a FEATURES xDSL Line Driver that Features Full ADSL CO (Central Office) Performance on ⴞ12 V Supplies Low Power Operation ⴞ5 V to ⴞ12 V Voltage Supply 12.5 mA/Amp (Typ) Total Supply Current Power-Reduced Keep-Alive Current of 4.5 mA/Amp High Output Voltage and Current Drive IOUT = 600 mA 40 V p-p Differential Output Voltage RL = 50 ⍀, V S = ⴞ12 V Low Single Tone Distortion –75 dBc @ 1 MHz SFDR, RL = 100 ⍀, VO = 2 V p-p MTPR = –75 dBc, 26 kHz to 1.1 MHz, ZLINE = 100 ⍀, PLINE = 20.4 dBm High Speed 78 MHz Bandwidth (–3 dB), G = +5 40 MHz Gain Flatness 1000 V/s Slew Rates Low Power, High Output Current xDSL Line Driver AD8016 PIN CONFIGURATION 24-Lead Batwing 20-Lead PSOP3 (RB-24) (RP-20) +V1 1 20 +V2 +V1 1 24 +V2 VOUT1 2 19 VOUT2 VOUT1 2 23 VOUT2 VINN1 3 18 VINN2 VINN1 3 22 VINN2 VINP1 4 17 VINP2 VINP1 4 21 VINP2 NC 5 16 NC AGND 5 20 AGND NC 6 15 NC AGND 6 19 AGND NC 7 14 NC AGND 7 18 AGND PWDN0 8 13 PWDN1 AGND 8 17 AGND DGND 9 12 BIAS PWDN0 9 16 PWDN1 –V1 10 11 –V2 DGND 10 15 BIAS –V1 11 14 NC 12 13 –V2 NC AD8016 NC = NO CONNECT AD8016 NC = NO CONNECT 28-Lead HTSSOP (RE-28) NC 1 28 NC NC 2 27 NC NC 3 26 NC PRODUCT DESCRIPTION +VIN2 4 25 NC The AD8016 high output current dual amplifier is designed for the line drive interface in Digital Subscriber Line systems such as ADSL, HDSL2, and proprietary xDSL systems. The drivers are capable, in full-bias operation, of providing 24.4 dBm output power into low resistance loads, enough to power a 20.4 dBm line, including hybrid insertion loss. –VIN2 5 24 PWDN1 VOUT2 6 23 BIAS +V2 7 22 –V2 +V1 8 21 –V1 VOUT1 9 20 DGND –VIN1 10 19 NC +VIN1 11 18 PWDN0 NC 12 17 NC NC 13 16 NC NC 14 15 NC AD8016ARE 10dB/DIV NC = NO CONNECT –75dBc 549.3 550.3 551.3 552.3 553.3 554.3 555.3 556.3 557.3 558.3 559.3 FREQUENCY – kHz Figure 1. Multitone Power Ratio; VS = ± 12 V, 20.4 dBm Output Power into 100 Ω, Downstream The AD8016 is available in a low cost 24-lead SOIC, a thermally enhanced 20-lead PSOP, and a 28-lead HTSSOP with an exposed leadframe (ePAD). Operating from ±12 V supplies, the AD8016 requires only 1.5 W of total power dissipation (refer to the Power Dissipation section for details) while driving 20.4 dBm of power downstream using the xDSL hybrid in Figure 33a and Figure 33b. Two digital bits (PWDN0, PWDN1) allow the driver to be capable of full performance, an output “keep-alive state,” or two intermediate bias states. The “keep-alive” state biases the output transistors enough to provide a low impedance at the amplifier outputs for back termination. The low power dissipation, high output current, high output voltage swing, flexible power-down, and robust thermal packaging enable the AD8016 to be used as the Central Office (CO) terminal driver in ADSL, HDSL2, VDSL, and proprietary xDSL systems. REV. A 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. 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., 2000 (@ 25ⴗC, VS = ⴞ12 V, RL = 100 ⍀, PWDN0, PWDN1 = (1, 1), TMIN = –40ⴗC, MAX = +85ⴗC, unless otherwise noted) AD8016–SPECIFICATIONS T Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Large Signal Bandwidth Peaking Slew Rate Rise and Fall Time Settling Time Input Overdrive Recovery Time NOISE/DISTORTION PERFORMANCE Distortion, Single-Ended 2nd Harmonic 3rd Harmonic Multitone Power Ratio1 IMD IP3 Voltage Noise (RTI) Input Current Noise Conditions Min G = +1, RF = 1.5 kΩ, VOUT = 0.2 V p-p G = +5, RF = 499 Ω, VOUT < 0.5 V p-p G = +5, RF = 499 Ω, VOUT = 0.2 V p-p VOUT = 4 V p-p VOUT = 0.2 V p-p < 50 MHz VOUT = 4 V p-p, G = +2 VOUT = 2 V p-p 0.1%, VOUT = 2 V p-p VOUT = 12.5 V p-p VOUT = 2 V p-p, G = +5, RF = 499 Ω fC = 1 MHz, RL = 100 Ω/25 Ω fC = 1 MHz, RL = 100 Ω/25 Ω 26 kHz to 1.1 MHz, ZLINE = 100 Ω, PLINE = 20.4 dBm 500 kHz, ∆f = 10 kHz, RL = 100 Ω/25 Ω 500 kHz, RL = 100 Ω/25 Ω f = 10 kHz f = 10 kHz INPUT CHARACTERISTICS RTI Offset Voltage +Input Bias Current –Input Bias Current Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Linear Output Current 69 16 –75/–62 –88/–74 –84/–80 42/40 –3.0 –45 –75 –10 58 Single-Ended, RL = 100 Ω G = 5, RL = 10 Ω, f1 = 100 kHz, –60 dBc SFDR 400 Recovery Time Shutdown Current Power Supply Rejection Ratio OPERATING TEMPERATURE RANGE 63 –40 Unit MHz MHz MHz MHz dB V/µs ns ns ns –77/–64 –93/–76 dBc dBc –75 –88/–85 43/41 2.6 18 dBc dBc dBm nV/√Hz pA√Hz 1.0 4 400 2 4.5 21 +3.0 +45 +75 +10 64 +11 600 2000 80 ±3 PWDN1, PWDN0 = (1, 1) PWDN1, PWDN0 = (1, 0) PWDN1, PWDN0 = (0, 1) PWDN1, PWDN0 = (0, 0) To 95% of IQ 250 µA Out of Bias Pin ∆VS = ± 1 V Max 380 78 38 90 0.1 1000 2 23 350 –11 Short Circuit Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current Typ 12.5 8 5 4 25 1.5 75 mV µA µA kΩ pF V dB V mA mA pF ± 13 13.2 10 8 6 4.0 +85 V mA/Amp mA/Amp mA/Amp mA/Amp µs mA/Amp dB °C NOTES 1 See Figure 43, R20, R21 = 0 Ω, R1 = open. Specifications subject to change without notice. –2– REV. A SPECIFICATIONS AD8016 (@ 25ⴗC, VS = ⴞ6 V, RL = 100 ⍀, PWDN0, PWDN1 = (1, 1), TMIN = –40ⴗC, TMAX = +85ⴗC, unless otherwise noted) Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Large Signal Bandwidth Peaking Slew Rate Rise and Fall Time Settling Time Input Overdrive Recovery Time NOISE/DISTORTION PERFORMANCE Distortion, Single-Ended 2nd Harmonic 3rd Harmonic Multitone Power Ratio1 IMD IP3 Voltage Noise (RTI) Input Current Noise Conditions Min G = +1, RF = 1.5 kΩ, VOUT = 0.2 V p-p G = +5, RF = 499 Ω, VOUT < 0.5 V p-p G = +5, RF = 499 Ω, VOUT = 0.2 V p-p VOUT = 1 V rms VOUT = 0.2 V p-p < 50 MHz VOUT = 4 V p-p, G = +2 VOUT = 2 V p-p 0.1%, VOUT = 2 V p-p VOUT = 6.5 V p-p G = +5, VOUT = 2 V p-p, RF = 499 Ω fC = 1 MHz, RL = 100 Ω/25 Ω fC = 1 MHz, RL = 100 Ω/25 Ω 26 kHz to 138 kHz, ZLINE = 100 Ω, PLINE = 13 dBm 500 kHz, ∆f = 110 kHz, RL = 100 Ω/25 Ω 500 kHz f = 10 kHz f = 10 kHz INPUT CHARACTERISTICS RTI Offset Voltage +Input Bias Current –Input Bias Current Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Linear