SSM2166S-REEL 音频放大器SOIC-14封装
The SSM2166 integrates a complete and flexible solution for conditioning microphone inputs in computer audio systems. It is also excellent for improving vocal clarity in communications and public address systems. A low noise, voltage-controlled amplifier (VCA) provides a gain that is dynamically adjusted by a control loop to maintain a set compression characteristic. The compression ratio is set by a single resistor and can be varied from 1:1 to over 15:1 relative to a user-defined rotation point; signals above the rotation point are limited to prevent overload and to eliminate popping. In the 1:1 compression setting, the SSM2166 can be programmed with a fixed gain of up to 20 dB; this gain is in addition to the variable gain in other compression settings. The input buffer can also be configured for front-end gains of 0 dB to 20 dB. A downward expander (noise gate) prevents amplification of noise or hum. This results in optimized signal levels prior to digitization, thereby eliminating the need for additional gain or attenuation in the digital domain that could add noise or impair accuracy of speech recognition algorithms. The compression ratio and time constants are set externally. A high degree of flexibility is provided by the VCA gain, rotation point, and noise gate adjustment pins.
The SSM2166 is an ideal companion product for audio codecs used in computer systems, such as the AD1845. The SSM2166 is available in a 14-lead SOIC package and is guaranteed for operation over the extended industrial temperature range of −40°C to +85°C.
SSM2166S-REEL 应用
- Microphone preamplifiers/processors
- Computer sound cards
- Public address/paging systems
- Communication headsets
- Telephone conferencing
- Guitar sustain effects generators
- Computerized voice recognition
- Surveillance systems
- Karaoke and DJ mixers
SSM2166S-REEL 特征
- Complete microphone conditioner in a
- 14-lead package
- Single 5 V operation
- Adjustable noise gate threshold
- Compression ratio set by external resistor
- Automatic limiting feature-prevents ADC overload
- Adjustable release time
- Low noise and distortion
- Power-down feature
- 20 kHz bandwidth (±1 dB)
SSM2166S-REEL 功能框图
Functional Block Diagram for SSM2166
SSM2166S-REEL 技术指标
| PSRR (dB) | 50dB | Supply Current | 10mA |
| THD+N @ 1kHz (%) | 0.25% | Compression Ratio Range | 1:1 to 15:1 |
| Product Description | Mic Conditioner w/ Noise Gate | Gain Bandwidth Product | 30MHz |
| Pos Supply | +4.5V to +5.5V |
SSM2166 芯片订购指南
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| SSM2166S | 量产 | 14 ld SOIC | 14 | 工业 |
| SSM2166S-REEL | 量产 | 14 ld SOIC | 14 | 工业 |
| SSM2166S-REEL7 | 量产 | 14 ld SOIC | 14 | 工业 |
| SSM2166SZ | 量产 | 14 ld SOIC | 14 | 工业 |
| SSM2166SZ-REEL | 量产 | 14 ld SOIC | 14 | 工业 |
| SSM2166SZ-REEL7 | 量产 | 14 ld SOIC | 14 | 工业 |
