Intersil Corporation announces two new audio amplifiers, the ISL99201 and ISL99202, which are the industry's lowest power, smallest size and most resistant to RF interference.
This article refers to the address: http://
The ISL99201 and ISL99202 are the first audio products in the Intersil ultra-small footprint package family. This family of products meets the requirements for smaller, thinner, lighter consumer electronics and lower power consumption. These two audio amplifiers are especially suitable for smartphones, PDAs, game controllers, MP3 and personal media players, personal navigation devices, LCD TVs and more.
The ISL99201 is the world's smallest Class D amplifier in a 9-bump, 0.4mm pitch WCSP package. It is a filterless, fully integrated, high efficiency mono amplifier that provides up to 2.5W of power for a 4Ω load. The ISL99201 features a low-noise modulation scheme that delivers 86% efficiency and a signal-to-noise ratio (SNR) greater than 95dB when outputting 400mW for an 8Ω load. The ISL99201 also includes a micropower shutdown mode with a typical shutdown current of 200nA. The ISL99201 offers three fixed gain settings and programmable gain options to reduce bill of materials (BOM) costs, save board space, and increase design flexibility. In addition to the WCSP package, the ISL99201 is available in an 8-pin TDFN package.
The 12-bump, 0.4mm pitch WCSP package of the ISL99202 is the world's smallest stereo, capacitance-free Class D amplifier supporting 16Ω to 600Ω speaker impedance. With an ultra-wide operating voltage of 2.4V to 5.5V, the ISL99202 is ideal for mobile devices that use 2 AA batteries or a Li-Ion battery, as well as laptops for 3.3V to 5V power supplies. The ISL99202 is also available in a 12-pin TQFN package.
The industry's strongest anti-RF interference capability With the widespread use of wireless technology, audio amplifiers are bound to be affected by RF energy. For example, although the operating frequency of the GSM protocol mobile phone is 800MHz and 1900MHz, the data transmission is concentrated at a frequency of 217Hz, which is just in the frequency range of the audio, which causes many audio amplifiers of the industry to emit in the earphones. The well-known "hornet bee"-like noise. The main reason for this phenomenon is that those audio amplifiers will detect the 217 Hz signal, demodulate the signal into the FM band, and then amplify it to the output of the headphones. The ISL99202 uses a special input architecture that suppresses this demodulation and prevents 217Hz bursts from interfering with audio output.
In addition, burst noise at 217 Hz produces spikes in the power supply, and when the amplifier couples these supply spikes to the output, it also produces ripple noise. Among the many parameters of the amplifier, the power supply rejection ratio (PSRR) is used to measure the ability of the amplifier to reject noise from the power supply. The ISL99202 has the highest PSRR value in its class, confirming its position as the industry's strongest RF immunity.
Pricing and availability
The ISL99201 is available now in an 8-pin TDFN package and is priced at $0.56 for 1,000-piece quantities and $0.47 for a 9-bump WCSP package. The ISL99202 is available now in a 12-pin TQFN package and a 0.4mm pitch, 12-bump WLCSP package, priced at $0.72 and $0.65 for 1,000-piece quantities.
Deep Drawing Parts, Stamping,Metal Processing Machinery Parts,Lost Wax Casting
Deep Drawing Parts,Electric Terminal Co., Ltd. , http://www.nbboltandnut.com