Output Current Short Circuit Current Capacitive Load Drive POWER SUPPLY Quiescent Current Recovery Time Shutdown Current Power Supply Rejection Ratio 70 10 –73/61 –80/–68 –87/–82 42/39 –3.0 –25 –30 –4 60 Single-Ended, RL = 100 Ω G = 5, RL = 5 Ω, f = 100 kHz, –60 dBc SFDR Typ 320 71 15 80 0.7 300 2 39 350 –68 –88/–83 42/39 4 17 dBc dBc dBm nV/√Hz pA√Hz 0.2 10 10 400 2 5 20 +3.0 +25 +30 +4 66 +5 RS = 10 Ω PWDN1, PWDN0 = (1, 1) PWDN1, PWDN0 = (1, 0) PWDN1, PWDN0 = (0, 1) PWDN1, PWDN0 = (0, 0) To 95% of IQ 250 µA Out of Bias Pin ∆VS = ± 1 V 8 6 4 3 23 1.0 80 OPERATING TEMPERATURE RANGE 1.0 MHz MHz MHz MHz dB V/µs ns ns ns dBc dBc 420 830 50 63 Unit –75/–63 –82/–70 –5 300 Max –40 mV µA µA kΩ pF V dB V mA mA pF 9.7 6.9 5.0 4.1 2.0 +85 mA/Amp mA/Amp mA/Amp mA/Amp µs mA/Amp dB °C NOTES 1 See Figure 43, R20, R21 = 0 Ω, R1 = open. Specifications subject to change without notice. LOGIC INPUTS (CMOS-Compatible Logic) (PWDN0, PWDN1, V CC Parameter Min Logic “1” Voltage Logic “0” Voltage 2.2 0 REV. A –3– = ⴞ12 V or ⴞ6 V; Full Temperature Range) Typ Max Unit +VCC 0.8 V V AD8016 ABSOLUTE MAXIMUM RATINGS 1 MAXIMUM POWER DISSIPATION Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.4 V Internal Power Dissipation PSOP3 Package2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 W Batwing Package3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 W EPAD Package4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 W Input Voltage (Common-Mode) . . . . . . . . . . . . . . . . . . . . ± VS Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . ± VS Output Short Circuit Duration . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves Storage Temperature Range . . . . . . . . . . . . . –65°C to +125°C Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C Lead Temperature Range (Soldering 10 sec) . . . . . . . . . 300°C The maximum power that can be safely dissipated by the AD8016 is limited by the associated rise in junction temperature. The maximum safe junction temperature for plastic encapsulated device is determined by the glass transition temperature of the plastic, approximately 150°C. Temporarily exceeding this limit may cause a shift in parametric performance due to a change in the stresses exerted on the die by the package. The output stage of the AD8016 is designed for maximum load current capability. As a result, shorting the output to common can cause the AD8016 to source or sink 2000 mA. To ensure proper operation, it is necessary to observe the maximum power derating curves. Direct connection of the output to either power supply rail can destroy the device. NOTES 1 Stresses above those listed under Absolute Maximum Ratings may cause permanent 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. 2 Specification is for device on a four-layer board with 10 inches 2 of 1 oz. copper at 85°C 20-lead PSOP3 package: θJA = 18°C/W. 3 Specification is for device on a four-layer board with 10 inches 2 of 1 oz. copper at 85°C 24-lead Batwing package: θJA = 28°C/W. 4 Specification is for device on a four-layer board with 9 inches 2 of 1 oz. copper at 85°C 28-lead (EPAD) package: θJA = 29°C/W. MAXIMUM POWER DISSIPATION – Watts 8 7 6 PSOP3 5 4 BATWING 3 EPAD 2 1 0 0 10 20 30 40 50 60 70 AMBIENT TEMPERATURE – ⴗC 80 90 Figure 2. Plot of Maximum Power Dissipation vs. Temperature for AD8016 for TJ = 125°C ORDERING GUIDE Model Temperature Range Package Description Package Option AD8016ARP AD8016ARP-Reel AD8016ARP-EVAL AD8016ARB AD8016ARB-Reel AD8016ARB-EVAL AD8016ARE AD8016ARE-Reel AD8016ARE-EVAL –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C 20-Lead PSOP3 20-Lead PSOP3 Evaluation Board 24-Lead Batwing 24-Lead Batwing Evaluation Board 28-Lead HTSSOP 28-Lead HTSSOP Evaluation Board RP-20 ARP-Reel ARP-EVAL RB-24 ARB-Reel ARB-EVAL RE-28 ARE-Reel ARE-EVAL 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 AD8016 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. –4– WARNING! ESD SENSITIVE DEVICE REV. A Typical Performance Characteristics– AD8016 10F 124⍀ +VS 499⍀ + 0.1F VOUT RL +VIN +VO 49.9⍀ VIN 499⍀ 49.9⍀ +VS 0.1F + 10F 0.1F + 10F 111⍀ 499⍀ 0.1F –VIN –VS 10F + Figure 6. Differential Test Circuit; G = +10 Figure 3. Single-Ended Test Circuit; G = +5 VOUT = 100mV VOUT = 100mV VOLTS VOLTS –VO 49.9⍀ –VS VIN = 20mV VIN = 20mV TIME – 100ns/DIV TIME – 100ns/DIV Figure 7. 100 mV Step Response; G = +5, VS = ± 12 V, RL = 25 Ω, Single-Ended Figure 4. 100 mV Step Response; G = +5, VS = ± 6 V, RL = 25 Ω, Single-Ended VOUT = 5V VOLTS VOLTS VOUT = 4V VIN = 800mV VIN = 800mV TIME – 100ns/DIV TIME – 100ns/DIV Figure 8. 4 V Step Response; G = +5, VS = ± 12 V, RL = 25 Ω, Single-Ended Figure 5. 4 V Step Response; G = +5, VS = ± 6 V, RL = 25 Ω, Single-Ended REV. A RL –5– AD8016 –30 –30 –40 DISTORTION – dBc (1,0) –60 –70 –80 PWDN 1,0 = (1,1) –60 PWDN 1,0 = (1,1) –80 –90 –100 –100 0.1 10 1 FREQUENCY – MHz –110 0.01 20 Figure 9. Distortion vs. Frequency; Second Harmonic, VS = ± 12 V, RL = 50 Ω, Differential –30 –60 –70 PWDN 1,0 = (1,1) PWDN 1,0 = (1,1) –80 –100 –100 –110 0.01 20 Figure 10. Distortion vs. Frequency; Second Harmonic, VS = ± 6 V, RL = 50 Ω, Different 0.1 10 1 FREQUENCY – MHz 20 Figure 13. Distortion vs. Frequency; Third Harmonic, VS = ± 6 V, RL = 50 Ω, Differential –30 –30 RF = 499⍀ G = +5 –35 RF = 499⍀ G = +5 –40 –40 (1,0) (0,0) –45 DISTORTION – dBc DISTORTION – dBc (1,0) –70 –90 10 (0,1) –60 –90 1 FREQUENCY – MHz 20 (0,0) –50 (1,0) 0.1 RF = 499⍀ G = +10 VO = 4V p-p –40 DISTORTION – dBc DISTORTION – dBc –50 –110 0.01 10 1 FREQUENCY – MHz –30 (0,1) –80 0.1 Figure 12. Distortion vs. Frequency; Third Harmonic, VS = ± 12 V, RL = 50 Ω, Differential (0,0) RF = 499⍀ G = +10 VO = 4V p-p (1,0) –70 –90 –110 0.01 (0,1) –50 (0,1) –40 RF = 499⍀ G = +10 VO = 4V p-p –40 –50 DISTORTION – dBc (0,0) (0,0) RF = 499⍀ G = +10 VO = 4V