AD815运放

FUNCTIONAL BLOCK DIAGRAM 15-Lead Through-Hole SIP (Y) and Surface-Mount DDPAK(VR) NC NC NC +IN1 –IN1 OUT1 –VS +VS OUT2 –IN2 +IN2 NC NC NC NC 1 2 3 4 5 6 7 8 9 15 11 12 13 14 10 AD815 TAB IS +VS NC = NO CONNECT REFER TO PAGE 3 FOR 24-LEAD SOIC PACKAGE REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a High Output CurrentDifferential Driver AD815 PRODUCT DESCRIPTION The AD815 consists of two high speed amplifiers capable of supplying a minimum of 500 mA. They are typically configured as a differential driver enabling an output signal of 40 V p-p on – 15 V supplies. This can be increased further with the use of a FEATURES Flexible Configuration Differential Input and Output Driver or Two Single-Ended Drivers High Output Power Power Package 26 dBm Differential Line Drive for ADSL Application 40 V p-p Differential Output Voltage, RL = 50 V 500 mA Minimum Output Drive/Amp, RL = 5 V Thermally Enhanced SOIC 400 mA Minimum Output Drive/Amp, RL = 10 V Low Distortion –66 dB @ 1 MHz THD, RL = 200 V, VOUT = 40 V p-p 0.05% and 0.458 Differential Gain and Phase, RL = 25 V (6 Back-Terminated Video Loads) High Speed 120 MHz Bandwidth (–3 dB) 900 V/ms Differential Slew Rate 70 ns Settling Time to 0.1% Thermal Shutdown APPLICATIONS ADSL, HDSL and VDSL Line Interface Driver Coil or Transformer Driver CRT Convergence and Astigmatism Adjustment Video Distribution Amp Twisted Pair Cable Driver FREQUENCY – Hz –40 –50 –110 100 10M1k TO TA L HA RM O NI C DI ST O RT IO N – dB c 10k 100k 1M –60 –70 –80 –90 –100 VS = 615V G = +10 VOUT = 40V p-p RL = 50V (DIFFERENTIAL) RL = 200V (DIFFERENTIAL) Total Harmonic Distortion vs. Frequency AMP1 +15V –15V RL 120V110V 499V VOUT = 40Vp-p VIN = 4Vp-p 1/2 AD815 1/2 AD815 G = +10 100V 100V AMP2 VD = 40Vp-p 1:2 TRANSFORMER R1 = 15V R2 = 15V 499V Subscriber Line Differential Driver coupling transformer with a greater than 1:1 turns ratio. The low harmonic distortion of –66 dB @ 1 MHz into 200 W combined with the wide bandwidth and high current drive make the differential driver ideal for communication applications such as subscriber line interfaces for ADSL, HDSL and VDSL. The AD815 differential slew rate of 900 V/m s and high load drive are suitable for fast dynamic control of coils or transformers, and the video performance of 0.05% and 0.45° differential gain and phase into a load of 25 W enable up to 12 back-terminated loads to be driven. Three package styles are available, and all work over the industrial temperature range (–40 ° C to +85 ° C). Maximum output power is achieved with the power package available for through-hole mounting (Y) and surface-mounting (VR). The 24-lead SOIC (RB) is capable of driving 26 dBm for full rate ADSL with proper heat sinking. