LM7705是TI公司的一款电荷泵（无感应器）产品，LM7705是低噪声负偏置发生器，本页介绍了LM7705的产品说明、应用、特性等，并给出了与LM7705相关的TI元器件型号供参考。
LM7705 - 低噪声负偏置发生器 - 电荷泵（无感应器） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
- Regulated Output Voltage −0.232 V
- Output Voltage Tolerance 5%
- Output Voltage Ripple 4 mVPP
- Maximum Output Current 26 mA
- Supply Voltage 3 V to 5.25 V
- Conversion Efficiency Up to 98%
- Quiescent Current 78 µA
- Shutdown Current 20 nA
- Turnon Time 500 µs
- Operating Temperature Range −40°C to 125°C
- 8-Pin VSSOP Package
- True Zero Amplifier Outputs
- Portable Instrumentation
- Low-Voltage Split-Power Supplies
The LM7705 device is a switched capacitor voltage inverter with a low noise, −0.23 V fixed negative voltage regulator. This device is designed to be used with low voltage amplifiers to enable the amplifiers output to swing to zero volts. The −0.23 V is used to supply the negative supply pin of an amplifier while maintaining less then 5.5 V across the amplifier. Rail-to-Rail output amplifiers cannot output zero volts when operating from a single-supply voltage and can result in error accumulation due to amplifier output saturation voltage being amplified by following gain stages. A small negative supply voltage will prevent the amplifiers output from saturating at zero volts and will help maintain an accurate zero through a signal processing chain. Additionally, when an amplifier is used to drive an input of the ADC, the amplifier can output a zero voltage signal and the full input range of an ADC can be used. The LM7705 device has a shutdown pin to minimize standby power consumption.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM7705 | VSSOP (8) | 3.00 mm × 3.00 mm |
