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Texas Instruments OPA2380AIDGKT
- Part No.:
- OPA2380AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2380AIDGKT.pdf
- Description:
- IC TRANSIMPEDANCE 2 CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,233
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Product details
Overview
OPA2380AIDGKT from Texas Instruments is a dual-channel precision transimpedance amplifier optimized for high-speed photodiode current-to-voltage conversion. It delivers 90MHz gain bandwidth, 25µV max offset voltage, 0.1µV/°C max drift, 50pA max bias current (inverting input), and operates from 2.7V to 5.5V supply. It enables >1MHz transimpedance bandwidth in optical front-ends such as CAT-scan detectors and fiber-optic power monitoring.
For engineers reviewing the OPA2380AIDGKT datasheet, OPA2380AIDGKT pinout, OPA2380AIDGKT application, or OPA2380AIDGKT equivalent, key selection criteria include transimpedance bandwidth stability across photodiode capacitance variations, output swing to 0V with external pulldown, dynamic range of 4–5 decades (1nA to 100µA), and long-term VOS stability under +125°C operation.
Technical Context
The OPA2380AIDGKT integrates an auto-zero core with a continuous-time 90MHz signal-path amplifier, correcting offset every 100µs without introducing significant 10kHz aliasing. Its architecture eliminates phase inversion during input overvoltage and supports stable operation with feedback capacitors up to 18pF for photodiode capacitances from 1pF to 100pF.
It features matched dual amplifiers in a single MSOP-8 package, with independent inputs and outputs, channel separation >100dB at DC, and rail-to-rail output swing capability extended to 0V using an external 2kΩ pulldown resistor to –5V - enabling true single-supply I/V conversion with full-scale accuracy down to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90MHz - enables >1MHz transimpedance bandwidth with typical photodiode capacitance (10–100pF) and feedback resistors up to 10MΩ. |
| Input Offset Voltage | 25µV max - ensures ≤0.25% error in 10mV full-scale I/V output from 1nA input (10MΩ RF), critical for precision optical sensing. |
| Offset Drift | 0.1µV/°C max - guarantees <1µV total drift over –40°C to +125°C, supporting medical and industrial systems without recalibration. |
| Bias Current (Inverting Input) | ±50pA max - minimizes dark-current-induced error in low-light photodiode applications (e.g., PET scanners). |
| Supply Range | 2.7V to 5.5V - compatible with Li-ion, USB, and industrial 3.3V/5V rails; specified over full –40°C to +125°C operating range. |
| Quiescent Current | 7.5mA per amplifier - enables dual-channel operation within 15mA total, suitable for space-constrained portable instrumentation. |
| Output Swing to Negative Rail | 0V achievable - with 2kΩ pulldown to –5V, supports unipolar ADC interfacing (e.g., 0–4.096V) without level-shifting circuitry. |
Pinout & Package
OPA2380AIDGKT is housed in an MSOP-8 package (2.0mm × 3.0mm, 0.65mm pitch), optimized for compact optical sensor modules and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply rail | Accepts 2.7V–5.5V; requires local 1µF ceramic bypass to GND for stability in high-bandwidth photodiode circuits. |
| 2 - Out B | Amplifier B output | Drives load up to 150mA short-circuit current; swing extends to 0V when RP pulldown to –5V is applied. |
| 3 - –In B | Inverting input (Channel B) | Summing junction for photodiode cathode; ultra-low 50pA bias current preserves weak photocurrent integrity. |
| 4 - +In B | Noninverting input (Channel B) | DC bias reference point; typically tied to V+/2 or filtered reverse-bias voltage for photodiode operation. |
| 5 - Out A | Amplifier A output | Independent output; identical specs to Out B - enables dual-channel synchronous detection or redundancy. |
| 6 - –In A | Inverting input (Channel A) | Matched to Pin 3; supports differential photodiode configurations or separate optical channels. |
| 7 - +In A | Noninverting input (Channel A) | Independent bias node; allows asymmetric biasing for channel-specific optimization. |
| 8 - V− | Negative supply rail / Ground | Typically connected to system GND; supports single-supply operation; pulldown resistor connects to external –5V, not this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero + high-speed composite architecture | Combines 100µs zero-correction cycle with 90MHz GBW signal path - achieves precision without sacrificing bandwidth or introducing 10kHz artifacts. |
| Transimpedance bandwidth >1MHz | Validated across photodiode capacitances from 1pF to 100pF using standard feedback compensation (CF = 0.5–18pF), per TI SBOS291G Figure 7. |
| Dynamic range: 4–5 decades | Supports linear I/V conversion from 1nA to 100µA in one stage - eliminates need for programmable-gain stages or log amps in medium-dynamic-range systems. |
| Output swing to 0V | Enabled by external 2kΩ resistor to –5V; maintains linearity and accuracy down to 0V output - simplifies interface with unipolar SAR ADCs. |
| Long-term VOS stability | ≤1µV variation after 300-hour life test at +150°C - exceeds JFET op amps and supports 10+ year field reliability in medical imaging equipment. |
Applications
| Photodiode Monitoring | Precision I/V Conversion |
|---|---|
|
Use Scenario: Real-time measurement of low-level photocurrents from silicon or InGaAs photodiodes in portable blood oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier converting 100pA–10µA photocurrents into 1mV–100mV voltage signals with <0.5% total error. Use Value: Enables 16-bit resolution on 10mV full-scale output without post-amplification, reducing component count and noise sources. |
Use Scenario: High-accuracy current sensing in laser diode driver feedback loops for telecom transceivers. IC Role / Device Role / Timing Role: Dual-channel I/V converter measuring forward and monitor photodiode currents simultaneously for closed-loop power control. Use Value: Matched channel performance (CMRR >95dB, offset drift tracking <0.05µV/°C) ensures stable bias control across temperature. |
