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ADA4960-1 Datasheet(PDF) 1 Page - Analog Devices |
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ADA4960-1 Datasheet(HTML) 1 Page - Analog Devices |
1 / 19 page 5 GHz, Low Distortion ADC Driver/Line Driver Data Sheet ADA4960-1 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2010–2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES −3 dB bandwidth of 5 GHz (A V = 6 dB) Single resistor programmable gain: 0 dB to 18 dB Differential or single-ended input to differential output Low harmonic distortion (HD2/HD3 @ A V = 6 dB) −88/−69 dBc @ 250 MHz −77/−66 dBc @ 500 MHz −73/−72 dBc @ 1 GHz IMD3 @ 1 GHz = −63 dBc Slew rate 8700 V/µs (A V = 6 dB, 2 V step) 6600 V/μs (A V = 18 dB, 2 V step) Fast settling: 1 ns to 1%, 1.4 ns to 0.1% Fast overdrive recovery: 6.7 ns to 1%, 9.3 ns to 0.5% Single-supply operation: 5 V 0.1 dB gain flatness to 300 MHz DC level translation Available in 16-lead LFCSP APPLICATIONS Differential ADC drivers for giga-sample ADCs GBPS line drivers with pre-emphasis High speed data acquisition Electronic surveillance countermeasures Pulse capture and conditioning Oscilloscopes Satellite communications Single-ended-to-differential converters RF/IF gain blocks FUNCTIONAL BLOCK DIAGRAM IIP VIP PD VCC VOCM VOP VON GND IIN VIN RG BIAS CELL ADA4960-1 Figure 1. 1.2 1.0 0.8 0.6 0.4 0.2 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 0 –0.2 0 0.2 AV = 6dB AV = 18dB 0.4 0.6 0.8 1.0 TIME (ns) 80% 20% AV = 12dB AV (dB) SLEW RATE (V/µs) 8700 7700 6 12 18 6600 Figure 2. Rise Time, VOUT = 2 V p-p, TA = 25°C, For AV = 6 dB, AV = 12 dB, and AV = 18 dB GENERAL DESCRIPTION The ADA4960-1 is a high performance, differential amplifier optimized for RF and IF applications. It achieves better than 63 dB IMD3 performance for frequencies up to and beyond 1 GHz, making it an ideal driver for 8-bit to 10-bit giga-sample analog- to-digital converters (ADCs). The buffered inputs of the ADA4960-1 isolate the gain-setting resistor (R G) from the signal inputs, maintaining a constant 10 kΩ input resistance, easing matching and input drive requirements. The ADA4960-1 has a nominal 150 Ω differential output impedance. The ADA4960-1 is optimized for wideband, low distortion performance for frequencies up to and beyond 1 GHz. These attributes, together with its adjustable gain capability, make this device the amplifier of choice for general-purpose IF and broad- band applications where low distortion, noise, and power are critical. The device is optimized for the best combination of slew rate, bandwidth, and broadband distortion. These attributes allow it to drive a wide variety of ADCs. It is ideally suited for driving mixers, pin diode attenuators, SAW filters, and multi-element discrete devices. The user accessible gain adjust and bandwidth extension features allow configuration of the ADA4960-1 for line driver and channel equalization applications. The quiescent current of the ADA4960-1 is typically 60 mA. When disabled, it consumes less than 3 mA, offering excellent input-to- output isolation. Fabricated on an Analog Devices, Inc., high speed SiGe process, the ADA4960-1 is available in a compact 3 mm × 3 mm, 16-lead LFCSP. It operates over the temperature range of −40°C to +85°C. |
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