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Texas Instruments TL031ID
- Part No.:
- TL031ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL031ID.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:304
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Product details
Overview
TL031ID from Texas Instruments is a single-channel, JFET-input operational amplifier optimized for low-power, low-offset precision analog signal conditioning in industrial and power-conversion systems. It delivers 1.5 mV max input offset voltage (trimmed), 2.9 V/μs slew rate, 1.1 MHz unity-gain bandwidth, and operates from ±5 V to ±15 V supplies across –40°C to +85°C. It serves as a direct upgrade to TL061 in solar inverter feedback loops and motor drive current sensing.
For engineers reviewing the TL031ID datasheet, TL031ID pinout, TL031ID application, or TL031ID equivalent, this page provides verified specifications, SOIC-8 package details, offset-trimmed FET-input performance data, thermal derating guidance, and validated alternatives for high-impedance sensor interfacing and micropower DC-coupled amplification.
Technical Context
The TL031ID uses Texas Instruments' enhanced FET process to achieve improved AC response over TL06x while maintaining micropower operation (250 μA max supply current). Its JFET input stage provides 10¹² Ω input resistance and 4 pF input capacitance, enabling stable amplification of high-impedance sources without significant loading.
On-chip offset-voltage trimming ensures 1.5 mV max VIO at 25°C and 3.3 mV max over full temperature range (–40°C to +85°C), supporting precision DC-coupled designs. The device requires dual-supply biasing and observes strict common-mode input limits (e.g., –11.5 V to +14 V at ±15 V supplies) to avoid saturation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1.5 mV max at 25°C; enables <1 LSB error in 12-bit ADC front-ends with gain ≤100 |
| Slew Rate | 2.9 V/μs (positive), 5.1 V/μs (negative); supports 100 kHz full-power sine wave output into 10 kΩ |
| Unity-Gain Bandwidth | 1.1 MHz; allows stable closed-loop gain ≥10 up to ~100 kHz with 60° phase margin |
| Supply Current | 250 μA max per amplifier; enables battery-powered sensor nodes with >1-year runtime on coin cell |
| Input Resistance | 10¹² Ω; prevents loading of piezoelectric sensors, pH electrodes, and photodiode transimpedance nodes |
| Common-Mode Range | –11.5 V to +14 V at ±15 V supplies; requires external DC bias for single-supply operation |
| Operating Temperature | –40°C to +85°C (I-suffix); qualified for industrial motor drives and solar string inverters |
Pinout & Package
TL031ID is housed in an 8-pin SOIC (D package), 4.9 mm × 6.0 mm body size, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OFFSET N1 | Offset null adjustment terminal - connect external 10-kΩ potentiometer wiper between Pins 1 and 5 for fine-tuning |
| 2 | IN– | Inverting input - high-impedance JFET node; sensitive to PCB leakage and guard ring requirements |
| 3 | IN+ | Non-inverting input - matched to IN– for CMRR >70 dB; requires symmetrical layout for best rejection |
| 4 | VCC– | Negative supply rail - must be decoupled locally with 0.1 μF ceramic capacitor to ground |
| 5 | OFFSET N2 | Offset null adjustment terminal - connects opposite end of same potentiometer used on Pin 1 |
| 6 | OUT | Amplifier output - capable of ±14.955 V swing into 10 kΩ load at ±15 V supplies |
| 7 | VCC+ | Positive supply rail - decoupling required; noise on this rail directly modulates output via 140 dB SVR |
| 8 | NC | No connect - leave unconnected; not internally bonded; avoids accidental shorting or parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| On-chip offset trimming | Reduces initial VIO to ≤1.5 mV, eliminating manual calibration in production test for cost-sensitive industrial modules |
| FET input architecture | Delivers 10¹² Ω input resistance and sub-100 pA input bias current, enabling direct connection to high-Z sensors |
| Enhanced slew rate vs. TL061 | 2.9 V/μs positive SR (vs. 3.5 V/μs for TL061) with identical 250 μA supply current - improves transient fidelity without power penalty |
| Extended temperature grade | Specified from –40°C to +85°C (I-suffix), supporting deployment in outdoor solar inverters and factory-floor motor controllers |
| Dual-supply operation | Validated at ±5 V and ±15 V, simplifying integration into legacy industrial control systems using bipolar rails |
Applications
| Solar Inverter String Monitoring | Industrial Motor Drive Current Sensing |
|---|---|
|
Use Scenario: Amplifying millivolt-level shunt voltage in photovoltaic string combiner boxes under wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision DC-coupled difference amplifier with offset-trimmed input stage for bidirectional current measurement. Use Value: 1.5 mV max VIO and 6.2 μV/°C tempco ensure <±0.5% full-scale error over –25°C to +60°C operating range. |
Use Scenario: Conditioning isolated current transformer outputs in AC servo drive power stages. IC Role / Device Role / Timing Role: High-input-impedance buffer and level-shifter before ADC sampling at 10–20 kHz. Use Value: 10¹² Ω input resistance prevents CT secondary loading; 1.1 MHz GBW supports accurate harmonic content up to 5 kHz. |
| Single-Phase Online UPS Feedback | High-Voltage Battery Management Systems |
|
Use Scenario: Scaling and offsetting inverter output voltage for closed-loop regulation in line-interactive UPS units. IC Role / Device Role / Timing Role: Precision gain-setting amplifier in voltage feedback path with tight DC accuracy requirements. Use Value: 130 dB open-loop gain and 94 dB CMRR maintain regulation accuracy despite noisy half-bridge switching noise coupling. |
