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STMicroelectronics DEMOTS4995J

Name: DEMOTS4995J
Brand: STMicroelectronics
SKU: DEMOTS4995J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DEMOTS4995J

Manufacturer:: STMicroelectronics

Category:: Audio Amplifier Evaluation Boards

Package:

Datasheet:: DEMOTS4995J.pdf

Description:: EVAL BOARD FOR TS4995

Quantity:: RFQ Add To RFQ list

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Inventory:4,625

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Product details

Overview

TS4995 from STMicroelectronics is a fully differential 1.2 W audio power amplifier IC with 6 dB fixed gain, rail-to-rail output capability at 5 V supply into 8 Ω, ultra-low 10 nA standby current, and selectable active-high/active-low standby control. It delivers high-fidelity audio in space-constrained mobile handsets and portable media players.

For engineers reviewing the TS4995 datasheet, TS4995 pinout, TS4995 application, or TS4995 equivalent, this page provides verified technical context, validated pin functions, real-world application constraints (e.g., differential input noise immunity, thermal shutdown behavior), and confirmed alternative options for audio subsystem design.

Technical Context

The TS4995 implements a monolithic full-differential input/output architecture with integrated common-mode feedback that actively biases both outputs at VCC/2 regardless of input common-mode voltage-enabling robust operation with single-ended or differential sources. Its fixed +6 dB gain eliminates external gain-setting resistors.

It features dual standby control logic: STDBY pin accepts either active-low or active-high assertion via the dedicated STDBY MODE pin, and transitions to full operation in 10 ms (typ.) at 3.3 V. Thermal shutdown activates at 150 °C, protecting against sustained short-circuit loads.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1.2 W RMS @ 5 V, 8 Ω, THD+N = 1%, 1 kHz - sufficient for loudspeaker drive in compact handhelds without heatsink
Supply Voltage Range	2.5 V to 5.5 V - supports Li-ion battery discharge profile (3.0–4.2 V) and USB-powered 5 V systems
Standby Current	10 nA (typ.) - enables multi-week battery standby in always-on audio alert circuits
PSRR	90 dB @ 217 Hz with grounded inputs - rejects GSM burst noise and switching regulator ripple
THD+N	0.5% @ 850 mW, 20 Hz–20 kHz, 8 Ω - meets fidelity requirements for voice and mid-tier music playback
SNR	100 dB (A-weighted) - ensures clean audio path with >60 dB dynamic range margin over typical codec DAC output
Gain	Fixed 6 dB - reduces BOM count by eliminating external gain resistors and associated layout sensitivity

Pinout & Package

TS4995 uses a 9-bump flip-chip package (300 µm bump diameter) with bottom-side interconnects; no leads or exposed pads. Mounting requires controlled reflow per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
VIN+	Differential input non-inverting terminal	Accepts balanced or single-ended signal; common-mode range extends to 0–4.5 V at 5 V supply
VIN−	Differential input inverting terminal	Completes differential pair; CMRR ≥ 60 dB ensures rejection of shared noise on both inputs
VCC	Positive supply rail	Supplies amplifier core and output stage; requires local 1 µF ceramic bypass to GND
VO+	Positive differential output	Rail-to-rail swing; biased at VCC/2 by internal common-mode feedback loop
VO−	Negative differential output	Complementary to VO+; enables true differential speaker drive with 2× voltage swing vs. single-ended
GND	Analog ground reference	Low-impedance return for bias currents and output load; must be star-connected to minimize ground bounce
BYPASS	Half-supply bias capacitor connection	Connects to 1 µF capacitor to stabilize internal VCC/2 reference; critical for pop/click suppression
STDBY	Standby mode enable input	Active-low or active-high per STDBY MODE pin setting; drives <10 nA quiescent current when asserted
STDBY MODE	Standby polarity configuration	Hardwired to VCC (active-high) or GND (active-low); sets STDBY pin logic polarity permanently

Key Features

Feature	Design Value
Differential input architecture	90 dB PSRR and 60 dB CMRR suppress EMI and ground noise in noisy RF environments like cellular handsets
Ultra-low standby consumption	10 nA max current allows integration into always-listening voice-trigger paths without compromising battery life
Configurable standby polarity	Single external tie-off of STDBY MODE pin selects active-high or active-low control-no firmware or logic gate needed
Integrated VCC/2 common-mode feedback	Maintains precise output DC bias across temperature and supply variation, eliminating coupling capacitors in speaker path
Thermal shutdown protection	Auto-recovery shutdown at 150 °C prevents latch-up during accidental short-circuit or PCB overheating

Applications

Mobile Handset Audio

Portable Media Player

Use Scenario: Driving mono loudspeaker in slim smartphone chassis with single Li-ion cell (3.0–4.2 V).

IC Role / Device Role / Timing Role: Full-differential Class-AB audio power amplifier delivering 1.2 W peak into 8 Ω load; handles baseband audio from codec with no external gain components.

Use Value: Eliminates output DC-blocking capacitors via VCC/2 biasing, saving 20 mm² PCB area and enabling direct speaker coupling.

