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Texas Instruments TL031IP
- Part No.:
- TL031IP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL031IP.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:949
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Product details
Overview
TL031IP from Texas Instruments is a single-channel FET-input operational amplifier optimized for low-power, low-offset precision applications. It delivers 1.1 MHz unity-gain bandwidth, ±15 V supply operation, 2.9 V/μs slew rate (positive), and 1.5 mV max input offset voltage (TL031I grade) - enabling high-impedance sensor interfacing in solar inverter feedback loops and motor drive current sensing.
For engineers reviewing the TL031IP datasheet, TL031IP pinout, TL031IP application, or TL031IP equivalent, this page provides verified specifications, validated SOIC-8 pin functions, real-world use cases in power electronics, and two confirmed alternative op-amps with documented parameter trade-offs for industrial temperature-range designs.
Technical Context
The TL031IP uses Texas Instruments' enhanced LinCMOS™ FET process to achieve >10¹² Ω input resistance and 4 pF input capacitance while maintaining micropower operation (250 μA max ICC per amplifier at ±15 V). Its rail-to-rail output swing is limited by common-mode input range constraints (−11.5 V to +14 V at ±15 V supplies).
Designed for dual-supply operation, the TL031IP requires external DC biasing and virtual-ground referencing when used in single-supply configurations. Its phase margin of 60° ensures stable unity-gain operation without added compensation, and its 120 dB CMRR supports precision differential signal conditioning in noisy power-stage environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±5 V to ±15 V - supports standard industrial dual-rail systems without level-shifting circuitry |
| Input Offset Voltage (max) | 1.5 mV at 25°C (TL031I grade) - enables sub-1% error in 100 mV reference-based current sensing |
| Unity-Gain Bandwidth | 1.1 MHz - sufficient for closed-loop control up to ~100 kHz with adequate phase margin |
| Slew Rate (SR+) | 2.9 V/μs - allows clean amplification of 100 kHz sine waves with ≤1 Vpp amplitude |
| Input Bias Current | 200 pA max at 25°C - preserves signal integrity when driving from >10 MΩ source impedances |
| Common-Mode Range | −11.5 V to +14 V at ±15 V - accommodates mid-rail biasing in high-side current monitor topologies |
| Supply Current | 250 μA max per amplifier - enables battery-backed monitoring circuits with multi-year runtime |
Pinout & Package
TL031IP is supplied in an 8-pin SOIC (D) package measuring 4.9 mm × 6 mm, with industry-standard pin spacing and thermal resistance (θJA = 86 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connection - must remain unconnected; not internally bonded |
| 2 | IN– | Inverting input - accepts feedback network for stable closed-loop gain configuration |
| 3 | IN+ | Non-inverting input - connects to high-impedance sensor or reference node |
| 4 | VCC– | Negative supply rail - establishes lower reference for dual-supply operation |
| 5 | NC | No connection - floating terminal; no internal function |
| 6 | OUT | Amplified output - drives loads ≥10 kΩ directly; requires external buffering below 2 kΩ |
| 7 | VCC+ | Positive supply rail - powers internal FET input stage and output buffer |
| 8 | NC | No connection - unused pad; no internal bond wire or circuit tie |
Key Features
| Feature | Design Value |
|---|---|
| On-chip offset-voltage trimming | Reduces initial VIO to ≤1.5 mV (TL031I), eliminating manual nulling in production test |
| FET-input architecture | 10¹² Ω input resistance enables direct interface with piezoelectric sensors and photodiode transimpedance nodes |
| Low power consumption | 250 μA max supply current allows integration into always-on fault-monitoring subsystems |
| Enhanced AC performance | 2.9 V/μs slew rate and 1.1 MHz bandwidth improve transient response over legacy TL061 without increasing ICC |
| Industrial temperature range | Specified from −40°C to +85°C - qualified for motor drive control boards and outdoor solar inverters |
Applications
| Solar Inverter String Monitoring | AC Motor Drive Current Sensing |
|---|---|
Use Scenario: Measuring DC-link current in string-level MPPT controllers using shunt resistors. IC Role / Device Role / Timing Role: Precision current-sense amplifier with high common-mode rejection in bidirectional measurement path. Use Value: 1.5 mV VIO and 120 dB CMRR enable ±0.5% full-scale accuracy across −40°C to +85°C ambient. |
Use Scenario: Amplifying low-level signals from isolated current transformers in servo drive gate-driver feedback loops. IC Role / Device Role / Timing Role: High-Z buffer and gain stage preceding ADC sampling at 100 kSPS. Use Value: 2.9 V/μs slew rate supports faithful reproduction of 50 kHz PWM edge harmonics without distortion. |
| Single-Phase Online UPS Feedback | Industrial Sensor Signal Conditioning |
Use Scenario: Regulating output voltage via error amplifier in double-conversion UPS topology. IC Role / Device Role / Timing Role: Error amplifier in voltage-control loop with 1.1 MHz GBW ensuring loop stability at 10 kHz crossover. Use Value: 60° phase margin and unity-gain stability eliminate need for external compensation components. |
