AD1990 D类音频功率放大器– 2 × 5W
包括AD1990、AD1992与AD1994在内的AD199x系列放大器将一个立体声Σ-Δ调制器和立体声“桥接”式负载(BTL)功率级集成到单芯片上。AD199x放大器提供高保真音响质量(总谐波失真（THD ）＜0.005 %,信噪比（SNR） > 105 dB；电源抑制比(PSRR) > 65 dB),同传统的线性放大器相比,散热降低至少50 %。通过将Σ-Δ调制器与桥驱动电路以及大功率输出级相集
AD1990 特点
- Integrated Stereo ∑ Modulator and Power Stage
- 0.005% THD+N
- 101.5 dB Dynamic Range
- PSRR>65dB
- RDS-ON < 0.3 Ohm (per transistor)
- Efficiency >80% @ 5 W/6 Ohm
- EMI Optimized Modulator
- On-Off-Mute Pop Noise Suppression
- Short Circuit Protection
- Over-Temperature Protection
- Low Cost DMOS Process
- Package Options: 64-LFCSP
AD1990 功能框图
AD1990 技术指标
| Output Power (W) | 5W | THD+N (dB) | -90dB |
| Efficiency (%) | 84% | Pos Supply | +8V to +12V |
| Dynamic Range (dB) | 102dB | Supply Current | 30mA |
| SNR (dB) | 102dB |
AD1990 订购指南
| 产品型号 | Temperature Range | 封装 | Package Option |
|---|---|---|---|
| AD1990ACPZ | -40°C to +85°C | 64-Lead Lead Frame Chip Scale Package (LFCSP_VQ) | CP-64-3 |
| AD1990ACPZRL | -40°C to +85°C | 64-Lead Lead Frame Chip Scale Package (LFCSP_VQ), 13” Tape and Reel | CP-64-3 |
| AD1990ACPZRL7 | -40°C to +85°C | 64-Lead Lead Frame Chip Scale Package (LFCSP_VQ), 7” Tape and Reel | CP-64-3 |
| EVAL-AD1990EB | Evaluation Board |