双路、5.5MHz、高压摆率、低噪声、低功耗、RRO 精密 JFET 运算放大器
| Number of channels (#) | 2 |
| Total supply voltage (Max) (+5V=5, +/-5V=10) | 36 |
| Total supply voltage (Min) (+5V=5, +/-5V=10) | 4.5 |
| Vos (offset voltage @ 25 C) (Max) (mV) | 0.15 |
| GBW (Typ) (MHz) | 5.5 |
| Slew rate (Typ) (V/us) | 20 |
| Rail-to-rail | Out |
| Offset drift (Typ) (uV/C) | 0.4 |
| Iq per channel (Typ) (mA) | 0.445 |
| Vn at 1 kHz (Typ) (nV/rtHz) | 7 |
| CMRR (Typ) (dB) | 140 |
| Rating | Catalog |
| Operating temperature range (C) | -40 to 125 |
| Input bias current (Max) (pA) | 10 |
| Output current (Typ) (mA) | 20 |
| Architecture | FET |
| THD + N @ 1 kHz (Typ) (%) | 0.0001 |
- 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
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.