p-p –50 –55 (0,0) (0,1) (1,0) –60 –65 –70 –50 (0,1) –60 –70 –80 PWDN 1,0 = (1,1) –75 PWDN 1,0 = (1,1) –80 0 100 200 300 400 500 600 PEAK OUTPUT CURRENT – mA 700 –90 800 Figure 11. Distortion vs. Peak Output Current; Second Harmonic, VS = ± 12 V, RL = 10 Ω, f = 100 kHz, Single-Ended 0 100 200 300 400 500 PEAK OUTPUT CURRENT – mA 600 700 Figure 14. Distortion vs. Peak Output Current, Third Harmonic; VS = ± 12 V, RL = 10 Ω, G = +5, f = 100 kHz, Single-Ended –6– REV. A AD8016 –30 –30 RF = 499⍀ G = +5 –35 –40 –40 –45 –45 DISTORTION – dBc DISTORTION – dBc –35 (0,0) –50 (0,1) –55 (1,0) –60 –65 –70 (0,0) –55 (0,1) –60 (1,0) –65 –70 –75 –75 PWDN 1,0 = (1,1) PWDN 1,0 = (1,1) –80 –80 0 100 200 300 400 PEAK OUTPUT CURRENT – mA 500 0 600 Figure 15. Distortion vs. Peak Output Current; Second Harmonic, VS = ± 6 V, RL = 5 Ω, f = 100 kHz, Single-Ended –30 –30 –40 –40 –50 –50 (0,0) –60 (0,1) –70 100 200 300 400 PEAK OUTPUT CURRENT – mA 500 600 Figure 18. Distortion vs. Peak Output Current; Third Harmonic, VS = ± 6 V, G = +5, RL = 5 Ω, f = 100 kHz, Single-Ended DISTORTION – dBc DISTORTION – dBc –50 (1,0) –80 (0,0) (0,1) –60 (1,0) –70 –80 PWDN 1,0 = (1,1) PWDN 1,0 = (1,1) –90 –90 –100 –100 0 5 10 15 20 25 30 DIFFERENTIAL OUTPUT – V p-p 35 40 0 Figure 16. Distortion vs. Output Voltage; Second Harmonic, VS = ± 12 V, G = +10, f = 1 MHz, RL = 50 Ω, Differential 5 10 15 20 25 30 DIFFERENTIAL OUTPUT – V p-p 35 40 Figure 19. Distortion vs. Output Voltage; Third Harmonic, VS = ± 12 V, G = +10, f = 1 MHz, RL = 50 Ω, Differential –30 –30 –40 –40 DISTORTION – dBc DISTORTION – dBc (0,0) –50 –60 (0,0) (0,1) –70 –50 (0,1) –60 (1,0) –70 (1,0) PWDN 1,0 = (1,1) –80 –80 PWDN 1,0 = (1,1) –90 –90 0 5 10 15 DIFFERENTIAL OUTPUT – V p-p 0 20 Figure 17. Distortion vs. Output Voltage; Second Harmonic, VS = ± 6 V, G = +10, f = 1 MHz, RL = 50 Ω, Differential REV. A 15 10 5 DIFFERENTIAL OUTPUT – V p-p 20 Figure 20. Distortion vs. Output Voltage, Third Harmonic, VS = ± 6 V, G = +10, f = 1 MHz, RL = 50 Ω, Differential –7– AD8016 6 NORMALIZED FREQUENCY RESPONSE – dB NORMALIZED FREQUENCY RESPONSE – dB 3 0 –3 1,1 VIN = 40mV p-p G = +5 RL = 100⍀ –6 –9 1,0 –12 0,1 –15 –18 0,0 –21 –24 10 FREQUENCY – MHz 100 500 Figure 21. Frequency Response; VS = ± 12 V, @ PWDN1, PWDN0 Codes –9 0,1 –15 –18 2 –1 –1 –4 –7 100 500 –4 –7 –10 –10 –13 –13 –16 –16 10 FREQUENCY – MHz –19 500 100 Figure 22. Output Voltage vs. Frequency; VS = ± 12 V 1 10 FREQUENCY – MHz 100 500 Figure 25. PSRR vs. Frequency; VS = ± 6 V –10 20 0 10 FREQUENCY – MHz G = +5 RL = 100⍀ RF = 499⍀ 8 5 10 0,0 –21 2 1 1,0 –12 5 –19 VIN = 40mV p-p G = +5 RL = 100⍀ –6 11 G = +5 RL = 100⍀ RF = 499⍀ PSRR – dB OUTPUT VOLTAGE – dBV 1,1 Figure 24. Frequency Response; VS = ± 6 V, @ PWDN1, PWDN0 Codes 11 8 0 –3 –24 1 –27 1 3 RF = 499⍀ VIN = 2V rms RF = 602⍀ –20 1,1 1,0 –30 +PSRR –20 –30 PSRR – dB CMRR – dB –10 0,1 –40 –40 –50 –PSRR –60 0,0 –50 –70 –60 –80 –70 –80 0.03 0.1 1 10 FREQUENCY – MHz 100 –90 0.01 500 0.1 1 10 FREQUENCY – MHz 100 500 Figure 26. PSRR vs. Frequency; VS = ± 12 V Figure 23. CMRR vs. Frequency; VS = ± 12 V @ PWDN1, PWDN0 Codes –8– REV. A 90 1000000 360 160 80 100000 320 140 70 10000 280 120 60 100 50 40 60 30 +I NOISE 40 20 VIN NOISE TRANSIMPEDANCE – k⍀ 80 10 20 0 10 100k 1k 10k FREQUENCY – MHz 100 80 0.01 40 –2mV (–0.1%) VOUT –VIN VOUT 5 10 15 20 25 TIME – ns 30 35 40 100 1000 0 10000 0 –2mV (–0.1%) VIN VOUT 0 5 VOUT –VIN 10 15 20 25 TIME – ns 30 35 40 45 Figure 31. Settling Time 0.1%; VS = ± 6 V 1000 VOUT = 2V p-p RF = 499⍀ G = +5 RL = 100⍀ 100 OUTPUT IMPEDANCE – ⍀ CROSSTALK – dB 0.1 1 10 FREQUENCY – MHz +2mV (–0.1%) –5 –20 –40 0.01 G = +2 RF = 1k⍀ VOUT = 2VSTEP RL = 100⍀ 45 Figure 28. Settling Time 0.1%; VS = ± 12 V –30 0.001 Figure 30. Open-Loop Transimpedance and Phase vs. Frequency 0 0 120 0.1 +2mV (–0.1%) –5 160 1 OUTPUT VOLTAGE ERROR – 2mV/DIV (0.1%/DIV) OUTPUT VOLTAGE ERROR – 2mV/DIV (0.1%/DIV) 10 G = +2 RF = 1k⍀ VOUT = 2VSTEP RL = 100⍀ VIN 200 TRANSIMPEDANCE 0 0.0001 Figure 27. Noise vs. Frequency 240 100 0 10M 1M PHASE 1000 –50 –60 –70 0,0 0,1 10 1,0 1 1,1 0.1 –80 –90 0.03 0.1 1 10 FREQUENCY – MHz 100 0.01 0.03 500 1 10 FREQUENCY – MHz 100 500 Figure 32. Output Impedance vs. Frequency @ PWDN1, PWDN0 Codes Figure 29. Output Crosstalk vs. Frequency REV. A 0.1 –9– PHASE – Degrees 180 INPUT VOLTAGE NOISE – nV/ Hz + INPUT CURRENT NOISE – pA/ Hz AD8016 AD8016 18 VIN = 2V/DIV VOUT = 5V/DIV 16 PWDN 1,0 = [1.1] VOUT 14 12 IQ – mA [1,0] 0V VIN 10 [0,1] 8 6 [0,0] 4 0V 2 –100 0 100 200 300 400 500 TIME – ns 600 700 800 0 900 a. Overload Recovery; VS = ± 12 V, G = +5, RL = 100 Ω 0 50 100 IBIAS – A 150 200 Figure 35. IQ vs. IBIAS Pin Current; VS = ± 6 V 12 +VOUT, VS = ⴞ12V VIN = 2V/DIV VOUT = 5V/DIV 8 +VOUT, VS = ⴞ6V OUTPUT SWING – Volts 0V VOUT 0V VIN 4 0 –4 –VOUT, VS = ⴞ6V –8 –VOUT, VS = ⴞ12V –100 0 100 200 300 400 500 TIME – ns 600 700 800 –12 10 900 100 1k 10k RLOAD – b. Overload Recovery; VS = ± 12 V, G = +5, RL = 100 Ω Figure 33. Figure 36. Output Voltage vs. RLOAD 25 PWDN 1,0 = [1,1] IQ – mA 20 [1,0] 15 [0,1] 10 [0,0] 5 0 0 50 100 IBIAS – A 150 200 Figure 34. IQ vs. IBIAS Pin Current; VS = ± 12 V –10– REV. A AD8016 THEORY OF OPERATION FEEDBACK RESISTOR SELECTION The AD8016 is a current feedback amplifier with high (500 mA) output current capability. With a current feedback amplifier the current into the inverting input is the feedback signal and the open-loop behavior is that of a transimpedance, dVo/dIin or TZ. The open-loop transimpedance is analogous to the open-loop voltage gain of a voltage feedback amplifier. Figure 37 shows a simplified model of a current feedback amplifier. Since RIN is proportional to 1/gm, the equivalent voltage gain is just TZ × gm, where gm is the transconductance of the input stage. Basic analysis of the follower with gain circuit yields: In current feedback amplifiers, selection of feedback