Maxim Integrated Products    Sunnyvale, CA 94086
Jan 20, 2012 Providing Class AB audio performance with Class D efficiency while helping to conserve PCB space in mobile applications such as portable electronic products, MAX98314 mono, 3.2 W, Class D amplifier has integrated input coupling capacitors that provide optimized voltage-independence and matching. Linearity promotes system PSRR and performance at low frequencies, while noise floor level and click-and-pop suppression techniques enhance sound quality.

STMicroelectronics    Lexington, MA 02421
Jan 13, 2012 Measuring 100 mm², Model TDA7498E delivers 320 W of total output power, 160 W on each channel. Device exhibits SNR of 100 dB and provides 4 selectable, fixed-gain settings at 23.8, 29.8, 33.3, and 35.8 dB. Analog IC enables design of platform solutions where speaker impedance can be changed from 8-2 W without power or current limitation. Other features include built-in suppression of pop/click noises, standby and mute functions, and balanced input for best TDMA noise rejection.

Crestron Electronics, Inc.    Rockleigh, NJ 07647
Oct 12, 2011 Used in commercial environments where multiple speakers need to be run from one amplifier, convection-cooled AMP Series helps meet energy savings objectives without sacrificing audio performance. Each channel is selectable for 210 W @ 4 ohms or 120 W @ 8 ohms and isolated 120 W at 70 or 100 V. Delivering low-noise, low-distortion performance, amplifiers have automatic shut-off and turn-on functionality and suit background music, AV presentation, paging, and public address applications.

Crestron Electronics, Inc.    Rockleigh, NJ 07647
Jun 20, 2011 Channel selectable for 70 or 100 V, AMP Series is suited for lecture halls, restaurants, and conference rooms. At less than 11 in. deep, Models AMP 2210S and AMP-3210S offer 2 or 3 channels to drive 4 and 8 W speakers at 120 W and 210 W, respectively. At less than 15 in. deep, Models AMP-2210T and AMP-3210T deliver 2 or 3 channels for 210 W at 4 W, 120 W at 8 W, and 120 W at 70/100 V. Model AMP-2210HT offers full 210 W at 70 V. All fit in 1U rack and include auto power-down.

FSR Metal Products    West Paterson, NJ 07424
May 17, 2011 Suited for boardrooms, houses of worship, control rooms, classrooms, and libraries, Intelli-Tools IT-A25-M70 Mono Amp provides 4-8 W speaker output or 70 V line output at 25 W RMS, while IT-A25 Stereo Amp delivers 25 W/channel output at 8 W and can be bridged to drive 4 W load at 50 W. Both include signal sense trigger for sleep and wake up, music and alarm muting capability, surface mounting brackets, and self-adhesive rubber feet.

Texas Instruments, Inc. (TI)    Dallas, TX 75243-4136
Apr 26, 2011 Model TAS5727, 25 W digital audio power amplifier features 2-band dynamic range compression to provide audio processing capabilities that overcome audio quality limitations of small speakers. Designed for driving stereo bridge-tied speakers, product has RDS(ON) of 75 mW and class-D operation that eliminates need for heatsinks. It is programmed using TAS57xx Graphical Development Environment and can be managed using CC8520 PurePath(TM) SOC via I2C interface.

National Semiconductor Corp.    Santa Clara, CA 95051-0695
Mar 02, 2011 PowerWise® LM49251 IC combines 1.4 W Class D speaker amplifier, 20 mW Class G headphone amplifier, and ALC in 2.55 x 3.02 mm micro SMD package. Consuming less than 7 mA quiescent current at 3.3 V, unit features low EMI pulse-width modulation architecture that reduces RF emissions while preserving audio quality. Mode selection, shutdown, and volume are controlled through I2C-compatible interface, while no-clip ALC feature prevents distortion as battery voltages drop.

National Semiconductor Corp.    Santa Clara, CA 95051-0695
Mar 01, 2011 Designed for smart/feature phones, PowerWise® LM49251 combines 1.4 W Class D speaker amplifier, 20 mW Class G headphone amplifier, and automatic level control (ALC) in an 2.55 x 3.02 mm, 30-bump micro SMD package. Class G headphone amp dynamically reduces supply voltage to lower power consumption and extend audio playback time, while ALC provides several options to control audio distortion. Power consumption is less than 7 mA of quiescent current at 3.3 V for loudspeaker and headphone.

Brüel & Kjær    Norcross, GA 30071-1588
Feb 10, 2011 Supporting listening panels for up to 12 people, Model ZE-0769-004 is suited for sound evaluation during design phase, prototype evaluation, or troubleshooting of new vehicles. Since absolute level has direct effect on juror preference, headphone amplifier is designed to give same level in all channels and has stepped gain control to accurately return to previous setting. Amplifier produces exact replica of input signal and delivers unfiltered signal to all outputs.

Texas Instruments, Inc. (TI)    Dallas, TX 75243-4136
Feb 01, 2011 Integrating DAC and power rails, Model TLV320DAC3202 features digital input I²S and integrated clocking system that delivers 100 dB SNR at 6.5 mW power dissipation. Power management technology facilitates seamless operation between battery and switched mode input voltage supply for efficient playback. With 2 x 2.5 mm footprint, standalone headset driver offers optimal PSRR, enabling direct power from asynchronous switched mode input voltage supply at 100 dB per channel SNR.

