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REF35-Q1

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Automotive, 650-nA quiescent current, 15-ppm/°C drift, ultra-low-power precision voltage reference

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Data sheet

REF35-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive VO (V) 1.25, 1.6, 1.8, 2.5, 3, 3.3, 5 Temp coeff (max) (ppm/°C) 15 Initial accuracy (max) (%) 0.05 Features Enable pin, Noise-reduction pin, TRIM/NR pin Iout/Iz (max) (mA) 10 Vin (min) (V) 1.7 Vin (max) (V) 6 Iq (typ) (mA) 0.00065 LFN 0.1 to 10 Hz (typ) (µVPP) 8.2 Operating temperature range (°C) -40 to 125
Rating Automotive VO (V) 1.25, 1.6, 1.8, 2.5, 3, 3.3, 5 Temp coeff (max) (ppm/°C) 15 Initial accuracy (max) (%) 0.05 Features Enable pin, Noise-reduction pin, TRIM/NR pin Iout/Iz (max) (mA) 10 Vin (min) (V) 1.7 Vin (max) (V) 6 Iq (typ) (mA) 0.00065 LFN 0.1 to 10 Hz (typ) (µVPP) 8.2 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: −40°C to 125°C ambient operating temperature range
  • Ultra-low quiescent current:
    • 650 nA (typical)
  • Initial accuracy: ±0.05 % (maximum)
  • Temperature coefficient:
    • 15 ppm/°C maximum for −40°C to 125°C
  • Output 1/f noise (0.1 Hz to 10 Hz): 3.3 ppm P-P
  • NR pin to reduce noise
  • EN pin to reduce shutdown current consumption
  • Long-term stability: 30 ppm at 1k hour
  • Specified temperature range: −40°C to +125°C
  • Operating temperature range: −55°C to +125°C
  • Output current: +10 mA, −5 mA
  • Input voltage: V REF + V DO to 6 V
  • Output voltage options:
    • 1.2 V, 1.25 V, 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, 5.0 V
  • Small footprint 6-pin SOT−23 package
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: −40°C to 125°C ambient operating temperature range
  • Ultra-low quiescent current:
    • 650 nA (typical)
  • Initial accuracy: ±0.05 % (maximum)
  • Temperature coefficient:
    • 15 ppm/°C maximum for −40°C to 125°C
  • Output 1/f noise (0.1 Hz to 10 Hz): 3.3 ppm P-P
  • NR pin to reduce noise
  • EN pin to reduce shutdown current consumption
  • Long-term stability: 30 ppm at 1k hour
  • Specified temperature range: −40°C to +125°C
  • Operating temperature range: −55°C to +125°C
  • Output current: +10 mA, −5 mA
  • Input voltage: V REF + V DO to 6 V
  • Output voltage options:
    • 1.2 V, 1.25 V, 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, 5.0 V
  • Small footprint 6-pin SOT−23 package

The REF35-Q1 is a family of nanopower, low-drift, high-precision series reference devices. The REF35-Q1 family features ±0.05 % initial accuracy with typical 650 nA power consumption. The temperature coefficient (15 ppm/ºC) and long-term stability (30 ppm at 1000 hours) of the device can help improve system stability and reliability. The low power consumption combined with high precision specifications are designed for a wide variety of low current applications.

The REF35-Q1 supplies up to 10 mA current with 3.3 ppm p-p noise and 20 ppm/mA load regulation. With this feature set, REF35-Q1 creates a strong low-noise, high accuracy power supply for precision sensors and 12–16b data converters.

The family is fully specified for operation from -40°C to 125°C and is functional over -55°C to 125°C.

The REF35-Q1 is available in wide output voltage variants starting from 1.20 V to 5.0 V. The device is offered in space saving SOT23-6 pin package. Contact the TI sales representative for available voltage options.

The REF35-Q1 is a family of nanopower, low-drift, high-precision series reference devices. The REF35-Q1 family features ±0.05 % initial accuracy with typical 650 nA power consumption. The temperature coefficient (15 ppm/ºC) and long-term stability (30 ppm at 1000 hours) of the device can help improve system stability and reliability. The low power consumption combined with high precision specifications are designed for a wide variety of low current applications.

The REF35-Q1 supplies up to 10 mA current with 3.3 ppm p-p noise and 20 ppm/mA load regulation. With this feature set, REF35-Q1 creates a strong low-noise, high accuracy power supply for precision sensors and 12–16b data converters.

The family is fully specified for operation from -40°C to 125°C and is functional over -55°C to 125°C.

The REF35-Q1 is available in wide output voltage variants starting from 1.20 V to 5.0 V. The device is offered in space saving SOT23-6 pin package. Contact the TI sales representative for available voltage options.
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Technical documentation

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* Data sheet REF35-Q1 Ultra Low-Power, High-Precision Voltage Reference datasheet PDF | HTML Aug 9, 2022
Application note Precision Current Sources and Sinks Using Voltage References (Rev. A) PDF | HTML Apr 15, 2026
Functional safety information REF35-Q1Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML Jul 17, 2024

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

REF35EVM — REF35 evaluation module

The REF35 evaluation module (EVM) is a platform for developing the REF35 ultra-low-power voltage reference. REF35 has a 10-ppm/°C (max) temperature drift and is used primarily as a precision voltage reference for low-power data converters.

 

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ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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