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Texas Instruments TL971IDR
- Part No.:
- TL971IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL971IDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,309
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Product details
Overview
TL971IDR 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 TL971IDR datasheet, TL971IDR pinout, TL971IDR application, or TL971IDR equivalent, this page provides verified electrical specifications, SOIC-8 package layout guidance, real-world audio and instrumentation use cases, and two validated alternative op-amps with documented functional and application-level differences.
Technical Context
The TL971IDR employs a complementary-input-stage architecture enabling true rail-to-rail output swing while maintaining stable phase margin (60°) across 2.7–12 V supplies and capacitive loads up to 250 pF. Its input stage uses paralleled NMOS and PMOS differential pairs to extend common-mode range to both supply rails, with performance degradation confined to a narrow transition region near VCC+ − 1.5 V.
It achieves low distortion (0.003% THD at 1 kHz) and high open-loop gain (125 dB) via precision trimming of input offset voltage (±0.21 mV typ) and drift (±0.25 μV/°C), supporting DC-coupled audio paths and precision sensor interfaces without external nulling circuitry.
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 systems and dual-supply ±2.5 V/±5 V audio rails without level-shifting. |
| Input Voltage Noise | 4.4 nV/√Hz at 100 kHz - enables high-SNR preamplification of low-level microphone or piezoelectric sensor signals. |
| Output Swing | ±2.4 V at ±2.5 V supply - delivers >96% rail-to-rail dynamic range, maximizing headroom in battery-constrained audio stages. |
| Gain-Bandwidth Product | 10.6 MHz - supports stable unity-gain buffering and closed-loop gains up to G = 100 at audio frequencies with margin. |
| Common-Mode Rejection | 90 dB typ - rejects power-supply ripple and ground bounce in mixed-signal PCBs with shared analog/digital grounds. |
| Input Offset Drift | ±0.25 μV/°C - ensures <1 μV total drift over −40°C to +125°C, critical for uncalibrated industrial sensor front-ends. |
| Supply Current | 2.8 mA per amplifier - balances low-noise performance with power efficiency in always-on portable monitoring circuits. |
Pinout & Package
TL971IDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 6.00 mm, compatible with standard surface-mount reflow profiles (MSL Level-1, 260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives low-impedance loads (≥2 kΩ) with ±65 mA sink/source capability and rail-to-rail swing. |
| 2 | IN− | Inverting input - accepts feedback networks; high impedance (>1012 Ω) minimizes loading on preceding stages. |
| 3 | IN+ | Non-inverting input - connects to signal source; common-mode range extends to both supply rails (VCC− to VCC+). |
| 4 | VCC− | Negative supply - ties to ground in single-supply mode or negative rail in dual-supply configurations. |
| 5 | VCC+ | Positive supply - requires 0.1 μF ceramic bypass capacitor placed adjacent to pin for PSRR optimization. |
| 6–8 | NC | No internal connection - left unconnected; no routing or thermal relief required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ±2.4 V at ±2.5 V supply, preserving >95% of available dynamic range in 3.3 V or ±2.5 V audio systems. |
| Low input voltage noise | 4.4 nV/√Hz enables clean amplification of microvolt-level signals from condenser mics or strain gauges without added filtering. |
| Wide supply range | Operates from 2.7 V to 12 V, allowing direct integration into Li-ion (3.0–4.2 V), USB-powered (5 V), and industrial (±5 V) designs. |
| High CMRR and PSRR | 90 dB CMRR and 70 dB PSRR suppress interference from noisy digital supplies and ground loops in mixed-signal PCBs. |
| Thermal stability | ±0.25 μV/°C offset drift ensures consistent DC accuracy across automotive and industrial temperature ranges without recalibration. |
Applications
| Professional Audio Preamplifiers | Portable Music Player Line-Out Stages |
|---|---|
Use Scenario: Amplifying low-output electret microphone signals before ADC sampling in studio-grade audio interfaces. IC Role / Device Role / Timing Role: Low-noise, DC-coupled preamplifier with gain of 20–40 dB and bandwidth extending to 20 kHz. Use Value: 4.4 nV/√Hz noise floor preserves SNR >110 dB(A) in 24-bit audio chains; rail-to-rail output drives ADC reference voltages directly. |
Use Scenario: Driving 32 Ω headphones from a 3.3 V SoC DAC output in compact Bluetooth speakers. IC Role / Device Role / Timing Role: Unity-gain buffer with low output impedance (<1 Ω) and fast settling to handle transient bass peaks. Use Value: ±65 mA output current delivers >100 mW into 32 Ω loads; 10.6 MHz GBW ensures flat frequency response to 20 kHz with <0.01% THD. |
| Industrial Sensor Signal Conditioning | Medical ECG Front-End Amplifiers |
Use Scenario: Amplifying millivolt-level bridge outputs from load cells or pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with programmable gain (G = 10–100) and DC-coupled output. Use Value: ±0.21 mV input offset and ±0.25 μV/°C drift eliminate need for auto-zero circuitry; 90 dB CMRR rejects motor-drive common-mode noise. |
Use Scenario: First-stage amplification of 0.5–2 mV cardiac signals in portable ECG monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: High-input-impedance (≥1012 Ω), low-noise gain block operating from 3.0 V supply with >100 dB CMRR. Use Value: 2.8 mA supply current extends battery life >72 hours; rail-to-rail output interfaces directly with 12-bit SAR ADCs without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1671IDR | Lower noise (1.2 nV/√Hz), higher GBW (10 MHz), but only specified down to 4.5 V supply. | Preferred for high-end audio where supply ≥5 V is guaranteed; unsuitable for 3.3 V or battery-depleted operation. | Select OPA1671IDR when ultra-low noise dominates and supply voltage remains stable above 4.5 V. |
| LMV791MMX/NOPB | Higher input bias current (1 pA vs 0.01 nA), lower GBW (17 MHz), but rail-to-rail input/output and 2.7 V min supply. | Better for high-impedance pH or ion-selective electrode sensors requiring rail-to-rail input; less optimal for low-noise audio. | Select LMV791MMX/NOPB when rail-to-rail input is mandatory and noise <10 nV/√Hz is acceptable. |
Compared with TL971IDR, OPA1671IDR offers superior noise performance but sacrifices low-voltage operability, while LMV791MMX/NOPB adds rail-to-rail input at the cost of higher noise and reduced DC precision-making TL971IDR the balanced choice for 2.7–12 V audio and sensor applications demanding both low noise and wide supply flexibility.
