LM7705 - 低噪声负偏置发生器

LM7705是TI德州仪器公司的一款电荷泵（无感应器）产品，LM7705是低噪声负偏置发生器，本站介绍了LM7705的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

产品应用

True Zero Amplifier Outputs
Portable Instrumentation
Low-Voltage Split-Power Supplies

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM7705	VSSOP (8)	3.00 mm × 3.00 mm

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