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 AD815–SPECIFICATIONS AD815A Model Conditions VS Min Typ Max Units DYNAMIC PERFORMANCE Small Signal Bandwidth (–3 dB) G = +1 – 15 100 120 MHz G = +1 – 5 90 110 MHz Bandwidth (0.1 dB) G = +2 – 15 40 MHz G = +2 – 5 10 MHz Differential Slew Rate VOUT = 20 V p-p, G = +2 – 15 800 900 V/ m s Settling Time to 0.1% 10 V Step, G = +2 – 15 70 ns NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion f = 1 MHz, RLOAD = 200 W , VOUT = 40 V p-p – 15 –66 dBc Input Voltage Noise f = 10 kHz, G = +2 (Single Ended) – 5, – 15 1.85 nV/ Ö Hz Input Current Noise (+IIN) f = 10 kHz, G = +2 – 5, – 15 1.8 pA/ Ö Hz Input Current Noise (–IIN) f = 10 kHz, G = +2 – 5, – 15 19 pA/ Ö Hz Differential Gain Error NTSC, G = +2, RLOAD = 25 W – 15 0.05 % Differential Phase Error NTSC, G = +2, RLOAD = 25 W – 15 0.45 Degrees DC PERFORMANCE Input Offset Voltage – 5 5 8 mV – 15 10 15 mV TMIN – TMAX 30 mV Input Offset Voltage Drift 20 m V/° C Differential Offset Voltage – 5 0.5 2 mV – 15 0.5 4 mV TMIN – TMAX 5 mV Differential Offset Voltage Drift 10 m V/° C –Input Bias Current – 5, – 15 10 90 m A TMIN – TMAX 150 m A +Input Bias Current – 5, – 15 2 5 m A TMIN – TMAX 5 m A Differential Input Bias Current – 5, – 15 10 75 m A TMIN – TMAX 100 m A Open-Loop Transresistance – 5, – 15 1.0 5.0 M W TMIN – TMAX 0.5 M W INPUT CHARACTERISTICS Differential Input Resistance +Input – 15 7 M W –Input 15 W Differential Input Capacitance – 15 1.4 pF Input Common-Mode Voltage Range – 15 13.5 – V – 5 3.5 – V Common-Mode Rejection Ratio TMIN – TMAX – 5, – 15 57 65 dB Differential Common-Mode Rejection Ratio TMIN – TMAX – 5, – 15 80 100 dB OUTPUT CHARACTERISTICS Voltage Swing Single Ended, RLOAD = 25 W – 15 11.0 11.7 – V – 5 1.1 1.8 – V Differential, RLOAD = 50 W – 15 21 23 – V TMIN – TMAX – 15 22.5 24.5 – V Output Current1, 2 VR, Y RLOAD = 5 W – 15 500 750 mA – 5 350 400 mA RB-24 RLOAD = 10 W – 15 400 500 mA Short Circuit Current – 15 1.0 A Output Resistance – 15 13 W MATCHING CHARACTERISTICS Crosstalk f = 1 MHz – 15 –65 dB POWER SUPPLY Operating Range3 TMIN – TMAX – 18 V Quiescent Current – 5 23 30 mA – 15 30 40 mA TMIN – TMAX – 5 40 mA – 15 55 mA Power Supply Rejection Ratio TMIN – TMAX – 5, – 15 –55 –66 dB NOTES 1Output current is limited in the 24-lead SOIC package to the maximum power dissipation. See absolute maximum ratings and derating curves. 2See Figure 12 for bandwidth, gain, output drive recommended operation range. 3Observe derating curves for maximum junction temperature. Specifications subject to change without notice. REV. B–2– (@ TA = +258C, VS = 615 V dc, RFB = 1 kV and RLOAD = 100 V unless otherwise noted) AD815 REV. B –3– MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the AD815 is limited by the associated rise in junction temperature. The maximum safe junction temperature for the plastic encapsulated parts is determined by the glass transition temperature of the plastic, about 150 ° C. Exceeding this limit temporarily may cause a shift in parametric performance due to a change in the stresses exerted on the die by the package. Exceeding