AD8036ANZ

Page 1

Page 2

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 AD8036/AD8037 large-signal bandwidths and ultralow distortion. The AD8036 achieves –66 dBc at 20 MHz, and 240 MHz small-signal and 195 MHz large-signal bandwidths. The AD8036 and AD8037’s recover from 2× clamp overdrive within 1.5 ns. These character- istics position the AD8036/AD8037 ideally for driving as well as buffering flash and high resolution ADCs. In addition to traditional output clamp amplifier applications, the input clamp architecture supports the clamp levels as addi- tional inputs to the amplifier. As such, in addition to static dc clamp levels, signals with speeds up to 240 MHz can be applied to the clamp pins. The clamp values can also be set to any value within the output voltage range provided that VH is greater that VL. Due to these clamp characteristics, the AD8036 and AD8037 can be used in nontraditional applications such as a full-wave rectifier, a pulse generator, or an amplitude modulator. These novel applications are only examples of some of the diverse applications which can be designed with input clamps. The AD8036 is offered in chips, industrial (–40°C to +85°C) and military (–55°C to +125°C) package temperature ranges and the AD8037 in industrial. Industrial versions are available in plastic DIP and SOIC; MIL versions are packaged in cerdip. –4 –3 –2 –1 0 1 2 3 4 4 3 2 1 0 –1 –2 –3 –4 INPUT VOLTAGE – Volts O U T P U T V O L T A G E – V o lt s VL = –3V VL = –2V VL = –1V VH = 1V VH = 2V VH = 3V AD8036 Figure 1. Clamp DC Accuracy vs. Input Voltage FEATURES Superb Clamping Characteristics 3 mV Clamp Error 1.5 ns Overdrive Recovery Minimized Nonlinear Clamping Region 240 MHz Clamp Input Bandwidth
3.9 V Clamp Input Range Wide Bandwidth AD8036 AD8037 Small Signal 240 MHz 270 MHz Large Signal (4 V p-p) 195 MHz 190 MHz Good DC Characteristics 2 mV Offset 10 V/C Drift Ultralow Distortion, Low Noise –72 dBc typ @ 20 MHz 4.5 nV/√Hz Input Voltage Noise High Speed Slew Rate 1500 V/s Settling 10 ns to 0.1%, 16 ns to 0.01%
3 V to
5 V Supply Operation APPLICATIONS ADC Buffer IF/RF Signal Processing High Quality Imaging Broadcast Video Systems Video Amplifier Full Wave Rectifier FUNCTIONAL BLOCK DIAGRAM 8-Lead Plastic DIP (N), Cerdip (Q), and SO Packages 1 2 3 4 8 7 6 5 AD8036/ AD8037 NC –INPUT +INPUT –VS +VS OUTPUT (Top View) NC = NO CONNECT VL VH Low Distortion, Wide Bandwidth Voltage Feedback Clamp Amps PRODUCT DESCRIPTION The AD8036 and AD8037 are wide bandwidth, low distortion clamping amplifiers. The AD8036 is unity gain stable. The AD8037 is stable at a gain of two or greater. These devices allow the designer to specify a high (VCH) and low (VCL) output clamp voltage. The output signal will clamp at these specified levels. Utilizing a unique patent pending CLAMPIN™ input clamp architecture, the AD8036 and AD8037 offer a 10× improvement in clamp performance compared to traditional output clamping devices. In particular, clamp error is typically 3 mV or less and distortion in the clamp region is minimized. This product can be used as a classical op amp or a clamp amplifier where a high and low output voltage are specified. The AD8036 and AD8037, which utilize a voltage feedback architecture, meet the requirements of many applications which previously depended on current feedback amplifiers. The AD8036 and AD8037 exhibit an exceptionally fast and accurate pulse response (16 ns to 0.01%), extremely wide small-signal and CLAMPIN is a trademark of Analog Devices, Inc. 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

