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Texas Instruments OPA317IDR
- Part No.:
- OPA317IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA317IDR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,021
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Product details
Overview
OPA317IDR from Texas Instruments is a single-channel, rail-to-rail input/output, zero-drift operational amplifier optimized for precision low-voltage applications. It delivers 20 µV typical offset voltage, 300 kHz gain-bandwidth product, and 35 µA maximum quiescent current across 1.8 V to 5.5 V supply, enabling high-accuracy signal conditioning in battery-powered medical sensors and electronic scales.
For engineers reviewing the OPA317IDR datasheet, OPA317IDR pinout, OPA317IDR application, or OPA317IDR equivalent, key selection criteria include its 0.05 µV/°C drift performance, ±90 µV max offset over temperature, EMI-filtered input stage, and validated operation from –40°C to +125°C in SC70-5 and SOT-23-5 packages.
Technical Context
The OPA317IDR employs a proprietary auto-calibration architecture with continuous 125-kHz correction cycles every 8 µs, eliminating 1/f noise while maintaining time-continuous signal path integrity. Its CMOS input stage achieves 275 pA typical bias current and 108 dB typical CMRR, supporting DC-critical transducer interfaces without external trimming.
Internal EMI/RFI filtering-comprising 10 kΩ series resistors and integrated low-pass stages-provides –3 dB attenuation at ~8 MHz, reducing susceptibility to switching noise in mixed-signal PCB environments. The class AB output drives ≥10 kΩ loads while swinging within 30 mV of both rails under full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V - enables direct battery operation (e.g., single-cell Li-ion or two alkaline cells) without LDO regulation |
| Offset Voltage (max) | ±90 µV at TA = –40°C to +125°C - ensures ≤0.009% error in 10-bit ADC front-end with 2.5 V reference |
| Drift (dVOS/dT) | 0.05 µV/°C - contributes <0.6 µV total drift over 125°C span, critical for uncalibrated temperature measurement |
| Quiescent Current | 35 µA max per amplifier - supports >10-year battery life in always-on handheld test equipment |
| Gain Bandwidth | 300 kHz - sufficient for anti-aliasing and sensor signal conditioning up to ~50 kHz closed-loop bandwidth |
| Input Common-Mode Range | (V–) – 0.1 V to (V+) + 0.1 V - allows direct interfacing to 0 V-referenced thermistors or bridge sensors |
| Output Swing (to rail) | 30 mV from each rail at full load - preserves dynamic range in 1.8 V systems where headroom is constrained |
Pinout & Package
OPA317IDR is packaged in a 5-pin SC70 (DCK) package measuring 1.25 mm × 2.00 mm, optimized for space-constrained portable instrumentation. Thermal resistance RθJA is 298.4°C/W, requiring minimal copper area for thermal management in low-power designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Class AB rail-to-rail output capable of sourcing/sinking ≥5 mA; swings within 30 mV of V+ or V– under load |
| 2 - V– | Negative supply | Lowest potential rail; must be connected to system ground or negative supply; internal ESD clamp to V– |
| 3 - +IN | Noninverting input | High-impedance CMOS node (ZIN > 1012 Ω); accepts signals beyond rails by 0.1 V; protected by 10 kΩ EMI filter |
| 4 - –IN | Inverting input | Differential partner to +IN; matched input capacitance (2 pF diff, 4 pF common-mode) minimizes phase error |
| 5 - V+ | Positive supply | Highest potential rail; supports 1.8–5.5 V operation; internal ESD clamp to V+; PSRR > 100 dB up to 100 Hz |
Key Features
| Feature | Design Value |
|---|---|
| Zerø-Drift architecture | Auto-calibrates every 8 µs to maintain ≤±90 µV offset and 0.05 µV/°C drift - eliminates manual calibration in field-deployed sensors |
| Rail-to-rail I/O | Input extends 0.1 V beyond supplies; output swings to within 30 mV of rails - maximizes usable dynamic range in 1.8 V systems |
| Integrated EMI filtering | On-chip 10 kΩ input resistors + RC network with ~8 MHz cutoff - suppresses conducted noise from DC-DC converters without external components |
| Low quiescent current | 35 µA max per amplifier at full temperature range - enables microamp-level sleep modes in battery-powered data loggers |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in buffer, PGA, and sensor interface circuits |
Applications
| Medical Instrumentation | Electronic Scales |
|---|---|
Use Scenario: Amplifying microvolt-level signals from strain-gauge load cells in portable weighing devices. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with ultra-low offset and drift to resolve sub-gram weight changes. Use Value: ±90 µV max offset ensures <0.01% full-scale error at 10 kg range with 2.5 V reference, eliminating factory calibration. |
Use Scenario: Signal conditioning for bridge-based pressure sensors in clinical blood pressure monitors. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail buffer driving 12-bit SAR ADC inputs with minimal gain error. Use Value: 0.05 µV/°C drift prevents thermal zero-shift during 15-minute patient measurement cycles at ambient temperature variation. |
| Battery-Powered Instruments | Current Sense |
Use Scenario: High-side current sensing in handheld multimeters powered by two AA batteries (3 V). IC Role / Device Role / Timing Role: Precision difference amplifier with rail-to-rail output driving internal ADC. Use Value: 1.8 V minimum supply allows operation down to 2.4 V battery voltage, extending usable battery life by 20% vs. 3 V–only op-amps. |