a junction temperature of 175 ° C for an extended period can result in device failure. The AD815 has thermal shutdown protection, which guarantees that the maximum junction temperature of the die remains below a safe level, even when the output is shorted to ground. Shorting the output to either power supply will result in device failure. To ensure proper operation, it is important to observe the derating curves and refer to the section on power considerations. It must also be noted that in high (noninverting) gain configurations (with low values of gain resistor), a high level of input overdrive can result in a large input error current, which may result in a significant power dissipation in the input stage. This power must be included when computing the junction temperature rise due to total internal power. AMBIENT TEMPERATURE – 8C 14 7 4 –50 90–40 M AX IM UM P OW ER D IS SI PA TI ON – W at ts –30 –20 –10 10 20 30 40 50 60 70 80 13 8 6 5 11 9 12 10 0 TJ = 1508C 3 2 1 0 AD815 AVR, AY q JA = 418C/W (STILL AIR = 0FT/MIN) NO HEAT SINK q JA = 528C/W (STILL AIR = 0 FT/MIN) NO HEAT SINK AD815ARB-24 q JA = 168C/W SOLDERED DOWN TO COPPER HEAT SINK (STILL AIR = 0FT/MIN) AD815 AVR, AY Plot of Maximum Power Dissipation vs. Temperature ABSOLUTE MAXIMUM RATINGS1 Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . – 18 V Total Internal Power Dissipation2 Plastic (Y and VR) . . 3.05 Watts (Observe Derating Curves) Small Outline (RB) . . 2.4 Watts (Observe Derating Curves) Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . – VS Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . – 6 V Output Short Circuit Duration . . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves Can Only Short to Ground Storage Temperature Range Y, VR and RB Package . . . . . . . . . . . . . . . –65° C to +125° C Operating Temperature Range AD815A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 ° C to +85 ° C Lead Temperature Range (Soldering, 10 sec) . . . . . . . +300 ° C NOTES 1Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2Specification is for device in free air with 0 ft/min air flow: 15-Lead Through-Hole and Surface Mount: q JA = 41 ° C/W; 24-Lead Surface Mount: q JA = 52° C/W. PIN CONFIGURATION 24-Lead Thermally-Enhanced SOIC (RB-24) TOP VIEW (Not to Scale) AD815 13 16 15 14 24 23 22 21 20 19 18 17 12 11 10 9 8 1 2 3 4 7 6 5 NC = NO CONNECT NC NC NC NC NC NC NC NC +IN1 –IN1 –IN2 +IN2 OUT1 –VS OUT2 +VS *HEAT TABS ARE CONNECTED TO THE POSITIVE SUPPLY. THERMAL HEAT TABS +VS* THERMAL HEAT TABS +VS* ORDERING GUIDE Model Temperature Range Package Description Package Option AD815ARB-24 –40° C to +85 ° C 24-Lead Thermally Enhanced SOIC RB-24 AD815ARB-24-REEL –40° C to +85 ° C 24-Lead Thermally Enhanced SOIC RB-24 AD815AVR –40° C to +85 ° C 15-Lead Surface Mount DDPAK VR-15 AD815AY –40° C to +85 ° C 15-Lead Through-Hole SIP with Staggered Leads and 90 ° Lead Form Y-15 AD815AYS –40° C to +85 ° C 15-Lead Through-Hole SIP with Staggered Leads and Straight Lead Form YS-15 AD815-EB Evaluation Board CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD815 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. WARNING! ESD SENSITIVE DEVICE AD815 REV. B–4– AD815–Typical Performance Characteristics JUNCTION TEMPERATURE – 8C –40 100–20 0 20 40 60 80 36 34 18 SU PP LY C UR RE NT – m A 26 24 22 20 30 28 32 VS = 615V VS = 65V Figure 4. Total Supply Current vs. Temperature SUPPLY VOLTAGE – 6Volts 33 30 18 0 162 TO TA L SU PP LY C UR RE NT – m A 4 6 8 10 12 14 27 24 21 TA = +258C Figure 5. Total Supply Current vs. Supply Voltage JUNCTION TEMPERATURE – 8C –40 100–20 0 20 40 60 80 10 0 –80 IN PU T BI AS C UR RE NT – m A –40 –50 –60 –70 –20 –30 –10 SIDE B SIDE A SIDE A, B +IB –IB –IBSIDE A SIDE B VS = 615V, 65V VS = 65V VS = 615V Figure 6. Input Bias Current vs. Temperature SUPPLY VOLTAGE – 6Volts 20 15 0 0 205 CO M M ON -M OD E VO LT AG E RA NG E – 6 Vo lts 10 15 10 5 Figure 1. Input Common-Mode Voltage Range vs. Supply Voltage SUPPLY VOLTAGE – 6Volts 40 30 0 0 205 10 15 20 10 80 60 0 40 20 NO LOAD RL = 50V (DIFFERENTIAL) RL = 25V (SINGLE-ENDED) SI NG LE -E ND ED O UT PU T VO LT AG E – V p- p DI FF ER EN TI AL O UT PU T VO LT AG E – V p- p Figure 2. Output Voltage Swing vs. Supply Voltage LOAD RESISTANCE – (Differential – V) (Single-Ended – V/2) 30 25 0 10 10k100 1k 20 15 10 5 DI FF ER EN TI AL O UT PU T VO LT AG E – Vo lts p -p 60 50 0 40 30 20 10 VS = 615V VS = 65V SI NG LE -E ND ED O UT PU T VO LT AG E – Vo lts p -p Figure 3. Output Voltage Swing vs. Load Resistance AD815 REV. B –5– JUNCTION TEMPERATURE – 8C 0 –14 –40 100–20 IN PU T O FF SE T VO LT AG E – m V 0 20 40 60 80 –2 –6 –8 –10 –12 –4 VS = 65V VS = 615V Figure 7. Input Offset Voltage vs. Temperature JUNCTION TEMPERATURE – 8C 750 600 450 –60 140–40 SH O RT C IR CU IT C UR RE NT – m A –20 0 20 40 60 80 100 120 700 650 550 500 VS = 615V SINK SOURCE Figure 8. Short Circuit Current vs. Temperature VOUT – Volts 15 0 –15 –20 20–16 –12 –8 –4 0 4 8 12 16 10 5 –5 –10 VS = 610V VS = 65V RT I O FF SE T – m V VS = 615V TA = 258C RL = 25V 1kV 1kV RL = 25V VOUT 1/2 AD815100V 49.9V VI N f = 0.1Hz Figure 9. Gain Nonlinearity vs. Output Voltage LOAD CURRENT – Amps 80 0 –60 40 20 –20 –40 60 –2.0 2.0–1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 VS = 610V VS = 65V RT I O FF SE T – m V VS = 615V TA = 258C 1kV 1kV RL = 5V VOUT 1/2 AD815100V 49.9V VI N f = 0.1Hz Figure 10. Thermal Nonlinearity vs. Output Current Drive FREQUENCY – Hz 100 30k 300M100k CL OS ED -L OO P OU TP UT R ES IS TA NC E – V 1M 10M 100M 10 1 0.1 0.01 300k 3M 30M VS = 65V VS = 615V Figure 11. Closed-Loop Output Resistance vs. Frequency FREQUENCY – MHz 40 0 0 146 DI FF ER EN TI AL O UT PU T VO LT AG E – V p- p 10 30 20 10 RL = 50V RL = 25V RL = 1V 2 4 8 12 RL = 100V TA = 258C VS = ±15V Figure 12. Large Signal Frequency Response AD815 