Use Scenario: Battery-powered MP3 player requiring low-noise, long-playback audio output.

IC Role / Device Role / Timing Role: Low-THD+N (0.5%) amplifier operating from 3.3 V supply; interfaces directly to stereo DAC with differential inputs.

Use Value: 100 dB SNR and A-weighted noise floor support >90 dB dynamic range playback, matching premium headphone transducers.

Laptop Speaker Amplifier

Cordless Phone Base Station

Use Scenario: Integrated stereo speaker driver in ultrabook with tight thermal envelope and no heatsink.

IC Role / Device Role / Timing Role: Rail-to-rail output stage delivering 500 mW @ 3.3 V into 8 Ω; thermal shutdown protects against sustained clipping.

Use Value: 10 ms wake-up time enables instant audio response after sleep mode-meets Windows Modern Standby latency requirements.

Use Scenario: Mains-powered DECT cordless phone base station needing reliable, low-pop ringtone amplification.

IC Role / Device Role / Timing Role: Differential-input amplifier accepting analog line-level signal; STDBY pin controlled by MCU GPIO for on-demand activation.

Use Value: Ultra-low 10 nA standby current minimizes idle power draw while maintaining instant readiness for incoming call alerts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio power amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX9718ETA+	2.5 W output @ 5 V, 8 Ω; 1.5 µV/√Hz input noise; requires external gain resistors	Higher output power suits larger speakers; higher noise floor limits SNR-critical applications	Select when >1.2 W output or adjustable gain is required; verify thermal derating with PCB copper area
TAS5706PAG	Class-D, 3 W × 2 channels; I²S input; integrated digital volume control; 12-bit DAC	Digital-input architecture eliminates analog routing; requires clock tree and firmware integration	Select for multi-channel, battery-efficient designs where digital audio interface and lower thermal dissipation are priorities

Compared with MAX9718ETA+ and TAS5706PAG, TS4995 offers lowest component count for analog-input, single-channel, ultra-low-standby applications-ideal where PCB area, analog simplicity, and sub-100 nA quiescent current are decisive.

Availability

TS4995 is available at Aetrix Electronics and suitable for mobile handset audio, portable media players, laptop speaker systems, and cordless phone base stations requiring stable component supply across extended product lifecycles.

Supply support for TS4995 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS4995 belongs to ST's audio power amplifier product line, engineered specifically for high-efficiency, low-EMI, space-constrained portable audio applications where differential signaling, minimal external components, and ultra-low standby power are essential.

FAQ

What is the minimum recommended bypass capacitor value on the VCC pin?

A 1 µF X7R ceramic capacitor placed within 2 mm of the VCC pin and GND is mandatory per the datasheet to ensure stable operation and prevent oscillation. This capacitor must be rated for ≥6.3 V and located adjacent to the flip-chip bump array to minimize inductance.

Can TS4995 drive a 4 Ω speaker load?

Yes-TS4995 delivers up to 1.6 W @ 5 V into 4 Ω (1% THD+N, 1 kHz), but power dissipation increases significantly. At 5 V/4 Ω, thermal derating requires ambient temperature ≤ 60 °C with no heatsink, or ≤ 75 °C with 100 mm² copper pour per the published derating curve.

How does the STDBY MODE pin affect startup timing?

STDBY MODE pin configures the logic polarity of the STDBY input but does not alter wake-up time. Startup remains 10 ms (typ.) at 3.3 V regardless of polarity; the internal bias circuitry activates identically once STDBY transitions from inactive to active state.

Is external input coupling capacitor required?

No-differential inputs accept DC-coupled signals across 0–4.5 V common-mode range at 5 V supply. However, if the source lacks DC offset control, a 330 nF AC-coupling capacitor (as shown in Figure 1) is recommended to prevent output saturation from input DC mismatch.

DEMOTS4995J Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Amplifier Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 1.2W x 1 @ 8Ohm

Voltage - Supply:: 2.5V ~ 5.5V

Utilized IC / Part:: TS4995

Contents:: Board(s)

DEMOTS4995J FAQ

1.How can I place an order for DEMOTS4995J through Aetrix?

Please submit a Request for Quotation (RFQ) for DEMOTS4995J 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 DEMOTS4995J reliable?

The price and inventory of DEMOTS4995J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DEMOTS4995J is usually 5 days.

3.What payment methods are accepted for DEMOTS4995J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DEMOTS4995J transactions.

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4.How is shipping managed for DEMOTS4995J?

DEMOTS4995J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DEMOTS4995J 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 DEMOTS4995J?

For technical support, including DEMOTS4995J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DEMOTS4995J requirements.

6.How does Aetrix verify that DEMOTS4995J is sourced from the original manufacturer or authorized distributors?

All DEMOTS4995J 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 DEMOTS4995J meets industry standards.

7.What is the process for return or replacement of DEMOTS4995J?

All DEMOTS4995J units undergo pre-shipment inspection (PSI). If there is an issue with DEMOTS4995J, 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 DEMOTS4995J part is unused and in its original packaging.

Return procedure for DEMOTS4995J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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