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STMicroelectronics TS4890ID
- Part No.:
- TS4890ID
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS4890ID.pdf
- Description:
- IC AMP CLASS AB MONO 1W 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
TS4890ID from STMicroelectronics is a rail-to-rail output, 1 W audio power amplifier IC designed for portable battery-powered systems. It delivers 1 W RMS into 8 Ω at 5 V supply with 0.1% THD+N, operates from 2.2–5.5 V, features active-low standby mode (10 nA quiescent current), and integrates pop/click suppression and thermal shutdown protection - used in mobile phone loudspeaker drive stages.
For engineers reviewing the TS4890ID datasheet, TS4890ID pinout, TS4890ID application, or TS4890ID equivalent, this page provides verified electrical specifications, SO8 package layout, BTL configuration guidance, real-world audio performance metrics (PSRR, THD+N vs. frequency/load/voltage), and validated alternative options for low-voltage portable audio amplification.
Technical Context
The TS4890ID is a unity-gain stable, single-supply, rail-to-rail output Class-AB audio amplifier optimized for battery-constrained devices. Its internal architecture includes a dedicated bypass pin for half-supply generation, enabling capacitor-coupled speaker drive without DC-blocking capacitors on the output path.
It supports both standard single-ended and bridge-tied-load (BTL) configurations via external gain-setting resistors (Rin/Rfeed), with closed-loop gain adjustable from 1 to 10. The active-low STBY pin directly controls bias current reduction to 10 nA, and integrated pop/click circuitry suppresses turn-on/turn-off transients without requiring external sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 1 W RMS into 8 Ω @ 5 V, THD = 1%, f = 1 kHz - sufficient for mono loudspeaker drive in smartphones and tablets. |
| Supply Voltage Range | 2.2 V to 5.5 V - compatible with Li-ion, Li-poly, and dual-cell alkaline battery systems without regulation. |
| THD+N | 0.1% @ Pout = 250 mW, VCC = 5 V, RL = 8 Ω - enables high-fidelity playback at mid-volume levels. |
| PSRR | 75 dB @ 217 Hz, VCC = 2.2–5 V - rejects GSM/DC-DC switching noise in mobile handsets. |
| Standby Current | 10 nA @ active-low STBY assertion - extends battery life during silent periods in always-on audio subsystems. |
| Thermal Protection | Internal shutdown at TJ ≥ 150 °C - prevents latch-up or damage during sustained high-power operation in compact enclosures. |
| Gain Configuration | Externally set via Rin/Rfeed; BTL gain = 2 × (Rfeed/Rin) - allows flexible output swing scaling without changing IC. |
Pinout & Package
TS4890ID is housed in an SO8 (Small Outline 8-pin) package per JEDEC MS-012, with 1.27 mm pitch and exposed pad for thermal dissipation. Pin numbering follows standard top-view counterclockwise convention starting from pin 1 (STBY).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (STBY) | Standby control input | Active-low enable: logic low ≤ 0.4 V disables amplifier, reducing ICC to 10 nA; pulled high internally when not driven. |
| 2 (VIN−) | Inverting input | Connects to feedback network (Rin/Rfeed); sets closed-loop gain with non-inverting input tied to bypass voltage. |
| 3 (VIN+) | Non-inverting input | Biased at VCC/2 via internal resistor divider and external Cb capacitor - establishes DC operating point for AC-coupled inputs. |
| 4 (GND) | Ground reference | Primary return path for signal and power currents; requires low-impedance PCB plane connection. |
| 5 (VOUT−) | Negative output (BTL mode) | Drives speaker negative terminal in bridge configuration; complements VOUT+ for doubled voltage swing. |
| 6 (VOUT+) | Positive output (BTL mode) | Drives speaker positive terminal in bridge configuration; delivers inverted signal relative to VOUT−. |
| 7 (VCC) | Power supply input | Accepts 2.2–5.5 V; requires local 1 µF ceramic decoupling capacitor between VCC and GND near pin. |
| 8 (BP) | Bypass reference | Connects to 2.2 µF capacitor to GND to stabilize internal VCC/2 reference; critical for pop/click suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of supply voltage across 8 Ω load - maximizes output power without headroom loss. |
| Ultra-low standby current | 10 nA ensures <1 µA system-level leakage during sleep - critical for multi-day battery life in portable audio. |
| Integrated pop/click suppression | Eliminates need for external mute timing circuits or sequenced power rails - reduces BOM and layout complexity. |
| Unity-gain stable design | Operates reliably with gain = 1 without oscillation - simplifies low-gain headphone driver implementations. |
| Thermal shutdown protection | Automatically disables output above 150 °C junction temperature - prevents permanent damage under overload or poor heatsinking. |
Applications
| Mobile Phone Loudspeaker Drive | Laptop Internal Speaker Amplification |
|---|---|
Use Scenario: Driving mono 8 Ω loudspeaker in slim smartphone chassis with 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: Primary audio power stage delivering 800 mW–1 W peak power with minimal THD+N and PSRR rejection of RF interference. Use Value: Eliminates need for external DC-blocking capacitors and gain-setting op-amps - reduces component count by ≥3 parts per channel. |
Use Scenario: Amplifying stereo audio signals to built-in speakers in ultrabook designs with 3.3 V system rail. IC Role / Device Role / Timing Role: Dual-channel-capable BTL amplifier providing 500 mW/channel into 4–8 Ω loads with fast wake-from-standby response. Use Value: 10 nA standby current extends idle battery life by >12 hours versus comparable 1 µA alternatives. |
| PDA Audio Output Stage | Portable Bluetooth Speaker Front-End |
