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Texas Instruments TL971ID
- Part No.:
- TL971ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL971ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,419
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Product details
Overview
TL971ID from Texas Instruments is a single-channel rail-to-rail output operational amplifier optimized for low-noise audio preamplification and portable battery-powered systems. It delivers 4.4 nV/√Hz input voltage noise, ±2.4 V output swing at ±2.5 V supply, 10.6 MHz gain-bandwidth product, and operates from 2.7 V to 12 V supply. It is used in high-fidelity headphone amplifiers and sensor signal conditioning stages where dynamic range and low distortion are critical.
For engineers reviewing the TL971ID datasheet, TL971ID pinout, TL971ID application, or TL971ID equivalent, this page provides verified technical context, SOIC-8 package mapping, real-world audio and instrumentation use cases, and two validated alternative op-amps with documented functional and application-level differences.
Technical Context
The TL971ID uses a complementary-input stage architecture enabling rail-to-rail common-mode input range (VCC– +1.15 V to VCC+ –1.15 V) and rail-to-rail output swing (±2.4 V at ±2.5 V). Its 10.6 MHz GBWP and 60° phase margin support stable unity-gain and moderate-gain configurations up to 100 kHz without external compensation.
It features ultra-low input bias current (±0.01 nA typ), low input offset voltage drift (±0.25 µV/°C), and high CMRR (90 dB typ), making it suitable for precision DC-coupled sensor interfaces and AC-coupled audio paths requiring minimal DC error and wide bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports single-supply 3.3 V/5 V and dual-supply ±2.5 V/±5 V operation without level-shifting. |
| Input Voltage Noise | 4.4 nV/√Hz at 100 kHz - enables high-SNR preamplification of weak microphone or piezoelectric sensor signals. |
| Gain-Bandwidth Product | 10.6 MHz - allows stable closed-loop gain ≥10 up to ~1 MHz, sufficient for anti-aliasing filters and active EQ stages. |
| Output Swing | ±2.4 V at ±2.5 V supply - delivers >96% of full rail-to-rail dynamic range, maximizing headroom in low-voltage audio paths. |
| Input Offset Drift | ±0.25 µV/°C - ensures <1 µV total drift over –40°C to 125°C, critical for precision instrumentation front-ends. |
| CMRR | 90 dB typical - rejects common-mode interference from noisy digital supplies or shared ground returns in mixed-signal PCBs. |
| Quiescent Current | 2.8 mA per amplifier - balances performance and power efficiency for always-on sensor nodes and portable audio devices. |
Pinout & Package
TL971ID is housed in an 8-pin SOIC (D) package with 4.90 mm × 6.00 mm footprint and standard 1.27 mm pitch. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (unlimited floor life).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left floating or tied to ground; no routing or loading required. |
| 2 | IN– | Inverting input - accepts feedback network or signal source; high impedance (>10¹² Ω) minimizes loading on preceding stage. |
| 3 | IN+ | Non-inverting input - connects to sensor output or reference voltage; rail-to-rail common-mode range simplifies biasing. |
| 4 | VCC– | Negative supply pin - requires local 0.1 µF ceramic bypass capacitor to ground for PSRR optimization and stability. |
| 5 | OUT | Amplifier output - drives loads down to 2 kΩ; rail-to-rail swing enables direct interface to ADC inputs or speaker drivers. |
| 6 | VCC+ | Positive supply pin - shares same bypass requirement as VCC–; dual-supply operation supports symmetric signal handling. |
| 7 | NC | No internal connection - electrically isolated; may be used as thermal pad anchor or unused trace stub. |
| 8 | NC | No internal connection - not bonded; no electrical function; PCB layout may omit copper fill under this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ±2.4 V output at ±2.5 V supply - preserves >95% signal amplitude in low-voltage portable audio designs. |
| Very low input voltage noise | 4.4 nV/√Hz at 100 kHz - reduces audible hiss in microphone preamps and improves SNR in 24-bit audio chains. |
| Wide supply range | Operates from 2.7 V to 12 V - eliminates need for separate LDOs in multi-rail systems and supports legacy 9 V battery designs. |
| Low input offset drift | ±0.25 µV/°C - maintains calibration integrity across automotive and industrial temperature ranges without recalibration. |
| High CMRR | 90 dB typical - suppresses EMI-induced common-mode errors in motor control feedback loops and medical sensor interfaces. |
| Stable unity-gain configuration | 60° phase margin with 100 pF capacitive load - enables direct use as buffer without external compensation components. |
Applications
| Professional Audio Preamplifier | Portable Music Player Line-Out Stage |
|---|---|
Use Scenario: Amplifying low-level condenser microphone signals (–40 dBV) before ADC sampling in studio-grade USB audio interfaces. IC Role / Device Role / Timing Role: Single-supply non-inverting amplifier with 20 dB gain, DC-coupled input, and rail-to-rail output driving 10 kΩ ADC input. Use Value: 4.4 nV/√Hz noise floor ensures >110 dB SNR at 24-bit/96 kHz sampling; ±0.25 µV/°C drift prevents gain calibration drift during extended recording sessions. |
Use Scenario: Buffering DAC output in battery-powered Bluetooth headphones to drive 32 Ω dynamic drivers. IC Role / Device Role / Timing Role: Dual-supply voltage follower (unity gain) with ±2.5 V rails, delivering low-impedance drive and minimal THD. Use Value: ±2.4 V output swing maximizes loudness at 3.7 V Li-ion battery voltage; 2.8 mA quiescent current extends playback time beyond 10 hours. |
| Industrial Temperature Sensor Interface | Medical ECG Front-End Amplifier |
Use Scenario: Conditioning output of platinum RTD (PT100) bridge circuits in HVAC controllers operating from –40°C to 125°C. IC Role / Device Role / Timing Role: Instrumentation amplifier input stage with 100× gain, referenced to mid-supply, driving SAR ADC. Use Value: 90 dB CMRR rejects 50/60 Hz mains pickup; ±0.25 µV/°C offset drift ensures <0.1 °C measurement error across full temperature range. |