Page 3

AD8036/AD8037–SPECIFICATIONS ELECTRICAL CHARACTERISTICS REV. B–2– (
VS =
5 V; RLOAD = 100 ; AV = +1 (AD8036); AV = +2 (AD8037), VH, VL open, unless otherwise noted) AD8036A AD8037A Parameter Conditions Min Typ Max Min Typ Max Unit DYNAMIC PERFORMANCE Bandwidth (–3 dB) Small Signal VOUT ≤ 0.4 V p-p 150 240 200 270 MHz Large Signal1 8036, VOUT = 2.5 V p-p; 8037, VOUT = 3.5 V p-p 160 195 160 190 MHz Bandwidth for 0.1 dB Flatness VOUT ≤ 0.4 V p-p 8036, RF = 140 Ω; 8037, RF = 274 Ω 130 130 MHz Slew Rate, Average +/– VOUT = 4 V Step, 10–90% 900 1200 1100 1500 V/µs Rise/Fall Time VOUT = 0.5 V Step, 10–90% 1.4 1.2 ns VOUT = 4 V Step, 10–90% 2.6 2.2 ns Settling Time To 0.1% VOUT = 2 V Step 10 10 ns To 0.01% VOUT = 2 V Step 16 16 ns HARMONIC/NOISE PERFORMANCE 2nd Harmonic Distortion 2 V p-p; 20 MHz, RL = 100 Ω –59 –52 –52 –45 dBc RL = 500 Ω –66 –59 –72 –65 dBc 3rd Harmonic Distortion 2 V p-p; 20 MHz, RL = 100 Ω –68 –61 –70 –63 dBc RL = 500 Ω –72 –65 –80 –73 dBc 3rd Order Intercept 25 MHz 46 41 dBm Noise Figure RS = 50 Ω 18 14 dB Input Voltage Noise 1 MHz to 200 MHz 6.7 4.5 nV√Hz Input Current Noise 1 MHz to 200 MHz 2.2 2.1 pA√Hz Average Equivalent Integrated Input Noise Voltage 0.1 MHz to 200 MHz 95 60 µV rms Differential Gain Error (3.58 MHz) RL = 150 Ω 0.05 0.09 0.02 0.04 % Differential Phase Error (3.58 MHz) RL = 150 Ω 0.02 0.04 0.02 0.04 Degree Phase Nonlinearity DC to 100 MHz 1.1 1.1 Degree CLAMP PERFORMANCE Clamp Voltage Range2 VCH or VCL ± 3.3 ± 3.9 ± 3.3 ± 3.9 V Clamp Accuracy 2× Overdrive, VCH = +2 V, VCL = –2 V ± 3 ± 10 ± 3 ± 10 mV TMIN–TMAX ± 20 ± 20 mV Clamp Nonlinearity Range3 100 100 mV Clamp Input Bias Current (VH or VL) 8036, VH, L = ± 1 V; 8037, VH, L = ± 0.5 V ± 40 ± 60 ± 50 ± 70 µA TMIN–TMAX ± 80 ± 90 µA Clamp Input Bandwidth (–3 dB) VCH or VCL = 2 V p-p 150 240 180 270 MHz Clamp Overshoot 2× Overdrive, VCH or VCL = 2 V p-p 1 5 1 5 % Overdrive Recovery 2× Overdrive 1.5 1.3 ns DC PERFORMANCE4, RL = 150 Ω Input Offset Voltage5 2 7 2 7 mV TMIN–TMAX 11 10 mV Offset Voltage Drift ± 10 ± 10 µV/°C Input Bias Current 4 10 3 9 µA TMIN–TMAX 15 15 µA Input Offset Current 0.3 3 0.1 3 µA TMIN–TMAX 5 5 µA Common-Mode Rejection Ratio VCM = ±2 V 66 90 70 90 dB Open-Loop Gain VOUT = ± 2.5 V 48 55 54 60 dB TMIN–TMAX 40 46 dB INPUT CHARACTERISTICS Input Resistance 500 500 kΩ Input Capacitance 1.2 1.2 pF Input Common-Mode Voltage Range ± 2.5 ± 2.5 V OUTPUT CHARACTERISTICS Output Voltage Range, RL = 150 Ω ± 3.2 ± 3.9 ± 3.2 ± 3.9 V Output Current 70 70 mA Output Resistance 0.3 0.3 Ω Short Circuit Current 240 240 mA POWER SUPPLY Operating Range ± 3.0 ± 5.0 ± 6.0 ± 3.0 ± 5.0 ± 6.0 V Quiescent Current 20.5 21.5 18.5 19.5 mA TMIN–TMAX 25 24 mA Power Supply Rejection Ratio TMIN–TMAX 50 60 56 66 dB NOTES 1See Max Ratings and Theory of Operation sections of data sheet. 2See Max Ratings. 3Nonlinearity is defined as the voltage delta between the set input clamp voltage (VH or VL) and the voltage at which VOUT starts deviating from VIN (see Figure 73). 4Measured at AV = 50. 5Measured with respect to the inverting input. Specifications subject to change without notice.

