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OPA2381AIDRBR Datasheet(PDF) 1 Page - Burr-Brown (TI) |
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OPA2381AIDRBR Datasheet(HTML) 1 Page - Burr-Brown (TI) |
1 / 19 page FEATURES D OVER 250kHz TRANSIMPEDANCE BANDWIDTH D DYNAMIC RANGE: 5 Decades D EXCELLENT LONG-TERM STABILITY D LOW VOLTAGE NOISE: 10nV/√Hz D BIAS CURRENT: 3pA D OFFSET VOLTAGE: 25µV (max) D OFFSET DRIFT: 0.1µV/°C (max) D GAIN BANDWIDTH: 18MHz D QUIESCENT CURRENT: 800µA D FAST OVERLOAD RECOVERY D SUPPLY RANGE: 2.7V to 5.5V D SINGLE AND DUAL VERSIONS D MicroPACKAGE: DFN-8, MSOP-8 APPLICATIONS D PRECISION I/V CONVERSION D PHOTODIODE MONITORING D OPTICAL AMPLIFIERS D CAT-SCANNER FRONT-END D PHOTO LAB EQUIPMENT 1M Ω R F 100k Ω +5V 7 2 3 4 6 OPA381 65pF 75pF C DIO DE −5V R P (Optional Pulldown Resistor) VOUT (0V to 4.4V) Photodiode DESCRIPTION The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25 µV (max), offset drift of 0.1 µV/°C (max), and bias current of 3pA. The OPA381 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 18MHz GBW of the OPA381 enables a trans- impedance bandwidth of > 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber. As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents on the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V. The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40 °C to +125°C. OPA381 RELATED DEVICES PRODUCT FEATURES OPA380 90MHz GBW, 2.7V to 5.5V Supply Transimpedance Amplifier OPA132 16MHz GBW, Precision FET Op Amp ±15V OPA300 150MHz GBW, Low-Noise, 2.7V to 5.5V Supply OPA335 10 µV VOS, Zero-Drift, 2.5V to 5V Supply OPA350 500 µV VOS, 38MHz, 2.5V to 5V Supply OPA354 100MHz GBW CMOS, RRIO, 2.5V to 5V Supply OPA355 200MHz GBW CMOS, 2.5V to 5V Supply OPA656/7 230MHz, Precision FET, ±5V OPA381 OPA2381 SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004 Precision, Low Power, 18MHz 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 2004, 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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