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OPA843ID

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OPA843 OPA 843 www.ti.com SBOS268C – DECEMBER 2002 – DECEMBER 2008 Wideband, Low Distortion, Medium Gain, Voltage-Feedback OPERATIONAL AMPLIFIER FEATURES DESCRIPTION q HIGH BANDWIDTH: 260MHz (G = +5) The OPA843 provides a level of speed and dynamic range previously unattainable in a monolithic op amp. Using a high Gain Bandwidth (GBW), two gain-stage design, the OPA843 gives a medium gain range device with exceptional dynamic range. The “classic” differential input complements this high dynamic range with DC precision beyond most high-speed amplifier products. Very low input offset voltage and current, high Common-Mode Rejection Ratio (CMRR) and PowerSupply Rejection Ratio (PSRR), and high open-loop gain combine to give a high DC precision amplifier along with low noise and high 3rd-order intercept. q GAIN BANDWIDTH PRODUCT: 800MHz q LOW INPUT VOLTAGE NOISE: 2.0nV/ √Hz q VERY LOW DISTORTION: –96dBc (5MHz) q HIGH OPEN-LOOP GAIN: 110dB q FAST 12-BIT SETTLING: 10.5ns (0.01%) q LOW INPUT OFFSET VOLTAGE: 300µV q OUTPUT CURRENT: ±100mA 12- to 16-bit converter interfaces will benefit from this combination of features. High-speed transimpedance applications can be implemented with exceptional DC precision as well. Differential configurations using two OPA843s can deliver very low distortion to high output voltages, as shown below. APPLICATIONS q ADC/DAC BUFFER AMPLIFIER q LOW DISTORTION “IF” AMPLIFIER q ACTIVE FILTERS q LOW-NOISE RECEIVER OPA843 RELATED PRODUCTS q WIDEBAND TRANSIMPEDANCE SINGLES q PROFESSIONAL AUDIO q OPA643 UPGRADE INPUT NOISE VOLTAGE (nV/ √Hz ) GAIN-BANDWIDTH PRODUCT (MHz) OPA842 OPA846 OPA847 q TEST INSTRUMENTATION 2.6 1.2 0.85 200 1750 3900 +5V DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE OPA843 –85 VI 50Ω 1:1 132Ω 402Ω 40.2Ω 402Ω Harmonic Distortion (dBc) –5V 40.2Ω RL 400Ω VO = 10VI +5V GD = 10 RL = 400Ω F = 5MHz –90 –95 2nd-Harmonic –100 3rd-Harmonic –105 OPA843 –110 1 –5V 10 Output Voltage Swing (Vp-p) Very Low Distortion Differential Driver Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. Copyright © 2002-2008, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. www.ti.com

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