丝印代码：ANT8821；2×4.5W/3.7V, adaptive boost, ultra-low EMI, high signal-to-noise ratio, Class G two-channel audio amplifier

Features  2×4.5W output power  Adaptive boost for multiple power rails  Automatic gain control (ALC)  Low battery voltage detection  Ultra-low EMI  Fully differential circuit structure for strong anti-interference capabilities  Power-up and power-down pop-click noise suppression  0

内置升压免滤波D类音频功放

ANT8821是一款自适应升压，超低EMI，高信噪比，双声道G类音频功放。芯片内部集成多路电源轨自适应升压单元，在锂电池3.7V供电时，驱动双通道4Ω负载可以输出2×4.5W恒定功率。此芯片具有低电池电压检测功能，一旦电池电压低于3.5V以下，放大器自动逐步降低增益，保护电池在低压时不被大电流拉宕机，同时确保低电压时应用环境的其他器件供电更加稳定可靠。ALC功能能够自动检测输出失真，动态调整放大器增益，确保输出的音频信号不会出现较大的失真。ANT8821采用频谱扩展PWM调制技术，使得放大器工作在D类模式时能达到与AB类功放相媲美的EMI特性。此外，ANT8821内置过流保护、过热保护功能，确 • 2X4.5W输出功率\n• 多路电源轨自适应升压\n• ALC自动增益控制\n• 低电池电压检测\n• 超低EMI\n• 全差分电路结构，抗干扰能力强\n• 上、下电pop-click噪声音抑制\n• 0.05%的失真度\n• 90dB的信噪比\n• 3V~5.5V单电源电压供电\n• 过流保护、过热保护;

FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS

The NJ8821 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counte

FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS

The NJ8821 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counte

FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS

The NJ8821 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counte

FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS

The NJ8821 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counte

FREQUENCY SYNTHESIZER

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