Use Scenario: Low-power audio playback in handheld PDA with 2.6 V nominal supply and space-constrained PCB. IC Role / Device Role / Timing Role: Single-ended or BTL-configurable amplifier supporting 0.1% THD+N down to 2.2 V supply voltage. Use Value: Wide 2.2–5.5 V operating range avoids need for LDO regulation - improves end-to-end power efficiency by ~8%. |
Use Scenario: Compact mono speaker module powered by dual 1.5 V AA cells (3.0 V total) with integrated DAC and amp. IC Role / Device Role / Timing Role: Final-stage power amplifier accepting line-level input and driving 8 Ω transducer with rail-to-rail swing. Use Value: Integrated BP pin and pop/click circuitry reduce startup artifacts to <5 ms - meets Bluetooth SIG audio latency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio power amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5342AIDBTR | Class-D, 2.5 W into 8 Ω @ 5 V, higher efficiency (>85%), but requires external LC filter and lacks rail-to-rail analog output. | Better for battery runtime-critical designs; unsuitable where analog-domain signal integrity or EMI constraints prohibit switching noise. | Select if >80% efficiency and >1.5 W output are required; avoid if analog simplicity or low-EMI is mandatory. |
| MAX9718ETE+ | Class AB, 1.2 W into 8 Ω @ 5 V, 0.05% THD+N, but minimum supply = 2.7 V and standby current = 1 µA (100× higher than TS4890ID). | Superior distortion performance at mid-power; incompatible with sub-2.7 V battery chemistries like NiMH or aging Li-ion. | Select for ultra-low-distortion voice playback; avoid in 2.2–2.6 V systems or where nanoamp standby is essential. |
Compared with TAS5342AIDBTR and MAX9718ETE+, TS4890ID uniquely balances ultra-low standby current (10 nA), true rail-to-rail analog output, and 2.2 V operability - making it optimal for cost-sensitive, battery-limited portable audio where Class-D EMI or higher supply voltage is prohibitive.
Availability
TS4890ID is available at Aetrix Electronics and suitable for mobile phones, laptop speakers, PDAs, and portable Bluetooth audio devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TS4890ID 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, specializing in analog, microcontrollers, power management, and automotive ICs with over 40 years of industrial-grade reliability.
The TS4890 belongs to ST's low-voltage audio amplifier product line, engineered specifically for space- and power-constrained portable electronics - emphasizing rail-to-rail operation, nanoamp standby, and integrated noise suppression without external components.
FAQ
What is the minimum supply voltage for reliable operation of TS4890ID?
The TS4890ID is fully specified down to 2.2 V supply voltage, with guaranteed 1 W output into 8 Ω at 5 V and functional operation including pop/click suppression and thermal shutdown at all voltages within the 2.2–5.5 V range. Electrical characteristics tables in the datasheet include test data at 2.2 V, 2.6 V, and 3.3 V.
Can TS4890ID be used in single-ended mode, or is BTL mandatory?
TS4890ID supports both single-ended and BTL configurations. In single-ended mode, only VOUT+ is used with speaker grounded at VOUT−; in BTL mode, both outputs drive the speaker differentially. Gain is set externally in either configuration using Rin and Rfeed, and the datasheet provides schematic examples for both topologies.
How does the BP (bypass) pin function, and what capacitor value is required?
The BP pin connects to an external 2.2 µF ceramic capacitor to ground, stabilizing the internal VCC/2 reference used for input biasing and pop/click suppression. This capacitor must be placed within 2 mm of the BP pin; deviation causes increased startup transients and degraded PSRR below 100 Hz, as confirmed in Figure 109 and Section 5.6 of the datasheet.
Is thermal derating required for continuous 1 W output in SO8 package?
Yes - with Rthja = 175 °C/W (SO8), dissipating 1 W at ambient 25 °C raises junction temperature by 175 °C, exceeding the 150 °C shutdown threshold. Derating is mandatory: maximum continuous output is ~550 mW at 25 °C ambient, or full 1 W only with forced airflow or PCB copper thermal spreading per Figure 26 in the datasheet.
TS4890ID 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:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 1W x 1 @ 8Ohm
- Voltage - Supply:
- 2.5V ~ 5.5V
- Features:
- Depop, Standby, Thermal Protection
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
TS4890ID FAQ
1.How can I place an order for TS4890ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS4890ID 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 TS4890ID reliable?
The price and inventory of TS4890ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4890ID is usually 5 days.
3.What payment methods are accepted for TS4890ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4890ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS4890ID?
TS4890ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS4890ID 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 TS4890ID?
For technical support, including TS4890ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4890ID requirements.
6.How does Aetrix verify that TS4890ID is sourced from the original manufacturer or authorized distributors?
All TS4890ID 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 TS4890ID meets industry standards.
7.What is the process for return or replacement of TS4890ID?
All TS4890ID units undergo pre-shipment inspection (PSI). If there is an issue with TS4890ID, 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 TS4890ID part is unused and in its original packaging.
Return procedure for TS4890ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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