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Texas Instruments OPA317IDCKR
- Part No.:
- OPA317IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA317IDCKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1CIRC SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:11,157
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Product details
Overview
OPA317IDCKR from Texas Instruments is a single-channel, zero-drift, rail-to-rail input/output operational amplifier optimized for precision low-voltage operation (1.8 V to 5.5 V). It delivers 20 µV typical offset voltage, 300 kHz gain-bandwidth, 35 µA maximum quiescent current, and 108 dB typical CMRR - enabling high-accuracy signal conditioning in battery-powered sensor front-ends and medical instrumentation.
For engineers reviewing the OPA317IDCKR datasheet, OPA317IDCKR pinout, OPA317IDCKR application, or OPA317IDCKR equivalent, key selection criteria include its SC70-5 package footprint, sub-100 µV max offset over –40°C to +125°C, rail-to-rail I/O swing within 100 mV of rails, and integrated EMI filtering for noise-sensitive measurement systems.
Technical Context
The OPA317IDCKR employs a proprietary auto-calibration architecture that corrects input offset every 8 µs using a time-continuous 125-kHz core amplifier, eliminating 1/f noise while maintaining unity-gain stability. Its input stage features EMI/RFI filtering with ~8 MHz cutoff and supports common-mode voltages extending 100 mV beyond supply rails.
This device operates as a CMOS-input op amp with 275 pA typical input bias current, 55 nV/√Hz input voltage noise at 1 kHz, and open-loop gain of 110 dB - all specified across full industrial temperature range (–40°C to +125°C) and supply range (1.8 V to 5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V - enables direct battery operation without regulation, e.g., from single Li-ion or two alkaline cells. |
| Offset Voltage (max) | ±90 µV - ensures ≤0.009% error in 1-V full-scale 12-bit ADC interfaces at room temperature. |
| Quiescent Current | 35 µA max - supports >1-year battery life in always-on sensor nodes powered by CR2032 coin cells. |
| Gain Bandwidth | 300 kHz - sufficient for DC–100 Hz sensor signals (e.g., thermocouples, strain gauges) with ≥60 dB closed-loop gain. |
| CMRR | 108 dB typical - rejects >99.999% of common-mode interference in unshielded PCB layouts near digital switching noise. |
| Input Voltage Range | (V−) − 0.1 V to (V+) + 0.1 V - allows true rail-to-rail input acquisition without external level-shifting circuitry. |
| Output Swing | Within 100 mV of rails - preserves >90% dynamic range when driving SAR ADCs with 2.5 V reference on 3.3 V supply. |
Pinout & Package
OPA317IDCKR is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm body), optimized for space-constrained portable designs. Thermal resistance RθJA is 298.4°C/W, requiring minimal copper area for thermal management in low-power applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting input | High-impedance CMOS node (ZIN > 1012 Ω); accepts signals up to 100 mV beyond V− or V+ rails. |
| −IN (Pin 3) | Inverting input | Differential input pair node; matched to +IN for <1 µV input offset contribution from layout asymmetry. |
| OUT (Pin 4) | Amplifier output | Class AB stage capable of sourcing/sinking ±5 mA; swings to within 100 mV of V− or V+ under 10-kΩ load. |
| V+ (Pin 5) | Positive supply | Highest potential rail; must not exceed 7 V absolute maximum to prevent permanent damage. |
| V− (Pin 2) | Negative supply | Lowest potential rail; supports single-supply (e.g., V− = GND) or dual-supply (e.g., V− = −0.9 V) configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Zerø-Drift architecture | Auto-calibrates offset every 8 µs, achieving <0.05 µV/°C drift and eliminating manual calibration in field-deployed instruments. |
| Rail-to-rail I/O | Enables full utilization of ADC reference voltage without external biasing resistors or level-shifters in single-supply systems. |
| Internal EMI/RFI filtering | 8-MHz low-pass filter on inputs suppresses rectified noise from GSM, Wi-Fi, or switching regulators without external RC networks. |
| Low 1/f noise | Near-flat noise spectral density down to 0.1 Hz (0.3 µVPP in 0.01–1 Hz band) improves resolution in slow-sampling precision weigh scales. |
| Wide temperature range | Specified from –40°C to +125°C - suitable for automotive cabin sensors, industrial motor controllers, and outdoor environmental monitors. |
Applications
| Electronic Scales | Medical Instrumentation |
|---|---|
Use Scenario: High-resolution weight measurement in portable clinical scales using micro-strain gauge bridges. IC Role / Device Role / Timing Role: Precision front-end amplifier conditioning bridge output before 24-bit delta-sigma ADC conversion. Use Value: ±90 µV max offset ensures <10 mg repeatability error on 10 kg full-scale platform with 0.1 mV/V bridge sensitivity. | Use Scenario: Low-noise amplification of ECG electrode signals in handheld patient monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier driver with rail-to-rail input to capture sub-mV biopotentials referenced to system ground. Use Value: 55 nV/√Hz input voltage noise and 108 dB CMRR reject 50/60 Hz mains interference without notch filters. |
| Battery-Powered Instruments | Temperature Measurements |
Use Scenario: Continuous logging of ambient temperature and humidity in wireless IoT sensor nodes. IC Role / Device Role / Timing Role: Signal conditioner for thermistor or RTD sensing elements interfaced to ultra-low-power MCU ADC. Use Value: 35 µA quiescent current extends CR2032 battery life to >2 years in 1-sample-per-minute duty cycle. | Use Scenario: Precision cold-junction compensation in industrial thermocouple measurement modules. IC Role / Device Role / Timing Role: Low-drift buffer for platinum RTD (PT100) Wheatstone bridge outputs in 4–20 mA transmitters. Use Value: <0.05 µV/°C offset drift minimizes temperature error to <0.02°C over –25°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDCKR | Lower max offset (10 µV), higher IQ (17 µA typ), same SC70-5 package and 1.8–5.5 V supply. | Better DC accuracy but less robust EMI filtering; no internal 8-MHz input filter. | Choose OPA333AIDCKR when offset-critical DC gain stages dominate; retain OPA317IDCKR where RF noise immunity is essential. |
| MCP6V81T-E/OT | Higher GBW (1 MHz), higher IQ (60 µA max), same rail-to-rail I/O and zero-drift architecture. | Supports faster settling in multiplexed sensor arrays; less suitable for multi-year battery life targets. | Select MCP6V81T-E/OT for applications needing >200 kHz closed-loop bandwidth; prefer OPA317IDCKR for sub-35 µA power budgets. |
Compared with OPA333AIDCKR and MCP6V81T-E/OT, the OPA317IDCKR uniquely balances ultra-low power (35 µA max), integrated EMI rejection, and industrial temperature rating - making it optimal for cost-sensitive, noise-prone, long-life portable instrumentation where DC precision and reliability coexist.
