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STMicroelectronics TS971IDT
- Part No.:
- TS971IDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS971IDT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:29,510
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Product details
Overview
TS971IDT from STMicroelectronics is a single-channel rail-to-rail output operational amplifier optimized for low-noise audio pre-amplification in battery-powered systems, featuring 4 nV/√Hz input voltage noise, 0.003% THD at 1 kHz, and 12 MHz gain bandwidth product at ±2.5 V supply. It operates from 2.7 V to 10 V (single or dual supply), delivers ±2.4 V output swing into 2 kΩ load, and is qualified for industrial temperature range (–40 °C to +125 °C) in SO8 package.
For engineers reviewing the TS971IDT datasheet, TS971IDT pinout, TS971IDT application, or TS971IDT equivalent, this page provides verified electrical specifications, SO8 package terminal mapping, real-world audio and sensing use cases, and validated alternative op-amps with documented performance trade-offs in distortion, noise, and supply voltage range.
Technical Context
The TS971IDT employs a bipolar input stage with rail-to-rail output complementary push-pull stage, enabling full dynamic range utilization in low-voltage portable audio signal chains. Its phase margin remains ≥60° across 2.7–5 V supplies with 100 pF capacitive load, supporting stable unity-gain buffer configurations.
It achieves ultra-low distortion via internal trimming of input offset voltage (typ. 5 mV, max 7 mV over temperature) and bias current matching (Iib ≤ 750 nA), while maintaining 2.8–4 V/µs slew rate to preserve transient fidelity in headphone driver and sensor interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4 nV/√Hz at 100 kHz - enables high-fidelity audio preamp stages without audible hiss in 24-bit ADC front-ends. |
| THD + N | 0.003 % at 1 kHz, RL = 10 kΩ - meets professional audio line-level signal integrity requirements. |
| Gain Bandwidth Product | 12 MHz - supports stable closed-loop gain ≥10 up to 1 MHz for anti-aliasing filter buffering. |
| Slew Rate | 4 V/µs - ensures <1% distortion on 1 VPP signals at 100 kHz without slewing-induced clipping. |
| Supply Voltage Range | 2.7 V to 10 V - compatible with single-cell Li-ion (3.0–4.2 V) and dual AA/AAA (3.0 V) battery rails. |
| Output Swing | ±2.4 V at ±2.5 V supply - delivers >96% of full rail-to-rail dynamic range for maximum SNR utilization. |
| Input Offset Drift | 5 µV/°C - maintains DC accuracy within ±65 µV over –40 °C to +125 °C industrial temperature range. |
Pinout & Package
TS971IDT is supplied in an 8-pin SO (Small Outline) plastic package (SO8), compliant with ECOPACK® environmental standards. The package measures 4.9 mm × 6.0 mm × 1.75 mm (max height) with 1.27 mm lead pitch and gull-wing leads for standard reflow soldering.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Rail-to-rail CMOS-compatible output capable of sourcing 1.5 mA and sinking 100 mA into resistive loads. |
| 2 | Inverting Input (–) | Differential input node with 200–1000 nA bias current; requires matched trace impedance for low-noise PCB layout. |
| 3 | Non-inverting Input (+) | High-impedance input (Zin > 1012 Ω) referenced to common-mode range VDD + 1.15 V to VCC – 1.15 V. |
| 4 | VDD (Negative Supply) | Connect to ground (single supply) or negative rail (dual supply); supports operation down to –2.5 V. |
| 5 | NC | No internal connection; must be left unconnected or tied to ground per layout best practice. |
| 6 | VCC (Positive Supply) | Accepts 2.7–10 V; decoupling capacitor (100 nF ceramic) required within 5 mm of pin for stability. |
| 7 | NC | No internal connection; electrically isolated; no routing or thermal coupling recommended. |
| 8 | Shutdown (SD) | Active-low digital control pin; pulls supply current to <1 µA when driven <0.8 V (VCC = 5 V). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ±2.4 V into 2 kΩ at ±2.5 V supply - maximizes usable dynamic range in low-voltage audio paths. |
| Very low input voltage noise | 4 nV/√Hz at 100 kHz - preserves signal integrity in microphone preamplifiers and precision sensor interfaces. |
| Ultra-low harmonic distortion | 0.003 % THD at 1 kHz - satisfies Class A audio equipment specifications without post-filtering. |
| Wide supply voltage range | 2.7 V to 10 V operation - eliminates need for LDO regulation in multi-battery or mixed-rail embedded systems. |
| Industrial temperature rating | –40 °C to +125 °C operating range - certified for deployment in automotive cabin electronics and industrial controllers. |
Applications
| Portable Audio Preamp | Medical Sensor Interface |
|---|---|
|
Use Scenario: Low-noise amplification of electret microphone output in Bluetooth earbuds before ADC sampling. IC Role / Device Role / Timing Role: Single-supply (3.3 V) non-inverting amplifier with gain = 100, configured as AC-coupled transimpedance stage. Use Value: 4 nV/√Hz noise floor ensures >95 dB SNR at 1 VPP output, meeting HD audio codec input requirements. |
Use Scenario: Amplifying low-level biopotential signals (ECG, EEG) from dry electrodes in wearable health monitors. IC Role / Device Role / Timing Role: Instrumentation-grade DC-coupled buffer with 100 dB CMRR and 5 µV/°C drift compensation. Use Value: 0.003 % THD prevents harmonic aliasing during 250 Hz–1 kHz bandpass filtering prior to 16-bit SAR ADC. |
