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。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
INA1620 | WQFN (24) | 4.00mm x 4.00mm |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
GND | 3 | — | Connect to ground |
EN | 16 | I | Shutdown (logic low), enable (logic high) |
IN+ A | 22 | I | Noninverting input, channel A |
IN- A | 21 | I | Inverting input, channel A |
IN+ B | 9 | I | Noninverting input, channel B |
IN- B | 10 | I | Inverting input, channel B |
NC | 4 | — | No internal connection |
NC | 15 | — | No internal connection |
OUT A | 17 | O | Output, channel A |
OUT B | 14 | O | Output, channel B |
R1A | 24 | — | Resistor pair 1, end point A |
R1B | 23 | — | Resistor pair 1, center point |
R1C | 1 | — | Resistor pair 1, end point C |
R2A | 19 | — | Resistor pair 2, end point A |
R2B | 20 | — | Resistor pair 2, center point |
R2C | 18 | — | Resistor pair 2, end point C |
R3A | 12 | — | Resistor pair 3, end point A |
R3B | 11 | — | Resistor pair 3, center point |
R3C | 13 | — | Resistor pair 3, end point C |
R4A | 7 | — | Resistor pair 4, end point A |
R4B | 8 | — | Resistor pair 4, center point |
R4C | 6 | — | Resistor pair 4, end point C |
V+ | 2 | — | Positive (highest) power supply |
V– | 5 | — | Negative (lowest) power supply |
Thermal pad | Exposed thermal die pad on underside; connect thermal die pad to V–. |