and gain resistors will have an impact on the MTPR performance, bandwidth and gain flatness. Care should be exercised in the selection of these resistors so that optimum performance is achieved. The table below shows the recommended resistor values for use in a variety of gain settings. These values are suggested as a good starting point when designing for any application. VO VIN =G× Table I. Resistor Selection Guide TZ ( S ) TZ ( S ) + G × RIN + RF where: G =1+ RIN = 1 RF RG RF – RIN IIN RN + TZ 1k 500 650 750 1k ∞ 500 650 187 111 Table II. PWDN Code Selection Guide VOUT + VIN Figure 37. Simplified Block Diagram The AD8016 is the first current feedback amplifier capable of delivering 400 mA of output current while swinging to within 2 V of either power supply rail. This enables full CO ADSL performance on only 12 V rails, an immediate 20% power saving. The AD8016 is also unique in that it has a power management system included on-chip. It features four user programmable power levels (all of which provide a low output impedance of the driver), as well as the provision for complete shutdown (high impedance state). Also featured is a thermal shutdown with alarm signal. PWDN1 Code PWDN0 Code 1 1 0 0 X 1 0 1 0 X Quiescent Bias Level 100% (Full ON) 60% 40% 25% (Low ZOUT but Not OFF) Full OFF (High ZOUT via 250 µA Pulled Out of BIAS Pin) The bias level can be controlled with TTL logic levels (HI = 1) applied to PWDN1 and PWDN0 pins alone or in combination with BIAS control pin. The DGND or digital ground pin is the logic ground reference for PWDN1 and PWDN0 pins. In typical ADSL applications where ± 12 V or ± 6 V supplies (also single supplies) are used, the DGND pin is connected to analog ground. POWER SUPPLY AND DECOUPLING The AD8016 should be powered with a good quality (i.e., low noise) dual supply of ± 12 V for the best distortion and Multitone Power Ratio (MTPR) performance. Careful attention must be paid to decoupling the power supply pins. A 10 µF capacitor located in near proximity to the AD8016 is required to provide good decoupling for lower frequency signals. In addition, 0.1 µF decoupling capacitors should be located as close to each of the four power supply pins as is physically possible. All ground pins should be connected to a common low impedance ground plane. REV. A +1 –1 +2 +5 +10 RG (⍀) The AD8016 is designed to cover both CO (Central Office) and CPE (Customer Premise Equipment) ends of an xDSL application. It offers full versatility in setting quiescent bias levels for the particular application from full ON to reduced bias (in three steps) to full OFF (via BIAS pin). This versatility gives the modem designer the flexibility to maximize efficiency while maintaining reasonable levels of Multitone Power Ratio (MTPR) performance. Optimizing driver efficiency while delivering the required DMT power is accomplished with the AD8016 through the use of on-chip power management features. Two digitally programmable logic pins, PWDN1 and PWDN0, may be used to select four different bias levels; 100%, 60%, 40%, and 25% of full quiescent power (see Table II). Recognizing that G × RIN << RF for low gains, the familiar result of constant bandwidth with gain for current feedback amplifiers is evident, the 3 dB point being set when |TZ| = RF. Of course, for a real amplifier there are additional poles that contribute excess phase and there will be a value for RF below which the amplifier is unstable. Tolerance for peaking and desired flatness will determine the optimum RF in each application. RG RF (⍀) BIAS PIN AND PWDN FEATURES ≈ 25 Ω gm Gain The BIAS control pin by itself is a means to continuously adjust the AD8016 internal biasing and thus quiescent current IQ. By pulling out a current of 0 µA (or open) to approximately 200 µA, the quiescent current can be adjusted from 100% (full ON) to a full OFF condition. The full OFF condition yields a high output impedance. Because of on-chip resistor variation of up to ± 20% the actual amount of current required to fully shut down the AD8016 can vary. To institute a full chip shutdown, a pulldown current of 250 µA is recommended. See Figure 38 for logic drive circuit for complete amplifier shutdown. Figures 34 and 35 show the relationship between current pulled out of –11– AD8016 BIAS pin (IBIAS) and the supply current (IQ). A typical shutdown IQ is less than 1 mA total. Alternatively, an external pulldown resistor to ground or a current sink attached to the BIAS pin can be used to set IQ to lower levels (see Figure 39). The BIAS pin may be used in combination with the PWDN1 and PWDN0 pins; however, diminished MTPR performance may result when IQ is lowered too much. Current pulled away from the BIAS pin will shunt away a portion of the internal bias current. Setting PWDN1 or PWDN0 to Logic 0 also shunts away a portion of the internal bias current. The reduction of quiescent bias levels due to the use of PWDN1 and PWDN0 is consistent with the percentages established in Table II. When PWDN0 alone is set to Logic 0, and no other means of reducing the internal bias currents is used, full-rate ADSL signals may be driven while maintaining reasonable levels of MTPR. 3.3V LOGIC APPLICATIONS The AD8016ARP and AD8016ARB dual xDSL line driver amplifiers are the most efficient xDSL line drivers available to the market today. The AD8016 may be applied in driving modulated signals including Discrete Multitone (DMT) in either direction; upstream from Customer Premise Equipment (CPE) to the Central Office (CO) and downstream from CO to CPE. The most significant thermal management challenge lies in driving downstream information from CO sites to the CPE. Driving xDSL information downstream suggests the need to locate many xDSL modems in a single CO site. The implication is that several modems will be placed