REF194:  Precision Micropower, Low Dropout, Low Voltage References

The REF19x series precision band gap voltage references use a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve a very low ...More

REF194:  Precision Micropower, Low Dropout, Low Voltage References

Product Description

The REF19x series precision band gap voltage references use a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve a very low temperature coefficient and high initial accuracy.

The REF19x series is made up of micropower, low dropout voltage (LDV) devices, providing stable output voltage from supplies as low as 100 mV above the output voltage and consuming less than 45 μA of supply current. In sleep mode, which is enabled by applying a low TTL or CMOS level to the SLEEP pin, the output is turned off and supply current is further reduced to less than 15 μA.

The REF19x series references are specified over the extended industrial temperature range (−40°C to +85°C) with typical performance specifications over −40°C to +125°C for applications, such as automotive.

All electrical grades are available in an 8-lead SOIC package; the PDIP and TSSOP packages are available only in the lowest electrical grade.

Applications

  • Portable instruments
  • ADCs and DACs
  • Smart sensors
  • Solar powered applications
  • Loop-current-powered instruments

    • Data Sheet, Rev. J, 3/08

    Features

    • Initial Accuracy: ±2 mV Max
    • Temperature Coefficient: 5 ppm/°C Max
    • Low Supply Current: 45 µA Max
    • Sleep Mode: 15 µA Max
    • Low Dropout Voltage
    • Load Regulation: 4 ppm/mA
    • Line Regulation: 4 ppm/V
    • High Output Current: 30 mA
    • Short-Circuit Protection

    Diagrams

    REF194 Diagram
    SOIC/TSSOP Pin Configuration for REF194

    Specifications

    Vout 4.5
    Initial Accuracy (%) 0.044
    Ref Out TC (ppm/C) 2ppm/C
    Supply Voltage Range (V) +4.6 to +15
    Supply Current (max) 45µA
    Ref Output Current (mA) 30mA
    0.1-10 Hz Noise (µV p-p) 45µV p-p
    Temp Range(s) -40 to +85
    Package DIP,SOIC
    Reference Type Series-Low Dropout

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