNTED DEVICE (°C/W) Note: 2oz. COPPER USED FOIL ONLY-WITH SOLDER MASK FOIL-WITH 0.45IN2 BOTTOM FOIL WITH MANY FEEDTHROUGHS
technique, several aspects board layout should noted. First, heat should shunted internal copper layers board backside foil, since feedthroughs fiberglass board very thermally conductive. obtain best thermal resistance mounted part, topside copper ground plane should have much area possible thick practical. possible, solder mask should away from EL1503 improve thermal resistance. Finally, metal heatsinks placed against board close part draw heat toward chassis.
Output Loading
While drive amplifiers output excess 500mA transiently, internal metallization designed carry more than 100mA steady current there current-limit mechanism. This allows safely driving sinusoidal currents 100mA, 200mA. This current more than that required drive line impedances large output levels, output short circuits cannot tolerated. series output resistor will usually limit currents safe values event line shorts. Driving lines with series resistor serious hazard. amplifiers sensitive capacitive loading. More than 25pF will cause peaking frequency response. same true badly terminated lines connected without series matching resistor.
FOIL ONLY-NO SOLDER MASK
Power Supplies
power supplies should well bypassed close EL1503. 3.3µF tantalum capacitor each supply works well. Since load currents differential, they should travel through board copper ground loops that return amplifier inputs. class output stage design, these currents have heavy harmonic content. ground terminal positive negative bypass capacitors connected each other directly then returned circuit ground, such ground loops will occur. This scheme employed layout EL1503 demonstration board, documentation obtained from factory.
FIGURE AREA CIRCUIT BOARD HEAT SINK (IN2)
separate application note details 24-pin design considerations.
Single Supply Operation
EL1503 also powered from single supply voltage. When operating this mode, pins still connected directly GND. calculate power dissipation, equations previous section should used, with equal half supply rail.
Feedback Resistor Value
bandwidth peaking amplifiers varies with supply voltage somewhat with gain settings. feedback resistor values adjusted produce optimal frequency response. Here series resistor values that produce optimal driver frequency. bandwidth peaking amplifiers varies with supply voltage somewhat with gain settings. feedback resistor values adjusted produce optimal frequency response. Here series resistor values that
EL1503 Design
separate application note details 24-pin design considerations. power packages leads) designed that heat conducted away from device efficient manner. disperse this heat, center leads side lead side lead) internally connected mounting platform die. Heat flows through leads into circuit board copper, then spreads convects air. Thus, ground plane component side board becomes heatsink. This proven very effective
EL1503
produce optimal driver frequency response (1dB peaking) different supply voltages gains:
TABLE OPTIMUM DRIVER FEEDBACK RESISTOR VARIOUS GAINS SUPPLY VOLTAGES DRIVER VOLTAGE GAIN SUPPLY VOLTAGE ±12V 2.7K 2.2K 2.2K 2.0K 2.0K 2.0K
Another method controlling power consumption EL1503 connect resistor from IADJ ground. When this grounded (the normal state), supply current channel specifications table page When resistor inserted, supply current scaled according RSET" graphs page Performance Curves section. Both methods power control used simultaneously. this case, positive negative supply currents (per amp) given equations below:
12.5mA 12.5mA 12.5mA 12.5mA
Power Control Function
EL1503 contains forms power control operation. digital inputs, used control supply current EL1503 drive amplifiers. supply current reduced, EL1503 will start exhibit slightly higher levels distortion frequency response will limited. power modes EL1503 shown table below:
TABLE POWER MODES EL1503 OPERATION Full Power Mode Power Mode Terminate only mode Power down
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