onto a single printed circuit board residing in a card cage located in a variety of ambient conditions. Environmental conditioners such as fans or air conditioning may or may not be available, depending on the density of modems and the facilities contained at the CO site. To achieve long-term reliability and consistent modem performance, designers of CO solutions must consider the wide array of ambient conditions that exist within various CO sites. R1* R2 50k⍀ BIAS 2N3904 *R1 = 47k⍀ FOR ⴞ12VS OR +12VS, R1 = 22k⍀ FOR ⴞ6VS. MULTITONE POWER RATIO OR MTPR Figure 38. Logic Drive of BIAS Pin for Complete Amplifier Shutdown THERMAL SHUTDOWN The AD8016ARB and ARP have been designed to incorporate shutdown protection against accidental thermal overload. In the event of thermal overload, the AD8016 was designed to shut down at a junction temperature of 165°C and return to normal operation at a junction temperature 140°C The AD8016 will continue to operate, cycling on and off, as long as the thermal overload condition remains. The frequency of the protection cycle depends on the ambient environment, severity of the thermal overload condition, the power being dissipated and the thermal mass of the PCB beneath the AD8016. When the AD8016 begins to cycle due to thermal stress, the internal shutdown circuitry draws current out of the node connected in common with the BIAS pin, while the voltage at the BIAS pin goes to the negative rail. When the junction temperature returns to 140°C, current is no longer drawn from this node and the BIAS pin voltage returns to the positive rail. Under these circumstances, the BIAS pin can be used to trip an alarm indicating the presence of a thermal overload condition. Figure 39 also shows three circuits for converting this signal to a standard logic level. VCC AD8016 200A V = VCC –0.2V 10k⍀ BIAS SHUTDOWN BIAS PWDN0 OR 0–200A VEE +5V PWDN1 VCC 10k⍀ +5V 10k⍀ BIAS 1M⍀ ALARM OR BIAS 100k⍀ 1/4 HCF 40109B SGS - THOMSON Figure 39. Shutdown and Alarm Circuit ALARM MIN  350 ADSL systems rely on Discrete Multitone (or DMT) modulation to carry digital data over phone lines. DMT modulation appears in the frequency domain as power contained in several individual frequency subbands, sometimes referred to as tones or bins, each of which is uniformly separated in frequency. (See Figure 1 for example of downstream DMT signals used in evaluating MTPR performance.) A uniquely encoded, Quadrature Amplitude Modulation (QAM) signal occurs at the center frequency of each subband or tone. Difficulties will exist when decoding these subbands if a QAM signal from one subband is corrupted by the QAM signal(s) from other subbands, regardless of whether the corruption comes from an adjacent subband or harmonics of other subbands. Conventional methods of expressing the output signal integrity of line drivers, such as spurious free dynamic range (SFDR), single-tone harmonic distortion or THD, two-tone Intermodulation Distortion (IMD) and 3rd order intercept (IP3) become significantly less meaningful when amplifiers are required to drive DMT and other heavily modulated waveforms. A typical xDSL downstream DMT signal may contain as many as 256 carriers (subbands or tones) of QAM signals. Multitone Power Ratio (MTPR) is the relative difference between the measured power in a typical subband (at one tone or carrier) versus the power at another subband specifically selected to contain no QAM data. In other words, a selected subband (or tone) remains open or void of intentional power (without a QAM signal) yielding an empty frequency bin. MTPR, sometimes referred to as the “empty bin test,” is typically expressed in dBc, similar to expressing the relative difference between single-tone fundamentals and 2nd or 3rd harmonic distortion components. See Figure 1 for a sample of the ADSL downstream spectrum showing MTPR results while driving 20.4 dBm of power onto a 100 Ω line. Measurements of MTPR are typically made at the output (line side) of ADSL hybrid circuits. (See Figure 46a for an example of Analog Devices’ hybrid schematic.) MTPR can be affected by the components contained in the hybrid circuit, including the quality of the capacitor dielectrics, voltage ratings and the turns ratio of the selected transformers. Other components aside, an ADSL driver hybrid containing the AD8016 can be optimized for the best MTPR performance by selecting the turns ratio of the transformers. The voltage and current demands from the differential driver changes, depending on the transformer –12– REV. A AD8016 turns ratio. The point on the curve indicating maximum dynamic headroom is achieved when the differential driver delivers both the maximum voltage and current while maintaining the lowest possible distortion. Below this point the driver has reserve current-driving capability and experiences voltage clipping while above this point the amplifier runs out of current drive capability before the maximum voltage drive capability is reached. Since a transformer reflects the secondary load impedance back to the primary side by the square of the turns ratio, varying the turns ratio changes the load across the differential driver. In the transformer configuration of Figure 46a and 46b, the turns ratio of the selected transformer is effectively doubled due to the parallel wiring of the transformer primaries within this ADSL driver hybrid. The following equation may be used to calculate the load impedance across the output of the differential driver, reflected by the transformers, from the line side of the xDSL driver hybrid. Z' is the primary side impedance as seen by the differential driver; Z2 is the line impedance and N is the transformer turns ratio. Z' ≡ Z2 (2 × N ) 2 Figure 40 shows the dynamic headroom in each subband of a downstream DMT waveform versus turns ratio running at 100% and 60% of the quiescent power while maintaining –65 dBc of MTPR at VS = ± 12 V. 4 The AD8016ARP-EVAL, AD8016ARB-EVAL, AD8016ARE-EVAL boards available through Analog Device provide a platform for evaluating the AD8016 in an ADSL differential line driver circuit. The board is laid out to accommodate Analog Devices two transformer line driver hybrid circuit (see Figures 46a and 46b) including line matching network, an RJ11 jack for interfacing to line simulators, transformer coupled input for single-todifferential input conversion and accommodations for the receiver function. Schematics and layout information are available for both versions of the EVAL board. Also included in the package are WFM files for use in generating 14-bit DMT waveforms. Upstream data is contained in the ...24.wfm files and downstream data in the ...128.wfm files. 