Use Scenario: Conditioning millivolt-level outputs from RTD or thermocouple interfaces in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift, high-input-impedance front-end amplifier before programmable-gain stage. Use Value: 6.5 μV/°C tempco and 0.04 μV/month long-term drift ensure calibration validity over 12-month maintenance cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL071IP | Higher slew rate (13 V/μs), higher noise (18 nV/√Hz), same 8-pin SOIC package | Better suited for audio or wideband signal paths; less optimal for ultra-low-power sensor nodes | Select TL071IP when bandwidth >3 MHz and supply current <1 mA is acceptable |
| OPA344UA | Rail-to-rail input/output, 1.25 V to 5.5 V single-supply only, 1.2 MHz GBW, 250 μA ICC | Enables true single-supply operation without virtual ground; lacks dual-supply flexibility | Choose OPA344UA for battery-powered portable instrumentation requiring 3.3 V operation |
Compared with TL031IP, TL071IP trades lower power for higher speed and noise, while OPA344UA sacrifices dual-supply versatility for rail-to-rail functionality in low-voltage systems - making TL031IP the optimal choice for industrial dual-rail precision amplification where micropower and low drift are critical.
Availability
TL031IP is available at Aetrix Electronics and suitable for solar inverter string monitoring, AC motor drive current sensing, and single-phase online UPS feedback requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TL031IP 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-amp design and manufacturing.
The TL03x family was engineered to upgrade TL06x-based designs with improved DC accuracy and AC performance while retaining micropower operation - targeting industrial power conversion, motor control, and energy infrastructure applications.
FAQ
What is the maximum operating temperature range for TL031IP?
The TL031IP is characterized for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This rating is explicitly defined in Section 5.6 of the official TI datasheet (SLOS180D) under "TL031I and TL031AI Electrical Characteristics", confirming full specification compliance across this range - including input offset voltage, common-mode range, and supply current limits.
Does TL031IP support single-supply operation?
TL031IP is designed for dual-supply operation and does not support true single-supply use without external biasing. When operated from a single supply, the input common-mode range and output swing require a virtual-ground reference (e.g., TI TLE2426), and DC input biasing must be applied - as detailed in the "Description" section of the TL031 datasheet. Direct 0–5 V or 0–3.3 V connection violates recommended operating conditions.
What is the input offset voltage specification for TL031IP at 25°C?
For TL031IP (the 'I' grade in PDIP-8 package), the input offset voltage is specified as a maximum of 1.5 mV at 25°C under ±15 V supply conditions, per Table 5.6 in the TI datasheet SLOS180D. The typical value is 0.5 mV, and the full −40°C to +85°C range maximum is 3.3 mV - all verified in the "TL031I Electrical Characteristics" table.
Which package variants are available for TL031IP?
TL031IP is offered exclusively in the 8-pin PDIP (plastic dual in-line package) with dimensions 9.81 mm × 9.43 mm. While the broader TL031 family includes SOIC-8 (TL031ID) and TSSOP variants, the 'P' suffix in TL031IP specifically denotes the PDIP-8 package - confirmed in TI's "Device Information" table and orderable part number documentation.
How does TL031IP compare to TL061 in terms of power and performance?
TL031IP directly upgrades TL061 with identical pinout and supply requirements but delivers higher slew rate (2.9 V/μs vs. 3.5 V/μs typ for TL061), lower input offset voltage (1.5 mV max vs. 15 mV max), and improved CMRR (94 dB vs. 80 dB) - all while maintaining comparable supply current (250 μA max). These enhancements are documented in TI's "Features" section as "direct upgrades for the TL06x low-power amplifiers".
TL031IP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 5.1V/µs
- Gain Bandwidth Product:
- 1.1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 217µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL031IP FAQ
1.How can I place an order for TL031IP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL031IP 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 TL031IP reliable?
The price and inventory of TL031IP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL031IP is usually 5 days.
3.What payment methods are accepted for TL031IP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL031IP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL031IP?
TL031IP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL031IP 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 TL031IP?
For technical support, including TL031IP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL031IP requirements.
6.How does Aetrix verify that TL031IP is sourced from the original manufacturer or authorized distributors?
All TL031IP 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 TL031IP meets industry standards.
7.What is the process for return or replacement of TL031IP?
All TL031IP units undergo pre-shipment inspection (PSI). If there is an issue with TL031IP, 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 TL031IP part is unused and in its original packaging.
Return procedure for TL031IP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL031IP Tags
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