1 GHz Fully Differential Amplifier

LMH6552 1 GHz Fully Differential Amplifier April 2007 LMH6552 1 GHz Fully Differential Amplifier General Description The LMH6552 is a high performance fully differential amplifier designed to provide the exceptional signal fidelity and wide large-signal bandwidth necessary for driving 8 to 14 bit high speed data acquisition systems. Using National's proprietary differential current mode input stage architecture, the LMH6552 allows operation at gains greater than unity without sacrificing response flatness, bandwidth, harmonic distortion, or output noise performance. With external gain set resistors and integrated common mode feedback, the LMH6552 can be configured as either a differential input to differential output or single ended input to differential output gain block. The LMH6552 can be AC or DC coupled at the input which makes it suitable for a wide range of applications including communication systems and high speed oscilloscope front ends. The LMH6552 is available in an 8-pin SOIC package as well as a space saving, thermally enhanced 8-pin LLP package for higher performance. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ 1.0 GHz bandwidth @ AV = 1 800 MHz bandwidth @ AV = 4 450 MHz 0.1 dB flatness 3800 V/µs slew rate 10 ns settling time to 0.1% −90 dB THD @ 20 MHz −74 dB THD @ 70 MHz 20 ns enable/shutdown pin 5 to 12V operation Applications ■ ■ ■ ■ ■ ■ ■ Differential ADC driver Video over twisted pair Differential line driver Single end to differential converter High speed differential signaling IF/RF amplifier SAW filter buffer/driver Typical Application Single-Ended Input Differential Output 30003544 LMH™ is a trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation 300035 www.national.com LMH6552 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 6) Human Body Model Machine Model Supply Voltage Common Mode Input Voltage Maximum Input Current (pins 1, 2, 7, 8) Maximum Output Current (pins 4, 5) Soldering Information 2000V 200V 13.2V ±VS 30 mA (Note 4) Infrared or Convection (20 sec) Wave Soldering (10 sec) 235°C 260°C Operating Ratings Operating Temperature Range (Note 3) Storage Temperature Range Total Supply Voltage (Note 1) −40°C to +85°C −65°C to +150°C 4.5V to 12V 150°C/W Package Thermal Resistance (θJA) (Note 5) 8-Pin SOIC ±5V Electrical Characteristics Symbol Parameter (Note 2) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +5V, V− = −5V, AV= 1, VCM = 0V, RF = RG = 357Ω, RL = 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes. Conditions Min (Note 8) Typ (Note 7) 1000 930 810 590 950 820 740 590 450 3800 750 10 −92 −74 −93 −84 −87 1.1 19.5 10.3 60 VCM = 0V, VID = 0V, IBoffset = (IB− - IB+)/2 DC, VCM = 0V, VID = 0V Differential Differential CMRR > 38 dB ±3.5 2.47 80 15 0.5 ±3.8 110 18 dBc dBc nV/ pA/ dB µA µA dBc Ω pF V dBc MHz V/μs ps ns MHz MHz Max (Note 8) Units AC Performance (Differential) SSBW Small Signal −3 dB Bandwidth (Note 8) VOUT = 0.2 VPP, AV = 1 VOUT = 0.2 VPP, AV = 2 VOUT = 0.2 VPP, AV = 4 VOUT = 0.2 VPP, AV = 8 LSBW Large Signal −3 dB Bandwidth VOUT = 2 VPP, AV = 1 VOUT = 2 VPP, AV = 2 VOUT = 2 VPP, AV = 4 VOUT = 2 VPP, AV = 8 0.1 dB Bandwidth Slew Rate Rise/Fall Time, 10%-90% 0.1% Settling Time Distortion and Noise Response HD2 2nd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL = 800Ω VOUT = 2 VPP, f = 70 MHz, RL = 800Ω HD3 3rd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL = 800Ω VOUT = 2 VPP, f = 70 MHz, RL = 800Ω IMD3 Two-Tone Intermodulation Input Noise Voltage Input Noise Current Noise Figure (See Figure 5) Input Characteristics IBI IBoffset CMRR RIN CIN CMVR Input Bias Current (Note 10) Input Bias Current Differential (Note 7) Common Mode Rejection Ratio (Note 7) Input Resistance Input Capacitance Input Common Mode Voltage Range Freq >70 MHz, Third Order Products, VOUT = 2 VPP Composite f ≥ 1 MHz f ≥ 1 MHz 50Ω System, AV = 9, 10 MHz VOUT = 0.2 VPP, AV = 1 4V Step, AV = 1 2V Step 2V Step www.national.com 2 LMH6552 Symbol Output Performance Parameter Conditions Min (Note 8) 14.8 ±70 Typ (Note 7) 15.4 ±80 ±141 -60 Max (Note 8) Units Output Voltage Swing (Note 7) IOUT ISC Linear Output Current (Note 7) Short Circuit Current Output Balance Error Miscellaneous Performance ZT PSRR IS Open Loop Transimpedance Power Supply Rejection Ratio Supply Current (Note 7) Enable Voltage Threshold Disable Voltage Threshold Enable/Disable time ISD Disable Shutdown