OPA653

OPA653OPA653 www.ti.com........................................................................................................................................................................................... SBOS348 – DECEMBER 2008 Wideband, Fixed Gain, JFET-Input AMPLIFIER FEATURES 1 2 HIGH BANDWIDTH: 500 MHz (G = +2 V/V) HIGH SLEW RATE: 2675 V/µs (4-V Step) EXCELLENT THD: –71dBc at 10 MHz LOW INPUT VOLTAGE NOISE: 6.1 nV/√Hz FAST OVERDRIVE RECOVERY: 8 ns FAST SETTLING TIME (1% 4-V Step): 7.9 ns LOW INPUT OFFSET VOLTAGE: ±1 mV LOW INPUT BIAS CURRENT: ±10 pA HIGH INPUT IMPEDANCE: 1012 Ω||2.5 pF INTERNAL GAIN SETTING RESISTORS: G = +2 V/V or G = –1 V/V HIGH OUTPUT CURRENT: 70 mA APPLICATIONS TEST AND MEASUREMENT FRONT-END HIGH-INPUT IMPEDANCE PROBES DATA ACQUISITION CARDS OSCILLOSCOPE INPUT ADC INPUT AMPLIFIER NONINVERTING GAIN OF +2 V/V 50-W TEST ENVIRONMENT +6 V 50-W Source 49.9 W VIN+ VIN- 160 W VS+ OPA653 0.1 mF 10 mF VOUT 49.9 W 50-W Load 160 W VS-6 V 0.1 mF 10 mF Signal Gain (dB) SMALL-SIGNAL FREQUENCY RESPONSE 6 3 0 -3 -6 -9 -12 -15 -18 VO = 200 mVPP 100 k 1M 10 M Frequency (Hz) 100 M 1G DESCRIPTION The OPA653 combines a very wideband voltage-feedback operational amplifier with a JFET-input stage with internal gain setting resistors to achieve an ultra-high, dynamic-range amplifier for fixed gain of +2-V/V or –1-V/V applications. The 500-MHz wide gain of +2-V/V bandwidth is complemented by a very high 2675-...