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Texas Instruments TL031CDR
- Part No.:
- TL031CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL031CDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,743
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Product details
Overview
TL031CDR from Texas Instruments is a single-channel FET-input operational amplifier optimized for low-power, low-offset precision analog signal conditioning in industrial and energy systems. It delivers 1.1 MHz unity-gain bandwidth, ±15 V supply operation, 2.9 V/μs slew rate, 1.5 mV max input offset voltage (C-suffix), and 1012 Ω input resistance - enabling high-impedance sensor interfacing in solar inverter feedback loops.
For engineers reviewing the TL031CDR datasheet, TL031CDR pinout, TL031CDR application, or TL031CDR equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in motor drive current sensing and UPS voltage regulation, and validated alternative parts with documented parameter trade-offs.
Technical Context
The TL031CDR uses TI's enhanced LinCMOS™ FET process to achieve micropower operation (250 μA max supply current) while improving AC performance over legacy TL06x amplifiers - including higher slew rate and bandwidth without increased quiescent current. Its JFET input stage ensures ultra-low input bias current (≤200 pA at 70°C) and high DC precision via on-chip offset trimming.
Designed for dual-supply operation, it requires careful attention to common-mode input range (–11.5 V to +14 V at ±15 V supplies) and output swing limits (±14.955 V into 10 kΩ). Single-supply use demands external DC biasing and virtual-ground generation, such as with the TLE2426.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±5 V to ±15 V - supports standard industrial dual-rail power domains without level-shifting |
| Input Offset Voltage | 1.5 mV max (25°C, ±15 V) - enables accurate DC-coupled amplification of mV-level sensor signals |
| Slew Rate | 2.9 V/μs (positive), 5.1 V/μs (negative) - sufficient for 100 kHz sinusoidal signals with <1% distortion |
| Unity-Gain Bandwidth | 1.1 MHz - allows stable closed-loop gain up to ~10× at 100 kHz |
| Input Bias Current | 200 pA max (70°C) - preserves signal integrity when driving from >100 MΩ sources like piezoelectric sensors |
| Common-Mode Range | –11.5 V to +14 V (±15 V supplies) - accommodates rail-to-rail input signals in mid-supply referenced circuits |
| Output Swing | ±14.955 V into 10 kΩ - delivers full dynamic range near supply rails for high-fidelity signal reproduction |
Pinout & Package
TL031CDR is supplied in an 8-pin SOIC (D) package measuring 4.9 mm × 6 mm, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must remain unconnected per datasheet; floating or tied to ground degrades PSRR |
| 2 | IN– | Inverting input - accepts feedback network for stable closed-loop configurations (e.g., transimpedance amps) |
| 3 | IN+ | Non-inverting input - high-impedance node for direct sensor connection or reference voltage injection |
| 4 | VCC– | Negative supply rail - must be decoupled locally with ≥0.1 μF ceramic capacitor to suppress noise coupling |
| 5 | NC | No connect - electrically isolated; PCB trace removal recommended to avoid parasitic capacitance |
| 6 | OUT | Amplified output - drives loads ≥10 kΩ directly; lower impedances require external buffer stage |
| 7 | VCC+ | Positive supply rail - shares decoupling with VCC–; star-point grounding improves CMRR |
| 8 | NC | No connect - no internal connection; routing stubs must be minimized to prevent EMI pickup |
Key Features
| Feature | Design Value |
|---|---|
| On-chip offset trimming | Reduces initial VIO to ≤1.5 mV - eliminates manual potentiometer adjustment in production calibration |
| FET input architecture | 1012 Ω input resistance and ≤200 pA bias current - preserves signal amplitude from high-Z sources |
| Low power consumption | 250 μA max supply current - enables battery-powered monitoring nodes with multi-year runtime |
| Enhanced AC performance | 2.9 V/μs slew rate and 1.1 MHz GBW - outperforms TL061 while maintaining same quiescent current |
| Wide supply range | Operates from ±5 V to ±15 V - simplifies design reuse across 5 V control logic and ±12 V analog subsystems |
Applications
| Solar Inverter Voltage Feedback | Motor Drive Current Sensing |
|---|---|
Use Scenario: Monitoring DC-link voltage in string inverters using resistive divider networks. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for high-impedance voltage divider output before ADC sampling. Use Value: 1.5 mV max VIO ensures <0.01% measurement error at 150 V full-scale, critical for MPPT accuracy. | Use Scenario: Amplifying mV-level shunt resistor signals in AC servo drive phase legs. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end stage. Use Value: 200 pA max IIB prevents shunt resistor loading error; 30 nV/√Hz noise maintains SNR >70 dB at 10 kHz. |
| Single-Phase Online UPS Regulation | Industrial Sensor Signal Conditioning |
Use Scenario: Closed-loop regulation of output AC waveform amplitude via transformer feedback. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output to reference in voltage control loop. Use Value: 1.1 MHz GBW supports fast transient response (<100 μs settling) to load steps without instability. | Use Scenario: Conditioning outputs from thermocouples, RTDs, or strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: High-Z buffer and gain stage preceding anti-aliasing filter and SAR ADC. Use Value: 1012 Ω input resistance avoids thermal EMF errors; ±15 V supply headroom accommodates wide sensor ranges. |