Current Common Mode Small Signal Bandwidth Slew Rate VOSCM Input Offset Voltage Input Bias Current Voltage Range CMRR Input Resistance Gain Output Common Mode Control Circuit Differential Output VOUT = 0V One Output Shorted to Ground VIN = 2V Single Ended (Note 6) ΔVOUT Common Mode /ΔVOUT Differential , ΔVOD = 1V, f < 1 MHz Differential DC, ΔVS = ±1V RL = ∞ VPP mA mA dB 108 80 19 3.0 2.0 15 500 600 22.5 25 28 dBΩ dB mA V V ns μA MHz V/μs ±16.5 ±8 mV µA V dB kΩ 1.012 V/V VIN+ = VIN− = 0 VIN+ = VIN− = 0 Common Mode, VID = 0, VCM = 0 (Note 9) ±3.7 Measure VOD, VID = 0V ΔVO,CM/ΔVCM (Note 2) 0.995 400 607 1.5 −3.2 ±3.8 80 200 1.0 ±2.5V Electrical Characteristics Symbol SSBW Parameter Small Signal −3 dB Bandwidth (Note 8) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +2.5V, V− = −2.5V, AV = 1, VCM = 0V, RF = RG = 357Ω, RL = 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes. Conditions VOUT = 0.2 VPP, AV = 1 VOUT = 0.2 VPP, AV = 2 VOUT = 0.2 VPP, AV = 4 VOUT = 0.2 VPP, AV = 8 LSBW Large Signal −3 dB Bandwidth VOUT = 2 VPP, AV = 1 VOUT = 2 VPP, AV = 2 VOUT = 2 VPP, AV = 4 VOUT = 2 VPP, AV = 8 0.1 dB Bandwidth Slew Rate Rise/Fall Time, 10% to 90% 0.1% Settling Time Distortion and Noise Response HD2 2nd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL = 800Ω VOUT = 2 VPP, f = 70 MHz, RL = 800Ω 82 65 dBc VOUT = 0.2 VPP, AV = 1 2V Step, AV = 1 2V Step 2V Step Min (Note 8) Typ (Note 7) 800 740 660 498 690 620 589 480 300 2100 1.2 10 MHz V/μs ns ns MHz MHz Max (Note 8) Units 3 www.national.com LMH6552 Symbol HD3 Parameter 3rd Harmonic Distortion Conditions VOUT = 2 VPP, f = 20 MHz, RL = 800Ω VOUT = 2 VPP, f = 70 MHz, RL = 800Ω f ≥ 70 MHz, Third Order Products, VOUT = 2 VPP Composite f ≥ 1 MHz f ≥ 1 MHz 50Ω System, AV = 9, 10 MHz Min (Note 8) Typ (Note 7) 79 67 −77 1.1 19.5 10.2 54 Max (Note 8) Units dBc dBc IMD3 Two-Tone Intermodulation Input Noise Voltage Input Noise Current Noise Figure (See Figure 5) nV/ pA/ dB 90 18 µA μA dBc Ω pF V VPP mA mA dB Input Characteristics IBI IBoffset CMRR RIN CIN CMVR Input Bias Current (Note 10) Input Bias Current Differential (Note 7) Common-Mode Rejection Ratio (Note 7) Input Resistance Input Capacitance Input Common Mode Range Output Voltage Swing (Note 7) IOUT ISC Linear Output Current (Note 7) Short Circuit Current Output Balance Error Miscellaneous Performance ZT PSRR IS Open Loop Transimpedance Power Supply Rejection Ratio Supply Current (Note 7) Enable Voltage Threshold Disable Voltage Threshold Enable/Disable time ISD Disable Shutdown Current Common Mode Small Signal Bandwidth Slew Rate VOSCM Input Offset Voltage Input Bias Current Voltage Range CMRR Input Resistance Gain ΔVO,CM/ΔVCM 0.995 Measure VOD, VID = 0V VIN+ = VIN− = 0 VIN+ = VIN− = 0 Common Mode, VID = 0, VCM = 0 (Note 9) ±1.19 Output Common Mode Control Circuit 310 430 1.65 −2.9 ±1.25 80 200 1.0 1.012 ±15 MHz V/μs mV µA V dB kΩ V/V 15 500 600 Differential DC, ΔVS = ±1V RL = ∞ 17 3.0 2.0 107 80 20.4 24 27 dBΩ dB mA V V ns µA VCM = 0V, VID = 0V, IBoffset = (IB− - IB+ )/2 DC, VCM = 0V, VID = 0V Differential Differential CMRR > 38 dB Differential Output VOUT = 0V One Output Shorted to Ground, VIN = 2V Single Ended (Note 6) ΔVOUT Common Mode /ΔVOUT Differential , ΔVOD = 1V, f < 1 MHz 1.5-3.5 5.6 ±55 2.3 75 15 0.5 1.2-3.8 6.0 ±65 ±131 60 Output Performance www.national.com 4 LMH6552 Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications, see the Electrical Characteristics tables. Note 2: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where TJ > TA. See Applications Section for information on temperature de-rating of this device." Min/Max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Note 3: The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX)– TA) / θJA. All numbers apply for packages soldered directly onto a PC Board. Note 4: The maximum output current (IOUT) is determined by device power dissipation limitations. See the Power Dissipation section of the Application Section for more details. Note 5: Human Body Model, applicable std. MIL-STD-883, Method 30157. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC). FieldInduced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC). Note 6: Short circuit current should be limited in duration to no more than 10 seconds. See the Power Dissipation section of the Application Information for more details. Note 7: Typical values represent the most likely parametric norm as determined at the t