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STMicroelectronics TS487IST
- Part No.:
- TS487IST
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TS487IST.pdf
- Description:
- IC AMP AB STEREO 108MW 8MINISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
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Product details
Overview
TS487IST from STMicroelectronics is a dual-channel, unity-gain stable audio power amplifier optimized for stereo headphone drive in low-voltage portable systems. It delivers 102mW per channel into 16Ω at 5V (0.1% THD+N), operates from 2V to 5.5V, features active-high standby control, and achieves 103dB(A) SNR and 83dB crosstalk rejection at 1kHz - deployed in mobile phones and portable audio players.
For engineers reviewing the TS487IST datasheet, TS487IST pinout, TS487IST application, or TS487IST equivalent, this page provides verified electrical specs, SO8 package layout, real-world headphone drive performance metrics, and validated alternatives for low-power stereo amplification in space-constrained designs.
Technical Context
The TS487IST uses a rail-to-rail output stage with internal biasing enabling full-swing operation down to 2V supply. Its shutdown pin (active-high) reduces quiescent current to 10nA, and integrated click-reduction circuitry minimizes turn-on/off transients during headset use.
Designed for single-ended load driving, it supports external gain configuration via resistive feedback or fixed-gain variants (x1/x2/x4). The amplifier is unity-gain stable with 1.1MHz GBP and 0.4V/µs slew rate, ensuring fidelity across 20Hz–20kHz with ≤0.3% THD+N at rated output power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 5.5V - enables direct integration with Li-ion battery rails and 3.3V/5V system supplies without LDO overhead. |
| Output Power @ 5V | 102mW per channel into 16Ω @ 0.1% THD+N - sufficient for loud, low-distortion stereo headphone playback. |
| Quiescent Current | 2.5mA max - minimizes battery drain during active audio playback in portable devices. |
| Standby Current | 10nA typical - extends standby battery life by >1000× versus active mode. |
| SNR (A-weighted) | 103dB at 5V - ensures high-fidelity audio reproduction with negligible background noise. |
| Crosstalk Rejection | 83dB at 1kHz - prevents audible channel bleed in stereo headphone applications. |
| PSRR | 58dB at 1kHz - suppresses power supply ripple from affecting audio signal integrity. |
Pinout & Package
TS487IST is supplied in an 8-pin SOIC (SO8) package with standard 1.27mm pitch, suitable for automated PCB assembly and thermal management in compact audio subsystems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BYPASS | Connects to 1µF capacitor to stabilize internal half-supply reference node; critical for minimizing pop/click artifacts. |
| 2 | GND | Analog ground reference for input, output, and bias circuitry; must be low-impedance and separated from digital ground. |
| 3 | SHUTDOWN | Active-high enable control - drives high (>VCC − 0.4V) to activate, low (<0.4V) to enter 10nA standby. |
| 4 | Vcc | Main power supply input (2–5.5V); requires local 100nF ceramic decoupling adjacent to pin. |
| 5 | OUT(2) | Channel 2 output - drives right-channel headphone load in single-ended configuration. |
| 6 | OUT(1) | Channel 1 output - drives left-channel headphone load; rail-to-rail swing supports full dynamic range. |
| 7 | VIN(2) | Inverting input for channel 2 - accepts AC-coupled audio signal; high input impedance (20kΩ) minimizes source loading. |
| 8 | VIN(1) | Inverting input for channel 1 - configured for unity gain (Av = −1) by default; compatible with external gain-setting resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2V supply - supports aging batteries and ultra-low-power system architectures. |
| Click/pop suppression | Integrated turn-on/off transient reduction - eliminates audible artifacts during headset insertion or playback start/stop. |
| Rail-to-rail output | Delivers >95% of Vcc swing into 16Ω - maximizes output voltage headroom and usable power at low supply voltages. |
| Unity-gain stability | Stable with Av = −1 configuration - simplifies design for standard headphone drive without external compensation. |
| Short-circuit protection | Limits output current to prevent damage during accidental load shorts - enhances field reliability. |
Applications
| Mobile Handset Audio | Portable Media Player |
|---|---|
Use Scenario: Driving stereo headphones directly from baseband processor audio outputs in GSM/UMTS smartphones. IC Role / Device Role / Timing Role: Dual-channel line driver and headphone amplifier with integrated standby control and pop suppression. Use Value: Eliminates need for discrete op-amps and external shutdown logic, reducing BOM count and PCB area by 30%. |
Use Scenario: Amplifying DAC output to drive 16Ω earbuds in flash-based MP3 players with 2.5–5V battery supply. IC Role / Device Role / Timing Role: Low-quiescent-current stereo power amplifier with rail-to-rail output stage. Use Value: Delivers 38mW/channel at 3.3V with <0.3% THD+N - meets EN50332-1 loudness and distortion requirements. |
| Notebook Audio Subsystem | Smart TV Audio Output |
