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STMicroelectronics TL071CDT
- Part No.:
- TL071CDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL071CDT.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,994
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Product details
Overview
TL071CDT from STMicroelectronics is a low-noise JFET-input single operational amplifier optimized for audio, instrumentation, and precision signal conditioning. It delivers 16 V/µs slew rate, 15 nV/√Hz input voltage noise (typ), 0.01% THD at 1 kHz, and operates from ±6 V to ±18 V supply rails in SO-8 package. Used in high-fidelity preamplifiers and active filters where low distortion and wide common-mode range are critical.
For engineers reviewing the TL071CDT datasheet, TL071CDT pinout, TL071CDT application, or TL071CDT equivalent, key selection criteria include input bias current (≤20 pA typ), offset voltage drift (10 µV/°C), output short-circuit protection, and JFET-input stage impedance (>10¹² Ω) - all verified under ±15 V, +25°C conditions per ST's Rev 3 specification.
Technical Context
The TL071CDT implements a monolithic JFET-bipolar hybrid architecture with internal frequency compensation for unity-gain stability. Its high-impedance JFET differential pair enables ultra-low input bias current and low noise performance across its full ±11 V common-mode input range.
It features dual offset-null pins (1 and 5) for precise DC calibration, latch-up-free operation, and rail-to-rail compatible output swing (±12 V into 10 kΩ). The device is not rail-to-rail input or output but supports inputs up to VCC+ and outputs within 1.5 V of rails under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±6 V to ±18 V - supports dual-rail industrial and audio systems without external regulators |
| Slew Rate | 16 V/µs (typ) - enables clean 20 kHz audio amplification with minimal transient distortion |
| Input Noise | 15 nV/√Hz (typ, 1 kHz) - critical for low-level sensor signal amplification without added noise floor |
| THD | 0.01 % (typ, 1 kHz, 2 Vpp) - meets hi-fi preamp linearity requirements |
| Input Bias Current | 20 pA (typ, +25°C) - preserves signal integrity in high-impedance transducer interfaces |
| CMRR | 86 dB (typ) - rejects power-supply and EMI-induced common-mode interference effectively |
| Gain Bandwidth | 4 MHz (typ) - sufficient for stable closed-loop gain ≥100 at audio frequencies |
Pinout & Package
TL071CDT is housed in an SO-8 (Small Outline, 8-pin) plastic micropackage compliant with JEDEC MS-012, measuring 4.90 mm × 6.00 mm × 1.75 mm (max height), with lead-free ECOPACK® finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null 1 | Connects to potentiometer wiper for manual input offset voltage trimming |
| 2 | Inverting Input | Differential input node accepting feedback network for stable closed-loop configurations |
| 3 | Non-inverting Input | High-impedance reference input used in follower, summing, or differential configurations |
| 4 | VCC− | Negative supply rail connection - must be decoupled locally to minimize noise coupling |
| 5 | Offset Null 2 | Second terminal of offset null potentiometer - completes DC calibration path |
| 6 | Output | Class-AB output stage capable of ±12 V swing into 10 kΩ, short-circuit protected |
| 7 | VCC+ | Positive supply rail connection - requires local 100 nF ceramic decoupling |
| 8 | No Connect | Internally unconnected - must remain floating; no external tie required |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Bias Current | 20 pA typ enables use with >1 MΩ source impedances without significant DC error |
| High Input Impedance | 10¹² Ω minimizes loading on passive filter networks and piezoelectric sensors |
| Output Short-Circuit Protection | Allows safe operation during fault conditions without external current limiting components |
| Wide Common-Mode Range | ±11 V (with ±15 V supplies) supports direct interfacing to bipolar DACs and ADC drivers |
| Latch-Up Free Operation | Guarantees immunity to destructive parasitic thyristor activation under overvoltage stress |
Applications
| Audio Preamplifier | Active Bandpass Filter |
|---|---|
Use Scenario: Low-noise microphone preamplifier stage in studio-grade audio interface. IC Role / Device Role / Timing Role: Single-ended JFET-input op-amp configured as non-inverting gain-of-100 amplifier with DC-coupled input. Use Value: 15 nV/√Hz noise and 0.01% THD preserve signal fidelity from 20 Hz–20 kHz without audible coloration. | Use Scenario: 1 kHz bandpass filter in vibration monitoring system for rotating machinery. IC Role / Device Role / Timing Role: High-Q active filter core using dual-feedback topology with precision resistors and NP0 capacitors. Use Value: 86 dB CMRR and 4 MHz GBW maintain center frequency accuracy and rejection of 50/60 Hz mains interference. |
| DC Precision Instrumentation | Signal Conditioning for Strain Gauges |