3 DYNAMIC HEADROOM – dB VS = ⴞ11.4V PWDN1,0 = (1,1) 2 VS = ⴞ12V PWDN1,0 = (1,0) 0 VS = ⴞ11.4V PWDN1,0 = (1,0) –1 –2 1 1.1 1.2 1.4 1.3 1.5 1.6 1.7 DOWNSTREAM TURNS RATIO 1.8 1.9 At this time, DMT-modulated waveforms are not typically menuselectable items contained within arbitrary waveform generators. Even using (AWG) software to generate DMT signals, AWGs that are available today may not deliver DMT signals sufficient in performance with regard to MTPR due to limitations in the D/A converters and output drivers used by AWG manufacturers. Similar to evaluating single-tone distortion performance of an amplifier, MTPR evaluation requires a DMT signal generator capable of delivering MTPR performance better than that of the driver under evaluation. Generating DMT signals can be accomplished using a Tektronics AWG 2021 equipped with opt 4, (12/24-Bit, TTL Digital Data Out), digitally coupled to Analog Devices AD9754, a 14-bit TxDAC, buffered by an AD8002 amplifier configured as a differential driver. See Figure 45 for schematics of a circuit used to generate DMT signals that can achieve down to –80 dBc of MTPR performance, sufficient for use in evaluating xDSL drivers. Note that the DMT waveforms available with the AD8016ARP-EVAL and AD8016ARB-EVAL boards or similar WFM files are needed to produce the necessary digital data required to drive the TxDAC from the optional TTL Digital Data output of the TEK AWG2021. Copies of these WFM files can be obtained through the Analog Devices website. http://www.analog.com/. EVALUATION BOARDS VS = ⴞ12V PWDN1,0 = (1,1) 1 GENERATING DMT 2 Figure 40. Dynamic Headroom vs. XFMR Turns Ratio, VS = ± 12 V Once an optimum turns ratio is determined, the amplifier will have an MTPR performance for each setting of the power-down pins. The table below demonstrates the effects of reducing the total power dissipated by using the PWDN pins on MTPR performance when driving 20.4 dBm downstream onto the line with a transformer turns ratio of 1:1.4. Table III. Dynamic Power Dissipation for Downstream Transmission These DMT modulated signals are used to evaluate xDSL products for Multitone Power Ratio or MTPR performance. The data files are used in pairs (adslu24.wfm and adsll24.wfm go together, etc.) and are loaded into Tektronics AWG2021 arbitrary waveform generator. The adslu24.wfm is loaded via the TEK AWG2021 floppy drive into Channel 1, while the adsll24.wfm is simultaneously loaded into Channel 2. The number in the file name, prefixed with “u,” goes into CH1 or upper channel and the “l” goes into CH2 or the lower channel. 12 bits from CH1 are combined with 2 bits from CH2 to achieve 14bit digital data at the digital outputs of the TEK 2021. The resulting waveforms produced at the AD9754-EB outputs are then buffered and amplified by the AD8002 differential driver to achieve 14-bit performance from this DMT signal source. POWER DISSIPATION PWDN1 PWDN0 PD (W) MTPR 1 1 0 0* 1 0 1 0 1.454 1.262 1.142 0.120 –78 dBc –75.3 dBc –57.2 dBc N/A In order to properly size the heat sinking area for your application, it is important to consider the total power dissipation of the AD8016. The dc power dissipation for VIN = 0 is IQ (VCC – VEE), or 2 × IQ × VS. For the AD8016 powered on +12 V and –12 V supplies (± VS), the number is 0.6 W. In a differential driver circuit (Figure 6), *This mode is quiescent power dissipation. REV. A –13– AD8016 we can use symmetry to simplify the computation for a dc input signal. PD = 2 × IQ × VS + 4 × (VS – VO ) VO RL where VO is the peak output voltage of an amplifier. This formula is slightly pessimistic due to the fact that some of the quiescent supply current is commutated during sourcing or sinking current into the load. For a sine wave source, integration over a half cycle yields: 2 4 V V V O S PD = 2 × IQ × VS + 2 − O π RL RL The situation is more complicated with a complex modulated signal. In the case of a DMT signal, taking the equivalent sine wave power overestimates the power dissipation by ~23%. For example: POUT = 23.4 dBm = 220 mW THERMAL TESTING A wind tunnel study was conducted to determine the relationship between thermal capacity (i.e., printed circuit board copper area), air flow and junction temperature. Junction-to-ambient thermal resistance, θJA, was also calculated for the AD8016ARP, AD8016ARE, and AD8016ARB packages. The AD8016 was operated in a noninverting differential driver configuration, typical of an xDSL application yet isolated from any other modem components. Testing was conducted using a 1 ounce copper board in an ambient temperature of ~24°C over air flows of 200, 150, 100, and 50 (0.200 and 400 for AD8016ARE) linear feet per minute (LFM) and for ARP and ARB packages as well as in still air. The four-layer PCB was designed to maximize the area of copper on the outer two layers of the board while the inner layers were used to configure the AD8016 in a differential driver circuit. The PCB measured 3 × 4 inches in the beginning of the study and was progressively reduced in size to approximately 2 × 2 inches. The testing was performed in a wind tunnel to control air flow in units of LFM. The tunnel is approximately 11 inches in diameter. VOUT @ 50 Ω = 3.31 V rms VO = 2.354 V at each amplifier output, which yields a PD of 1.81 W. Through measurement, a DMT signal of 23.4 dBm requires 1.47 W of power to be dissipated by the AD8016. Figure 41 shows the results of calculation and actual measurements detailing the relationship between the power dissipated by the AD8016 versus the total output power delivered to the back termination resistors and the load combined. A 1:2 transformer turns ratio was used in the calculations and measurements. 