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Low Noise Negative Bias Generator


Package | PIN: DGK | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $0.82
10-24 $0.73
25-99 $0.68
100-249 $0.58
250-499 $0.53
500-749 $0.44
750-999 $0.35
1000+ $0.31


  • 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

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Texas Instruments  LM7705MME/NOPB

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.