| Optical Amplifiers | CAT-Scanner Front-End |
|
Use Scenario: Signal conditioning in analog front-end of fiber-optic receiver modules requiring wideband response to 1MHz modulation. IC Role / Device Role / Timing Role: Transimpedance stage setting system bandwidth; configured with CF = 2pF and RF = 1MΩ for flat 1MHz response. Use Value: 90MHz GBW ensures minimal phase lag and overshoot (<5%) even with 50pF photodiode capacitance and PCB strays. |
Use Scenario: Detector signal conditioning in computed tomography (CT) scanner detector arrays operating at +85°C ambient. IC Role / Device Role / Timing Role: Dual-channel amplifier processing X-ray scintillation pulses from adjacent detector elements. Use Value: Specified operation to +125°C junction temperature and 0.1µV/°C drift ensure calibration stability over multi-hour scan sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA380AIDBVR | Single-channel version in SOT-23-5; identical electrical specs but no channel matching or dual functionality. | Suitable only for single-channel designs; lacks independent dual outputs needed for differential or redundant sensing. | Select when board space is extremely constrained and only one I/V channel is required. |
| OPA2189IDGKT | Zero-drift dual op amp (1.8µV VOS max, 0.003µV/°C drift); lower bandwidth (12MHz GBW) and higher bias current (±20pA typ). | Optimized for ultra-low-drift DC applications (e.g., strain gauge bridges), not high-speed photodiode bandwidth. | Choose only if transimpedance bandwidth <200kHz suffices and sub-µV drift dominates over speed requirements. |
Compared with OPA380AIDBVR, the OPA2380AIDGKT provides dual-channel integration and matched performance in one MSOP-8 footprint; compared with OPA2189IDGKT, it trades ultra-low drift for 7.5× higher gain bandwidth - making it uniquely suited for >500kHz optical signal chains where both precision and speed are mandatory.
Availability
OPA2380AIDGKT is available at Aetrix Electronics and suitable for photodiode monitoring, CAT-scan front-ends, and optical amplifier designs requiring stable component supply, long-lifecycle support, and guaranteed traceability for medical and industrial certification.
Supply support for OPA2380AIDGKT 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 decades of expertise in precision op amps and signal-chain solutions.
The OPA2380AIDGKT belongs to TI's precision transimpedance amplifier product line, engineered specifically for high-speed, low-noise optical current measurement in medical imaging, analytical instrumentation, and fiber-optic communications.
FAQ
What is the maximum photodiode capacitance supported by OPA2380AIDGKT while maintaining >1MHz transimpedance bandwidth?
The OPA2380AIDGKT maintains >1MHz transimpedance bandwidth with photodiode capacitances up to 100pF when paired with appropriate feedback compensation (e.g., CF = 5pF for RF = 1MΩ). This is validated in TI SBOS291G Figure 7 and confirmed by the 90MHz GBW and 1.1pF differential input capacitance specification.
Does OPA2380AIDGKT support true 0V output swing on a single +5V supply?
Yes - OPA2380AIDGKT achieves 0V output swing using an external 2kΩ pulldown resistor connected between VOUT and a –5V supply, as detailed in Figure 3 and Section "Achieving Output Swing to Ground" of SBOS291G. Without this resistor, minimum output is ~100mV above V−.
How does the auto-zero architecture of OPA2380AIDGKT affect noise performance at 10kHz?
The OPA2380AIDGKT's auto-zero correction occurs at 10kHz but uses internal filtering to suppress fundamental energy at that frequency; measured input voltage noise density is 67nV/√Hz at 10kHz (SBOS291G Table 1), with residual artifacts appearing >20MHz - well above typical transimpedance signal bands.
Is OPA2380AIDGKT pin-compatible with other dual op amps in MSOP-8 packages?
No - OPA2380AIDGKT has a unique pinout optimized for transimpedance use: Pins 1/8 are supplies, Pins 2/5 are outputs, Pins 3/6 are inverting inputs, and Pins 4/7 are noninverting inputs. Standard dual op amps (e.g., LMV358) place inputs and outputs differently and lack pulldown-compatible output stage design.
What is the guaranteed quiescent current per channel for OPA2380AIDGKT at +125°C?
OPA2380AIDGKT guarantees ≤10mA quiescent current per amplifier at +125°C (SBOS291G, Electrical Characteristics table), ensuring thermal stability in high-temperature medical and industrial environments without derating or forced cooling.
OPA2380AIDGKT 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:
- Active
- Amplifier Type:
- Transimpedance
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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
OPA2380AIDGKT FAQ
1.How can I place an order for OPA2380AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2380AIDGKT 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 OPA2380AIDGKT reliable?
The price and inventory of OPA2380AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2380AIDGKT is usually 5 days.
3.What payment methods are accepted for OPA2380AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2380AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2380AIDGKT?
OPA2380AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2380AIDGKT 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 OPA2380AIDGKT?
For technical support, including OPA2380AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2380AIDGKT requirements.
6.How does Aetrix verify that OPA2380AIDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2380AIDGKT 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 OPA2380AIDGKT meets industry standards.
7.What is the process for return or replacement of OPA2380AIDGKT?
All OPA2380AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2380AIDGKT, 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 OPA2380AIDGKT part is unused and in its original packaging.
Return procedure for OPA2380AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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