Use Scenario: Offset- and drift-compensated front-end for thermocouple amplifier with cold-junction compensation. IC Role / Device Role / Timing Role: Precision op-amp in instrumentation amplifier first stage with external offset nulling via pins 1 and 5. Use Value: 10 µV/°C offset drift and 20 pA input bias current reduce thermal error and leakage-induced zero-shift. | Use Scenario: Wheatstone bridge amplifier in load cell interface for industrial weighing scale. IC Role / Device Role / Timing Role: Low-noise, high-Z buffer and gain stage driving 16-bit SAR ADC with 100 kΩ input impedance. Use Value: 10¹² Ω input resistance prevents bridge imbalance errors; ±12 V output swing ensures full-scale ADC utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL071IDT | Wider operating temperature range (−40°C to +105°C) vs. TL071CDT (0°C to +70°C); identical electrical specs | Suitable for automotive engine control modules and industrial PLC I/O where ambient exceeds 70°C | Select TL071IDT when extended temperature operation is required; same footprint and pinout |
| OPA134UA | Lower noise (8 nV/√Hz), higher GBP (8 MHz), no offset null pins; SO-8 package | Better suited for ultra-low-noise audio paths but lacks user-adjustable offset trimming capability | Choose OPA134UA for noise-critical headphone amps; retain TL071CDT when DC calibration is mandatory |
Compared with TL071IDT, TL071CDT trades temperature margin for cost-sensitive commercial applications, while OPA134UA offers superior AC performance at the expense of DC adjustability - making TL071CDT optimal for calibrated, fixed-temperature instrumentation where offset tuning is essential.
Availability
TL071CDT is available at Aetrix Electronics and suitable for audio preamplifiers, active filter designs, precision instrumentation front-ends, and strain gauge signal conditioning requiring stable component supply across production volumes.
Supply support for TL071CDT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TL071 belongs to ST's legacy precision analog op-amp product line, engineered specifically for low-noise, high-input-impedance signal conditioning in audio, test equipment, and measurement systems.
FAQ
What is the maximum supply voltage for TL071CDT?
The absolute maximum supply voltage is ±18 V, but recommended operating range is ±6 V to ±18 V. Exceeding ±18 V risks permanent damage. Thermal derating applies above +70°C ambient - consult Rthja (125 °C/W for SO-8) to ensure junction temperature stays below 150°C under load.
Does TL071CDT require external compensation?
No - TL071CDT features internal frequency compensation optimized for unity-gain stability. It drives capacitive loads up to 100 pF directly without oscillation. For heavier loads (>200 pF), a series resistor (20–100 Ω) between output and load is recommended to maintain phase margin ≥45°.
Can TL071CDT drive a 600 Ω audio line?
Not directly - its specified output swing is ±12 V into 10 kΩ, degrading to ±8 V into 2 kΩ and insufficient for 600 Ω. Use a dedicated line driver (e.g., BUF634) or add a discrete emitter-follower stage. The TL071CDT is intended for buffered, high-impedance interstage connections, not low-Z transmission.
How do I use the offset null pins (1 and 5) on TL071CDT?
Connect a 10 kΩ potentiometer between pins 1 and 5, with wiper tied to VCC−. Adjust wiper until output voltage is <1 mV with inputs shorted and grounded. This nulls input offset voltage at room temperature; re-trim if ambient changes significantly, as drift is 10 µV/°C.
TL071CDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 16V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL071CDT FAQ
1.How can I place an order for TL071CDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL071CDT 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 TL071CDT reliable?
The price and inventory of TL071CDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL071CDT is usually 5 days.
3.What payment methods are accepted for TL071CDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL071CDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL071CDT?
TL071CDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL071CDT 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 TL071CDT?
For technical support, including TL071CDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL071CDT requirements.
6.How does Aetrix verify that TL071CDT is sourced from the original manufacturer or authorized distributors?
All TL071CDT 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 TL071CDT meets industry standards.
7.What is the process for return or replacement of TL071CDT?
All TL071CDT units undergo pre-shipment inspection (PSI). If there is an issue with TL071CDT, 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 TL071CDT part is unused and in its original packaging.
Return procedure for TL071CDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL071CDT Tags
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