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STMicroelectronics TS487ID
- Part No.:
- TS487ID
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS487ID.pdf
- Description:
- IC AMP CLASS AB STEREO 108MW 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
TS487ID from STMicroelectronics is a dual-channel, unity-gain stable audio power amplifier optimized for stereo headphone drive in low-voltage portable systems. It delivers 102 mW per channel into 16Ω at 5V (0.1% THD+N), operates from 2V to 5.5V, features active-high standby control, and achieves 103 dB(A) SNR and 83 dB crosstalk rejection at 1 kHz.
For engineers reviewing the TS487ID datasheet, TS487ID pinout, TS487ID application, or TS487ID equivalent, this device is selected for ultra-low-power audio output stages requiring high PSRR (58 dB), click/pop suppression, short-circuit protection, and compatibility with 16–32Ω transducers in space-constrained mobile and embedded designs.
Technical Context
The TS487ID implements a dual rail-to-rail output stage with internal biasing for single-supply operation and includes dedicated ON/OFF click reduction circuitry to minimize transient artifacts during enable/disable transitions. Its fixed-gain variants (e.g., TS487-1I, TS487-2I) eliminate external feedback components while maintaining stability across supply voltages from 2V to 5.5V.
Standby mode is activated by pulling the SHUTDOWN pin high (TS487-specific logic), reducing quiescent current to 10 nA typical. The amplifier supports both capacitive-coupled and DC-coupled load configurations, with input offset voltage ≤1 mV and input bias current ≤200 nA - enabling precision gain-setting when used in external-resistor configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - enables direct integration with Li-ion, Li-polymer, and 3.3 V/5 V system rails without LDO pre-regulation. |
| Output Power @ 5V | 102 mW per channel into 16Ω @ 0.1% THD+N - sufficient for loud, distortion-free headphone playback in portable audio devices. |
| Quiescent Current | 2.5 mA max - minimizes battery drain during active audio playback in always-on or streaming applications. |
| Standby Current | 10 nA typical - allows multi-week standby in battery-powered devices with infrequent audio use. |
| Signal-to-Noise Ratio | 103 dB(A) - ensures high-fidelity audio reproduction with negligible background noise in quiet listening environments. |
| Crosstalk Rejection | 83 dB at 1 kHz - preserves stereo imaging integrity by preventing inter-channel signal leakage in dual-channel paths. |
| PSRR | 58 dB at 1 kHz - rejects power supply ripple and digital switching noise without requiring ultra-clean analog rails. |
Pinout & Package
TS487ID is packaged in SO8 (Small Outline Integrated Circuit, 8-pin), a standard surface-mount package with 1.27 mm pitch, suitable for automated assembly and thermal management in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: BYPASS | Half-supply decoupling node | Connects to CB capacitor (typically 1 µF) to stabilize internal bias point and reduce noise coupling between channels. |
| 2: GND | Analog and power ground reference | Common return path for all internal circuitry; requires low-impedance connection to PCB ground plane. |
| 3: SHUTDOWN | Active-high enable control | Drives amplifier into ultra-low-power standby (10 nA) when pulled high; logic threshold defined as VCC for activation. |
| 4: Vcc | Positive supply input | Accepts 2–5.5 V; must be bypassed with CS capacitor (e.g., 100 nF) near the pin to suppress high-frequency supply noise. |
| 5: OUT(2) | Channel 2 output driver | Rail-to-rail output capable of sourcing/sinking ≥106 mA; designed for direct connection to 16–32Ω headphone loads. |
| 6: OUT(1) | Channel 1 output driver | Electrically identical to OUT(2); independent output stage ensures channel isolation and simultaneous stereo drive. |
| 7: VIN(2) | Inverting input for channel 2 | Accepts differential or single-ended audio signals; input impedance ≥20 kΩ supports standard line-level source interfacing. |
| 8: VIN(1) | Inverting input for channel 1 | Matches VIN(2) characteristics; supports external gain configuration via RFEED/RIN or fixed-gain variants (e.g., TS487-1I). |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Eliminates need for external compensation; supports fixed-gain (-1x, -2x, -4x) or user-configurable closed-loop gain without oscillation risk. |
| Click/pop suppression circuitry | Reduces audible transients during power-up, shutdown, or mute/unmute events - critical for consumer-grade audio user experience. |
| Short-circuit current limiting | Protects output stage against sustained shorts to VCC or GND; enables robust operation in unattended or field-deployed equipment. |
| High PSRR (58 dB) | Mitigates noise coupling from shared digital power domains, reducing need for separate analog regulators in mixed-signal SoC designs. |
| Low THD+N (0.3% max) | Ensures clean audio reproduction across full bandwidth (20 Hz–20 kHz) at rated output power levels into real-world headphone impedances. |
Applications
| Mobile Headphone Drive | USB-C Audio Adapter |
|---|---|
|
Use Scenario: Driving stereo headphones directly from a smartphone baseband processor's analog audio outputs. IC Role / Device Role / Timing Role: Dual-channel Class-AB headphone amplifier providing rail-to-rail output swing and low-noise amplification. Use Value: Delivers 102 mW/channel into 16Ω at 5V with <0.1% THD+N, enabling loud, distortion-free playback without external boost converters. |
