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STMicroelectronics TS971ILT
- Part No.:
- TS971ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS971ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:20,218
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Product details
Overview
TS971ILT from STMicroelectronics is a single-channel rail-to-rail output operational amplifier optimized for low-noise audio pre-amplification in battery-powered portable equipment. It delivers 4 nV/√Hz input voltage noise, 0.003% THD at 1 kHz, 12 MHz gain bandwidth, 4 V/µs slew rate, and operates from 2.7 V to 10 V supply. Used in CD players, cell phone audio front-ends, and handheld instrumentation.
For engineers reviewing the TS971ILT datasheet, TS971ILT pinout, TS971ILT application, or TS971ILT equivalent, key selection criteria include its rail-to-rail output swing (±2.4 V at ±2.5 V supplies), ultra-low distortion for signal fidelity, thermal resistance (250 °C/W in SOT23-5), ESD robustness (2 kV HBM), and compatibility with space-constrained PCB layouts using the 2.8 × 2.9 mm SOT23-5 package.
Technical Context
The TS971ILT employs a bipolar input stage with rail-to-rail output stage, enabling full dynamic range utilization in single-supply or split-supply configurations. Its phase margin remains ≥60° across load currents up to 10 mA and supply voltages from 2.7 V to 10 V, ensuring stable unity-gain operation with capacitive loads up to 100 pF.
It features internal compensation for fixed 12 MHz GBP and achieves 250 fA/√Hz input current noise at 1 kHz. Common-mode input range extends from VDD + 1.15 V to VCC − 1.15 V, supporting mid-supply biasing in single-ended sensor interfaces without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4 nV/√Hz at 100 kHz - enables high-fidelity audio pre-amplification without audible hiss |
| THD + N | 0.003 % at 1 kHz, RL = 10 kΩ - preserves harmonic integrity in line-level and headphone drive stages |
| Gain Bandwidth Product | 12 MHz - supports stable closed-loop gain ≥10 at audio frequencies up to 1 MHz |
| Slew Rate | 4 V/µs - prevents slew-induced distortion on fast transients (e.g., drum hits, percussive signals) |
| Supply Voltage Range | 2.7 V to 10 V - compatible with single-cell Li-ion (3.0–4.2 V), dual AA (3.0 V), and 5 V USB-powered systems |
| Output Swing | ±2.4 V at ±2.5 V supplies - delivers >96% of full rail-to-rail dynamic range for maximum SNR |
| Input Offset Drift | 5 µV/°C - minimizes DC error drift over industrial temperature range (−40 °C to +125 °C) |
Pinout & Package
TS971ILT is supplied in the SOT23-5 surface-mount package (2.8 × 2.9 mm footprint, 1.3 mm height), optimized for compact portable designs. Thermal resistance is 250 °C/W (junction-to-ambient), requiring minimal copper area for thermal relief in low-power applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Capable of sourcing 1.5 mA / sinking 100 mA; rail-to-rail swing supports direct connection to ADC inputs or headphone drivers |
| 2 (−IN) | Inverting input | High-impedance node (Iib ≤ 750 nA); requires matched trace impedance for noise rejection in differential configurations |
| 3 (+IN) | Non-inverting input | Common-mode range extends to within 1.15 V of rails - enables direct sensor interface without external bias resistors |
| 4 (V−) | Negative supply | Accepts ground (0 V) or negative rail (e.g., −2.5 V); must be decoupled with ≥100 nF ceramic capacitor near pin |
| 5 (V+) | Positive supply | Supports 2.7–10 V; internal ESD protection (2 kV HBM) allows direct handling in assembly without special precautions |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers ±2.4 V swing at ±2.5 V supplies - maximizes usable dynamic range in low-voltage audio chains |
| Low-noise architecture | 4 nV/√Hz input voltage noise - reduces background noise floor in microphone preamps and sensor signal conditioning |
| Ultra-low distortion | 0.003 % THD at 1 kHz - maintains spectral purity critical for professional audio and measurement-grade instrumentation |
| Stable under capacitive load | 60° phase margin with 100 pF load - eliminates need for isolation resistors when driving long traces or ADC input capacitance |
| Wide supply range | Operates from 2.7 V to 10 V - supports both single-supply portable devices and dual-supply test equipment without redesign |
Applications
| Portable Audio Front-End | Handheld Instrumentation Signal Chain |
|---|---|
Use Scenario: Amplifying electret microphone output in Bluetooth headsets before ADC sampling. IC Role / Device Role / Timing Role: Low-noise pre-amplifier with DC-coupled gain stage and rail-to-rail output driving 16-bit SAR ADC. Use Value: 4 nV/√Hz noise ensures >90 dB SNR; 0.003 % THD preserves voice intelligibility and music fidelity. |
Use Scenario: Conditioning thermocouple or strain gauge signals in battery-powered multimeters. IC Role / Device Role / Timing Role: Precision instrumentation amplifier input stage with adjustable gain and offset trimming. Use Value: 5 µV/°C offset drift minimizes calibration drift over operating temperature; rail-to-rail output matches ADC reference span. |
