THS3491

THS3491 SBOS875C – AUGUST 2017 – REVISED FEBRUARY 2023 THS3491 900-MHz, 500-mA High-Power Output Current Feedback Amplifier 1 Features Bandwidth: – 900 MHz (VO = 2 VPP, AV = 5 V/V) – 320 MHz (VO = 10 VPP, AV = 5 V/V) Slew rate: 8000 V/µs (VO = 20 VPP) Input voltage noise: 1.7 nV/√ Hz Bipolar supply range: ±7 V to ±16 V Single-supply range: 14 V to 32 V Output swing: 28 VPP (±16-V supplies, 100-Ω load) Linear output current: ±420 mA (typical) 16.8-mA trimmed supply current (low temperature coefficient) HD2 and HD3: less than –75 dBc (50 MHz, VO = 10 VPP, 100-Ω load) Rise and fall time: 1.3 ns (10-V step) Overshoot: 1.5% (10-V step, AV = 5 V/V) Current limit and thermal shutdown protection Power down feature 2 Applications High-voltage, arbitrary waveform generators Pattern generators for LCD testers Output drivers for LCR meters Power FET drivers High capacitive load piezo element drivers VDSL line drivers Pin-compatible upgrade to THS3095 (DDA) 3 Description The THS3491 current feedback amplifier (CFA) provides a new level of performance for applications requiring the lowest distortion at high output power levels from DC through values greater than 100 MHz at 100-Ω loads. Although specified at a gain of 5 V/V, this current feedback design holds near constant bandwidth and distortion over a wide range of gains. The 8000 V/µs of slew rate delivers an output of 10 VPP into demanding loads with low distortion through 100 MHz. The 900-MH...