OPA653OPA653
www.ti.com...................................................................................................
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-...