REF35 Ultra Low-Power, High-Precision Voltage Reference

1 Features

• Ultra-low quiescent current:

– 680 nA (typical)

• Initial accuracy: ±0.05% (maximum)

• Temperature coefficient:

– 10 ppm/°C (maximum for −40°C to 125°C)

• NR pin to reduce noise

• EN pin to reduce shutdown current consumption

• Excellent long-term stability: 20 ppm @ 1k hr

• Excellent thermal hysteresis: 20 ppm

• Specified temperature range: −40°C to +125°C

• Operating temperature range: −55°C to +125°C

• Output current: +10 mA, −5 mA

• Output voltage options:

– 1.024 V, 1.2 V, 1.25 V, 1.6 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

2 Applications

• Flow transmitter

• Blood glucose monitor

• Servo drive control module

• Power quality analyzer

• Fault indicator

• Oscilloscope

• Process analytics

3 Description

The REF35 is a family of nanopower, low-drift,

high-precision series reference devices. The REF35

family features high ±0.05 % initial accuracy with

power consumption typically below 700 nA. The low

temperature drift (10 ppm/°C) and long-term drift

(20 ppm @ 1000 hrs) ensures system stability and

reliability. The low power consumption combined with

high precision specifications are suitable for wide

variety of portable and low current applications.

The REF35 supplies up to 10 mA current with 8.5

this feature set, REF35 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

wide temperature is suited for industrial applications.

REF35 is available in wide output voltage variants

starting from 1.024 V to 5.0 V. The device is offered

in space saving SOT23-6 pin package. Contact the TI

sales representative for additional voltage options.

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

REF35xxx

SOT-23 (6)

2.90 mm × 1.60 mm

(1)

For all available voltage variants and packages, see the

orderable addendum at the end of the data sheet.

VIN

EN

0.1 μF

1 μF

GND

GND

GND

GND

GND

NR

VREF

Optional

Input

Output

REF35

Connection Diagram

Typical Application Use Cases

REF35

Current

SENSE

Amplifier Biasing

CSA, INA, DFA etc

REF35

V

GND

Sensor power supply

Bridge, Thermocouple etc

ADC / DAC

REF35

REF

VDD

GND

Data Converter power supply

REF35 Use Case

REF35

SNAS809 – DECEMBER 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.