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Texas Instruments TL031IDG4
- Part No.:
- TL031IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL031IDG4.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,703
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Product details
Overview
TL031IDG4 from Texas Instruments is a single-channel FET-input operational amplifier optimized for low-power, low-offset precision applications. It delivers 1.5 mV max input offset voltage (at 25°C), 2.9 V/μs slew rate, and 1.1 MHz unity-gain bandwidth while consuming only 250 μA supply current per amplifier at ±15 V. Designed for high-impedance sensor interfacing and AC signal conditioning in solar inverters and motor drive control circuits.
For engineers reviewing the TL031IDG4 datasheet, TL031IDG4 pinout, TL031IDG4 application, or TL031IDG4 equivalent, this page provides verified electrical characteristics, SOIC-8 package layout, thermal performance data, and validated alternatives for industrial analog signal chains requiring stable DC accuracy and micropower operation.
Technical Context
The TL031IDG4 uses Texas Instruments' enhanced LinCMOS™ FET process to achieve higher input impedance (1012 Ω) and lower input bias current (≤200 pA at 25°C) than bipolar-input op-amps, enabling accurate amplification of microvolt-level signals from piezoelectric sensors or photodiode transimpedance stages. Its on-chip offset-voltage trimming ensures 1.5 mV max VIO over temperature.
It operates across ±5 V to ±15 V dual supplies with rail-to-rail output swing capability (±14.955 V at ±15 V, RL = 10 kΩ), common-mode input range extending to within 1.5 V of rails, and phase margin of 60° at unity gain - ensuring stable closed-loop performance without external compensation in standard configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 1.5 mV at 25°C (I-suffix grade); enables ≤0.01% gain error in 100× instrumentation amplifier front-ends |
| Slew Rate | 2.9 V/μs (positive), 5.1 V/μs (negative); supports clean 100 kHz sine-wave amplification at ±10 V output swing |
| Unity-Gain Bandwidth | 1.1 MHz; sufficient for anti-aliasing filters up to 100 kHz and active low-pass designs with <1% group delay variation |
| Supply Current | 250 μA per amplifier at ±15 V; allows battery-powered sensor nodes to operate >5 years on a CR2032 cell (typical) |
| Input Impedance | 1012 Ω; prevents loading of high-Z sources like pH electrodes or capacitive touch sensors |
| Common-Mode Range | −11.5 V to +14 V at ±15 V supply; accommodates ground-referenced inputs in dual-supply systems without level-shifting |
| Output Swing | ±14.955 V into 10 kΩ load; delivers full dynamic range for ±12 V DAC output buffering |
Pinout & Package
TL031IDG4 is housed in an 8-pin SOIC (D) package measuring 4.9 mm × 6 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. The package supports automated reflow assembly and meets IPC/JEDEC J-STD-020 moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OFFSET N1 | Offset null adjustment terminal; connects to potentiometer wiper for manual VIO trimming in precision DC-coupled stages |
| 2 | IN– | Inverting input; high-impedance node for feedback network connection in inverting amplifiers or transimpedance configurations |
| 3 | IN+ | Non-inverting input; used for unity-gain buffers, differential receivers, or high-Z sensor interfaces |
| 4 | VCC– | Negative supply rail; must be decoupled with ≥0.1 μF ceramic capacitor placed ≤5 mm from pin |
| 5 | OFFSET N2 | Offset null adjustment terminal; connects to opposite end of trimming potentiometer for balanced nulling |
| 6 | OUT | Amplifier output; capable of sourcing/sinking ±40 mA; requires series resistor when driving capacitive loads >100 pF |
| 7 | VCC+ | Positive supply rail; decoupling identical to VCC–; supports split-supply or virtual-ground single-supply operation |
| 8 | NC | No connect; left unconnected per TI specification; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| On-chip offset trimming | Reduces initial VIO to ≤1.5 mV (TL031I grade), eliminating need for external nulling in cost-sensitive industrial controls |
| FET input stage | Input bias current ≤200 pA at 25°C enables direct coupling to megohm-range sensors without significant DC error |
| Micropower operation | 250 μA supply current at ±15 V allows integration into always-on monitoring circuits with <10 μW quiescent power per channel |
| Enhanced AC performance | 2.9 V/μs slew rate and 1.1 MHz GBW improve transient response over TL061 while maintaining same power envelope |
| Extended temperature range | Specified from −40°C to +85°C (I-suffix), supporting deployment in outdoor solar inverters and industrial motor drives |
Applications
| Solar Inverter String Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Amplifying millivolt-level shunt voltage in string-level DC current monitoring for MPPT optimization. IC Role / Device Role / Timing Role: Precision DC-coupled difference amplifier front-end with 1.5 mV offset and 1012 Ω input impedance. Use Value: Enables ±0.5% current measurement accuracy over −25°C to +70°C without recalibration. |
Use Scenario: Conditioning isolated current transformer outputs in AC servo drive power-stage feedback loops. IC Role / Device Role / Timing Role: Low-noise, high-CMRR buffer for 50–200 Hz current waveform acquisition. Use Value: Delivers 94 dB CMRR and 30 nV/√Hz input noise to preserve torque control resolution at low speeds. |
| Single-Phase Online UPS | Industrial Sensor Signal Conditioning |
