四路、低功耗、电流反馈运算放大器 14-TSSOP -40 to 85
The OPA4684 provides a new level of performance in low-power, wideband, current-feedback CFB amplifiers. This CFB_PLUS_ amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. This new architecture provides many of the benefits of a more ideal CFB amplifier while retaining the benefits of very low power operation. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity. Beyond simple high-gain applications, the OPA4684 CFB_PLUS_ amplifier permits the gain setting element to be set with considerable freedom from amplifier bandwidth interaction. This allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power line drivers to meet the demanding requirements of studio cameras and broadcast video.
The output capability of the OPA4684 also sets a new mark in performance for low-power current-feedback amplifiers. Delivering a full ±4VPP swing on ±5V supplies, the OPA4684 also has the output current to support > ±3V swing into 50. This minimal output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation.
The OPA4684s low 6.8mA supply current is precisely trimmed at 25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust design over a wide range of operating conditions.
供电电流 1.7 mA
电路数 4
通道数 4
共模抑制比 51 dB
输入补偿漂移 12.0 µV/K
带宽 250 MHz
转换速率 820 V/μs
增益频宽积 210 MHz
输入补偿电压 1.5 mV
输入偏置电流 5 µA
可用通道 S, D, Q, T
3dB带宽 250 MHz
增益带宽 1.9 GHz
共模抑制比Min 51 dB
安装方式 Surface Mount
引脚数 14
封装 TSSOP-14
封装 TSSOP-14
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
OPA4684IPWT TI 德州仪器 | 当前型号 | 当前型号 |
OPA4684IPWR 德州仪器 | 类似代替 | OPA4684IPWT和OPA4684IPWR的区别 |
OPA4684IPWRG4 德州仪器 | 类似代替 | OPA4684IPWT和OPA4684IPWRG4的区别 |
OPA4684IPWTG4 德州仪器 | 功能相似 | OPA4684IPWT和OPA4684IPWTG4的区别 |