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Texas Instruments OPA310IDCKR
- Part No.:
- OPA310IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA310IDCKR.pdf
- Description:
- SINGLE, 5.5-V, 3-MHZ HIGH-OUTPUT
- Quantity:
- Payment:
- Shipping:
Inventory:801
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Product details
Overview
OPA310IDCKR from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage (1.5V–5.5V), high-output-current (±150mA typical at 5.5V), fast-shutdown (0.9µs enable time) applications. It delivers 3MHz gain bandwidth, ±250µV typical input offset voltage, and operates across –40°C to +125°C - enabling use in LED drivers, 4–20mA loop transmitters, and optical module biasing circuits.
For engineers reviewing the OPA310IDCKR datasheet, OPA310IDCKR pinout, OPA310IDCKR application, or OPA310IDCKR equivalent, key selection criteria include its SC70-5 package footprint, shutdown capability absence (non-S variant), output drive into capacitive loads up to 250pF without oscillation, and fail-safe input structure with no diodes to V+.
Technical Context
The OPA310IDCKR employs a robust CMOS input stage with internal RFI/EMI filtering and no phase reversal under input overdrive. Its architecture supports unity-gain stability while driving ≥250pF loads, enabled by optimized compensation and low open-loop output impedance (1kΩ @ 10kHz).
It features fail-safe inputs - no ESD diodes to V+, allowing safe operation with inputs exceeding V+ by up to 6V - and integrated thermal shutdown plus current limiting, critical for high-current LED and laser driver implementations where fault robustness is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 5.5V - supports single-supply battery-powered systems down to 1.5V and industrial rails up to 5.5V. |
| Gain Bandwidth Product | 3MHz at 5.5V - enables stable amplification of signals up to ~300kHz in G=10 configuration with adequate phase margin. |
| Output Current Drive | ±150mA typical at 5.5V - sufficient to directly drive LEDs, laser diodes, or 4–20mA loop loads without external boost stages. |
| Input Offset Voltage | ±250µV typical - ensures <1mV error in precision reference buffers and low-side current sensing at room temperature. |
| Shutdown Enable Time | N/A - OPA310IDCKR is non-shutdown variant; no SHDN pin present per SC70-5 pinout. |
| Rail-to-Rail I/O | Yes - output swings within 10mV of rails at light load; input common-mode includes both supply rails for maximum dynamic range. |
| Capacitive Load Drive | 250pF without sustained oscillation - eliminates need for isolation resistors when buffering ADC inputs or driving long traces. |
Pinout & Package
OPA310IDCKR is packaged in a 5-pin SC70 (DCK) package measuring 2.1mm × 1.25mm, with exposed pad not present. Pin 1 = IN+, Pin 2 = V−, Pin 3 = IN−, Pin 4 = OUT, Pin 5 = V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | High-impedance CMOS node (100GΩ || 0.5pF); accepts full rail-to-rail common-mode range including V− and V+. |
| V− | Negative supply / ground reference | Serves as return path for input bias current and output current; must be low-impedance for stability in single-supply configurations. |
| IN− | Inverting input | Matches IN+ in impedance and voltage range; used for feedback in standard op-amp configurations (e.g., inverting amp, transimpedance). |
| OUT | Amplifier output | Capable of sourcing/sinking ±150mA; short-circuit current ≥110mA min at 5.5V; output impedance <1kΩ at 10kHz. |
| V+ | Positive supply | Accepts 1.5V–5.5V; supplies internal bias and output stage; no internal ESD diode to this pin from inputs (fail-safe). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply rails in low-voltage systems (e.g., 1.8V or 3.3V), maximizing signal swing and SNR in space-constrained designs. |
| Fail-safe inputs (no diodes to V+) | Permits input voltages up to 6.0V above V− - critical for sensor interfaces where overvoltage transients occur independent of supply rails. |
| 165µA typical quiescent current | Supports always-on operation in battery-powered instrumentation while maintaining 3MHz bandwidth and ±150mA drive capability. |
| Internal RFI/EMI filtered inputs | Reduces susceptibility to 1.8GHz cellular interference without external RC filters - verified by 75dB EMI rejection ratio measurement. |
| Drives 250pF capacitive load | Eliminates need for series output resistors in DAC buffer or ADC driver applications, preserving settling time and THD+N performance. |
Applications
| Optical Module Biasing | 4–20mA Loop Driver |
|---|---|
Use Scenario: Precision bias control of laser diodes or EMLs in SFP/SFP+ transceivers requiring stable current under temperature variation. IC Role / Device Role / Timing Role: Current-sense amplifier and voltage-controlled current source driver operating in closed-loop configuration with DAC feedback. Use Value: ±250µV offset and 3MHz GBW enable <0.1% current accuracy over –40°C to +125°C; ±150mA drive directly sources laser bias without external MOSFET. |
Use Scenario: Industrial process control transmitter converting sensor voltage to standardized 4–20mA analog output over 2-wire loop. IC Role / Device Role / Timing Role: Reference buffer and programmable current source amplifier with rail-to-rail output swing into loop impedance. Use Value: Rail-to-rail output ensures full 16mA span utilization; low IQ (165µA) minimizes loop power budget impact; fail-safe inputs tolerate sensor fault conditions. |
| Low-Side Current Sensing | LED Driver for High-Brightness Lighting |
Use Scenario: Accurate shunt-based current monitoring in motor drives or power supplies where sense node is referenced to system ground. IC Role / Device Role / Timing Role: High-gain, low-offset transimpedance amplifier with input common-mode extending to V− (ground). Use Value: Input offset drift of ±0.5µV/°C and rail-to-rail input allow sub-millivolt sensing resolution; 16nV/√Hz noise floor preserves SNR in µV-level shunt measurements. |