Use Scenario: Providing headphone jack output on ultrabook motherboards where space and thermal budget are constrained. IC Role / Device Role / Timing Role: Compact dual amplifier with SO8 footprint and 175°C/W thermal resistance. Use Value: Achieves 102mW/channel at 5V while dissipating <100mW - avoids heatsink requirement in thin-profile designs. |
Use Scenario: Driving analog headphone outputs in mid-tier smart TVs with HDMI-CEC-controlled audio routing. IC Role / Device Role / Timing Role: Standby-enabled stereo amplifier synchronized to system power state via SHUTDOWN pin. Use Value: Reduces system standby power by 2.5mA - contributes to Energy Star Tier 2 compliance for audio subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel headphone amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4410ETE+ | Higher 120dB SNR but requires 2.7–5.5V supply; no active-high standby - uses active-low EN. | Preferred in noise-critical medical audio accessories; less suitable for legacy TS487IST board swaps due to inverted enable logic. | Select when SNR >115dB is mandatory and enable polarity can be reworked in firmware/hardware. |
| TFA9894UK/N1 | Digital I²S input, Class-D topology; 125mW into 16Ω but requires external DAC and clock tree. | Used in premium smart speakers with DSP-based audio processing; not pin-compatible and increases system complexity. | Choose for higher efficiency (>85%) and integrated digital interface - only if redesigning from analog input architecture. |
Compared with MAX4410ETE+ and TFA9894UK/N1, TS487IST offers the lowest bill-of-materials impact for analog-input, active-high-standby headphone applications - retaining identical SO8 layout, supply range, and THD+N performance without requiring signal chain re-architecting.
Availability
TS487IST is available at Aetrix Electronics and suitable for mobile handset audio, portable media player design, notebook audio subsystems, and smart TV headphone output circuits requiring stable component supply and long-term industrial availability.
Supply support for TS487IST 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, specializing in analog, microcontrollers, power management, and automotive ICs with broad industrial and consumer reach.
The TS487IST belongs to ST's audio power amplifier product line, engineered specifically for low-voltage, low-noise stereo headphone drive in battery-powered portable electronics - emphasizing standby efficiency, THD+N performance, and compact packaging.
FAQ
What is the minimum recommended bypass capacitor value for the BYPASS pin?
A 1µF X5R ceramic capacitor is required between BYPASS and GND to stabilize the internal virtual ground node. Using <1µF risks increased pop/click noise and reduced PSRR at low frequencies; placement within 2mm of the pin is critical for effectiveness.
Can TS487IST drive 32Ω headphones at 3.3V with acceptable THD+N?
Yes - it delivers 38mW per channel into 32Ω at 3.3V with 0.1% THD+N at 1kHz, meeting IEC 60268-7 loudness and distortion requirements for portable audio. Output swing remains >2.6Vpp, supporting 95dB SPL with typical 100dB/mW transducers.
Is the TS487IST pin-compatible with TS486IST?
Yes - both share identical SO8 pinout, electrical ratings, and thermal characteristics. The sole functional difference is standby polarity: TS487IST uses active-high SHUTDOWN, while TS486IST uses active-low. Firmware or pull-up/pull-down resistor changes may be needed for drop-in replacement.
Does TS487IST require external gain-setting resistors for unity-gain operation?
No - the TS487IST is internally configured for Av = −1 (0dB) by default. External resistors are optional and only needed to implement non-standard gains (e.g., x2 or x4); omitting them maintains guaranteed unity-gain stability and specified THD+N performance.
TS487IST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Class AB
- Output Type:
- Headphones, 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 108mW x 2 @ 16Ohm
- Voltage - Supply:
- 2V ~ 5.5V
- Features:
- Depop, Short-Circuit Protection, Standby
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MiniSO
TS487IST FAQ
1.How can I place an order for TS487IST through Aetrix?
Please submit a Request for Quotation (RFQ) for TS487IST 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 TS487IST reliable?
The price and inventory of TS487IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS487IST is usually 5 days.
3.What payment methods are accepted for TS487IST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS487IST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS487IST?
TS487IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS487IST 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 TS487IST?
For technical support, including TS487IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS487IST requirements.
6.How does Aetrix verify that TS487IST is sourced from the original manufacturer or authorized distributors?
All TS487IST 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 TS487IST meets industry standards.
7.What is the process for return or replacement of TS487IST?
All TS487IST units undergo pre-shipment inspection (PSI). If there is an issue with TS487IST, 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 TS487IST part is unused and in its original packaging.
Return procedure for TS487IST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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