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COSINE COS358SR
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- COSINE COS358SR
- Type
- COSINE
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- COSINE
- Electronic Component
- COS358SR
- Electronic Component
- 1
- Package
- SOIC-8
- Electronic Component
- Operational Amplifier
- Electronic Component
- 0.197g
- Electronic Component
- 1
- Electronic Component
- Output
- Features
- Built-in
- Electronic Component
- BM0226493194
- Operating Temperature
- 40℃~+125℃
- Amplifier
- 2
- Output Current
- 45mA
- (SR)
- 1V/us
- Power Supply Voltage
- 2.1V~5.5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
COS358SR 产品概述
COS358SR 是科山芯创（COSINE）推出的一款低功耗、双通道轨到轨输出运算放大器，针对低电压、便携及高阻抗传感前端设计场景进行了优化。器件内置补偿，适合单电源或对称双电源工作，兼顾低噪声与低失调，适用于精密测量与通用放大应用。
一、主要规格亮点
- 放大器数：2 路（双通道）
- 电源电压：单电源 2.1V ~ 5.5V；双电源 ±1.05V ~ ±2.75V；最大电压差 Vdd–Vss：6V
- 输出特性：轨到轨输出，便于在低电压系统中获得更大输出摆幅
- 增益带宽积（GBW）：1.5 MHz，内置补偿，单位增益稳定
- 压摆率（SR）：1 V/µs
- 输入失调电压（Vos）：典型 1 mV，温漂 5 µV/℃
- 输入偏置/失调电流：Ib、Ios 典型 2.5 pA（极低，适合高阻抗来源）
- 输入电压噪声密度：28 nV/√Hz @ 1 kHz
- 共模抑制比（CMRR）：125 dB（典型）
- 静态电流（Iq）：约 85 µA（整器件）
- 输出驱动能力：可达 45 mA（峰值）
- 工作温度范围：-40 ℃ ~ +125 ℃
- 封装：SOIC-8
二、功能与应用场景
COS358SR 以低功耗与良好直流精度为设计核心，适合以下应用：
- 传感器前端放大（热电偶、电阻桥、压电等高阻抗传感器）
- 便携式数据采集与信号调理
- 低功耗精密比较/滤波电路（有源滤波器、积分器）
- ADC 驱动与缓冲（需注意带宽与压摆率限制）
- 工业控制与汽车电子（符合宽温度范围）
三、设计要点与建议
- 供电与去耦：建议在 Vdd 与 Vss 之间靠近器件引脚放置 0.1 µF 陶瓷去耦电容，改善瞬态响应和抑制电源噪声。
- 布局：输入引脚保持短且远离高速开关元件，保证低噪声性能。高阻抗信号源建议在输入端并联防静电保护或滤波电阻。
- 负载能力：器件可提供最多数十毫安驱动，但长期大电流输出会提高功耗与发热，应在设计中考虑热耗散与保护措施。
- 带宽与速率限制：GBW 1.5 MHz 与 SR 1 V/µs 决定了该器件在高速信号或大幅度输出时的限制，适用于低中频率信号处理。
- 稳定性：内置补偿保证单位增益稳定，但在反馈网络中加入大量电容或重负载时需验证相位裕度。
四、器件选型与封装
COS358SR 提供 SOIC-8 封装，便于常规 PCB 装配和双列插装布局。品牌为 COSINE（科山芯创），适合对体积、功耗和成本有平衡要求的通用放大器应用。
总结：COS358SR 在低电压、低功耗和高输入阻抗场景中表现均衡，凭借轨到轨输出与较低的输入偏置电流，非常适合便携式信号调理与传感器接口设计。选型时应关注带宽与压摆率对目标应用的影响，并做好电源去耦与热管理。
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