Use Scenario: First-stage amplification of microvolt-level ECG signals (0.5–5 mV) in wearable heart monitors with dry electrodes. IC Role / Device Role / Timing Role: High-input-impedance, low-noise non-inverting amplifier with 100× gain and 0.05–150 Hz bandpass filtering. Use Value: 4.4 nV/√Hz noise enables detection of 5 µV QRS complexes; rail-to-rail output accommodates variable battery voltage without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA377AIDR | Lower input voltage noise (4.5 nV/√Hz), higher GBWP (10 MHz), but higher quiescent current (2.9 mA); identical SOIC-8 package. | Better suited for high-frequency sensor interfaces (>100 kHz), less optimal for ultra-low-power portable audio due to higher ICC. | Select OPA377AIDR when bandwidth >10 MHz is required and power budget allows +0.1 mA per channel. |
| LMV721IDBVR | Higher input voltage noise (13 nV/√Hz), lower GBWP (1.5 MHz), but lower quiescent current (1.25 mA); SOT-23-5 package only. | Targeted at cost-sensitive, space-constrained applications where noise and bandwidth are secondary to size and power. | Choose LMV721IDBVR only for non-audio, low-speed signal conditioning where PCB area is constrained and noise <10 nV/√Hz is acceptable. |
Compared with OPA377AIDR and LMV721IDBVR, TL971ID offers the best balance of low noise (4.4 nV/√Hz), moderate bandwidth (10.6 MHz), and low power (2.8 mA) in the industry-standard SOIC-8 package-making it the preferred choice for audio and precision analog applications requiring proven rail-to-rail performance across –40°C to 125°C.
Availability
TL971ID is available at Aetrix Electronics and suitable for professional audio equipment, portable music players, industrial sensor interfaces, and medical ECG monitoring devices requiring stable component supply and long-term lifecycle support.
Supply support for TL971ID 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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and system-on-chip solutions since 1930.
The TL97x family was developed specifically for low-noise, rail-to-rail output applications in portable and battery-powered equipment, with emphasis on audio fidelity, sensor signal integrity, and wide supply voltage flexibility.
FAQ
What is the maximum supply voltage rating for TL971ID?
The absolute maximum supply voltage for TL971ID is 15 V across VCC+ and VCC– terminals. However, the recommended operating range is 2.7 V to 12 V. Exceeding 12 V risks exceeding thermal limits and degrading long-term reliability, while operation above 15 V causes permanent damage. Always include 0.1 µF ceramic bypass capacitors at both supply pins to maintain stability under transient loads.
Does TL971ID support true rail-to-rail input operation?
No, TL971ID does not support rail-to-rail input. Its common-mode input voltage range is specified as VCC– +1.15 V to VCC+ –1.15 V under recommended conditions. This means it cannot accept input signals within 1.15 V of either supply rail. For true rail-to-rail input capability, consider TI's OPA991 or similar complementary-input op-amps-not TL971ID.
Can TL971ID drive a 600 Ω audio load directly?
TL971ID can source/sink up to ±65 mA (typical), enabling direct drive of 600 Ω loads at ±2.4 V output swing (≈ ±4 mA required). However, sustained 600 Ω loading increases junction temperature and may reduce THD performance. For line-level outputs, use a series resistor (e.g., 100 Ω) to isolate the op-amp from cable capacitance and ensure stability with typical 100–200 pF loads.
Is TL971ID pin-compatible with other TL97x variants like TL972 or TL974?
No, TL971ID is not pin-compatible with TL972 or TL974. TL971ID is a single-channel device in SOIC-8 with NC pins at positions 1, 7, and 8. TL972 (dual) and TL974 (quad) use the same SOIC-8 or SOIC-14 footprints but assign different functions to pins 1, 7, and 8 (e.g., IN2+, OUT2, etc.). Swapping TL971ID for TL972ID would result in unconnected inputs and undefined behavior.
What is the thermal resistance (θJA) of TL971ID in SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for TL971ID in the SOIC-8 (D) package is 97 °C/W, measured per JESD 51-7. This value assumes standard JEDEC 2-layer board conditions. Actual θJA in end-equipment depends on PCB copper area, airflow, and nearby heat sources. At 2.8 mA quiescent current and 12 V supply, power dissipation is ~33.6 mW, resulting in <4 °C junction rise above ambient under typical conditions.
TL971ID 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:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL971ID FAQ
1.How can I place an order for TL971ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TL971ID 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 TL971ID reliable?
The price and inventory of TL971ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL971ID is usually 5 days.
3.What payment methods are accepted for TL971ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL971ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL971ID?
TL971ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL971ID 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 TL971ID?
For technical support, including TL971ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL971ID requirements.
6.How does Aetrix verify that TL971ID is sourced from the original manufacturer or authorized distributors?
All TL971ID 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 TL971ID meets industry standards.
7.What is the process for return or replacement of TL971ID?
All TL971ID units undergo pre-shipment inspection (PSI). If there is an issue with TL971ID, 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 TL971ID part is unused and in its original packaging.
Return procedure for TL971ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL971ID Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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