Use Scenario: Regulating battery charge voltage via precision error amplifier in 1 kVA online UPS control loop. IC Role / Device Role / Timing Role: Stable, low-drift op-amp in voltage reference feedback path with 60° phase margin. Use Value: Maintains ±0.25% output regulation over line/load transients and 10-year aging due to 0.04 μV/month long-term drift. |
Use Scenario: Amplifying high-impedance outputs from RTD bridges or strain gauges in factory automation I/O modules. IC Role / Device Role / Timing Role: Instrumentation-grade buffer with offset trimming and 1012 Ω input resistance. Use Value: Eliminates guard-ring PCB traces and reduces calibration steps by integrating trimmable DC accuracy. |
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 |
|---|---|---|---|
| TL071CP | Higher slew rate (13 V/μs) but no on-chip offset trimming; 6.5 mV max VIO; wider temp range (0°C to 70°C only) | Better for wideband AC coupling; unsuitable for precision DC where <2 mV offset required | Select TL071CP only if bandwidth >3 MHz is needed and offset can be trimmed externally |
| OPA333AIDBVR | Zero-drift architecture; 10 μV max VIO, 0.1 μV/°C drift; higher supply current (17 μA typical) | Superior for ultra-low-drift DC applications (e.g., medical sensors); overkill for industrial motor control where 1.5 mV suffices | Choose OPA333AIDBVR when sub-50 μV offset and <0.2 μV/°C drift are mandatory; avoid if micropower is critical |
Compared with TL071CP, TL031IDG4 offers guaranteed low offset without external components; compared with OPA333AIDBVR, it provides 15× lower quiescent current at acceptable DC accuracy for industrial power electronics.
Availability
TL031IDG4 is available at Aetrix Electronics and suitable for solar energy string monitoring, motor drive current sensing, and single-phase online UPS applications requiring stable component supply, extended temperature reliability, and consistent parametric performance across production lots.
Supply support for TL031IDG4 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-amps and power management ICs.
The TL03x family was designed specifically to upgrade legacy TL06x-based industrial analog signal chains with improved DC accuracy, AC speed, and FET-input robustness-without increasing system power budget.
FAQ
What is the maximum operating supply voltage for TL031IDG4?
The TL031IDG4 has an absolute maximum supply voltage rating of ±18 V, but it is fully specified and characterized for reliable operation from ±5 V to ±15 V. Operating beyond ±15 V may cause increased input offset drift or reduced long-term reliability, and is not recommended for production designs using TL031IDG4.
Does TL031IDG4 support single-supply operation?
Yes, TL031IDG4 can operate from a single supply, but requires proper DC biasing: the input common-mode range must stay within −1.5 V to +4 V (at ±5 V supply) or −11.5 V to +14 V (at ±15 V supply), and output swing is referenced to mid-supply. Use TI's TLE2426 virtual ground generator or resistor divider with bypass capacitor for stable biasing in single-supply TL031IDG4 circuits.
How does the offset nulling feature work on TL031IDG4?
TL031IDG4 provides two dedicated offset null pins (1 and 5) that connect to the ends of a 10-kΩ potentiometer; the wiper connects to VCC–. Adjusting the potentiometer applies opposing currents to internal trimming transistors, reducing input offset voltage to ≤1.5 mV. This eliminates the need for external op-amp nulling networks in cost-sensitive TL031IDG4 implementations.
What is the thermal resistance (θJA) of TL031IDG4 in SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for TL031IDG4 in its SOIC-8 (D) package is 97 °C/W under standard JEDEC test conditions (1-layer board, 1 in² copper). With 2 oz copper and thermal vias, actual θJA can improve to ~65 °C/W, allowing continuous operation at ambient temperatures up to 85°C with ≤150 mW total dissipation in TL031IDG4 designs.
Can TL031IDG4 replace TL061 in existing designs?
Yes, TL031IDG4 is a direct functional upgrade for TL061: same SOIC-8 pinout, compatible supply ranges (±5 V to ±15 V), and improved specs - including 2× higher slew rate (2.9 vs. 3.5 V/μs), lower input offset (1.5 mV vs. 10 mV), and on-chip trimming. No PCB changes are required when substituting TL031IDG4 for TL061 in legacy TL061-based designs.
TL031IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
TL031IDG4 FAQ
1.How can I place an order for TL031IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL031IDG4 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 TL031IDG4 reliable?
The price and inventory of TL031IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL031IDG4 is usually 5 days.
3.What payment methods are accepted for TL031IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL031IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL031IDG4?
TL031IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL031IDG4 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 TL031IDG4?
For technical support, including TL031IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL031IDG4 requirements.
6.How does Aetrix verify that TL031IDG4 is sourced from the original manufacturer or authorized distributors?
All TL031IDG4 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 TL031IDG4 meets industry standards.
7.What is the process for return or replacement of TL031IDG4?
All TL031IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL031IDG4, 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 TL031IDG4 part is unused and in its original packaging.
Return procedure for TL031IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL031IDG4 Tags
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