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OPA381AIDRBR Datasheet

  • OPA381AIDRBR

  • Precision, Low Power, 18MHz Transimpedance Amplifier

  • 487.29KB

  • 19頁

  • BB

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OPA381
OPA2381
SBOS313B 鈭?AUGUST 2004 鈭?REVISED NOVEMBER 2004
Precision, Low Power, 18MHz
Transimpedance Amplifier
FEATURES
D
OVER 250kHz TRANSIMPEDANCE
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
BANDWIDTH
DYNAMIC RANGE: 5 Decades
EXCELLENT LONG-TERM STABILITY
LOW VOLTAGE NOISE: 10nV/鈭欻z
BIAS CURRENT: 3pA
OFFSET VOLTAGE: 25碌V (max)
OFFSET DRIFT: 0.1碌V/擄C (max)
GAIN BANDWIDTH: 18MHz
QUIESCENT CURRENT: 800碌A(chǔ)
FAST OVERLOAD RECOVERY
SUPPLY RANGE: 2.7V to 5.5V
SINGLE AND DUAL VERSIONS
MicroPACKAGE:
DFN-8, MSOP-8
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碌V (max), offset
drift of 0.1碌V/擄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
鈥?V, 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 鈥?0擄C to +125擄C.
APPLICATIONS
PRECISION I/V CONVERSION
PHOTODIODE MONITORING
OPTICAL AMPLIFIERS
CAT-SCANNER FRONT-END
PHOTO LAB EQUIPMENT
R
F
+5V
7
2
OPA381 RELATED DEVICES
OPA381
6
VOUT
(0V to 4.4V)
PRODUCT
OPA380
FEATURES
90MHz GBW, 2.7V to 5.5V Supply
Transimpedance Amplifier
16MHz GBW, Precision FET Op Amp
鹵15V
150MHz GBW, Low-Noise, 2.7V to 5.5V Supply
10碌V VOS, Zero-Drift, 2.5V to 5V Supply
500碌V VOS, 38MHz, 2.5V to 5V Supply
100MHz GBW CMOS, RRIO, 2.5V to 5V Supply
200MHz GBW CMOS, 2.5V to 5V Supply
230MHz, Precision FET,
鹵5V
C
DIO DE
Photodiode
1M
鈩?/div>
65pF
鈭?V
100k鈩?/div>
3
75pF
R
P
(Optional
Pulldown
Resistor)
OPA132
OPA300
OPA335
OPA350
OPA354
OPA355
OPA656/7
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.
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.
Copyright
錚?/div>
2004, Texas Instruments Incorporated
www.ti.com

OPA381AIDRBR 產(chǎn)品屬性

  • 3,000

  • 集成電路 (IC)

  • Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

  • -

  • 轉(zhuǎn)阻

  • 1

  • -

  • 12 V/µs

  • 18MHz

  • -

  • 3pA

  • 7µV

  • 800µA

  • 10mA

  • 2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V

  • -40°C ~ 125°C

  • 表面貼裝

  • 8-VDFN 裸露焊盤

  • 8-SON 裸露焊盤（3x3）

  • 帶卷 (TR)

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