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Texas Instruments OPA380AIDGKRG4
- Part No.:
- OPA380AIDGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA380AIDGKRG4.pdf
- Description:
- IC TRANSIMPEDANCE 1 CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
OPA380AIDGKRG4 from Texas Instruments is a precision transimpedance amplifier optimized for photodiode current-to-voltage conversion, featuring 90MHz gain bandwidth, 25µV max offset voltage, 50pA max input bias current, and 0.1µV/°C max drift-enabling high-fidelity optical signal conditioning in CAT-scan front-ends and fiber-optic power control loops.
For engineers reviewing the OPA380AIDGKRG4 datasheet, OPA380AIDGKRG4 pinout, OPA380AIDGKRG4 application, or OPA380AIDGKRG4 equivalent, key selection criteria include transimpedance bandwidth >1MHz with low-noise photodiode interfaces, single-supply operation from 2.7V to 5.5V, MSOP-8 package compatibility, and output swing extension to 0V using an external pulldown resistor.
Technical Context
The OPA380AIDGKRG4 employs an auto-zero architecture with a time-continuous 90MHz signal-path amplifier, zero-corrected every 100µs, delivering exceptional long-term VOS stability (≤1µV drift over 300h at 150°C) and minimal 1/f noise. Its internal overload recovery clamp enables 100ns return-to-linear operation after positive-rail saturation.
Designed exclusively for inverting transimpedance configurations, it uses the noninverting input as a fixed bias node and supports optional negative-rail pulldown (e.g., −5V via 2kΩ resistor) to extend output swing to 0V while maintaining linearity and accuracy across −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90MHz - enables >1MHz transimpedance bandwidth with typical photodiode capacitance and feedback resistors up to 10MΩ. |
| Input Offset Voltage | 25µV (max) - ensures ≤0.25% full-scale error in 10V-range I/V outputs, critical for precision optical power monitoring. |
| Input Bias Current | 50pA (max) - minimizes dark-current-induced offset in high-impedance photodiode circuits (e.g., 10MΩ RF). |
| Offset Drift | 0.1µV/°C (max) - guarantees <1µV total drift over industrial temperature range (−40°C to +125°C), supporting stable calibration. |
| Supply Range | 2.7V to 5.5V - supports direct integration into 3.3V and 5V systems without level-shifting or LDO overhead. |
| Output Swing (to GND) | 0V achievable with −5V pulldown resistor - enables true 0–4.4V output range for single-supply ADC interfacing without rail-to-rail op-amp compromises. |
| Quiescent Current | 7.5mA - balances speed and power efficiency for portable or thermally constrained optical sensor modules. |
Pinout & Package
OPA380AIDGKRG4 is housed in an MSOP-8 package (3.0mm × 3.0mm × 1.0mm), optimized for space-constrained optical sensor PCB layouts and compatible with standard 0.65mm pitch reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Must be left unconnected; no routing or thermal pad required. |
| 2 (V+) | Positive supply rail | Accepts 2.7V–5.5V; requires local 1µF ceramic bypass to ground per datasheet layout guidance. |
| 3 (Out) | Analog output | Drives 2kΩ load within 600mV of V+ and 100mV of V−; supports 0V output when pulldown resistor connects to −5V. |
| 4 (NC) | No internal connection | Must be left unconnected; not used for thermal dissipation. |
| 5 (NC) | No internal connection | Must be left unconnected; no internal bond wire or function. |
| 6 (−In) | Inverting input | Summing junction for photodiode cathode; ultra-low bias current (50pA max) preserves signal integrity in high-Z nodes. |
| 7 (+In) | Noninverting input | Fixed DC bias node (e.g., 0.5V); reverse-biases photodiode to reduce capacitance and improve speed. |
| 8 (V−) | Negative supply rail | Typically grounded in single-supply use; must be connected to −5V if pulldown configuration is implemented. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero topology with 90MHz signal path | Delivers 25µV VOS and 0.1µV/°C drift without sacrificing bandwidth-unlike chopper-stabilized amplifiers with switching artifacts. |
| Transimpedance bandwidth >1MHz | Validated across photodiode capacitances from 1pF to 100pF using standard feedback networks, enabling fast optical control loops. |
| Dynamic range: 4–5 decades | Supports simultaneous measurement of 1nA and 100µA photocurrents in one stage-eliminating need for programmable-gain or log-amp alternatives. |
| Output swing to 0V with external pulldown | Enables direct interface to 0–4.096V SAR ADCs without level-shifting circuitry or dual supplies. |
| ESD-protected inputs (2000V HBM) | Robust handling during assembly and field service; input clamps limit voltage to ±0.5V beyond rails with 10mA current limiting. |
Applications
| Photodiode Monitoring | Precision I/V Conversion |
|---|---|
Use Scenario: Real-time detection of low-light-level signals from silicon photodiodes in medical imaging detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent (1nA–100µA) to voltage with <1µV offset drift over temperature. Use Value: Enables 16-bit dynamic range capture without gain switching, reducing system latency and component count. | Use Scenario: Converting leakage currents from semiconductor test fixtures into calibrated voltage outputs. IC Role / Device Role / Timing Role: High-precision current-sensing element with 50pA input bias current and 25µV offset for sub-nA resolution. Use Value: Eliminates need for guarded triax cabling and external nulling, simplifying metrology-grade test hardware. |
| Optical Amplifiers | CAT-Scanner Front-End |
