ADA4950-1

Low Power, Selectable Gain Differential ADC Driver, G = 1, 2, 3 ADA4950-1/ADA4950-2 FEATURES www.datasheet4u.com High performance at low power High speed −3 dB bandwidth of 750 MHz, G = 1 0.1 dB flatness to 210 MHz, VOUT, dm = 2 V p-p, RL, dm = 200 Ω Slew rate: 2900 V/μs, 25% to 75% Fast 0.1% settling time of 9 ns Low power: 9.5 mA per amplifier Low harmonic distortion 108 dB SFDR @ 10 MHz 98 dB SFDR @ 20 MHz Low output voltage noise: 9.2 nV/√Hz, G = 1, RTO ±0.2 mV typical input offset voltage Selectable differential gains of 1, 2, and 3 Differential-to-differential or single-ended-to-differential operation Adjustable output common-mode voltage Input common-mode range shifted down by 1 VBE Wide supply range: +3 V to ±5 V Available in 16-lead and 24-lead LFCSP packages FUNCTIONAL BLOCK DIAGRAMS 16 –VS 15 –VS 13 –VS 12 PD 11 –OUT 10 +OUT 9 VOCM +INB 1 +INA 2 –INA 3 +INB 4 ADA4950-1 14 –VS +VS 7 +VS 8 +VS 5 Figure 1. ADA4950-1 +INA1 +INB1 –VS1 –VS1 PD1 –OUT1 –INA1 –INB1 +VS1 +VS1 +INB2 +INA2 1 2 3 4 5 6 24 23 22 21 20 19 +VS 6 ADA4950-2 18 17 16 15 14 13 +OUT1 VOCM1 –VS2 –VS2 PD2 –OUT2 HARMONIC DISTORTION (dBc) ADC drivers Single-ended-to-differential converters IF and baseband gain blocks Differential buffers Line drivers Figure 2. ADA4950-2 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 1 10 FREQUENCY (MHz) 100 07957-025 VOUT, dm = 2V p-p GENERAL DESCRIPTION The ADA4950-1/ADA4950-2 are gain-selectable versions of the ADA4932-1/ADA4932-2 with on-chip feedback an...