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OPA846IDR Datasheet(PDF) 1 Page - Texas Instruments |
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OPA846IDR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page www.ti.com Wideband, Low-Noise, Voltage-Feedback OPERATIONAL AMPLIFIER APPLICATIONS q HIGH DYNAMIC RANGE ADC PREAMPS q LOW-NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS q WIDEBAND, HIGH GAIN AMPLIFIERS q LOW-NOISE DIFFERENTIAL RECEIVERS q VDSL LINE RECEIVERS q ULTRASOUND CHANNEL AMPLIFIERS q SECURITY SENSOR FRONT ENDS q UPGRADE FOR THE OPA686, CLC425, AND LMH6624 FEATURES q HIGH BANDWIDTH: 400MHz (G = +10) q LOW INPUT VOLTAGE NOISE: 1.2nV/ √Hz q VERY LOW DISTORTION: –100dBc (5MHz) q HIGH SLEW RATE: 625V/ µs q HIGH DC ACCURACY: V IO ±150µV q LOW SUPPLY CURRENT: 12.6mA q HIGH GAIN BANDWIDTH PRODUCT: 1750MHz q STABLE FOR GAINS ≥ 7 DESCRIPTION The OPA846 combines very high gain bandwidth and large signal performance with very low input voltage noise, while dissipating a low 12.6mA supply current. The classical differ- ential input stage, along with two stages of forward gain and a high power output stage, combine to make the OPA846 an exceptionally low distortion amplifier with excellent DC accu- racy and output drive. The voltage-feedback architecture allows all standard op amp applications to be implemented with very high performance. The combination of low input voltage and current noise, along with a 1.75GHz gain bandwidth product, make the OPA846 an ideal amplifier for wideband transimpedance stages. As a voltage gain stage, the OPA846 is optimized for a flat response at a gain of +10 and is stable down to a gain of +7. High Gain, 20MHz Transimpedance Amplifier A new external compensation technique can be used to give a very flat frequency response below the minimum stable gain for the OPA846, further improving its already excep- tional distortion performance. Using this compensation makes the OPA846 one of the premier 12- to 16-bit Analog-to-Digital (A/D) converter input drivers. The supply current for the OPA846 is precisely trimmed to 12.6mA at +25 °C. This, along with carefully defined supply current tempco in the input and output stages, combine to provide exceptional performance over the full specified temperature range. OPA846 RELATED PRODUCTS INPUT NOISE GAIN BANDWIDTH SINGLES VOLTAGE (nV/ √Hz ) PRODUCT (MHz) OPA842 2.4 200 OPA843 2.0 800 OPA847 0.85 3900 OPA846 SBOS250E – JULY 2002 – REVISED DECEMBER 2008 www.ti.com 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. Copyright © 2002-2008, Texas Instruments Incorporated OPA846 +5V –5V V O 50k Ω 0.1 µF 100pF 50k Ω 0.2pF 10pF Photodiode I S –V B Power-supply decoupling not shown. λ 100 95 90 85 80 75 70 65 60 Frequency (MHz) WIDEBAND TRANSIMPEDANCE 0.1 1 10 100 20 log(50k Ω) = 94dBΩ OPA846 OPA8 46 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. All trademarks are the property of their respective owners. |
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