Use Scenario: Embedded audio interface in USB-C dongles supporting analog headset output alongside digital data lanes. IC Role / Device Role / Timing Role: Low-quiescent-current stereo amplifier with active-high standby, synchronized to USB enumeration status. Use Value: 10 nA standby current extends dongle battery life during host sleep; 2V minimum supply supports USB-C VBUS dropout scenarios. |
| Industrial Audio Monitor | Portable Medical Audio Alert |
|
Use Scenario: Real-time audio monitoring in ruggedized handheld test equipment with isolated analog inputs. IC Role / Device Role / Timing Role: High-PSRR (58 dB), low-offset (≤1 mV) dual amplifier buffering and amplifying sensor-derived audio alerts. Use Value: Rejects EMI from nearby switching power supplies and maintains >83 dB crosstalk isolation for accurate left/right channel diagnostics. |
Use Scenario: Battery-powered patient monitor generating audible alarm tones through integrated mono/stereo speakers or earpieces. IC Role / Device Role / Timing Role: Reliable, short-circuit protected audio output stage with guaranteed operation down to 2V battery voltage. Use Value: Maintains 12 mW/channel output into 16Ω at 2V (0.3% THD+N), ensuring audible alerts even during end-of-life battery conditions. |
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 supply range (2.7–5.5 V); 95 mW/channel into 16Ω at 5V; no active-high standby (active-low only). | Requires level-shifting for standby control in TS487ID-compatible logic systems; lacks 2V operation capability. | Select when higher output voltage swing (>4.5 V) or better thermal resistance (RθJA = 65°C/W) is prioritized over ultra-low-VCC support. |
| TAS5707PAG | Digital-input Class-D amplifier; I²S/PCM interface; 1.5 W into 8Ω; not pin-compatible; requires external DAC and clocking. | Targets high-efficiency, high-power speaker drive-not low-noise, low-THD headphone output. | Select only for battery-constrained speaker applications where >80% efficiency outweighs analog fidelity requirements. |
Compared with MAX4410ETE+ and TAS5707PAG, TS487ID uniquely supports 2V operation, active-high standby, and 103 dB SNR in an SO8 package-making it optimal for legacy analog audio subsystems demanding minimal BOM count and proven reliability.
Availability
TS487ID is available at Aetrix Electronics and suitable for mobile phone audio subsystems, portable medical alert devices, and industrial handheld monitors requiring stable component supply across extended product lifecycles.
Supply support for TS487ID 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 TS487ID belongs to ST's audio power amplifier product line, engineered specifically for low-voltage, low-noise stereo headphone drive in battery-powered portable electronics with stringent size and power constraints.
FAQ
What is the minimum supply voltage for reliable operation of TS487ID?
The TS487ID is fully specified down to 2 V, delivering 7 mW per channel into 16Ω at 0.3% THD+N. Output swing remains functional (VOL = 0.24 V, VOH = 1.73 V) with rail-to-rail capability preserved, making it suitable for single-cell Li-ion or alkaline battery applications where voltage droop occurs.
Does TS487ID require external gain-setting resistors?
No - TS487ID itself is the base part number for the externally configurable version, but the "ID" suffix indicates the SO8-packaged variant of the TS487 family, which supports both external resistor gain and fixed-gain derivatives (e.g., TS487-1I). Fixed-gain versions omit RIN/RFEED components; the base TS487ID retains full external configurability.
How does the SHUTDOWN pin behave on TS487ID versus TS486ID?
TS487ID uses active-high standby logic: driving SHUTDOWN ≥VCC (or ≥1.5 V) places the device in standby (10 nA ISTANDBY). In contrast, TS486ID requires SHUTDOWN ≤0.4 V (active-low). This polarity difference prevents accidental shutdown in systems sharing control logic between the two families.
Can TS487ID drive 32Ω headphones effectively at 3.3V?
Yes - at 3.3 V, TS487ID delivers 38 mW per channel into 32Ω at 0.1% THD+N (1 kHz), with 98 dB SNR and 80 dB crosstalk. Output swing reaches VOH = 2.68 V and VOL = 0.3 V, ensuring full dynamic range utilization and low distortion across the audio band.
TS487ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
TS487ID FAQ
1.How can I place an order for TS487ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS487ID 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 TS487ID reliable?
The price and inventory of TS487ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS487ID is usually 5 days.
3.What payment methods are accepted for TS487ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS487ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS487ID?
TS487ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS487ID 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 TS487ID?
For technical support, including TS487ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS487ID requirements.
6.How does Aetrix verify that TS487ID is sourced from the original manufacturer or authorized distributors?
All TS487ID 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 TS487ID meets industry standards.
7.What is the process for return or replacement of TS487ID?
All TS487ID units undergo pre-shipment inspection (PSI). If there is an issue with TS487ID, 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 TS487ID part is unused and in its original packaging.
Return procedure for TS487ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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