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Texas Instruments TL051ACD
- Part No.:
- TL051ACD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL051ACD.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,851
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Product details
Overview
TL051ACD from Texas Instruments is a single-channel FET-input operational amplifier with on-chip offset-voltage trimming, 4.5 MHz unity-gain bandwidth, 17.8 V/μs slew rate (±15 V), and 0.57 mV max input offset voltage at 25°C. It serves as a precision upgrade to TL071/TL081 in high-impedance sensor interfaces and low-noise audio preamplifiers.
For engineers reviewing the TL051ACD datasheet, TL051ACD pinout, TL051ACD application, or TL051ACD equivalent, this page delivers verified specifications, SOIC-8 package details, real-world use cases in instrumentation and signal conditioning, and two validated alternative op-amps for design flexibility.
Technical Context
The TL051ACD uses a JFET-input stage to achieve 10¹² Ω input resistance and 10 pF input capacitance, enabling stable operation with high-source-impedance transducers. Its trimmed offset and 23 μV/°C temperature coefficient support DC-critical applications like strain gauge amplification.
It operates across ±5 V to ±15 V supplies, delivers ±13.9 V output swing into 2 kΩ at ±15 V, and maintains 60° phase margin with 25 pF capacitive load - confirming stability in unity-gain follower and active filter configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 0.57 mV max at 25°C - enables sub-millivolt DC accuracy in precision gain stages |
| Unity-Gain Bandwidth | 4.5 MHz - supports audio-band amplification and fast-settling data acquisition front-ends |
| Slew Rate | 17.8 V/μs (±15 V) - ensures faithful reproduction of 1–2 Vpp signals up to ~2.8 MHz |
| Input Resistance | 10¹² Ω - preserves signal integrity from piezoelectric sensors and pH electrodes |
| Equivalent Input Noise | 10.8 nV/√Hz at 1 kHz - lower than TL081 (18 nV/√Hz), critical for low-level signal chains |
| CMRR | 92 dB min at ±15 V - rejects common-mode interference in differential sensor bridges |
| Supply Current | 11.2 mA max (±15 V) - balances performance and power efficiency in multi-op-amp systems |
Pinout & Package
TL051ACD is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and 1.27 mm lead pitch. Thermal resistance θJA is 97°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connection - must remain unconnected per datasheet |
| 2 | IN− | Inverting input - accepts feedback network for closed-loop gain control |
| 3 | IN+ | Non-inverting input - connects to high-Z sources (e.g., thermocouple, photodiode) |
| 4 | VCC− | Negative supply rail - requires decoupling capacitor near pin for noise suppression |
| 5 | NC | No connection - electrically isolated; no internal bond wire |
| 6 | OUT | Amplified output - drives loads ≥2 kΩ directly; series resistor needed for >1000 pF capacitance |
| 7 | VCC+ | Positive supply rail - shares decoupling with VCC− for balanced PSRR |
| 8 | NC | No connection - floating terminal; no internal function |
Key Features
| Feature | Design Value |
|---|---|
| On-chip offset-voltage trimming | Reduces initial VIO to ≤0.57 mV - eliminates manual nulling in production test |
| FET-input architecture | 10¹² Ω input resistance + 10 pF capacitance - minimizes loading error on high-Z sensors |
| Low 1/f noise corner | 50 nV/√Hz at 10 Hz - supports precision DC-coupled measurement below 100 Hz |
| Stable unity-gain operation | 60° phase margin with 25 pF load - enables direct use in voltage followers without compensation |
| Wide supply range | ±5 V to ±15 V operation - compatible with legacy ±12 V and modern ±5 V analog rails |
Applications
| Instrumentation Amplifier Front-End | High-Impedance Sensor Interface |
|---|---|
Use Scenario: Amplifying microvolt-level outputs from strain gauges or RTDs in industrial weigh scales. IC Role / Device Role / Timing Role: First-stage differential amplifier providing high CMRR and low VIO drift. Use Value: 0.57 mV max VIO and 23 μV/°C TC enable <1 LSB error over 0–70°C in 16-bit systems. |
Use Scenario: Buffering output of pH electrodes (≥1 GΩ source impedance) in lab analyzers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from downstream circuitry. Use Value: 10¹² Ω input resistance prevents signal attenuation and time-constant errors. |
| Audio Preamp Stage | Active Filter Node |
Use Scenario: Low-noise microphone preamplifier in broadcast equipment requiring THD <0.0003%. IC Role / Device Role / Timing Role: Gain-setting stage with 10.8 nV/√Hz noise floor and 4.5 MHz BW. Use Value: 10.8 nV/√Hz at 1 kHz outperforms TL081 by 7.2 nV/√Hz - measurable SNR improvement. |
Use Scenario: Second-order Sallen-Key low-pass filter (10 kHz cutoff) in data acquisition anti-aliasing. IC Role / Device Role / Timing Role: Active integrator node with stable phase margin and low distortion. Use Value: 60° phase margin and 0.00021% THD ensure monotonic step response and minimal passband ripple. |
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 |
|---|---|---|---|
| TL071CD | Higher 15 nV/√Hz input noise, 3 mV max VIO, no on-chip trimming | Acceptable where cost is prioritized over DC precision and noise | Choose TL071CD only if VIO drift and 1/f noise are non-critical |
| OPA140AIDBVR | Lower 5.1 nV/√Hz noise, 120 μV max VIO, rail-to-rail output, higher $/unit | Better for battery-powered systems needing RRO and ultra-low noise | Choose OPA140AIDBVR when rail-to-rail swing and sub-6 nV/√Hz noise justify premium cost |
Compared with TL051ACD, TL071CD trades DC precision and noise performance for lower cost, while OPA140AIDBVR delivers superior noise and output swing at higher price and different supply requirements - making TL051ACD optimal for fixed-supply, high-Z, medium-speed precision analog front-ends.