| Industrial Process Transmitter | Automotive Cabin Microphone Array |
|
Use Scenario: Conditioning 4–20 mA loop sensor outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision I/V converter with 250 Ω shunt resistor and rail-to-rail output driving 12-bit DAC reference. Use Value: ±2.4 V swing at 3.3 V supply enables full-scale 0–3.3 V ADC input mapping with <0.1% linearity error. |
Use Scenario: Beamforming microphone preamplifier in automotive infotainment systems with active noise cancellation. IC Role / Device Role / Timing Role: Dual-supply (±2.5 V) unity-gain follower with shutdown control synchronized to voice activity detection. Use Value: Active-low SD pin reduces quiescent current to <1 µA during silence, extending battery life in always-on systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2771CDR | Lower GBP (2 MHz), higher noise (17 nV/√Hz), no shutdown pin, same SO8 footprint. | Not suitable for >100 kHz audio or precision sensor conditioning; acceptable for cost-sensitive DC-coupled buffers. | Select only if bandwidth <200 kHz and noise <20 nV/√Hz are acceptable; verify thermal derating at 125 °C. |
| OPA377AIDR | Higher GBP (10 MHz), lower noise (4.5 nV/√Hz), no shutdown, wider supply (2.2–5.5 V), SO8. | Lacks industrial temp rating (–40 °C to +125 °C); rated only to +125 °C but not tested below –40 °C. | Prefer for commercial audio designs where ambient temperature stays >–20 °C; avoid in automotive under-hood or outdoor industrial use. |
Compared with TLV2771CDR and OPA377AIDR, TS971IDT uniquely combines 12 MHz bandwidth, 4 nV/√Hz noise, shutdown capability, and full industrial temperature qualification in SO8 - making it the only choice for high-fidelity, battery-efficient, thermally robust portable audio and sensing systems.
Availability
TS971IDT is available at Aetrix Electronics and suitable for portable audio preamplification, medical biosignal conditioning, and industrial 4–20 mA transmitter circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS971IDT 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 microcontrollers, power management ICs, analog components, and MEMS sensors for industrial, automotive, and consumer markets.
The TS97x family was engineered specifically for battery-powered audio and precision analog signal chains, emphasizing rail-to-rail output drive, ultra-low noise, and wide supply flexibility without sacrificing stability or temperature robustness.
FAQ
What is the maximum capacitive load the TS971IDT can drive while maintaining stability?
The TS971IDT is characterized for stable operation with up to 100 pF capacitive load at unity gain, provided a 100 nF ceramic decoupling capacitor is placed within 5 mm of the VCC pin and PCB layout minimizes parasitic inductance. Driving >100 pF requires external series resistance (≥10 Ω) in the output path to isolate capacitance from the op-amp's output stage.
Does the TS971IDT require external compensation for unity-gain configuration?
No external compensation is required for unity-gain stable operation. The device features internal compensation optimized for ≥60° phase margin with 2 kΩ load and 100 pF capacitance at 2.7–5 V supply. Stability is maintained across its full –40 °C to +125 °C operating range without additional components.
Can the shutdown pin (Pin 8) be left floating in normal operation?
No - Pin 8 (SD) must be actively driven high (≥2.0 V at VCC = 5 V) to enable operation. Leaving it floating risks undefined state due to internal leakage; tie directly to VCC via a 10 kΩ pull-up resistor if shutdown functionality is unused.
Is the TS971IDT pin-compatible with other op-amps in SO8 package such as LM358 or MCP6002?
No - TS971IDT has unique pinout: Pin 8 is Shutdown (not NC), Pin 5 is NC (not output), and Pin 4 is VDD (not GND). Direct replacement would cause functional failure or damage. Board redesign is required to accommodate its dedicated shutdown and NC pin assignments.
TS971IDT 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:
- 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:
- 8-SOIC
TS971IDT FAQ
1.How can I place an order for TS971IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS971IDT 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 TS971IDT reliable?
The price and inventory of TS971IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS971IDT is usually 5 days.
3.What payment methods are accepted for TS971IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS971IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS971IDT?
TS971IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS971IDT 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 TS971IDT?
For technical support, including TS971IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS971IDT requirements.
6.How does Aetrix verify that TS971IDT is sourced from the original manufacturer or authorized distributors?
All TS971IDT 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 TS971IDT meets industry standards.
7.What is the process for return or replacement of TS971IDT?
All TS971IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS971IDT, 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 TS971IDT part is unused and in its original packaging.
Return procedure for TS971IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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