| Cell Phone Receiver Audio Path | PDAs and Portable Media Players |
Use Scenario: Driving mono earpiece or piezo buzzer in GSM/UMTS handsets with tight power budget. IC Role / Device Role / Timing Role: Output buffer and level shifter between baseband processor DAC and acoustic transducer. Use Value: 4 V/µs slew rate handles transient-rich ringtone waveforms without clipping; 2.7 V min supply enables operation down to depleted battery voltage. |
Use Scenario: Line-out amplification in MP3 players feeding 32 Ω headphones. IC Role / Device Role / Timing Role: Single-supply headphone driver with shutdown control and pop/click suppression. Use Value: ±2.4 V output swing into 32 Ω delivers >15 mW per channel; low 2.8 mA supply current extends playback time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2271CDR | Higher input offset (2 mV typ), lower GBP (2.2 MHz), higher noise (10 nV/√Hz) | Lower bandwidth limits use in wideband audio; higher noise degrades SNR in mic preamps | Select only if cost sensitivity outweighs noise and speed requirements |
| OPA333AIDBVR | Zero-drift architecture, 0.1 µV/°C drift, but lower slew rate (1.6 V/µs), higher quiescent current (17 µA) | Better DC precision for sensor offsets, but insufficient slew for transient-rich audio signals | Prefer for DC-coupled sensor bridges; avoid where audio fidelity or fast settling is required |
Compared with TLC2271CDR and OPA333AIDBVR, TS971ILT uniquely balances ultra-low noise (4 nV/√Hz), high slew rate (4 V/µs), and rail-to-rail output in a 5-pin SOT23 package - making it optimal for portable audio where both AC fidelity and DC efficiency matter.
Availability
TS971ILT is available at Aetrix Electronics and suitable for portable audio front-ends, handheld instrumentation signal chains, and cell phone receiver audio paths requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for TS971ILT 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The TS97x family was developed specifically for battery-powered portable audio and sensing applications demanding low noise, rail-to-rail output, and wide supply flexibility - targeting design-in longevity in space- and power-constrained systems.
FAQ
What is the maximum capacitive load the TS971ILT can drive while maintaining stability?
The TS971ILT maintains ≥60° phase margin with up to 100 pF capacitive load at unity gain, as verified in Figure 10 of the datasheet. For loads exceeding 100 pF, a series isolation resistor (≥10 Ω) is recommended between the output and capacitance to preserve stability without compromising audio bandwidth.
Does the TS971ILT require external compensation components?
No - the TS971ILT is internally compensated for unity-gain stability across its full operating voltage range (2.7 V to 10 V) and temperature range (−40 °C to +125 °C). No external capacitors or resistors are needed for basic operation, simplifying layout and reducing BOM count in portable designs.
Can the TS971ILT operate from a single 3.3 V supply?
Yes - the TS971ILT functions reliably from a single 3.3 V supply, delivering rail-to-rail output swing (0 V to 3.3 V) and maintaining 12 MHz GBP and 4 V/µs slew rate. Input common-mode range extends from 1.15 V to 2.15 V, allowing direct interface with 3.3 V logic or sensors referenced to mid-supply.
How does the SOT23-5 package affect thermal performance in continuous operation?
With RthJA = 250 °C/W, the TS971ILT in SOT23-5 dissipates heat primarily through the leads and top surface. At 2.8 mA supply current and no output load, junction temperature rise is <1°C above ambient - well within safe limits. For sustained 10 mA output current, PCB copper pour under the exposed pad (if used) is recommended to reduce thermal resistance.
TS971ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS971ILT FAQ
1.How can I place an order for TS971ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS971ILT 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 TS971ILT reliable?
The price and inventory of TS971ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS971ILT is usually 5 days.
3.What payment methods are accepted for TS971ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS971ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS971ILT?
TS971ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS971ILT 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 TS971ILT?
For technical support, including TS971ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS971ILT requirements.
6.How does Aetrix verify that TS971ILT is sourced from the original manufacturer or authorized distributors?
All TS971ILT 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 TS971ILT meets industry standards.
7.What is the process for return or replacement of TS971ILT?
All TS971ILT units undergo pre-shipment inspection (PSI). If there is an issue with TS971ILT, 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 TS971ILT part is unused and in its original packaging.
Return procedure for TS971ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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