SSM2301音频放大器

                                           SSM2301 技术资料

The SSM2301 is a fully integrated, high efficiency, Cl*-D audio amplifier designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components and operates from a single 2.5 V to 5.0 V supply. It is capable of delivering 1.4 W of continuous output power with less than 1% THD + N driving an 8 Ω load from a 5.0 V supply.

The SSM2301 features a high efficiency, low noise modulation scheme that does not require external LC output filters. The modu-lation provides high efficiency even at low output power. The SSM2301 operates with 85% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is greater than 98 dB. Spread-spectrum modulation is used to provide lower EMI-radiated emissions compared with other Cl*-D architectures.

The SSM2301 has a micropower shutdown mode with a maximum shutdown current of 30 nA. Shutdown is enabled by applying a logic low to the SD pin.

The device also includes pop-and-click suppression circuitry. 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 SSM2301 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximay VDD/2.

The SSM2301 also has excellent rejection of power supply noise, including noise caused by GSM tran*ission bursts and RF rectification. PSRR is t*ically 63 dB at 217 Hz.

The gain can be set to 6 dB or 12 dB by utilizing the gain control select pin connected respectively to ground or to VDD. Gain can also be adjusted externally by inserting a resistor in series with each input pin.

The SSM2301 is specified over the commercial temperature range (−40°C to +85°C). It has built-in thermal shutdown and output short-circuit protection. It is available in both an 8-lead, 3 mm × 3 mm lead-frame chip scale package (LFCSP) and an 8-lead MSOP package.

SSM2301 应用

• Mobile phones
• MP3 players
• Portable gaming
• Portable electronics
• Educational toys

SSM2301 特点

• Filterless Cl*-D amplifier with Σ-Δ modulation
• No sync necessary when using multiple Cl*-D amplifiers from Analog
• Devices, Inc.
• 1.4 W into 8 Ω at 5.0 V supply with less than 1% THD + N
• 85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
• Greater than 98 dB SNR (signal-to-noise ratio)
• Single-supply operation from 2.5 V to 5.0 V
• 20 nA ultralow shutdown current
• Short-circuit and thermal protection
• Available in 8-lead, 3 mm × 3 mm LFCSP and MSOP packages
• Pop-and-click suppression
• Built-in resistors reduce board component count
• Fixed and user-adjustable gain configurations

SSM2301 功能框图

其他图表

SSM2301 技术指标

SSM2301 芯片订购指南

SSM2301 应用技术支持与电子电路设计开发资源下载

1. ADC音频放大器系列SSM2301 数据手册DataSheet 下载 . PDF(PDF 文件格式完整版)
2. Advantiv 高级电视解决方案 . PDF
3. Analog Devices, Inc.ADI美国模拟器件公司产品订购手册 .PDF
4. ADI 美国模拟器件公司音频放大器选型指南 . PDF

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