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Series voltage references

REF3440

ACTIVE

4.1-V, low-drift, low-power, small-footprint series voltage reference

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Data sheet

REF3440

ACTIVE
Data sheet Order now

Product details

VO (V) 4.096 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 6 Vin (Min) (V) 4.15 Vin (Max) (V) 12 Iq (Typ) (uA) 72 Rating Catalog Features Enable pin, 4-wire output Iout/Iz (Max) (mA) 10 Operating temperature range (C) -40 to 125 Shutdown current (ISD) (Typ) (uA) 2.5
VO (V) 4.096 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 6 Vin (Min) (V) 4.15 Vin (Max) (V) 12 Iq (Typ) (uA) 72 Rating Catalog Features Enable pin, 4-wire output Iout/Iz (Max) (mA) 10 Operating temperature range (C) -40 to 125 Shutdown current (ISD) (Typ) (uA) 2.5
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SOT-23 (DBV) 6 5 mm² 2.9 x 1.6
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  • Initial accuracy: ±0.05% (maximum)
  • Temperature coefficient : 6 ppm/°C (maximum)
  • Operating temperature range: −40°C to +125°C
  • Output current: ±10 mA
  • Low quiescent current: 95 µA (maximum)
  • Ultra-low zero load dropout voltage: 100 mV (maximum)
  • Wide input voltage: 12 V
  • Output 1/f noise (0.1 Hz to 10 Hz): 3.8 µVp-p/V
  • Excellent long-term stability 25 ppm/1000 hrs
  • Multiple small footprint 6 pin SOT-23 package pinouts: REF34xx and REF34xxT
  • Initial accuracy: ±0.05% (maximum)
  • Temperature coefficient : 6 ppm/°C (maximum)
  • Operating temperature range: −40°C to +125°C
  • Output current: ±10 mA
  • Low quiescent current: 95 µA (maximum)
  • Ultra-low zero load dropout voltage: 100 mV (maximum)
  • Wide input voltage: 12 V
  • Output 1/f noise (0.1 Hz to 10 Hz): 3.8 µVp-p/V
  • Excellent long-term stability 25 ppm/1000 hrs
  • Multiple small footprint 6 pin SOT-23 package pinouts: REF34xx and REF34xxT
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The REF34xx device is a low temperature drift (6 ppm/°C), low-power, high-precision CMOS voltage reference, featuring ±0.05% initial accuracy, low operating current with power consumption less than 95 µA. This device also offers very low output noise of 3.8 µVp-p /V, which enables its ability to maintain high signal integrity with high-resolution data converters in noise critical systems. With a small SOT-23 package, REF34xx offers enhanced specifications and pin-to-pin replacement for MAX607x, ADR34xx and LT1790 (REF34xxT, no EN pin). The REF34xx family is compatible to most of the ADC and DAC such as ADS1287, DAC8802 and ADS1112.

Stability and system reliability are further improved by the low output-voltage hysteresis of the device and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 µA) benefit portable and battery-powered applications.

REF34xx is specified for the wide temperature range of −40°C to +125°C.

The REF34xx device is a low temperature drift (6 ppm/°C), low-power, high-precision CMOS voltage reference, featuring ±0.05% initial accuracy, low operating current with power consumption less than 95 µA. This device also offers very low output noise of 3.8 µVp-p /V, which enables its ability to maintain high signal integrity with high-resolution data converters in noise critical systems. With a small SOT-23 package, REF34xx offers enhanced specifications and pin-to-pin replacement for MAX607x, ADR34xx and LT1790 (REF34xxT, no EN pin). The REF34xx family is compatible to most of the ADC and DAC such as ADS1287, DAC8802 and ADS1112.

Stability and system reliability are further improved by the low output-voltage hysteresis of the device and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 µA) benefit portable and battery-powered applications.

REF34xx is specified for the wide temperature range of −40°C to +125°C.

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Technical documentation

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Type Title Date
* Data sheet REF34xx Low-Drift, Low-Power, Small-Footprint Series Voltage Reference datasheet (Rev. F) 10 May 2021
Application note Voltage Reference Solutions in Motor Control Drives 29 Jul 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Application note Choosing the Right Voltage Reference for Your Automotive Application 17 Jul 2018

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SOT-23 (DBV) 6 View options

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