2.5 2.0 CALCULATED POWER DISSIPATION of the die, allowing more drivers/square-inch within the CO design. The AD8016, whether in a PSOP3 (ARP) or batwing (ARB) package, can be designed to operate in the CO solution using prudent measures to manage the power dissipation through careful PCB design. The PSOP3 package is available for use in designing the highest density CO solutions. Maximum heat transfer to the PCB can be accomplished using the PSOP3 package when the thermal slug is soldered to an exposed copper pad directly beneath the AD8016. Optimum thermal performance can be achieved in the ARE package only when the back of the package is soldered to a PCB designed for maximum thermal capacity (see Figure 44). Thermal experiments with the PS0P3 package were conducted without soldering the heat slug to the PCB. Heat transfer was through physical contact only. The following offers some insight into the AD8016 power dissipation and relative junction temperature, the effects of PCB size and composition on the junction-to-air thermal resistance or θJA. 1.5 MEASURED SINE AIR FLOW TEST CONDITIONS DUT Power: Typical DSL DMT signal produces about 1.5 W of power dissipation in the AD8016 package. The fully biased (PWDN0 and PWDN1 = Logic 1) quiescent current of the AD8016 is ~25 mA. A 1 MHz differential sine wave at an amplitude of 8 V p-p/amplifier into an RLOAD of 100 Ω differential (50 Ω per side) will produce the 1.5 W of power typical in the AD8016 device. (See the Power Dissipation section for details.) MEASURED DMT 1.0 0.5 0 0 100 200 OUTPUT POWER – mW 300 Figure 41. Power Dissipation vs. Output Power (Including Back Terminations). See Figure 7 for Test Circuit THERMAL ENHANCEMENTS AND PCB LAYOUT There are several ways to enhance the thermal capacity of the CO solution. Additional thermal capacity can be created using enhanced PCB layout techniques such as interlacing (sometimes referred to as stitching or interconnection) of the layers immediately beneath the line driver. This technique serves to increase the thermal mass or capacity of the PCB immediately beneath the driver. (See AD8016-EVAL boards for an example of this method of thermal enhancement.) A cooling fan that draws moving air over the PCB and xDSL drivers, while not always required, may be useful in reducing the operating temperature Thermal Resistance: The junction-to-case thermal resistance (θ JC) of the AD8016ARB or batwing package is 8.6°C/W, AD8016ARE is 5.6°C/W, and the AD8016ARP or PSOP3 package is 0.86°C/W. These package specifications were used in this study to determine junction temperature based on the measured case temperature. PCB Dimensions of a Differential Driver Circuit: Several components are required to support the AD8016 in a differential driver circuit. The PCB area necessary for these components (i.e., feedback and gain resistors, ac coupling and decoupling capacitors, termination and load resistors) dictated the area of the smallest PCB in this study, 4.7 square inches. Further reduction in PCB area, although possible, will have consequences in terms of the maximum operating junction temperature. –14– REV. A AD8016 EXPERIMENTAL RESULTS 35 Note that the AD8016ARE is targeted at xDSL applications other than full-rate CO ADSL. The AD8016ARE is targeted at g.lite and other xDSL applications where reduced power dissipation can be achieved through a reduction in output power. Extreme temperatures associated with full-rate ADSL using the AD8016ARE should be avoided whenever possible. ARB 0 LFM ARB 50 LFM 30 JA – ⴗC/W The experimental data suggests that for both packages, and a PCB as small as 4.7 square inches, reasonable junction temperatures can be maintained even in the absence of air flow. The graph in Figure 42 shows junction temperature versus air flow for various dimensions of 1 ounce copper PCBs at an ambient temperature of 24°C in both the ARB and ARP packages. For the worst case package, the AD8016ARB and the worst case PCB at 4.7 square inches, the extrapolated junction temperature for an ambient environment of 85°C would be approximately 132°C with 0 LFM of air flow. If the target maximum junction temperature of the AD8016ARB is 125°C, a 4-layer PCB with 1 oz. copper covering the outer layers and measuring 9 square inches is required with 0 LFM of air flow. 25 ARB 150 LFM 20 ARP 50 LFM 15 ARP 150 LFM 10 4 10 Figure 43. Junction-to-Ambient Thermal Resistance vs. PCB Area 50 +24ⴗC AMBIENT 40 JA – ⴗC/W ARB 6 SQ-IN 70 65 ARB 7.125 SQ-IN 60 ARB 9 SQ-IN 35 ARE 0 LFM 30 ARE 200 LFM 25 ARP 4.7 SQ-IN ARE 400 LFM 55 20 ARP 6 SQ-IN 50 15 45 10 0 ARP 9 SQ-IN ARP 12 SQ-IN 0 50 100 AIR FLOW – LFM 150 200 1 2 3 4 5 6 PCB AREA – SQ-IN 7 8 9 10 Figure 44. Junction-to-Ambient Thermal Resistance vs. PCB Area Figure 42. Junction Temperature vs. Air Flow REV. A ARP 200 LFM 7 PCB AREA – SQ-IN 45 ARB 4.7 SQ-IN 40 ARB 200 LFM ARP 0 LFM ARP 100 LFM 75 JUNCTION TEMPERATURE – ⴗC ARB 100 LFM –15– 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 –16– A J4 A J3 R1 OUT2 OUT1 R2 C13 22pF C12 22pF A A R5 C4 10F TP4 B3 1F R6 49.9⍀ 1F A A 10k⍀ 10k⍀ 