Use Scenario: Amplifying cell voltage signals in 48–60 V Li-ion battery packs where leakage current must be minimized. IC Role / Device Role / Timing Role: Low-bias-current buffer for passive cell monitoring IC inputs requiring <100 pA leakage. Use Value: 10 pA typical IIB at 25°C and <0.45 nA at 85°C prevent cell voltage drift during long-term standby monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL061CDR | Higher 3.5 mV max VIO, lower 3.5 V/μs slew rate, same SOIC-8 package and pinout | Acceptable where DC accuracy <±5 mV and bandwidth <500 kHz suffice | Select when cost sensitivity outweighs need for trimmed offset or faster settling |
| TLE2061ACD | Lower 0.5 mV max VIO, higher 2.8 V/μs slew rate, 2× supply current (500 μA), same SOIC-8 footprint | Preferred for ultra-low-offset, low-noise applications where power budget allows | Choose when system-level accuracy demands <0.75 mV total error and noise floor <30 nV/√Hz is critical |
Compared with TL031ID, TL061CDR trades offset and speed for lower cost and identical layout, while TLE2061ACD delivers superior DC precision and noise performance at double the quiescent current - making TL031ID the optimal balance for industrial-grade micropower precision amplification.
Availability
TL031ID is available at Aetrix Electronics and suitable for solar energy string monitoring, industrial motor drive current sensing, and single-phase online UPS feedback requiring stable component supply, extended temperature qualification, and JFET-input impedance integrity.
Supply support for TL031ID 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The TL03x family was designed specifically to upgrade TL06x-based systems with improved DC accuracy and AC performance while retaining micropower operation - targeting solar inverters, motor controls, and precision instrumentation.
FAQ
What is the maximum input offset voltage specification for TL031ID over its full operating temperature range?
The TL031ID has a maximum input offset voltage of 3.3 mV across its full operating temperature range of –40°C to +85°C, as specified in Section 5.6 of the official TI datasheet. This value reflects the worst-case trimmed offset after manufacturing, ensuring predictable DC error in precision sensor interfaces and feedback networks without post-production calibration.
Can TL031ID operate from a single 5-V supply, and what design considerations apply?
TL031ID is characterized for dual-supply operation (±5 V to ±15 V) and is not specified for true single-supply use. To operate from a 5-V rail, designers must establish a virtual ground at 2.5 V (e.g., using TI's TLE2426), bias inputs within the common-mode range (–1.5 V to +4 V referenced to virtual ground), and terminate loads accordingly - otherwise, output swing and input behavior become undefined.
How does the offset nulling capability of TL031ID differ from standard TL061, and what is its practical implementation?
TL031ID provides dedicated OFFSET N1 (Pin 1) and OFFSET N2 (Pin 5) terminals for external nulling, unlike TL061 which lacks these pins. A 10-kΩ potentiometer is connected with its ends to Pins 1 and 5 and its wiper to VCC– (Pin 4), allowing real-time adjustment of input offset down to <0.5 mV - essential for zero-drift requirements in weigh scale and medical sensor front-ends.
What is the thermal resistance (θJA) of TL031ID in its SOIC-8 package, and how does it impact power dissipation at elevated ambient temperatures?
The TL031ID in SOIC-8 (D package) has a junction-to-ambient thermal resistance (θJA) of 97°C/W, as documented in Section 5.2 of the datasheet. At 250 μA supply current and ±15 V supplies, power dissipation is ~7.5 mW; thus, a 50°C ambient yields only ~0.7°C junction rise - confirming suitability for sealed enclosures in industrial environments without forced airflow.
Is TL031ID pin-compatible with TL031CD, and what are the key functional differences between the 'I' and 'C' suffix variants?
Yes, TL031ID and TL031CD share identical SOIC-8 pinouts and electrical functionality, differing only in temperature rating: TL031ID is rated for –40°C to +85°C, while TL031CD is limited to 0°C to +70°C. All key parameters - including 1.5 mV max VIO, 2.9 V/μs slew rate, and 1.1 MHz bandwidth - are identical across both variants at their respective operating ranges.
TL031ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL031ID FAQ
1.How can I place an order for TL031ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TL031ID 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 TL031ID reliable?
The price and inventory of TL031ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL031ID is usually 5 days.
3.What payment methods are accepted for TL031ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL031ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL031ID?
TL031ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL031ID 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 TL031ID?
For technical support, including TL031ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL031ID requirements.
6.How does Aetrix verify that TL031ID is sourced from the original manufacturer or authorized distributors?
All TL031ID 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 TL031ID meets industry standards.
7.What is the process for return or replacement of TL031ID?
All TL031ID units undergo pre-shipment inspection (PSI). If there is an issue with TL031ID, 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 TL031ID part is unused and in its original packaging.
Return procedure for TL031ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL031ID Tags
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