INA1620 将 4 个高精度匹配薄膜电阻器对和片上 EMI 滤波与一个低失真、高输出电流、双路音频运算放大器集成在一起。该放大器在 1kHz 频率下具有
2.8nV/√Hz 的极低噪声密度和 –119.2dB 的超低 THD+N,能够以 150mW 的输出功率驱动一个 32Ω 的负载。集成式薄膜电阻器的匹配精度在 0.004% 以内,可用于创建大量具有极高性能的音频电路。
INA1620 具有 ±2V 至 ±18V 的极宽电源电压范围,每通道电源电流仅为 2.6mA。INA1620 还具有关断模式,允许放大器从正常运行状态切换至待机状态(待机电流通常小于 5µA)。关断模式经专门设计,可消除进入或退出关断模式时产生的“咔嗒”和“噗噗”噪声。
INA1620 具有独特的内部布局,可将串扰降到最低,即使在过驱动或过载时也不受通道间相互作用的影响。此器件的额定工作温度范围为 –40°C 至 +125°C。
| Number of channels | 2 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 36 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 4 |
| Vos (offset voltage at 25°C) (max) (mV) | 1 |
| GBW (typ) (MHz) | 32 |
| Features | Burr-Brown™ Audio, High Cload Drive, Premium Sound, Shutdown, Small Size |
| Slew rate (typ) (V/µs) | 10 |
| Rail-to-rail | No |
| Offset drift (typ) (µV/°C) | 0.5 |
| Iq per channel (typ) (mA) | 2.6 |
| Vn at 1 kHz (typ) (nV√Hz) | 2.8 |
| CMRR (typ) (dB) | 127 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 2000000 |
| Iout (typ) (A) | 0.145 |
| Architecture | Bipolar |
| Input common mode headroom (to negative supply) (typ) (V) | 1.5 |
| Input common mode headroom (to positive supply) (typ) (V) | -1 |
| Output swing headroom (to negative supply) (typ) (V) | 0.8 |
| Output swing headroom (to positive supply) (typ) (V) | -0.8 |
| THD + N at 1 kHz (typ) (%) | 0.000025 |
| WQFN (RTW) | 24 | 16 mm² 4 x 4 |