Page 4

AD8036/AD8037 REV. B –3– ABSOLUTE MAXIMUM RATINGS1 Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6 V Voltage Swing × Bandwidth Product . . . . . . . . . . . 350 V-MHz |VH–VIN| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 6.3 V |VL–VIN| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 6.3 V Internal Power Dissipation2 Plastic DIP Package (N) . . . . . . . . . . . . . . . . . . . . 1.3 Watts Small Outline Package (SO) . . . . . . . . . . . . . . . . . . 0.9 Watts Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . ±VS Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ±1.2 V Output Short Circuit Duration . . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves Storage Temperature Range N, R . . . . . . . . . –65°C to +125°C Operating Temperature Range (A Grade) . . . –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: 8-Lead Plastic DIP: θJA = 90°C/W 8-Lead SOIC: θJA = 155°C/W 8-Lead Cerdip: θJA = 110°C/W. MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by these devices is limited by the associated rise in junction temperature. The maximum safe junction temperature for plastic encapsulated devices is determined by the glass transition temperature of the plastic, approximately 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. While the AD8036 and AD8037 are internally short circuit pro- tected, this may not be sufficient to guarantee that the maxi- mum junction temperature (150°C) is not exceeded under all conditions. To ensure proper operation, it is necessary to observe the maximum power derating curves. 2.0 0 –50 80 1.5 0.5 –40 1.0 0 10–10–20–30 20 30 40 50 60 70 90 AMBIENT TEMPERATURE – C M A X IM U M P O W E R D IS S IP A T IO N – W a tt s TJ = +150C8-LEAD PLASTIC DIP PACKAGE 8-LEAD SOIC PACKAGE Figure 2. Plot of Maximum Power Dissipation vs. Temperature METALIZATION PHOTO Dimensions shown in inches and (mm). Connect Substrate to –VS. AD8036 8036 AD8037 8037 +IN –VS OUT –IN +VSVH VL +IN –VS OUT –IN +VSVH VL 4 53 2 8 7 2 8 7 6 6 3 4 5 0.050 (1.27) 0.046 (1.17) 0.050 (1.27) 0.046 (1.17) ORDERING GUIDE Temperature Package Package Model Range Description Option AD8036AN –40°C to +85°C Plastic DIP N-8 AD8036AR –40°C to +85°C SOIC SO-8 AD8036AR-REEL –40°C to +85°C 13" Tape and Reel SO-8 AD8036AR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8 AD8036ACHIPS –40°C to +85°C Die AD8036-EB Evaluation Board 5962-9559701MPA –55°C to +125°C Cerdip Q-8 AD8037AN –40°C to +85°C Plastic DIP N-8 AD8037AR –40°C to +85°C SOIC SO-8 AD8037AR-REEL –40°C to +85°C 13" Tape and Reel SO-8 AD8037AR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8 AD8037ACHIPS –40°C to +85°C Die AD8037-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 AD8036/AD8037 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

Page 5

REV. B–4– AD8036/AD8037 +VS RL = 100 –VS 49.9 VIN RF 130 VOUT 0.1F 10F AD8036 0.1F 10F PULSE GENERATOR TR/TF = 350ps TPC 1. Noninverting Configuration, G = +1 TPC 2. Large Signal Transient Response; VO = 4 V p-p, G = +1, RF = 140 Ω TPC 3. Small Signal Transient Response; VO = 400 mV p-p, G = +1, RF = 140 Ω AD8036–Typical Characteristics +VS RL = 100 –VS 49.9 VIN RF 130 VOUT 0.1F 10F AD8036 0.1F 10F PULSE GENERATOR TR/TF = 350ps +VH VL 0.1F 0.1F TPC 4. Noninverting Clamp Configuration, G = +1 TPC 5. Clamped Large Signal Transient Response (2× Overdrive); VO = 2 V p-p, G = +1, RF = 140 Ω, VH = +1 V, VL = –1 V TPC 6. Clamped Small Signal Transient Response (2× Overdrive); VO = 400 mV p-p, G = +1, RF = 140 Ω, VH = +0.2 V, VL = –0.2 V