REV. B–6– FREQUENCY – Hz 100 10 1 10 100k100 1k 10k VO LT AG E NO IS E – nV /Ö H z 100 10 1 CU RR EN T NO IS E – pA /Ö H z INVERTING INPUT CURRENT NOISE NONINVERTING INPUT CURRENT NOISE INPUT VOLTAGE NOISE Figure 13. Input Current and Voltage Noise vs. Frequency FREQUENCY – Hz 90 80 10 10k 100M100k CO M M O N- M O DE R EJ EC TI O N – dB 1M 10M 70 60 50 40 30 20 VS = 615V SIDE A SIDE B 562V 562V 562V 562V VOUTVIN 1/2 AD815 Figure 14. Common-Mode Rejection vs. Frequency FREQUENCY – MHz 0.01 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 0.1 PS RR – d B 1 10 100 300 –PSRR +PSRR VS = 615V G = +2 RL = 100V Figure 15. Power Supply Rejection vs. Frequency FREQUENCY – Hz 100 100M1k TR A N SI M PE DA NC E – dB 10k 100k 1M 10M 120 110 100 90 80 70 60 50 40 30 PH A SE – D eg re es 100 500 0 –50 –100 –150 –200 –250 TRANSIMPEDANCE PHASE Figure 16. Open-Loop Transimpedance vs. Frequency FREQUENCY – Hz –40 –50 –110 100 10M1k TO TA L HA RM O NI C DI ST O RT IO N – dB c 10k 100k 1M –60 –70 –80 –90 –100 VS = 615V G = +10 VOUT = 40V p-p RL = 50V (DIFFERENTIAL) RL = 200V (DIFFERENTIAL) Figure 17. Total Harmonic Distortion vs. Frequency SETTLING TIME – ns 10 –10 8 2 –2 –6 –8 6 4 0 –4 60 O UT PU T SW IN G F RO M ± V TO 0 – V ol ts 40 80 100 GAIN = +2 VS = 615V 1% 0.1% 0 20 70 1% 0.1% Figure 18. Output Swing and Error vs. Settling Time AD815 REV. B –7– OUTPUT STEP SIZE – V p-p 700 0 600 500 400 300 200 100 0 255 10 15 20 SI NG LE -E ND ED S LE W R AT E – V/ m s (P ER A MP LI FI ER ) G = +2 G = +10 1400 0 1200 1000 800 600 400 200 D IF FE RE NT IA L SL EW R AT E – V/ m s Figure 19. Slew Rate vs. Output Step Size JUNCTION TEMPERATURE – 8C –85 –80 –60 –40 100–20 PS RR – d B 0 20 40 60 80 –75 –70 –65 +PSRR –PSRR SIDE B SIDE A SIDE B SIDE A VS = 615V Figure 20. PSRR vs. Temperature JUNCTION TEMPERATURE – 8C –40 100–20 0 20 40 60 80 –74 –66 CM RR – d B –73 –70 –69 –68 –67 –72 –71 –CMRR +CMRR Figure 21. CMRR vs. Temperature JUNCTION TEMPERATURE – 8C 5 4 0 –40 100–20 O PE N- LO O P TR AN SR ES IS TA NC E – M V 0 20 40 60 80 3 2 1 +TZ SIDE ASIDE B SIDE A SIDE B –TZ Figure 22. Open-Loop Transresistance vs. Temperature JUNCTION TEMPERATURE – 8C 15 14 10 –40 100–20 O UT PU T SW IN G – V ol ts 0 20 40 60 80 13 12 11 VS = 615V | –VOUT | +VOUT +VOUT | –VOUT | RL = 150V RL = 25V Figure 23. Single-Ended Output Swing vs. Temperature JUNCTION TEMPERATURE – 8C 27 26 22 25 24 23 –40 100–20 OU TP UT S W IN G – Vo lts 0 20 40 60 80 VS = 615V RL = 50V –VOUT +VOUT Figure 24. Differential Output Swing vs. Temperature AD815 REV. B–8– 0.04 0.03 0.02 0.01 0.00 –0.01 –0.02 –0.03 –0.04 DI FF G AI N – % 0.12 0.10 0.08 0.06 0.04 0.02 0.00 –0.02 –0.04 DI FF P HA SE – D eg re es G = +2 RF = 1kV NTSC 1 2 3 4 5 6 7 8 9 10 11 0.5 0.4 0.3 0.2 0.1 0.0 –0.1 –0.2 –0.3 GAIN PHASE 0.005 0.000 –0.005 –0.010 –0.015 –0.020 –0.025 –0.030 0.010 DI FF G AI N – % DI FF P HA SE – D eg re es 1 2 3 4 5 6 7 8 9 10 11 6 BACK TERMINATED LOADS (25V) 