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STMicroelectronics TS487IQT
- Part No.:
- TS487IQT
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
TS487IQT.pdf
- Description:
- IC AMP CLASS AB STER 108MW 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,775
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Product details
Overview
TS487IQT 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 high-end TV audio stages.
For engineers reviewing the TS487IQT datasheet, TS487IQT pinout, TS487IQT application, or TS487IQT equivalent, key selection criteria include its 2.5mA max supply current, 10nA standby current, DFN 3×3mm package compatibility, and fixed-gain variants (x1/x2/x4) supporting direct integration into space-constrained audio subsystems without external gain-setting resistors.
Technical Context
The TS487IQT implements a dual rail-to-rail output stage with internal biasing enabling full-swing operation down to 2V supply. Its shutdown pin asserts active-high standby mode, reducing quiescent current to 10nA while maintaining fast wake-up response for battery-sensitive applications.
Designed for single-ended headset loads (16Ω or 32Ω), it integrates on-chip bypass filtering (BYPASS pin), click/pop suppression circuitry, short-circuit current limiting (115mA peak), and PSRR of 58dB at 1kHz - all verified across −40°C to +85°C operating range with no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 5.5V - supports Li-ion, Li-poly, and dual-cell alkaline power rails without LDO pre-regulation. |
| Output Power | 102mW @5V into 16Ω (0.1% THD+N) - sufficient for loud, low-distortion stereo headphone playback. |
| Supply Current | 2.5mA max (active), 10nA typ. (standby) - enables >100-hour battery life in always-on audio monitoring modes. |
| Signal-to-Noise Ratio | 103dB(A) @5V - meets high-fidelity audio requirements with negligible background noise floor. |
| Crosstalk Rejection | 83dB @1kHz - ensures channel separation critical for stereo imaging in portable media players. |
| PSRR | 58dB @1kHz (inputs grounded) - rejects ripple from noisy shared system supplies without additional filtering. |
| Gain Options | Fixed x1/0dB, x2/6dB, or x4/12dB - eliminates external resistor networks and layout sensitivity in production designs. |
Pinout & Package
TS487IQT is housed in an 8-pin DFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad (EP) for enhanced power dissipation. Pin 1 is marked by a dot; top-view pin numbering follows standard DFN convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BYPASS | Internal reference decoupling node | Connects to 1µF capacitor to ground to stabilize half-supply bias and suppress low-frequency noise. |
| 2 - GND | Analog/digital ground reference | Primary return path for output stage and internal bias circuits; must be tied to low-impedance PCB ground plane. |
| 3 - SHUTDOWN | Active-high standby enable input | Drives internal bias disable when pulled ≥VCC; logic-low (<0.4V) disables amplifier and reduces ICC to 10nA. |
| 4 - Vcc | Main power supply input | Accepts 2–5.5V; requires local 100nF ceramic decoupling capacitor placed within 2mm of pin. |
| 5 - OUT(2) | Channel 2 output driver | Rail-to-rail output capable of sourcing/sinking 115mA; drives one side of stereo headset load directly. |
| 6 - OUT(1) | Channel 1 output driver | Identical to OUT(2); paired with OUT(2) to deliver true differential-capable stereo output. |
| 7 - VIN(2) | Inverting input for channel 2 | Accepts AC-coupled audio signal; internal 20kΩ input resistance sets gain in fixed-gain versions. |
| 8 - VIN(1) | Inverting input for channel 1 | Matches VIN(2); both inputs are internally biased at VCC/2 for single-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Operates reliably with closed-loop gain = 1 (0dB) without external compensation components. |
| On/off click reduction | Integrated soft-start and output discharge circuitry minimizes audible transients during power-up/down. |
| Short-circuit protection | Limits output current to ≤115mA continuously - prevents thermal runaway during accidental load shorts. |
| Low-voltage operation | Delivers usable output power (12mW/channel) even at 2V supply - extends runtime in deeply discharged batteries. |
| High PSRR & SNR | 58dB PSRR and 103dB(A) SNR ensure clean audio output in electrically noisy handheld environments. |
Applications
| Mobile Phone Audio Subsystem | Portable Media Player Output Stage |
|---|---|
Use Scenario: Driving stereo headphones from baseband processor audio DAC outputs in slim smartphones. IC Role / Device Role / Timing Role: Final-stage dual-channel line driver with integrated DC-blocking and gain setting. Use Value: Eliminates need for discrete op-amps and passive RC networks, reducing BOM count by 7 components per channel. |
Use Scenario: Amplifying decoded MP3/AAC audio signals for 16Ω earbud loads in battery-powered players. IC Role / Device Role / Timing Role: Low-noise, low-power headphone amplifier with fast standby wake-up for playlist navigation. Use Value: Achieves >15-hour playback at 85dB SPL using only 2.5mA active current and 10nA standby draw. |
