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Texas Instruments OPA2380AIDGKTG4
- Part No.:
- OPA2380AIDGKTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2380AIDGKTG4.pdf
- Description:
- IC TRANSIMPEDANCE 2 CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
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Product details
Overview
OPA2380AIDGKTG4 from Texas Instruments is a dual high-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 in an MSOP-8 package. It enables >1MHz transimpedance bandwidth in optical front-ends such as CAT-scan detectors and fiber-optic power monitoring.
For engineers reviewing the OPA2380AIDGKTG4 datasheet, OPA2380AIDGKTG4 pinout, OPA2380AIDGKTG4 application, or OPA2380AIDGKTG4 equivalent, key selection criteria include transimpedance stability with photodiode capacitance up to 100pF, output swing extension to 0V using a −5V pulldown resistor, and dual-channel channel separation ≥95dB at DC.
Technical Context
The OPA2380AIDGKTG4 integrates an auto-zero core operating at 10kHz correction rate with a continuous 90MHz signal-path amplifier, eliminating 1/f noise while maintaining sub-µV long-term VOS stability. Its input stage uses precision JFET inputs with 10¹³Ω || 3pF common-mode impedance and 1.1pF differential capacitance.
It supports single-supply operation from 2.7V to 5.5V and achieves 2µs 0.01% settling time with 4V step at G = +1. Output swing extends to within 600mV of V+ and 120mV of V− (RL = 2kΩ), or to 0V when RP = 2kΩ pulls VOUT to −5V - enabling true-ground-referenced I/V output for ADC interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90MHz - enables >1MHz transimpedance bandwidth with typical photodiode capacitance (≤100pF) and feedback resistors up to 10MΩ. |
| Input Offset Voltage | 25µV max - ensures ≤0.1% error in 25mV full-scale I/V output from 2.5nA photocurrent (RF = 10MΩ). |
| Input Bias Current | ±50pA max (inverting input) - minimizes dark-current-induced offset in low-light photodiode sensing. |
| Offset Drift | 0.1µV/°C max - guarantees <1µV total VOS shift over −40°C to +125°C industrial temperature range. |
| Supply Range | 2.7V to 5.5V - supports direct interface with 3.3V and 5V logic/system rails without level-shifting. |
| Quiescent Current | 7.5mA per amplifier - enables dual-channel precision amplification within 15mA total budget for portable optical sensors. |
| Channel Separation | ≥95dB dc - prevents crosstalk between independent photodiode channels in dual-detector systems. |
Pinout & Package
OPA2380AIDGKTG4 is housed in a thermally enhanced MSOP-8 package (2.0mm × 3.0mm, 0.65mm pitch) with exposed thermal pad (DGK suffix), rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply rail | Accepts 2.7V–5.5V; requires local 1µF ceramic bypass to ground for stability. |
| 2 - Out B | Amplifier B output | Drives load up to 150mA short-circuit; swing extends to 0V with external −5V pulldown resistor. |
| 3 - −In B | Inverting input (Amp B) | Summing junction for photodiode cathode; low 1.1pF capacitance critical for transimpedance stability. |
| 4 - +In B | Noninverting input (Amp B) | DC bias node; typically tied to reference voltage (e.g., V+/2) to set output common-mode level. |
| 5 - Out A | Amplifier A output | Independent output; identical specs to Out B; supports dual-channel synchronous detection. |
| 6 - −In A | Inverting input (Amp A) | Second photodiode summing node; 10¹³Ω input resistance preserves weak current integrity. |
| 7 - +In A | Noninverting input (Amp A) | Separate bias point; allows independent offset tuning per channel. |
| 8 - V− | Negative supply rail | Ground reference for single-supply operation; supports optional −5V connection for extended negative swing. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero architecture | 10kHz zero-correction cycle eliminates 1/f noise and ensures <1µV long-term VOS drift over 300-hour life test. |
| Transimpedance bandwidth optimization | 90MHz GBW + 1.1pF input capacitance enables stable >1MHz bandwidth with CDIODE ≤100pF and RF ≤10MΩ. |
| 0V-output capability | Output stage supports pull-down to −5V via RP = 2kΩ, achieving linear 0V–4.4V output swing for 12-bit ADC interfacing. |
| Photodiode reverse-bias support | +In pins accept stable DC bias (e.g., 0.5V) to reverse-bias photodiodes, reducing junction capacitance and improving response speed. |
| High CMRR & PSRR | ≥95dB CMRR and ≥100dB PSRR minimize errors from supply ripple and common-mode interference in noisy environments. |
Applications
| Photodiode-Based Optical Power Monitoring | CAT-Scanner Detector Front-End |
|---|---|
Use Scenario: Real-time measurement of laser diode output power in fiber-optic transceivers using a surface-mount photodiode. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier converting two independent photodiode currents into precise voltage outputs synchronized to system clock. Use Value: 25µV VOS and 0.1µV/°C drift ensure <0.01% full-scale error stability across temperature, enabling closed-loop power control without recalibration. | Use Scenario: Simultaneous acquisition of X-ray absorption signals from paired scintillator-photodiode detector arrays. IC Role / Device Role / Timing Role: Dual TIA providing matched gain and phase response for differential signal extraction in medical imaging ASIC front-end. Use Value: ≥95dB channel separation prevents crosstalk between adjacent detector elements, preserving spatial resolution in reconstructed CT images. |
| Precision I/V Conversion for Spectrophotometry | Fiber-Optic Receiver Signal Conditioning |
