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OPA380AID Datasheet(PDF) 1 Page - Texas Instruments |
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OPA380AID Datasheet(HTML) 1 Page - Texas Instruments |
1 / 22 page FEATURES D > 1MHz TRANSIMPEDANCE BANDWIDTH D EXCELLENT LONG-TERM VOS STABILITY D BIAS CURRENT: 50pA (max) D OFFSET VOLTAGE: 25µV (max) D DYNAMIC RANGE: 4 to 5 Decades D DRIFT: 0.1µV/°C (max) D GAIN BANDWIDTH: 90MHz D QUIESCENT CURRENT: 7.5mA D SUPPLY RANGE: 2.7V to 5.5V D SINGLE AND DUAL VERSIONS D MicroSize PACKAGE: MSOP-8 APPLICATIONS D PHOTODIODE MONITORING D PRECISION I/V CONVERSION D OPTICAL AMPLIFIERS D CAT-SCANNER FRONT-END 1M Ω R F 100k Ω +5V 7 2 3 4 6 OPA380 67pF 75pF −5V R P (Optional Pulldown Resistor) V OUT (0V to 4.4V) Photodiode DESCRIPTION The OPA380 family of transimpedance amplifiers provides high-speed (90MHz Gain Bandwidth [GBW]) operation, with extremely high precision, excellent long-term stability, and very low 1/f noise. It is ideally suited for high-speed photodiode applications. The OPA380 features an offset voltage of 25 µV, offset drift of 0.1µV/°C, and bias current of 50pA. The OPA380 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide. The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 90MHz GBW of the OPA380 enables a trans- impedance bandwidth of > 1MHz in most configurations. The OPA380 is ideally suited for fast control loops for power level on an optical fiber. As a result of the high precision and low-noise characteristics of the OPA380, a dynamic range of 4 to 5 decades can be achieved. For example, this capability allows the measurement of signal currents on the order of 1nA, and up to 100 µA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA380 provides very wide bandwidth throughout the full dynamic range. By using an external pull-down resistor to –5V, the output voltage range can be extended to include 0V. The OPA380 (single) is available in MSOP-8 and SO-8 packages. The OPA2380 (dual) is available in the miniature MSOP-8 package. They are specified from –40 °C to +125°C. OPA380 RELATED DEVICES PRODUCT FEATURES OPA300 150MHz CMOS, 2.7V to 5.5V Supply OPA350 500 µV VOS, 38MHz, 2.5V to 5V Supply OPA335 10 µV VOS, Zero-Drift, 2.5V to 5V Supply OPA132 16MHz GBW, Precision FET Op Amp, ±15V OPA656/7 230MHz, Precision FET, ±5V LOG112 LOG amp, 7.5 decades, ±4.5V to ±18V Supply LOG114 LOG amp, 7.5 decades, ±2.25V to ±5.5V Supply IVC102 Precision Switched Integrator DDC112 Dual Current Input, 20-Bit ADC OPA380 OPA2380 SBOS291G − NOVEMBER 2003 − REVISED SEPTEMBER 2007 Precision, High-Speed Transimpedance Amplifier 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 Copyright 2003-2007, Texas Instruments Incorporated All trademarks are the property of their respective owners. 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. |
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