Use Scenario: Bidirectional shunt-based current monitoring in portable ECG units. IC Role / Device Role / Timing Role: Zero-drift amplifier rejecting common-mode voltage up to 3.3 V while amplifying ±50 mV sense signals. Use Value: 108 dB CMRR ensures <50 nA measurement error at 1 A load, meeting IEC 60601-2-27 leakage current requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Lower offset (10 µV max), higher IQ (17 µA typ), same SC70-5 package; no internal EMI filter | Better DC accuracy but more susceptible to switching noise in DC-DC–powered systems | Select when absolute lowest offset dominates over EMI robustness and supply current is secondary |
| MCP6V81T-E/OT | Higher GBW (1 MHz), higher IQ (60 µA max), same rail-to-rail I/O; no auto-calibration - uses chopper only | Superior small-signal bandwidth but larger drift (0.25 µV/°C) and no 1/f noise cancellation | Select when AC response matters more than long-term DC stability in industrial control loops |
Compared with OPA317IDR, OPA333AIDBVR offers tighter initial offset but lacks integrated EMI filtering, while MCP6V81T-E/OT trades lower drift and noise for higher power and reduced DC precision - making OPA317IDR optimal for battery-powered, noise-prone, wide-temperature sensor nodes where balanced performance is essential.
Availability
OPA317IDR is available at Aetrix Electronics and suitable for battery-powered instruments, electronic scales, medical instrumentation, and current-sense applications requiring stable component supply across automotive, industrial, and consumer OEM programs.
Supply support for OPA317IDR 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 amplifiers, data converters, and power management ICs.
The OPA317IDR belongs to TI's Zerø-Drift precision op-amp product line, designed specifically for cost-sensitive, low-power, high-accuracy sensor signal conditioning in portable and industrial measurement systems.
FAQ
What is the maximum operating temperature range for the OPA317IDR?
The OPA317IDR is fully specified from –40°C to +125°C ambient temperature. All key parameters-including offset voltage (±90 µV max), drift (0.05 µV/°C), and quiescent current (35 µA max)-are guaranteed across this full industrial temperature range, making it suitable for under-hood automotive sensors and industrial process controllers.
Does the OPA317IDR require external capacitors for stability?
No, the OPA317IDR is unity-gain stable and does not require external compensation capacitors. Its internal compensation ensures stable operation with gains ≥1, including voltage follower configurations. This eliminates layout sensitivity and reduces bill-of-materials cost in sensor buffer and reference buffer applications.
Can the OPA317IDR drive capacitive loads directly?
The OPA317IDR can reliably drive up to 100 pF capacitive loads without oscillation, as verified in the datasheet's Typical Characteristics section. For loads exceeding 100 pF, a small isolation resistor (e.g., 10–50 Ω) between the output and capacitor is recommended to maintain phase margin and prevent peaking.
How does the internal EMI filtering in the OPA317IDR improve system robustness?
The OPA317IDR integrates 10 kΩ series resistors and on-die RC filtering on both inputs, providing ~8 MHz –3 dB cutoff and 20 dB/decade roll-off. This attenuates high-frequency noise from DC-DC converters and digital clocks before rectification occurs, preventing offset shifts that would otherwise degrade DC measurement accuracy in noisy PCB environments.
Is the OPA317IDR pin-compatible with other members of the OPAx317 family?
The OPA317IDR in SC70-5 (DCK) package shares identical pinout with OPA317 variants in SOT-23-5 (DBV) and SOIC-8 (D) packages for pins 1–5 (+IN, –IN, OUT, V–, V+). However, SOIC-8 includes two NC pins (1 and 8), so board-level compatibility requires verifying footprint and routing constraints-not just pin function mapping.
OPA317IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
OPA317IDR FAQ
1.How can I place an order for OPA317IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA317IDR 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 OPA317IDR reliable?
The price and inventory of OPA317IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA317IDR is usually 5 days.
3.What payment methods are accepted for OPA317IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA317IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA317IDR?
OPA317IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA317IDR 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 OPA317IDR?
For technical support, including OPA317IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA317IDR requirements.
6.How does Aetrix verify that OPA317IDR is sourced from the original manufacturer or authorized distributors?
All OPA317IDR 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 OPA317IDR meets industry standards.
7.What is the process for return or replacement of OPA317IDR?
All OPA317IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA317IDR, 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 OPA317IDR part is unused and in its original packaging.
Return procedure for OPA317IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA317IDR Tags
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LM358DT
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LM358DR
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