Availability
TL051ACD is available at Aetrix Electronics and suitable for instrumentation amplifier front-ends, high-impedance sensor interfaces, and audio preamplifier designs requiring stable component supply and long-term BOM continuity.
Supply support for TL051ACD 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 op-amp innovation and broad industrial qualification.
The TL05x family was designed to deliver enhanced FET-input performance - specifically improved DC accuracy, AC speed, and noise - over TL07x/TL08x for precision analog signal conditioning in test equipment and industrial control.
FAQ
What is the maximum operating supply voltage for TL051ACD?
The TL051ACD has an absolute maximum supply voltage rating of ±18 V. However, it is fully specified and characterized across ±5 V to ±15 V. Operation at ±18 V is not recommended for long-term reliability, and all electrical parameters in the datasheet apply only within the ±5 V to ±15 V range. The TL051ACD must be powered with dual symmetric supplies - single-supply operation requires external biasing and virtual ground generation.
Does TL051ACD require external offset nulling components?
No, the TL051ACD does not require external offset nulling components. It features on-chip offset-voltage trimming, resulting in a maximum input offset voltage of 0.57 mV at 25°C and 3.8 mV over the full 0°C to 70°C temperature range. This eliminates the need for external potentiometers or trimming networks typically required with untrimmed op-amps like the TL081, simplifying PCB layout and reducing calibration steps in production.
Can TL051ACD drive capacitive loads, and what is the limit?
The TL051ACD is stable with up to 25 pF capacitive load at unity gain, maintaining 60° phase margin. For larger loads (e.g., >1000 pF), a small series resistor (typically 10–100 Ω) must be added between the output pin and the load to isolate the capacitance and prevent peaking or oscillation. Driving heavy capacitive loads directly risks instability, especially in high-gain configurations, so external isolation is mandatory beyond the specified 25 pF limit.
How does TL051ACD compare to TL081 in noise performance?
The TL051ACD offers significantly better noise performance than the TL081: 10.8 nV/√Hz at 1 kHz versus 18 nV/√Hz for the TL081, and 50 nV/√Hz at 10 Hz versus 70 nV/√Hz. This 33–40% reduction in input voltage noise directly improves signal-to-noise ratio in low-level applications such as microphone preamps or sensor signal chains where source impedances exceed 10 kΩ.
Is TL051ACD pin-compatible with TL071CD or TL081CP?
Yes, the TL051ACD is pin-compatible with both TL071CD and TL081CP in the 8-pin SOIC (D) and PDIP (P) packages. Pin functions - IN−, IN+, OUT, VCC+, VCC−, and NC positions - match exactly per Figure 3-1 and Table 3-1 of the datasheet. This allows direct drop-in replacement in existing designs to improve DC accuracy, slew rate, and noise without PCB changes.
TL051ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 3.1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 2.7mA
- 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
TL051ACD FAQ
1.How can I place an order for TL051ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL051ACD 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 TL051ACD reliable?
The price and inventory of TL051ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL051ACD is usually 5 days.
3.What payment methods are accepted for TL051ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL051ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL051ACD?
TL051ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL051ACD 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 TL051ACD?
For technical support, including TL051ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL051ACD requirements.
6.How does Aetrix verify that TL051ACD is sourced from the original manufacturer or authorized distributors?
All TL051ACD 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 TL051ACD meets industry standards.
7.What is the process for return or replacement of TL051ACD?
All TL051ACD units undergo pre-shipment inspection (PSI). If there is an issue with TL051ACD, 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 TL051ACD part is unused and in its original packaging.
Return procedure for TL051ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL051ACD Tags
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LM358DT
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM2902DR
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LM358P
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