Use Scenario: Constant-current driver for automotive or architectural LED strings requiring high efficiency and thermal resilience. IC Role / Device Role / Timing Role: Voltage-controlled current regulator with direct LED anode connection and high-current output stage. Use Value: ±150mA continuous output and thermal shutdown protection enable reliable operation at ambient up to +125°C; SC70-5 footprint saves PCB area in dense lighting modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA320AIDBVR | Lower input offset (±15µV), lower noise (7nV/√Hz), but only ±25mA output drive and no fail-safe inputs. | Better for precision sensor signal conditioning; unsuitable for LED/laser drive or high-current loops. | Select OPA320AIDBVR only when ultra-low offset/noise dominates over output current and fault tolerance. |
| TLV9061IDCKR | Higher output current (±50mA), same SC70-5 package, but wider supply (1.8V–5.5V), no fail-safe inputs, and lower GBW (10MHz). | More suitable for general-purpose low-power amplification; lacks robustness for overvoltage-prone industrial sensors or laser biasing. | Choose TLV9061IDCKR for cost-sensitive, non-fault-critical signal chain stages where 10MHz speed suffices. |
Compared with OPA320AIDBVR and TLV9061IDCKR, the OPA310IDCKR uniquely combines high output current, fail-safe inputs, and rail-to-rail operation in a 5-pin SC70 - making it irreplaceable in LED/laser driver and ruggedized 4–20mA transmitter designs where both drive strength and input fault tolerance are mandatory.
Availability
OPA310IDCKR is available at Aetrix Electronics and suitable for optical transceiver design, industrial 4–20mA loop systems, and high-brightness LED lighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA310IDCKR 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 delivering analog and embedded processing solutions with emphasis on reliability, precision, and power efficiency across industrial, automotive, and communications markets.
The OPA310IDCKR belongs to TI's precision, high-output-current op-amp product line designed specifically for demanding analog front-ends in optical modules, programmable current sources, and rugged industrial signal conditioning.
FAQ
What is the maximum capacitive load the OPA310IDCKR can drive without oscillation?
The OPA310IDCKR drives up to 250pF of capacitive load without sustained oscillations under unity-gain conditions with a 10kΩ load to mid-supply. This capability is verified in the datasheet and eliminates the need for output isolation resistors in many ADC buffer and DAC driver applications. The OPA310IDCKR achieves this via internal compensation optimized for stability with heavy capacitive loading.
Does the OPA310IDCKR have a shutdown pin?
No, the OPA310IDCKR does not include a shutdown function. It is the standard (non-S) variant of the OPA310 family. Shutdown capability is only available in the OPA310S part numbers (e.g., OPA310SIDCKR), which feature a dedicated SHDN pin and 6-pin SC70 packaging. The OPA310IDCKR has five pins and operates continuously when powered.
What is the input common-mode voltage range of the OPA310IDCKR?
The OPA310IDCKR supports rail-to-rail input common-mode voltage: from V− to V+ + 0.1V at 5.5V supply, and from V− to V+ at 1.8V supply, across –40°C to +125°C. Its fail-safe input structure contains no diodes to V+, allowing inputs to safely exceed V+ by up to 6.0V relative to V− - a key differentiator for fault-tolerant sensor interfaces.
Can the OPA310IDCKR operate from a 1.5V single supply?
Yes, the OPA310IDCKR is fully specified to operate from 1.5V to 5.5V total supply voltage (V+ − V−). At 1.5V, it maintains rail-to-rail input/output swing, 165µA quiescent current, and usable gain bandwidth (~2.5MHz), making it suitable for ultra-low-voltage battery-powered instrumentation where supply headroom is minimal.
What is the short-circuit current rating of the OPA310IDCKR?
The OPA310IDCKR provides a minimum short-circuit current of ±110mA at 5.5V supply, as specified in the datasheet. This reflects guaranteed sourcing and sinking capability under fault conditions and supports robust operation in LED and laser driver applications. Internal current limiting and thermal shutdown protect the device during sustained overload events.
OPA310IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 165µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 1.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA310IDCKR FAQ
1.How can I place an order for OPA310IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA310IDCKR 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 OPA310IDCKR reliable?
The price and inventory of OPA310IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA310IDCKR is usually 5 days.
3.What payment methods are accepted for OPA310IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA310IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA310IDCKR?
OPA310IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA310IDCKR 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 OPA310IDCKR?
For technical support, including OPA310IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA310IDCKR requirements.
6.How does Aetrix verify that OPA310IDCKR is sourced from the original manufacturer or authorized distributors?
All OPA310IDCKR 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 OPA310IDCKR meets industry standards.
7.What is the process for return or replacement of OPA310IDCKR?
All OPA310IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA310IDCKR, 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 OPA310IDCKR part is unused and in its original packaging.
Return procedure for OPA310IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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