AD8642ARMZ: 低功耗、轨到轨输出、精密JFET双路放大器
The AD8641/AD8642/AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer CMOS DACs, ASICs, and other wide output swing devices in single-supply systems. The outputs remain stable with capacitive loads of more than 500 pF.
The AD8641/AD8642/AD8643 are suitable for applications utilizing multichannel boards that require low power to manage heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls.
The AD8641/AD8642/AD8643 are fully specified over the extended industrial temperature range of –40°C to +125°C. The AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free packages. The AD8642 is available in 8-lead MSOP and 8-lead SOIC lead-free packages. The AD8643 is available in 14-lead SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.
AD8641/AD8642/AD8643均为低功耗、精密JFET输入放大器,具有极低的输入偏置电流和轨到轨输出特性。此外还具有近似轨到轨输入与轨到轨输出摆幅能力,因而设计人员可以在单电源系统中缓冲CMOS DAC、ASIC及其它宽输出摆幅器件。当容性负载大于500 pF时,输出仍能保持稳定。
AD8641/AD8642/AD8643适合采用多通道电路板、要求低功耗、便于散热管理的应用。其它应用包括光电二极管、ATE基准电平驱动器、电池管理和工业控制。
AD8641/AD8642/AD8643的额定温度范围为-40°C至+125°C扩展工业温度范围。AD8641提供5引脚SC70和8引脚SOIC无铅封装。AD8642提供8引脚MSOP和8引脚SOIC无铅封装。AD8643提供14引脚SOIC和3 mm × 3 mm、16引脚LFCSP无铅封装。
产品应用领域 Applications
- Line-/battery-powered instruments
- Photodiode amplifiers
- Precision current sensing
- Medical instrumentation
- Industrial controls
- Precision filters
- Portable audio
- ATE
- 线路/电池供电仪表
- 光电二极管放大器
- 精密电流检测
- 医疗仪器
- 工业控制
- 精密滤波器
- 便携式音频
- 自动测试设备
AD8642ARMZ 特点
- Low Supply Current: 250 µA max
- Very Low Input Bias Current: 1 pA max
- Low Offset Voltage: 750 µV max
- Single-supply Operation: 5 V to 26 V
- Dual-supply Operation: ±2.5 V to ±13 V
- Rail-to-rail Output
- Unity Gain Stable
- No Phase Reversal
- SC70 Package
- 低电源电流：250 µA(最大值)
- 极低输入偏置电流：1 pA(最大值)
- 低失调电压：750 µV(最大值)
- 单电源供电：5 V至26 V
- 双电源供电：± 2.5 V至± 13 V
- 轨到轨输出
- 单位增益稳定
- 无反相
AD8642ARMZ 功能框图
AD8642ARMZ 技术指标
| -3dB Bandwidth | 3.5MHz | Vcc-Vee Supply (V) | 5 to 26 |
| Slew Rate | 3V/µs | Iq per Amplifier | 290µA |
| Vos | 50µV | # OpAmps per Pkg | 2 |
| Ib | 0.25pA | Operating Temp Range | -40 to +125 |
| Input Noise (nV/rtHz) | 27.5nV/rtHz | Packages | SOIC,SOP |
AD8642 订购指南
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD8642ARMZ | 量产 | 8 | 工业 | |
| AD8642ARMZ-REEL | 量产 | 8 ld MSOP | 8 | 工业 |
| AD8642ARZ | 量产 | 8 ld SOIC | 8 | 工业 |
| AD8642ARZ-REEL | 量产 | 8 ld SOIC | 8 | 工业 |
| AD8642ARZ-REEL7 | 量产 | 8 ld SOIC | 8 | 工业 |