Maxim Integrated Products    Sunnyvale, CA 94086
Jan 21, 2011 Housed in 0.3 mm pitch, 9-bump WLP measuring 1 x 1 mm, MAX98304 provides output power to 3.2 W with 10 µVrms noise. Patented EMI-reduction techniques and circuit design eliminate need for output filtering. Since no filtering components of any kind are required with speaker cable or trace lengths of 24 in. and beyond, MAX98304 saves board space. Fully specified over -40 to +85°C temperature range, amplifier is suited for cell phones, tablets, e-readers, notebooks, and netbooks.

Crestron Electronics, Inc.    Rockleigh, NJ 07647
Jan 05, 2011 Combining amplifier, matrix switcher, and digital audio processor, Sonnex(TM) 24X8 Multiroom Audio System transmits 48 channels of uncompressed 24-bit HD audio across single shielded CAT5-type cable. System pumps 240 W per channel at 4 W to up to 74 speaker zones. For optimal sound quality in each zone, acoustics are customized and adjusted from room to room and for outdoor zones. System virtually eliminates need to pull bundles of speaker wire through walls and ceilings.

STMicroelectronics    Lexington, MA 02421
Dec 01, 2010 Model TS4604 stereo audio amplifier integrates 100 mW stereo headphone output and driver for audio line-out connection in audio-video equipment. Low operating power and dedicated shutdown control per function help meet eco-design objectives. Self-muting optimizes sound quality by preventing audible pop and click noises, and charge-pump circuitry supplies negative voltage to amplifier, allowing 3.0-4.8 V external power supply to sustain output signal, which can be up to 2 Vrms at line driver output.

Wolfson Microelectronics plc    Edinburgh EH11 2QB  United Kingdom
Nov 23, 2010 Supplied in 14-pin SOIC package and powered by single 3.3 V supply, WM3100 delivers delivers 108 dB SNR and -95 dB THD+N as well as dedicated pins to control mute and output modes. Stereo output amplifiers drive variety of audio loads, and integrated charge pump generates negative supply for ground-referenced stereo 2 Vrms outputs. Other features include stereo differential inputs and support for stereo single-ended inputs in inverting and non-inverting configurations.

Panasonic - Vision Systems/OEM    Secaucus, NJ 07094
Nov 03, 2010 Suited for K-12 classroom settings, WX-LAK12 Amplifier/Receiver works with WX-LT350 IR wireless pendant microphone, which is designed with panic button that allows teacher to alert administration in case of incident and turns classroom document camera into video surveillance camera. Single-channel WX-LAK12 includes 20 W amplifier, 2 line inputs, and 4 speaker connections as well as volume control for microphone, line input volume controls, and feedback blocker on/off.

STMicroelectronics    Lexington, MA 02421
Sep 27, 2010 With start/stop compatibility, 4 x 50 W Model TDA7850LV allows entertainment equipment in hybrid cars to operate without interruption as engine is turned off and restarted. Audio power amplifier features 2 W output drivers compatible with diverse speaker types, and integrated 0.35 A high-side driver supporting functions such as antenna control. Chip provides protection against short circuits to ground and battery, open-circuited speakers, load-dump, over-temperature, and ESD.

Intersil Corporation    Milpitas, CA 95035
Sep 14, 2010 Model D2-45057 and D2-45157 digital audio amplifiers include 4 configurable power stages which operate as 4 separate half-bridge outputs, as 2 full-bridge outputs, or in combinations of half-bridge plus full-bridge. Output power is 25 W at 8 W and 30 W at 8 W, and units feature up to 5 programmable audio signal path channels and asynchronous sample rate converters with sample rates from 32-192 KHz. They have 9-26 V power stage HV supply range as well as temperature and undervoltage monitoring.

Rohm Electronics USA LLC    Antioch, TN 37013
Aug 30, 2010 Accommodating compact, portable equipment put to continuous use that requires extended operating times from one battery, BU7150NUV supports operating power supply ranges of 0.93-3.5 V and 1.03-3.5 V. Automatic startup sequence control circuit, power ON reset function, and clicking/popping noise reduction circuit promote optimal performance, while 1 mA operation promotes battery life. Other features include thermal shutdown circuit and selectable BTL connection.

austriamicrosystems AG    Premstatten   Austria
Aug 23, 2010 Supplied in 16-ball, 1.6 x 1.6 mm WL-CSP, Class G AS3560 and Class H AS3561 extend music playback time while maintaining optimal audio performance in any media device that uses headphones. These 30 mW amps minimize power consumption by continuously adjusting supply rails in response to input signal. Quiescent current is 1 mA (both channels enabled), shutdown current is under 5 µA, and amps maintain audio performance with greater than 100 dB SNR @ 1 Vrms and THD of 0.02% at 16 W.

Maxim Integrated Products    Sunnyvale, CA 94086
Aug 13, 2010 Available in 2 x 12 W, 2 x 20 W, and 1 x 40 W configurations, MAX98400 Series features anticlipping circuit that avoids clipping by automatically reducing amplifier's gain when supply voltage is insufficient to deliver desired output voltage. Thermal foldback prevents unwanted thermal shutdown events by reducing output signal when internal junction temperature exceeds +120°C. Specified over -40 to +85°C extended temperature range, devices are suited for TVs, notebooks, and desktop PCs.