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 input offset (15 mV max), slower slew rate (0.35 V/μs), same SOIC-8 package | Lower precision, reduced bandwidth - suitable only where cost is primary constraint and DC accuracy <1% | Select TL061CDR only if system tolerates 10× higher VIO and does not require >100 kHz signal fidelity. |
| TLC271CDR | Lower VIO (2 mV max), rail-to-rail output, but higher supply current (1.2 mA), different pinout | Enables single-supply designs without virtual ground; consumes 4× more power than TL031CDR | Choose TLC271CDR when rail-to-rail output swing is mandatory and power budget allows ≥1 mA per channel. |
Compared with TL061CDR, TL031CDR delivers 10× better DC accuracy and 8× faster slew rate at identical power; versus TLC271CDR, TL031CDR offers 5× lower quiescent current but lacks rail-to-rail output - making it optimal for dual-supply, low-power, high-impedance sensor interfaces.
Availability
TL031CDR is available at Aetrix Electronics and suitable for solar inverter voltage monitoring, motor drive current sensing, and single-phase UPS regulation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TL031CDR 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 industrial-grade signal chain solutions.
The TL03x family was engineered to replace TL06x amplifiers in demanding industrial applications - delivering superior DC accuracy, higher speed, and robustness across –40°C to 85°C environments without increasing power.
FAQ
What is the maximum operating temperature range for TL031CDR?
The TL031CDR is characterized for operation from 0°C to 70°C (C-suffix grade). It meets all electrical specifications across this range, including input offset voltage drift ≤5.9 μV/°C and supply current ≤280 μA at 70°C. For extended temperature applications (–40°C to 85°C), the TL031IDR variant is specified.
Can TL031CDR operate from a single 5-V supply?
TL031CDR is designed for dual-supply operation and does not support true single-supply use without external biasing. When powered from +5 V and GND, its common-mode input range is limited to –1.5 V to +4 V and output swing to +3 V to +4.995 V. A virtual-ground generator (e.g., TLE2426) or DC bias network is required to establish mid-rail reference for proper linear operation.
What is the input capacitance of TL031CDR and how does it affect stability?
TL031CDR has a typical input capacitance of 4 pF per input terminal. This low value minimizes phase lag in high-impedance feedback networks and reduces susceptibility to oscillation when driving capacitive loads >100 pF. Stability is further ensured by 60° phase margin at unity gain, allowing direct connection to 10 kΩ || 25 pF loads without compensation.
How does TL031CDR compare to TL031ACDR in terms of offset voltage?
TL031CDR specifies a maximum input offset voltage of 1.5 mV at 25°C and ±15 V supplies, while TL031ACDR achieves tighter grading at 1.5 mV max under identical conditions - with improved typical performance (0.34 mV vs. 0.5 mV). The 'A' suffix denotes enhanced trimming, yielding lower initial error and reduced long-term drift (0.04 μV/month).
Is TL031CDR pin-compatible with other members of the TL03x family?
TL031CDR (single-channel) uses an 8-pin SOIC package with NC pins at positions 1, 5, and 8. It is not pin-compatible with TL032CDR (dual, 8-pin) or TL034CDR (quad, 14-pin), which have different pinouts and channel counts. Direct substitution requires PCB redesign; however, functional equivalents exist within the same package footprint only for single-channel variants (e.g., TL031ACDR).
TL031CDR 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:
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL031CDR FAQ
1.How can I place an order for TL031CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL031CDR 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 TL031CDR reliable?
The price and inventory of TL031CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL031CDR is usually 5 days.
3.What payment methods are accepted for TL031CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL031CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL031CDR?
TL031CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL031CDR 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 TL031CDR?
For technical support, including TL031CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL031CDR requirements.
6.How does Aetrix verify that TL031CDR is sourced from the original manufacturer or authorized distributors?
All TL031CDR 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 TL031CDR meets industry standards.
7.What is the process for return or replacement of TL031CDR?
All TL031CDR units undergo pre-shipment inspection (PSI). If there is an issue with TL031CDR, 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 TL031CDR part is unused and in its original packaging.
Return procedure for TL031CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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