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Texas Instruments OPA170AIDRLT
- Part No.:
- OPA170AIDRLT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-553
- Datasheet:
-
OPA170AIDRLT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT5
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
OPA170AIDRLT from Texas Instruments is a single-channel, 36-V rail-to-rail input/output operational amplifier in a 5-pin SOT-553 package, featuring 1.2 MHz gain bandwidth, 19 nV/√Hz input voltage noise at 1 kHz, 110 µA quiescent current per amplifier, and operation from 2.7 V to 36 V supply. It serves as a precision signal-conditioning front-end in battery-powered instrumentation and transducer interfaces.
For engineers reviewing the OPA170AIDRLT datasheet, OPA170AIDRLT pinout, OPA170AIDRLT application, or OPA170AIDRLT equivalent, key selection criteria include its rail-to-rail input (extending 100 mV beyond V– and within 2 V of V+), low bias current (≤15 pA max), high CMRR (120 dB at ±18 V), stable operation with up to 300 pF capacitive load, and –40°C to +125°C operating range.
Technical Context
The OPA170AIDRLT employs a P-channel JFET input stage enabling ultra-low input bias current and rail-to-rail common-mode input range down to 100 mV below V–. Its internal phase-reversal protection prevents output inversion when inputs exceed the linear common-mode range - a critical feature for noninverting configurations in unregulated power systems.
It delivers stable unity-gain performance with capacitive loads up to 300 pF and maintains ≥110 dB open-loop gain across –40°C to +125°C. The device's 0.4 V/µs slew rate and 20 µs 0.1% settling time (10-V step, ±18 V supply) support precision DC-coupled and moderate-bandwidth AC applications without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7 V to 36 V (±1.35 V to ±18 V): Enables direct interface with industrial 24-V rails and low-voltage battery systems without level-shifting. |
| Gain Bandwidth Product | 1.2 MHz: Supports stable closed-loop gain ≥10 up to ~120 kHz; sufficient for sensor signal conditioning and active filtering. |
| Input Voltage Noise | 19 nV/√Hz at 1 kHz: Low-noise performance suitable for strain gauge and thermocouple amplification where signal amplitudes are sub-mV. |
| Quiescent Current | 110 µA per amplifier (typ): Enables multi-year operation in coin-cell–powered portable test equipment and remote sensors. |
| Input Bias Current | ≤15 pA (max at 25°C): Minimizes voltage error across high-impedance sources like pH electrodes or photodiode feedback networks. |
| CMRR | 120 dB at ±18 V: Rejects >1 million:1 common-mode interference in bridge-based measurement circuits with mismatched legs. |
| Rail-to-Rail Output | VOUT swings within 35 mV of rails (at ±18 V, IO = ±1 mA): Maximizes dynamic range in single-supply data acquisition systems. |
Pinout & Package
SOT-553 (DRL) package: 1.6 mm × 1.2 mm × 0.6 mm body, 0.5-mm pitch, thermally enhanced bottom-side pad for improved PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN (noninverting input) | High-impedance node accepting signals from high-Z sources; referenced to V– for single-supply biasing. |
| 2 | V– (negative supply) | Lowest potential rail; must be connected directly to ground or negative supply; supports true rail-to-rail input down to V– – 0.1 V. |
| 3 | –IN (inverting input) | Feedback node in standard op-amp configurations; RFI-filtered internally to suppress RF rectification artifacts. |
| 4 | OUT (output) | Capable of sourcing/sinking ≥17 mA; drives 10-kΩ loads to within 35 mV of rails; stable with ≤300 pF capacitive load. |
| 5 | V+ (positive supply) | Highest potential rail; supplies internal bias circuitry; supports operation up to 36 V with no derating required. |
Key Features
| Feature | Design Value |
|---|---|
| RFI-filtered inputs | Integrated RC filtering suppresses RF-induced DC offset shifts from cellular, Wi-Fi, or switching regulator coupling. |
| No phase reversal | Input overdrive beyond common-mode range forces output to rail instead of inverting - eliminates latch-up risk in fault-tolerant designs. |
| Extended input range | Operates with inputs 100 mV below V– and up to V+ – 2 V; enables direct sensing of ground-referenced signals in single-supply systems. |
| Low quiescent current | 110 µA typical ensures <1 µW static power at 3.3 V - critical for always-on sensor nodes and energy-harvesting applications. |
| High ESD robustness | ±4000 V HBM and ±750 V CDM ratings reduce field failure risk during automated assembly and end-equipment handling. |
Applications
| Transducer Amplifier | Bridge Amplifier |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from load cells, pressure sensors, or RTDs in industrial weighing systems. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with low drift and high CMRR to reject bridge excitation noise and thermal EMFs. Use Value: ±2 µV/°C offset drift and 120 dB CMRR ensure <0.01% full-scale error over –40°C to +85°C ambient. |
Use Scenario: Signal conditioning for Wheatstone bridge configurations in strain gauge-based structural health monitoring. IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier front-end with rail-to-rail input enabling direct connection to bridge midpoints. Use Value: 15 pA max input bias current prevents loading errors in high-resistance bridges (>10 kΩ leg resistance). |
| Battery-Powered Instrument | Precision Integrator |
|
Use Scenario: Portable multimeter or handheld environmental sensor logging temperature, humidity, and gas concentration. IC Role / Device Role / Timing Role: Low-power analog front-end for ADC driver and reference buffer, operating from coin cell or Li-ion battery. Use Value: 110 µA quiescent current extends 10-year shelf life in sealed devices; 36-V rating supports wide-input buck-boost regulators. |