Use Scenario: Converting weak photocurrents (1nA–100µA) from monochromator exit slits into linear voltage outputs for UV-Vis absorbance analysis. IC Role / Device Role / Timing Role: High-dynamic-range transimpedance stage delivering 4–5 decade linearity without logarithmic compression. Use Value: 4–5 decade dynamic range allows single-stage measurement from trace analyte concentrations to saturated samples - eliminating need for gain-switching circuitry. | Use Scenario: Amplifying low-level photocurrents from PIN photodiodes in GPON/EPON optical line terminals. IC Role / Device Role / Timing Role: First-stage TIA setting receiver sensitivity and bandwidth; drives subsequent limiting amplifier or ADC. Use Value: 100ns overload recovery ensures rapid return from burst-mode optical transients, maintaining data integrity in TDMA upstream channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2381AIDGKT | Lower quiescent current (1.3mA vs 7.5mA), reduced GBW (17MHz), higher VOS (125µV max) | Better suited for battery-powered, low-bandwidth photodiode sensors where power dominates performance | Select OPA2381AIDGKT only when transimpedance bandwidth <200kHz is acceptable and supply current must be <2mA per channel. |
| ADA4817-2ARMZ | Higher GBW (1GHz), FET input, but no auto-zero → 1/f noise present; VOS = 200µV max, drift = 1.5µV/°C | Preferred for ultra-high-speed (>10MHz) optical pulse detection where offset stability is secondary to slew rate | Choose ADA4817-2ARMZ only when >500MHz small-signal bandwidth is required and long-term VOS drift can be managed via calibration. |
Compared with OPA2381AIDGKT, the OPA2380AIDGKTG4 delivers 4.2× higher transimpedance bandwidth and 5× lower offset drift - critical for uncalibrated medical or analytical instruments. Against ADA4817-2ARMZ, it trades raw speed for guaranteed µV-level stability over temperature and time, simplifying system-level calibration.
Availability
OPA2380AIDGKTG4 is available at Aetrix Electronics and suitable for photodiode monitoring, precision I/V conversion, and CAT-scanner front-end designs requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for OPA2380AIDGKTG4 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 OPA2380AIDGKTG4 belongs to TI's precision transimpedance amplifier product line, engineered specifically for high-stability, wide-dynamic-range optical current sensing in medical imaging, analytical instrumentation, and fiber-optic communications.
FAQ
What is the maximum photodiode capacitance supported by OPA2380AIDGKTG4 for stable 1MHz transimpedance bandwidth?
The OPA2380AIDGKTG4 supports stable >1MHz transimpedance bandwidth with photodiode capacitance up to 100pF when used with appropriate feedback compensation (e.g., CF = 0.5pF for RF = 10MΩ). This is enabled by its 90MHz gain bandwidth and low 1.1pF differential input capacitance, as verified in Figure 7 of SBOS291G.
Can OPA2380AIDGKTG4 achieve true 0V output swing on a single +5V supply?
Yes - OPA2380AIDGKTG4 achieves linear 0V output swing on a +5V supply when a 2kΩ pulldown resistor connects VOUT to −5V, as shown in Figure 3 of SBOS291G. Without this resistor, minimum output is ~100mV above V−; with it, output reaches 0V with excellent linearity and accuracy across −40°C to +125°C.
How does the auto-zero architecture of OPA2380AIDGKTG4 affect its noise performance at 10kHz?
At 10kHz, the OPA2380AIDGKTG4 exhibits 67nV/√Hz input voltage noise density (typical), unaffected by 1/f noise due to its auto-zero topology. The 10kHz correction frequency introduces negligible energy at that exact frequency thanks to internal filtering - measured noise remains flat from 1kHz to >1MHz, as confirmed in Figure 5 of SBOS291G.
What is the recommended PCB layout practice to maximize OPA2380AIDGKTG4 transimpedance stability?
Minimize stray capacitance at the inverting input (pins 3 and 6) using guard rings driven at +In potential (per Figure 11), short direct traces to photodiode cathodes, and avoid vias near summing nodes. Clean flux residue thoroughly - board leakage degrades effective input resistance below 10¹²Ω, directly impacting low-current accuracy.
Does OPA2380AIDGKTG4 require external compensation capacitors for all feedback resistor values?
No - OPA2380AIDGKTG4 is internally compensated for unity-gain stability but requires external CF across RF to control transimpedance bandwidth and prevent peaking. For RF ≤ 100kΩ, CF may be omitted; for RF ≥ 1MΩ, CF = 0.5–5pF is typical (e.g., 1.5pF for RF = 1MΩ with CDIODE = 50pF), as derived from the Butterworth design equations in Section 11 of SBOS291G.
OPA2380AIDGKTG4 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:
- 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
OPA2380AIDGKTG4 FAQ
1.How can I place an order for OPA2380AIDGKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2380AIDGKTG4 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 OPA2380AIDGKTG4 reliable?
The price and inventory of OPA2380AIDGKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2380AIDGKTG4 is usually 5 days.
3.What payment methods are accepted for OPA2380AIDGKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2380AIDGKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2380AIDGKTG4?
OPA2380AIDGKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2380AIDGKTG4 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 OPA2380AIDGKTG4?
For technical support, including OPA2380AIDGKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2380AIDGKTG4 requirements.
6.How does Aetrix verify that OPA2380AIDGKTG4 is sourced from the original manufacturer or authorized distributors?
All OPA2380AIDGKTG4 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 OPA2380AIDGKTG4 meets industry standards.
7.What is the process for return or replacement of OPA2380AIDGKTG4?
All OPA2380AIDGKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2380AIDGKTG4, 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 OPA2380AIDGKTG4 part is unused and in its original packaging.
Return procedure for OPA2380AIDGKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2380AIDGKTG4 Tags
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