Page 6

AD8036/AD8037 REV. B –5– AD8037–Typical Characteristics RIN +VS RL = 100 –VS 49.9 VIN RF 100 VOUT 0.1F 10F AD8037 0.1F 10F PULSE GENERATOR TR/TF = 350ps TPC 7. Noninverting Configuration, G = +2 TPC 8. Large Signal Transient Response; VO = 4 V p-p, G = +2, RF = RIN = 274 Ω TPC 9. Small Signal Transient Response; VO = 400 mV p-p, G = +2, RF = RIN = 274 Ω RIN +VS RL = 100 –VS 49.9 VIN RF 100 VOUT 0.1F 10F AD8037 0.1F 10F PULSE GENERATOR TR/TF = 350ps +VH VL 0.1F 0.1F TPC 10. Noninverting Clamp Configuration, G = +2 TPC 11. Clamped Large Signal Transient Response (2× Overdrive); VO = 2 V p-p, G = +2, RF = RIN = 274 Ω, VH = +0.5 V, VL = –0.5 V TPC 12. Clamped Small Signal Transient Response (2× Overdrive); VO = 400 mV p-p, G = +2, RF = RIN = 274 Ω, VH = +0.1 V, VL = –0.1 V

Page 7

REV. B–6– AD8036/AD8037 AD8036–Typical Characteristics 200 140 G A IN – d B 102 49.9 1M FREQUENCY – Hz 10M 100M 1G VO = 300mV p-p VS =
5V RL = 100 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 TPC 13. AD8036 Small Signal Frequency Response, G = +1 1M 158 140 150 10M 100M 1G G A IN – d B VO = 300mV p-p VS =
5V RL = 100 130 –0.8 –0.7 –0.6 –0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 0.2 FREQUENCY – Hz TPC 14. AD8036 0.1 dB Flatness, N Package (for R Package Add 20 Ω to RF) 60 10 10k 100k 10M1M 30 20 40 50 FREQUENCY – Hz O P E N - L O O P G A IN – d B 0 –10 100M 1G 100 20 0 –20 40 60 80 –80 –100 –120 –60 –40 90 70 80 –20 P H A S E M A R G IN – D e g re e s GAIN PHASE TPC 15. AD8036 Open-Loop Gain and Phase Margin vs. Frequency, RL = 100 Ω VALUE OF FEEDBACK RESISTOR (RF) –  – 3 d B B A N D W ID T H – M H z 20 24040 200 2201801601401201008060 R PACKAGE RF 130 AD8036 VS =
5V RL = 100 GAIN = +1 RL 49.9 N PACKAGE 400 350 300 250 200 TPC 16. AD8036 Small Signal –3 dB Bandwidth vs. RF O U T P U T – d B 1M FREQUENCY – Hz 10M 100M 1G 250 RF = 50 TO 250 BY 50 50 VS =
5V VO = 2.5V p-p RL = 100 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 TPC 17. AD8036 Large Signal Frequency Response, G = +1 FREQUENCY – Hz G A IN – d B 1M 10M 100M 1G100k VS =
5V VO = 300mV p-p RL = 100 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 140 VH 100 VL (VIN) (VO) 1V AD8036 TPC 18. AD8036 Clamp Input Bandwidth, VH, VL

Page 8

AD8036/AD8037 REV. B –7– –30 –130 100k 100M10M1M10k –70 –50 –110 –90 FREQUENCY – Hz H A R M O N IC D IS T O R T IO N – d B c VO = 2V p-p VS =
5V RL = 500 G = +1 2ND HARMONIC 3RD HARMONIC TPC 19. AD8036 Harmonic Distortion vs. Frequency, RL = 500 Ω –30 –130 100k 100M10M1M10k –70 –50 –110 –90 FREQUENCY – Hz H A R M O N IC D IS T O R T IO N – d B c VO = 2V p-p VS =
5V RL = 100 G = +1 2ND HARMONIC 3RD HARMONIC TPC 20. AD8036 Harmonic Distortion vs. Frequency, RL = 100 Ω 50 30 10 100 20 40 FREQUENCY – MHz IN T E R C E P T – + d B m 60 20 40 8060 TPC 21. AD8036 Third Order Intercept vs. Frequency D IF F G A IN – % 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th D IF F P H A S E – D e g re e s 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 0.04 0.02 0.00 –0.02 –0.04 0.04 0.02 0.00 –0.02 –0.04 0.06 –0.06 TPC 22. AD8036 Differential Gain and Phase Error, G = +1, RL = 150 Ω, F = 3.58 MHz SETTLING TIME – ns 0 5 10 15 20 25 30 35 40 45 E R R O R – % –0.05 –0.04 –0.03 –0.02 –0.01 0 0.01 0.02 0.03 0.04 0.05 TPC 23. AD8036 Short-Term Settling Time to 0.01%, 2 V Step, G = +1, RL = 100 Ω SETTLING TIME - s 0 2 4 6 8 10 12 14 16 18 E R R O R – % –0.6 –0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 0.2 0.3 0.4 TPC 24. AD8036 Long-Term Settling Time, 2 V Step, G = +1, RL = 100 Ω