Availability
OPA317IDCKR is available at Aetrix Electronics and suitable for electronic scales, medical instrumentation, battery-powered instruments, and temperature measurements requiring stable component supply across extended production lifecycles.
Supply support for OPA317IDCKR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog signal chain solutions.
The OPA317IDCKR belongs to TI's Zerø-Drift operational amplifier product line, designed specifically for high-accuracy, low-power, single-supply measurement systems in portable and industrial environments.
FAQ
What is the maximum supply voltage rating for the OPA317IDCKR?
The OPA317IDCKR has an absolute maximum supply voltage (VS = V+ − V−) of 7 V. Exceeding this rating - even momentarily - may cause permanent damage. Recommended operating range is strictly 1.8 V to 5.5 V per the datasheet. This limit is enforced by internal ESD protection structures and must be respected in both single- and dual-supply configurations. Always verify voltage margins during power-up sequencing and transient events.
Does the OPA317IDCKR support true rail-to-rail output swing?
Yes, the OPA317IDCKR delivers rail-to-rail output swing within 100 mV of both supply rails under standard test conditions (VS = 5 V, RL = 10 kΩ, TA = 25°C). At light loads, it achieves <30 mV from rails. This capability enables direct interfacing with 12- to 16-bit SAR or delta-sigma ADCs without level-shifting circuitry, preserving full dynamic range in low-voltage systems like 3.3 V or 2.5 V microcontroller platforms.
How does the auto-calibration architecture of the OPA317IDCKR affect system-level noise performance?
The OPA317IDCKR uses a continuous-time auto-calibration technique that eliminates 1/f (flicker) noise, resulting in flat voltage noise density of 55 nV/√Hz from 0.1 Hz upward. Its 0.3 µVPP noise in the 0.01–1 Hz band enables high-resolution DC measurements in applications such as precision weighing and thermocouple amplification. Unlike chopper-stabilized amplifiers, it introduces no switching artifacts or aliasing, simplifying anti-alias filter design.
Can the OPA317IDCKR drive capacitive loads without instability?
The OPA317IDCKR is unity-gain stable and can safely drive up to 100 pF capacitive loads without external compensation. For loads exceeding 100 pF (e.g., long PCB traces or ADC input capacitance), a small series resistor (10–50 Ω) between amplifier output and load is recommended to maintain phase margin. The device's internal compensation ensures stable operation across full temperature and supply ranges without requiring user-adjustable feedback components.
What is the input bias current specification for the OPA317IDCKR across temperature?
The OPA317IDCKR specifies input bias current of ±300 pA maximum over the full operating temperature range (–40°C to +125°C). At 25°C, typical value is ±275 pA. This ultra-low bias current minimizes voltage errors in high-impedance sensor interfaces (e.g., pH electrodes, photodiode transimpedance stages) and ensures stable DC operating points in precision integrators and filter circuits without requiring guard rings or leakage mitigation.
OPA317IDCKR 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:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.15V/µs
- Gain Bandwidth Product:
- 300 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 275 pA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 21µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA317IDCKR FAQ
1.How can I place an order for OPA317IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA317IDCKR 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 OPA317IDCKR reliable?
The price and inventory of OPA317IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA317IDCKR is usually 5 days.
3.What payment methods are accepted for OPA317IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA317IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA317IDCKR?
OPA317IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA317IDCKR 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 OPA317IDCKR?
For technical support, including OPA317IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA317IDCKR requirements.
6.How does Aetrix verify that OPA317IDCKR is sourced from the original manufacturer or authorized distributors?
All OPA317IDCKR 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 OPA317IDCKR meets industry standards.
7.What is the process for return or replacement of OPA317IDCKR?
All OPA317IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA317IDCKR, 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 OPA317IDCKR part is unused and in its original packaging.
Return procedure for OPA317IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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