| Smart TV Audio Auxiliary Output | USB-C Audio Dongle Interface |
Use Scenario: Providing dedicated headphone jack output alongside HDMI/SPDIF in compact smart TVs. IC Role / Device Role / Timing Role: Standalone stereo amplifier isolating main speaker amplifier from headphone path. Use Value: Delivers 102mW/channel into 16Ω at 5V - sufficient for high-SPL listening without external boost converters. |
Use Scenario: Converting USB-C digital audio (via integrated DAC) to analog line-level output for wired headsets. IC Role / Device Role / Timing Role: Post-DAC analog buffer and gain stage with ESD-hardened I/O pins. Use Value: Withstands 1.5kV HBM ESD on all pins (except SHUTDOWN: 1kV), meeting IEC 61000-4-2 Level 4 robustness. |
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 120mW output @5V but requires external gain resistors; no fixed-gain variants. | Used where programmable gain is needed; lacks integrated click/pop suppression. | Select when design flexibility outweighs BOM simplification and transient noise immunity. |
| TFA9894UK/N1 | Digital input (I²S), Class-D efficiency; 105mW @5V into 16Ω, but higher EMI risk. | Targeted at SoC-integrated audio subsystems with digital audio interfaces. | Prefer when system uses I²S output and thermal constraints favor switching topology over linear. |
Compared with MAX4410ETE+ and TFA9894UK/N1, TS487IQT offers lowest component count for analog-input portable audio, best-in-class standby current (10nA), and guaranteed click-free operation - making it optimal for cost-sensitive, battery-limited consumer devices requiring analog simplicity and acoustic reliability.
Availability
TS487IQT is available at Aetrix Electronics and suitable for mobile phone audio subsystems, portable media player output stages, smart TV auxiliary outputs, and USB-C audio dongle interfaces requiring stable component supply across extended product lifecycles.
Supply support for TS487IQT 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 specializing in analog, power, and microcontroller solutions for automotive, industrial, and consumer markets.
The TS487IQT belongs to ST's audio power amplifier product line, engineered specifically for ultra-low-power, high-SNR stereo headphone drive in space- and battery-constrained portable electronics.
FAQ
What is the thermal performance of TS487IQT in DFN8 package?
The TS487IQT in DFN8 (3×3mm) has RthJA = 41°C/W when mounted on a 4-layer PCB. At 102mW per channel (204mW total) and 25°C ambient, junction temperature rise is ~8.4°C - well below the 150°C maximum, enabling reliable operation without heatsinking in typical handheld enclosures.
Can TS487IQT drive 32Ω loads effectively?
Yes - at 5V supply, TS487IQT delivers 64mW per channel into 32Ω at 0.1% THD+N (1kHz), with 103dB SNR and 80dB crosstalk. Output swing reaches ±2.25V, supporting 85dB SPL into common high-impedance earbuds without clipping.
How does the BYPASS pin function, and what capacitor value is required?
The BYPASS pin connects to an internal voltage divider generating VCC/2 reference. A 1µF X5R ceramic capacitor must be placed between BYPASS and GND to filter noise and stabilize bias - values <0.47µF cause increased low-frequency distortion; >2.2µF delay startup time without benefit.
Is TS487IQT compatible with single-ended or differential input sources?
TS487IQT accepts single-ended AC-coupled inputs on VIN(1)/VIN(2), with internal bias at VCC/2. It does not support true differential input; however, two channels can be driven with inverted signals externally to synthesize pseudo-differential output for improved common-mode noise rejection in noisy environments.
TS487IQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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-DFN (3x3)
TS487IQT FAQ
1.How can I place an order for TS487IQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS487IQT 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 TS487IQT reliable?
The price and inventory of TS487IQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS487IQT is usually 5 days.
3.What payment methods are accepted for TS487IQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS487IQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS487IQT?
TS487IQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS487IQT 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 TS487IQT?
For technical support, including TS487IQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS487IQT requirements.
6.How does Aetrix verify that TS487IQT is sourced from the original manufacturer or authorized distributors?
All TS487IQT 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 TS487IQT meets industry standards.
7.What is the process for return or replacement of TS487IQT?
All TS487IQT units undergo pre-shipment inspection (PSI). If there is an issue with TS487IQT, 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 TS487IQT part is unused and in its original packaging.
Return procedure for TS487IQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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