2 BACK TERMINATED LOADS (75V) G = +2 RF = 1kV NTSC GAIN PHASE GAIN PHASE Figure 25. Differential Gain and Differential Phase (per Amplifier) FREQUENCY – MHz 0.03 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 0.1 CR OS ST AL K – dB 1 10 100 300 SIDE B SIDE A G = +2 RF = 499V VS = 615V, 65V VIN = 400mVrms RL = 100V –110 Figure 26. Output-to-Output Crosstalk vs. Frequency FREQUENCY – MHz 1 0 –1 –2 –3 –4 –5 –6 –7 –9 2 0.1 3001 O UT PU T VO LT AG E – dB 10 100 SIDE B SIDE A 562V 100V 100V 49.9V VOUT VIN VS = 615V VIN = 0 dBm Figure 27. –3 dB Bandwidth vs. Frequency, G = +1 FREQUENCY – MHz 0.1 0 0.1 3001 NO RM AL IZ ED F LA TN ES S – d B 10 100 615V 65V 499V 100V 100V 49.9V VOUT VIN 499V A B A B 615V 65V –0.1 –0.2 –0.3 –0.4 –0.5 –0.6 –0.7 1 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 NO RM AL IZ ED F RE QU EN CY R ES PO NS E – d B Figure 28. Bandwidth vs. Frequency, G = +2 FREQUENCY – MHz 0 0.1 3001 NO RM AL IZ ED O UT PU T VO LT AG E – dB 10 100 499V 100V 100V VOUT VIN 124V SIDE A SIDE B –1 –2 –3 –4 –5 –6 –7 1 VS = 615V 49.9V Figure 29. –3 dB Bandwidth vs. Frequency, G = +5 10 0% 100 90 1ms5V Figure 30. 40 V p-p Differential Sine Wave, RL = 50 W , f = 100 kHz AD815 REV. B –9– 1/2 AD815 0.1mF 10mF+15V 562V 0.1mF 10mF 7 –15V RL = 100V 100V 50V VIN PULSE GENERATOR TR/TF = 250ps 8 Figure 31. Test Circuit, Gain = +1 100mV 20ns SIDE B SIDE A G = +1 RF = 698V RL = 100V Figure 32. 500 mV Step Response, G = +1 1V 20ns SIDE B SIDE A G = +1 RF = 562V RL = 100V Figure 33. 4 V Step Response, G = +1 2V 50ns SIDE B SIDE A G = +1 RF = 562V RL = 100V Figure 34. 10 V Step Response, G = +1 1/2 AD815 8 0.1mF 10mF+15V 0.1mF 10mF 7 –15V RL = 100V 100V 50V VIN PULSE GENERATOR TR/TF = 250ps RS RF Figure 35. Test Circuit, Gain = 1 + RF /RS 5V 100ns SIDE B SIDE A G = +5 RF = 562V RL = 100V RS = 140V Figure 36. 20 V Step Response, G = +5 1/2 AD815 8 0.1mF 10mF+15V 0.1mF 10mF 7 –15V RL = 100V 100V 55V VIN PULSE GENERATOR TR/TF = 250ps 562V 562V Figure 37. Test Circuit, Gain = –1 100mV 20ns SIDE B SIDE A G = –1 RF = 562V RL = 100V Figure 38. 500 mV Step Response, G = –1 AD815 REV. B–10– Choice of Feedback and Gain Resistors The fine scale gain flatness will, to some extent, vary with feedback resistance. It therefore is recommended that once optimum resistor values have been determined, 1% tolerance values should be used if it is desired to maintain flatness over a wide range of production lots. Table I shows optimum values for several useful configurations. These should be used as starting point in any application. Table I. Resistor Values RF (V) RG (V) G = +1 562 ‘ –1 499 499 +2 499 499 +5 499 125 +10 1 k 110 PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS As to be expected for a wideband amplifier, PC board parasitics can affect the overall closed-loop performance. Of concern are stray capacitances at the output and the inverting input nodes. If a ground plane is to be u