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Low Noise Negative Bias Generator

US ECCN: EAR99 US/Local Export Classification Number


Quality information

RoHS Yes
Lead finish / Ball material SN
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
VSSOP (DGK) | 8 250 | SMALL T&R -40 to 125
Package | Pins VSSOP (DGK) | 8
Package qty | Carrier: 250 | SMALL T&R
Operating temperature range (°C) -40 to 125
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Features for the LM7705

  • Regulated Output Voltage −0.232 V
  • Output Voltage Tolerance 5%
  • Output Voltage Ripple 4 mVPP
  • 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

Description for the LM7705

The LM7705 device is a switched capacitor voltage inverter with a low noise, −0.23 Vfixed negative voltage regulator. This device is designed to be used with low voltage amplifiers toenable the amplifiers output to swing to zero volts. The −0.23 V is used to supply the negativesupply pin of an amplifier while maintaining less then 5.5 V across the amplifier. Rail-to-Railoutput amplifiers cannot output zero volts when operating from a single-supply voltage and canresult in error accumulation due to amplifier output saturation voltage being amplified byfollowing gain stages. A small negative supply voltage will prevent the amplifiers output fromsaturating 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 azero voltage signal and the full input range of an ADC can be used. The LM7705 device has ashutdown pin to minimize standby power consumption.


Qty Price (USD)
1-99 0.682
100-249 0.524
250-999 0.386
1,000+ 0.276