Page 9

REV. B–8– AD8036/AD8037 1M FREQUENCY – Hz 475 174 374 10M 100M 1G VO = 300mV p-p VS =
5V RL = 100 274 G A IN – d B –2 –1 0 1 2 3 4 5 6 7 8 TPC 25. AD8037 Small Signal Frequency Response, G = +2 301 224 274 VO = 3.00mV p-p VS =
5V RL = 100 249 1M FREQUENCY – Hz 10M 100M 1G G A IN – d B –0.8 –0.7 –0.6 –0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 0.2 TPC 26. AD8037 0.1 dB Flatness, N Package (for R Package Add 20 Ω to RF) –5 65 25 –15 10k 100k 1G100M10M1M 35 45 55 5 15 FREQUENCY – Hz 60 20 30 40 50 –10 0 10 O P E N - L O O P G A IN – d B –50 –250 0 50 100 –200 –150 –100 P H A S E M A R G IN – D e g re e s GAIN PHASE TPC 27. AD8037 Open-Loop Gain and Phase Margin vs. Frequency, RL = 100 Ω AD8037–Typical Characteristics 200 150 100 550500450400350300250200150 250 300 350 VALUE OF RF,RIN –  – 3 d B B A N D W ID T H – M H z VS =
5V RL = 100 GAIN = +2 RF AD8037 RL RIN 100 49.9 N PACKAGER PACKAGE TPC 28. AD8037 Small Signal –3 dB Bandwidth vs. RF, RIN RF = 475 RF = 75 TO 475 BY 100 VO = 3.5 V p-p VS =
5V RL = 100 RF = 75 1M FREQUENCY – Hz 10M 100M 1G G A IN – d B –2 –1 0 1 2 3 4 5 6 7 8 TPC 29. AD8037 Large Signal Frequency Response, G = +2 FREQUENCY – Hz G A IN – d B VS =
5V VO = 300mV p-p RL = 100 274 VH 100 AD8037 VL (VIN) (VO) 1V 274 100k 1M 10M 100M 1G –2 –1 0 1 2 3 4 5 6 7 8 TPC 30. AD8037 Clamp Input Bandwidth, VH, VL

Page 10

AD8036/AD8037 REV. B –9– –30 –130 100k 100M10M1M10k –70 –50 –110 –90 FREQUENCY – Hz H A R M O N IC D IS T O R T IO N – d B c VO = 2V p-p VS =
5V RL = 500 G = +2 2ND HARMONIC 3RD HARMONIC TPC 31. AD8037 Harmonic Distortion vs. Frequency, RL = 500 Ω –30 –130 100k 100M10M1M10k –70 –50 –110 –90 FREQUENCY – Hz H A R M O N IC D IS T O R T IO N – d B c VO = 2V p-p VS =
5V RL = 100 G = +2 2ND HARMONIC 3RD HARMONIC TPC 32. AD8037 Harmonic Distortion vs. Frequency, RL = 100 Ω 50 30 10 100 20 40 FREQUENCY – MHz IN T E R C E P T – + d B m 60 20 40 8060 TPC 33. AD8037 Third Order Intercept vs. Frequency D IF F G A IN – % 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th D IF F P H A S E – D e g re e s 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 0.03 0.02 0.01 0.00 –0.01 –0.02 –0.03 0.03 0.02 0.01 0.00 –0.01 –0.02 –0.03 TPC 34. AD8037 Differential Gain and Phase Error G = +2, RL = 150 Ω, F = 3.58 MHz SETTLING TIME – ns 0 5 10 15 20 25 30 35 40 45 E R R O R – % –0.05 –0.04 –0.03 –0.02 –0.01 0 –0.01 –0.02 –0.03 –0.04 –0.05 TPC 35. AD8037 Short-Term Settling Time to 0.01%, 2 V Step, G = +2, RL = 100 Ω SETTLING TIME – s 0 2 4 6 8 10 12 14 16 18 E R R O R – % –0.6 –0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 0.2 0.3 0.4 TPC 36. AD8037 Long-Term Settling Time 2 V Step, RL = 100 Ω