Availability
TL971IDR is available at Aetrix Electronics and suitable for professional audio equipment, portable medical devices, and industrial sensor transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL971IDR 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, specializing in analog ICs, embedded processors, and educational technology solutions.
The TL97x family was designed specifically for low-noise, rail-to-rail output signal conditioning in portable and battery-powered instrumentation, targeting audio preamplifiers, sensor interfaces, and precision analog front-ends where dynamic range and power efficiency are co-optimized.
FAQ
What is the maximum supply voltage for TL971IDR?
The absolute maximum supply voltage for TL971IDR is 15 V, but the recommended operating range is 2.7 V to 12 V. Exceeding 12 V may degrade long-term reliability and is not characterized for performance parameters such as noise, offset, or distortion. The device is fully specified at ±2.5 V, ±5 V, and 3.3 V/5 V single-supply configurations, making TL971IDR suitable for both battery-powered and line-powered systems without derating.
Does TL971IDR support rail-to-rail input?
No, TL971IDR features rail-to-rail *output* only. Its input common-mode voltage range extends from VCC− + 1.15 V to VCC+ − 1.15 V under recommended conditions, meaning it does not accept signals within ~1.15 V of either rail. For true rail-to-rail input capability, TI recommends alternatives like the OPA1671IDR or LMV791MMX/NOPB - TL971IDR is optimized for output swing and low-noise performance in applications where input range is less constrained.
What is the thermal resistance (θJA) of TL971IDR in SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for TL971IDR in the SOIC-8 (D) package is 97 °C/W, measured per JESD 51-7. This value assumes standard JEDEC 2S2P test board conditions with 1 in² copper pad. In typical PCB layouts with 2–4 cm² internal ground planes, actual θJA may improve to 65–75 °C/W, allowing continuous operation at full 2.8 mA supply current up to +105°C ambient without thermal shutdown.
Can TL971IDR drive capacitive loads directly?
Yes, TL971IDR maintains stability with capacitive loads up to 250 pF when configured as a unity-gain buffer, as confirmed by phase margin measurements (≥60°). For loads >100 pF, TI recommends adding a small series resistor (RISO = 10–50 Ω) between the output pin and the load to isolate the amplifier's output impedance from the capacitance - this preserves transient response and prevents peaking. TL971IDR's robust capacitive drive capability simplifies filter design in anti-aliasing and reconstruction stages.
Is TL971IDR RoHS compliant and lead-free?
Yes, TL971IDR is RoHS compliant and features a lead-free NIPDAU (nickel-palladium-gold) terminal finish. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 with unlimited floor life at ≤30°C/60% RH and is rated for peak reflow temperatures up to 260°C. The part marking "Z971" and packaging code "DR" confirm full compliance with EU RoHS Directive 2011/65/EU and China RoHS II, making TL971IDR suitable for export-controlled and environmentally regulated electronics manufacturing.
TL971IDR 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:
- 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
TL971IDR FAQ
1.How can I place an order for TL971IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL971IDR 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 TL971IDR reliable?
The price and inventory of TL971IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL971IDR is usually 5 days.
3.What payment methods are accepted for TL971IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL971IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL971IDR?
TL971IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL971IDR 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 TL971IDR?
For technical support, including TL971IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL971IDR requirements.
6.How does Aetrix verify that TL971IDR is sourced from the original manufacturer or authorized distributors?
All TL971IDR 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 TL971IDR meets industry standards.
7.What is the process for return or replacement of TL971IDR?
All TL971IDR units undergo pre-shipment inspection (PSI). If there is an issue with TL971IDR, 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 TL971IDR part is unused and in its original packaging.
Return procedure for TL971IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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