Use Scenario: Monitoring transmitted optical power in EDFA gain-control loops to maintain constant output over wavelength and temperature. IC Role / Device Role / Timing Role: Fast-response transimpedance stage feeding analog AGC circuitry with 100ns overload recovery. Use Value: Supports 10kHz+ control bandwidths, preventing gain transients that cause spectral ripple in amplified signals. | Use Scenario: Digitizing X-ray detector outputs in computed tomography systems requiring high SNR and linearity. IC Role / Device Role / Timing Role: First-stage I/V converter for scintillator-photodiode arrays operating at −40°C to +85°C ambient. Use Value: Maintains <0.01% gain error across temperature via 0.1µV/°C drift spec, ensuring consistent Hounsfield unit calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA300IDBVR | 150MHz GBW, higher 500µV VOS, 2.7V–5.5V supply | Better bandwidth but 20× higher offset; suited for lower-precision, higher-speed photodiode apps where drift tolerance >1µV/°C | Select when >10MHz transimpedance bandwidth is required and offset stability is secondary. |
| OPA335AIDBVR | 10µV VOS, zero-drift, 300kHz GBW, 2.5V–5V supply | Superior DC precision but insufficient bandwidth for >100kHz optical signals; limited to low-frequency I/V conversion | Select only for sub-10kHz applications demanding ultra-low offset, not for CAT-scan or fiber-power control. |
Compared with OPA380AIDGKRG4, OPA300IDBVR trades precision for speed (150MHz vs 90MHz), while OPA335AIDBVR sacrifices bandwidth for ultra-low offset (10µV vs 25µV); neither matches the OPA380AIDGKRG4's balanced combination of >1MHz transimpedance bandwidth, 25µV VOS, and 0.1µV/°C drift in MSOP-8.
Availability
OPA380AIDGKRG4 is available at Aetrix Electronics and suitable for photodiode monitoring, precision I/V conversion, and CAT-scan front-end designs requiring stable component supply, guaranteed traceability, and extended temperature support (−40°C to +125°C).
Supply support for OPA380AIDGKRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision amplifiers and signal-chain solutions.
The OPA380 family was designed specifically for high-speed, high-precision transimpedance applications-including medical imaging, fiber-optic power control, and analytical instrumentation-where low bias current, ultra-stable offset, and wide dynamic range are mandatory.
FAQ
What is the maximum transimpedance bandwidth achievable with OPA380AIDGKRG4?
The OPA380AIDGKRG4 achieves >1MHz transimpedance bandwidth in typical configurations using photodiode capacitances up to 100pF and feedback resistors up to 10MΩ. This is enabled by its 90MHz gain-bandwidth product and optimized internal compensation, as verified in TI's SBOS291G datasheet Figure 7 and Application Note SBOA055.
Does OPA380AIDGKRG4 support true 0V output swing on a single supply?
Yes, OPA380AIDGKRG4 supports 0V output swing when configured with an external pulldown resistor (e.g., 2kΩ) connected between VOUT and a −5V supply, as shown in Figure 3 of the SBOS291G datasheet. This extends the linear output range to 0–4.4V with excellent accuracy across −40°C to +125°C.
What is the input bias current specification for OPA380AIDGKRG4, and why does it matter?
OPA380AIDGKRG4 has a maximum input bias current of 50pA at +25°C, critical for preserving signal fidelity in high-impedance photodiode circuits. At 10MΩ feedback resistance, this contributes only 0.5mV of offset error-enabling accurate measurement of nanoamp-level photocurrents without significant dark-current corruption.
How does the auto-zero architecture of OPA380AIDGKRG4 differ from traditional chopper amplifiers?
OPA380AIDGKRG4 uses a proprietary auto-zero technique that corrects offset every 100µs without introducing switching glitches in the baseband. Unlike chopper amplifiers, it exhibits virtually no aliasing or 10kHz artifacts, with residual noise energy above 20MHz-making it suitable for wideband optical signal chains without post-filtering.
Is OPA380AIDGKRG4 pin-compatible with other members of the OPA380 family?
Yes, OPA380AIDGKRG4 (MSOP-8) shares identical pinout with all single-channel OPA380 variants in MSOP-8 and SO-8 packages, including OPA380AIDR and OPA380AID. Pin assignments are fixed per datasheet Figure 5: Pin 6 = −In, Pin 7 = +In, Pin 3 = Out, Pin 2/8 = Supplies-ensuring drop-in replacement across qualified versions.
OPA380AIDGKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Transimpedance
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 80V/µs
- Gain Bandwidth Product:
- 90 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 4 µV
- Current - Supply:
- 7.5mA
- Current - Output / Channel:
- 150 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA380AIDGKRG4 FAQ
1.How can I place an order for OPA380AIDGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA380AIDGKRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA380AIDGKRG4 reliable?
The price and inventory of OPA380AIDGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA380AIDGKRG4 is usually 5 days.
3.What payment methods are accepted for OPA380AIDGKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA380AIDGKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA380AIDGKRG4?
OPA380AIDGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA380AIDGKRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA380AIDGKRG4?
For technical support, including OPA380AIDGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA380AIDGKRG4 requirements.
6.How does Aetrix verify that OPA380AIDGKRG4 is sourced from the original manufacturer or authorized distributors?
All OPA380AIDGKRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA380AIDGKRG4 meets industry standards.
7.What is the process for return or replacement of OPA380AIDGKRG4?
All OPA380AIDGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA380AIDGKRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA380AIDGKRG4 part is unused and in its original packaging.
Return procedure for OPA380AIDGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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