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OPA2381

更新时间： 2024-09-28 02:58:55
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德州仪器 - TI /
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24页 1007K
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Precision, Low Power, 18MHz Transimpedance Amplifier

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OPA2381 数据手册

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OPA381  
OPA2381  
SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004  
Precision, Low Power, 18MHz  
Transimpedance Amplifier  
FD EATURES  
DESCRIPTION  
OVER 250kHz TRANSIMPEDANCE  
BANDWIDTH  
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 25µV (max), offset  
drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381  
far exceeds the offset, drift, and noise performance that  
conventional JFET op amps provide.  
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DYNAMIC RANGE: 5 Decades  
EXCELLENT LONG-TERM STABILITY  
LOW VOLTAGE NOISE: 10nV/√Hz  
BIAS CURRENT: 3pA  
OFFSET VOLTAGE: 25µV (max)  
OFFSET DRIFT: 0.1µV/°C (max)  
GAIN BANDWIDTH: 18MHz  
QUIESCENT CURRENT: 800µA  
FAST OVERLOAD RECOVERY  
SUPPLY RANGE: 2.7V to 5.5V  
SINGLE AND DUAL VERSIONS  
MicroPACKAGE: DFN-8, MSOP-8  
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.  
AD PPLICATIONS  
PRECISION I/V CONVERSION  
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PHOTODIODE MONITORING  
OPTICAL AMPLIFIERS  
CAT-SCANNER FRONT-END  
PHOTO LAB EQUIPMENT  
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.  
RF  
+5V  
7
OPA381 RELATED DEVICES  
OPA381  
V
PRODUCT  
FEATURES  
2
OUT  
(0V to 4.4V)  
6
90MHz GBW, 2.7V to 5.5V Supply  
Transimpedance Amplifier  
OPA380  
CDIODE  
RP  
OPA132  
OPA300  
OPA335  
OPA350  
OPA354  
OPA355  
OPA656/7  
16MHz GBW, Precision FET Op Amp 15V  
150MHz GBW, Low-Noise, 2.7V to 5.5V Supply  
Photodiode  
(Optional  
Pulldown  
Resistor)  
65pF  
Ω
1M  
10µV V , Zero-Drift, 2.5V to 5V Supply  
OS  
−
5V  
500µV V , 38MHz, 2.5V to 5V Supply  
OS  
Ω
100k  
100MHz GBW CMOS, RRIO, 2.5V to 5V Supply  
200MHz GBW CMOS, 2.5V to 5V Supply  
230MHz, Precision FET, 5V  
3
75pF  
4
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.  
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ  
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ  
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ  
Copyright 2004, Texas Instruments Incorporated  
www.ti.com  
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OPA2381 替代型号

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