| Amplifier Type | Class D |
| THD+N (%) | .05 |
| SNR (dB) | 102 |
| POUT @ 1% THD (W) | 1.15 |
| IDD Current (mA) | 3.2 |
| Shutdown Current (μA) | .2 |
| Power Supply Range (min) (V) | 2.4 |
| Power Supply Range (max) (V) | 5.5 |
ISL99201 和ISL99202 是Intersil超小占位封装家族当中的首批音频产品。该系列产品可满足消费电子产品更小、更薄、更轻的要求，且耗电量也更低。这两款音频放大器尤其适用于智能手机、PDA、游戏控制器、MP3和个人媒体播放器、个人导航设备、LCD TV等。
采用9凸点、0.4mm间距WCSP封装的ISL99201 是世界上最小的D类放大器，它是无滤波器、全集成、高效的单声道放大器，可为4Ω负载提供最多2.5W的功率。ISL99201 具有低噪声的调制机制，为8Ω负载输出400mW功率时的效率为86%，信噪比(SNR)大于95dB。ISL99201 还包括一个微功率的关断模式，典型关断电流为200nA。ISL99201 提供了三种固定增益设置和可编程增益选项，可降低材料清单(BOM)成本，节约电路板空间，并提高设计灵活性。除WCSP封装外，ISL99201 还提供8引脚的TDFN封装。
The ISL99201 is a fully integrated high efficiency class-D mono amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum requirement of external components and operates from a 2.4V to 5.5V input supply. It is capable of delivering 1.4W of continuous output power with less than 1% THD+N driving a 8Ω load from a 5V supply。
The ISL99201 features a high-efficiency, low-noise modulation scheme. It operates with 86% efficiency at 400mW into 8Ω and has a signal-to-noise ratio (SNR) that is better than 95dB. The ISL99201 has a micro-power shutdown mode with a typical shutdown current of 200nA. Shutdown is enabled by applying a logic low to the SD pin 。
The architecture of the devices allows it to achieve very low level of pop-and-click. This minimizes voltage glitches at the output during turn-on and turn-off, thus reducing audible noise on activation and deactivation。
The fully differential input of the ISL99201 provides excellent rejection of common mode noise on the input typically 75dB. EMI suppression is achieved by SRC (Slew Rate Control). The ISL99201 oscillator can be synchronized to an external clock through the SYNC input, allowing the switching frequency to be externally defined. The SYNC input also allows multiple ISL99201 to be cascaded and frequency locked; minimizing interference due to clock intermodulation. SYNC is available only in DFN version。
The ISL99201 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification. PSRR is typically 75dB at 217Hz. There will be 4 versions of the part; they will consist of three fixed gain settings (6dB, 9.6dB, 12dB) and one user programmable gain setting (need external resistors). The ISL99201 has built-in thermal shutdown and output short-circuit protection。
| 产品状态 | 温度范围 | 潮湿敏感度等级MSL |
| ISL99201IRTAZ-T | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTAZ-TK | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTBZ-T | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTBZ-TK | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTCZ-T | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTCZ-TK | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTDZ-T | 工业级 | 8 Ld TDFN T+R |
| ISL99201IRTDZ-TK | 工业级 | 8 Ld TDFN T+R |