OPA381AIDGKT
ActiveOP AMP SINGLE LOW OFFSET VOLTAGE AMPLIFIER R-R O/P 5.5V 8-PIN VSSOP T/R
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OPA381AIDGKT
ActiveOP AMP SINGLE LOW OFFSET VOLTAGE AMPLIFIER R-R O/P 5.5V 8-PIN VSSOP T/R
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Technical Specifications
Parameters and characteristics for this part
| Specification | OPA381AIDGKT |
|---|---|
| Amplifier Type | Transimpedance |
| Current - Input Bias | 3 pA |
| Current - Output / Channel [custom] | 10 mA |
| Current - Supply | 800 çA |
| Gain Bandwidth Product | 18 MHz |
| Mounting Type | Surface Mount |
| Number of Circuits | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-MSOP, 8-TSSOP |
| Package / Case | 3 mm |
| Package / Case [custom] | 0.118 in |
| Slew Rate | 12 V/µs |
| Voltage - Input Offset | 7 µV |
| Voltage - Supply Span (Max) [Max] | 5.5 V |
| Voltage - Supply Span (Min) [Min] | 2.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.60 | |
| 10 | $ 2.33 | |||
| 25 | $ 2.20 | |||
| 100 | $ 1.87 | |||
| Digi-Reel® | 1 | $ 2.60 | ||
| 10 | $ 2.33 | |||
| 25 | $ 2.20 | |||
| 100 | $ 1.87 | |||
| Tape & Reel (TR) | 250 | $ 1.25 | ||
| 500 | $ 1.16 | |||
| 750 | $ 1.12 | |||
| 1250 | $ 1.09 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.95 | |
| 100 | $ 1.61 | |||
| 250 | $ 1.16 | |||
| 1000 | $ 0.87 | |||
Description
General part information
OPA381 Series
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.
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 in 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.
Documents
Technical documentation and resources
