OPA2145数据手册TI中文资料规格书

描述 Description

The OPA145 and OPA2145 (OPAx145) devices are part of a family of low-power JFET input amplifier that have excellent drift, low current noise, and pico-ampere input bias current. These features make the OPAx145 an excellent choice for amplifying small signals from high-impedance sensors.

The rail-to-rail output swing interfaces to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.

特性 Features

• Best bandwidth and slew-rate-to-power ratio:
• gain-bandwidth product: 5.5 MHz
• Slew rate: 20 V/µs
• Low supply current: 475 µA (maximum)

• High precision:
• Very low offset: 150 µV (maximum)
• Very low offset drift: 1 µV/°C (maximum)

• Low input bias current: 2 pA
• Excellent noise performance:
• Very low voltage noise: 7 nV/√Hz
• Very low current noise: 0.8 fA/√ Hz

• Input-voltage range includes V– supply
• Single-supply operation: 4.5 V to 36 V
• Dual-supply operation: ±2.25 V to ±18 V