226⍀ AVEE 16 15 14 13 12 11 10 9 AVEE 0.1F AD8002 750⍀ 750⍀ AD8002 0.1F 1 2 3 4 5 6 7 A A 16 15 14 13 12 11 10 16 PINDIP RES PK 1 2 3 4 5 6 7 8 16 PINDIP RES PK TP5 TP18 TP19 B4 AVCC C30 C31 C32 C33 C34 C35 C36 C19 C1 C2 C25 C26 C27 C28 C29 A AGND DVDD 1 2 3 4 5 6 7 8 9 10 AVDD 10 9 8 7 6 5 4 3 2 1 49.9⍀ 1 2 3 4 5 6 7 8 9 10 10 9 8 7 6 5 4 3 2 1 3 5 7 9 11 13 TO TEK 15 AWG 17 2021 19 21 23 25 27 29 31 33 35 37 39 P1 1 DVDD TP2 TP3 C3 10F B2 DGND B1 DVDD R3 C6 10F TP7 B6 249⍀ 249⍀ R4 A A R7 R8 DVDD 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J1 2 3 4 5 6 7 8 9 10 EXTCLK 10 9 8 7 6 5 4 3 2 1 DVDD A DIFFERENTIAL DMT OUTPUTS 1 2 3 4 5 6 7 8 9 10 A AVCC 10 9 8 7 6 5 4 3 2 1 C5 10F TP6 B5 A TP12 A 28 27 26 25 24 23 22 21 20 19 18 17 16 15 2 CLK JP1 R17 49.9⍀ CLOCK DVDD DCOM NC AVDD COMP2 IOUTA IOUTB ACOM COMP1 FS ADJ REFIO REFLO SLEEP CT1 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 AD9754 U1 1 R15 49.9⍀ TP1 PDIN J2 A 3 B JP2 A 3 2 1 AVDD TP11 AVDD C7 1F A A JP4 TP14 R 20k⍀ R16 2k⍀ TP10 AVDD C11 0.1F C8 0.1F TP9 OUT2 TP8 OUT1 C10 0.1F AVDD A C9 0.1F TP13 AD8016 Figure 45. DMT Signal Generator Schematic REV. A AD8016 TP10 TP5 AGND3,4,5 +VT C8 1 R9 4 S5 R11 R13 R24 3 AD8016 11 2 1 A B 3 –VT T3 6 P4 1 1:1 R18 R17 2 R23 R25 22 U1 R14 21 S6 R16 C10 TP4 1 R3 C6 7 R4 C7 1 10 TP16 2 8 3 9 4 1 2 3 4 5 6 C9 7 P1 NC = 5, 6 +V AD8016 24 TP8 +VT +VR;8 –VR;4 TP17 S3 C5 TP14 TP1 R21 C12 23 R2 T1 PR2 14 –V C4 NC = 5, 6 –VT AGND3,4,5 TP11 9 R19 JP5 R15 8 3 R1 5 WATT 2 NC = 5 P4 3 10 2 1 1 3 4 P4 2 1 4 JP6 TP15 T2 R20 C11 2 U1 –V TP13 TP7 PR1 TP6 +V 7 8 TP2 TP9 3 U2 2 AD8022 P3 3 R6 P3 2 R5 R7 P3 1 TP18 AD8022 7 S4 6 U2 5 +VR;8 –VR;4 Figure 46a. Schematic AD8016ARB-EVAL TP19 TP3 L5 +VT TB2 TB2 +VR 1 BEAD C21 0.1F C23 0.1F + C3 10F 25V C24 0.1F C22 0.1F P2 2 16 JP1 3 JP3 1 2 JP4 BEAD TP12 TP24 +VL BEAD –VR –VT + C2 10F 25V C20 0.1F TP23 TP25 C18 0.1F Figure 46b. Schematic AD8016ARB-EVAL REV. A +VR –VR L2 TB3 PDN1 JP2 +VT TP22 TB3 PDN0 –17– TP26 TP27 TP28 TP29 TP30 AGND 1 AGND 3 P2 2 L3 TB2 + C13 10F 25V P2 U1 AD8016 DGND 5 TP21 L4 9 20 TP20 BIAS 19 10 AGND 15 R12 18 +VL BEAD NC 12 R22 –VT 3 13 CW R10 NC C25 0.1F AGND C16 0.1F AGND C19 0.1F R9 17 + C1 10F 25V S2 AGND C26 0.1F 8 C15 0.1F AGND C17 0.1F 2 L1 TB1 + C14 10F 25V 7 BEAD AGND TB1 1 6 TB1 AD8016 LAYOUT AD8016ARB-EVAL Figure 47. Assembly Figure 50. Layer 1 Figure 48. Layer 1 Figure 51. Silkscreen Bottom Figure 49. Power/Ground Plane –18– REV. A AD8016 ALP – EVALUATION BOARD – BILL OF MATERIALS Qty. Description Vendor Ref Desc. 5 10 2 2 1 3 2 1 2 4 2 1 2 2 2 4 2 2 1 5 5 5 1 1 3 1 1 4 4 10 µF 25 V Size Tantalum Chip Capacitor 0.1 µF 50 V 1206 Size Ceramic Chip Capacitor 49.9 Ω 1% 1/8 W 1206 Size Chip Resistor 100 Ω 1% 1/8 W 1206 Size Chip Resistor 100 Ω 5% 3.0 W Metal Film Power Resistor 1.00 kΩ 1% 1/6 W 1206 Size Chip Resistor 10.0 kΩ 1% 1/6 W 1206 Size Chip Resistor Test Point (Black) [GND] Test Point (Brown) Test Point (Red) Test Point (Orange) Test Point (Yellow) Test Point (Green) Test Point (Blue) Test Point (Violet) Test Point (Grey) Test Point (White) 3 Green Terminal Block. ONSHORE# EDZ250/3 2 Green Terminal Block. ONSHORE# EDZ250/2 1 Inch Center Shunt Berg# 65474-001 Male Header. 1 Inch Center. Berg #69157-102 Conn. BNC Vert. MT Telegartner # J01001A1944 AMP# 555154-1 MOD. JACK (SHIELDED) 6 6 3-Pin Gold Male Header Waldom #WM 2723-ND 3-Pin Gold Male Locking Header Waldom #WM 2701-ND AD8016 ARB AD8016 SOIC Rev. A Evaluation PC Board # 4 –40 × 1/4" Panhead SS Machine Screw # 4 –40 × 1/2" Threaded Alum. Standoffs ADS# 4-7-2 ADS# 4-5-18 ADS# 3-14-26 ADS# 3-18-40 ADS# 3-24-1 ADS# 3-18-11 ADS# 3-18-119 ADS# 12-18-44 ADS# 12-18-59 ADS# 12-18-43 ADS# 12-18-60 ADS# 12-18-32 ADS# 12-18-61 ADS# 12-18-62 ADS# 12-18-63 ADS# 12-18-64 ADS# 12-18-42 ADS# 12-19-14 ADS# 12-19-13 ADS# 11-2-38 ADS# 11-2-37 ADS# 12-6-22 D–K# A 9024 D–K# WM 2723-ND D–K# WM 2701-ND ADS# AD 8016 XRP SIERRA/PROTO EXPRESS ADS# 30-1-1 ADS# 30-16-2 C1–3, 13, 14 C15–21, 24–26 R11, 15 R8, 14 R1 R17–R19 R13 and 16 GND TP10, 11 TP17–19, 21 TP3, 15, 16 TP12 TP7, 9 TP20, 22 TP4, 5 TP1, 2, 13, 14 TP6, 8 TB1, TB2 TB3 J1–J5 J1–J5 S2–S6 P1 JP6 P2–4 D.U.T. Eval. PC Board OPTION 2 1:1.4 Turns Ratio RF Transformer from CoEv C1374 Rev. 2 T1, T2 REV. A –19– AD8016 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Lead PSOP3 (RP-20A) C01019a–1–8/00 (rev. A) 0.5118 (13.00) 0.3543 (9.00) 0.0433 (1.10) MAX ⴛ 45ⴗ 1 10 PIN 1 0.4370 (11.10) 0.4331 (11.00) 0.4252 (10.80) 0.5709 (14.50) 0.5591 (14.20) 0.5472 (13.90) TOP VIEW 11 0.2441 (6.20) 0.2283 (5.80) BOTTOM VIEW 20 DETAIL A SEATING PLANE 0.0433 (1.10) MAX 2 PLACES SIDE VIEW 0.0500 (1.27) BSC 0.1142 (2.90) MAX 2 PLACES DETAIL A 0.0394 (1.00) 0.0354 (0.90) 0.0315 (0.80) 0.0209 (0.53) 0.0157 (0.40) 8° 0° END VIEW 0.0433 (1.10) 0.0315 (0.80) 0.0039 (0.10) 0.0020 (0.05) 0.0000 (0.00) 0.1118 (0.30) 0.0079 (0.20) 0.0039 (0.10) 0.1299 (3.30) 0.1240 (3.15) 0.1181 (3.00) 0.0126 (0.32) 0.0090 (0.23) 24-Lead Batwing (RB-24) 0.6141 (15.60) 0.5985 (15.20) 24 13 0.2992 (7.60) 0.2914 (7.40) 1 0.4193 (10.65) 0.3937 (10.00) 12 0.1043 (2.65) 0.0926 (2.35) PIN 1 0.0118 (0.30) 0.0040 (0.10) 0.0500 (1.27) BSC 0.0291 (0.74) ⴛ 45° 0.0098 (0.25) 8° 0.0201 (0.51) 0° SEATING 0.0125 (0.32) 0.0130 (0.33) PLANE 0.0091 (0.23) 0.0500 (1.27) 0.0157 (0.40) 28-Lead HTSSOP (RE-28) 0.386 (9.80) 0.382 (9.70) 0.378 (9.60) 28 EXPOSED PAD ON BOTTOM 15 0.177 (4.50) 0.252 0.173 (4.40) (6.40) 0.169 (4.30) BSC 0.059 (1.50) MIN 1 0.130 (3.30) MIN PRINTED IN U.S.A. 0.1417 (3.60) 0.1319 (3.35) 0.1220 (3.10) 0.6299 (16.00) 0.6260 (15.90) 0.6220 (15.80) 14 PIN 1 0.047 (1.20) MAX 0.006 (0.15) 0.000 (0.00) 0.0256 (0.65) BSC 0.0118 (0.30) 0.0075 (0.19) 0.041 (1.05) 0.039 (1.00) 0.031 (0.80) SEATING PLANE 0.0079 (0.20) 0.0035 (0.09) 8ⴗ 0ⴗ 0.030 (0.75) 0.024 (0.60) 0.177 (0.45) CONTROLLING DIMENSIONS ARE IN MILLIMETERS (mm) –20– REV. A