Use Scenario: Analog computing circuits and charge integration in radiation dosimeters or photometric integrators. IC Role / Device Role / Timing Role: Ultra-low-input-bias-current integrator core minimizing leakage-induced drift over integration periods >1 s. Use Value: ≤15 pA input bias current limits integration error to <1 µV/s at 1 V output - enabling 10-bit accuracy over 100-ms windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVR | Higher precision: 5 µV max VOS, 0.2 µV/°C drift, but 190 µA IQ; SO-8/SOT-23-5 only - no SOT-553 option. | Better for metrology-grade integrators; less suitable for space-constrained battery nodes due to higher IQ and larger footprint. | Select OPA192IDBVR only if offset drift dominates system error budget and board area allows SO-8. |
| TLV170IDBVR | Same SOT-23-5 package, lower cost, but reduced specs: 3.5 mV max VOS, 1.5 µV/°C drift, 1.8 MHz GBW, 150 µA IQ. | Acceptable for consumer-grade sensor interfaces where 12-bit accuracy suffices and cost is primary constraint. | Choose TLV170IDBVR for cost-sensitive volume production where ±3.5 mV offset is tolerable and layout space matches SOT-23-5. |
Compared with OPA170AIDRLT, OPA192IDBVR offers superior DC precision at higher power and no SOT-553 option, while TLV170IDBVR trades accuracy for cost and uses a physically larger SOT-23-5 footprint - making OPA170AIDRLT the optimal balance of micro-size, low IQ, and industrial-grade drift performance.
Availability
OPA170AIDRLT is available at Aetrix Electronics and suitable for battery-powered instruments, transducer amplifiers, bridge amplifier circuits, and precision integrators requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for OPA170AIDRLT 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 deep expertise in precision amplifiers, power management, and signal chain ICs.
The OPAx170 series was designed specifically for industrial and instrumentation applications demanding wide supply range, rail-to-rail operation, low power, and robust ESD/overstress tolerance - all in miniature packages.
FAQ
What is the maximum capacitive load the OPA170AIDRLT can drive stably?
The OPA170AIDRLT is specified to remain unity-gain stable with capacitive loads up to 300 pF, as confirmed in the datasheet's Typical Characteristics section (Figure 23–24). This capability eliminates the need for external isolation resistors in many sensor interface and DAC output buffer applications, preserving signal integrity without added component count or board area.
Does the OPA170AIDRLT support true rail-to-rail input operation?
Yes - the OPA170AIDRLT accepts input voltages from 100 mV below V– to within 2 V of V+, and can operate with inputs extending 100 mV beyond V+ (with reduced performance). This is explicitly documented in Section 3 (Description) and Electrical Characteristics Table (VCM parameter), enabling direct interfacing with ground-referenced sensors in single-supply systems.
What is the guaranteed input bias current specification for OPA170AIDRLT over temperature?
The OPA170AIDRLT guarantees input bias current ≤ ±3.5 nA over the full –40°C to +125°C operating range, with a tighter 15 pA maximum at 25°C. This is verified in the Electrical Characteristics table under "INPUT BIAS CURRENT" (IB), ensuring predictable error contribution in high-impedance feedback networks across industrial environments.
Can the OPA170AIDRLT replace older OPA2333 or OPA2340 in existing SOT-23-5 layouts?
No - the OPA170AIDRLT uses the SOT-553 (DRL) package (1.6 mm × 1.2 mm), which is physically smaller and has different pinout than SOT-23-5 (2.9 mm × 1.6 mm). Pin mapping differs: OPA170AIDRLT pin 1 = +IN, pin 2 = V–, pin 3 = –IN, pin 4 = OUT, pin 5 = V+; legacy SOT-23-5 op-amps use incompatible assignments. PCB redesign is required.
What thermal performance metrics apply to the OPA170AIDRLT in SOT-553 package?
Per Section 7.4 of the datasheet, the OPA170AIDRLT in DRL (SOT-553) package has RθJA = 208.1°C/W, RθJB = 42.4°C/W, and ψJB = 42.2°C/W. These values confirm effective heat transfer to the PCB, supporting reliable operation at 125°C ambient when using minimum recommended copper pour (≥100 mm²) under the thermal pad.
OPA170AIDRLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 110µA
- Current - Output / Channel:
- 17 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-5
OPA170AIDRLT FAQ
1.How can I place an order for OPA170AIDRLT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA170AIDRLT 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 OPA170AIDRLT reliable?
The price and inventory of OPA170AIDRLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA170AIDRLT is usually 5 days.
3.What payment methods are accepted for OPA170AIDRLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA170AIDRLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA170AIDRLT?
OPA170AIDRLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA170AIDRLT 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 OPA170AIDRLT?
For technical support, including OPA170AIDRLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA170AIDRLT requirements.
6.How does Aetrix verify that OPA170AIDRLT is sourced from the original manufacturer or authorized distributors?
All OPA170AIDRLT 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 OPA170AIDRLT meets industry standards.
7.What is the process for return or replacement of OPA170AIDRLT?
All OPA170AIDRLT units undergo pre-shipment inspection (PSI). If there is an issue with OPA170AIDRLT, 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 OPA170AIDRLT part is unused and in its original packaging.
Return procedure for OPA170AIDRLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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