REF35-Q1 Ultra Low-Power, High-Precision Voltage Reference

1 Features

• 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 ppmP-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: VREF + VDO 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

2 Applications

• Automotive front camera

• Driver monitoring

• Battery control unit

• Electric power steering

3 Description

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 ppmp-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.

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

REF35xxx-Q1

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-Q1

Connection Diagram

Typical Application Use Cases

REF35-Q1

Current

SENSE

Amplifier Biasing

CSA, INA, DFA etc

REF35-Q1

V

GND

Sensor power supply

Bridge, Thermocouple etc

ADC / DAC

REF35-Q1

REF

VDD

GND

Data Converter power supply

REF35-Q1 Use Case

REF35-Q1

SNAS845 – AUGUST 2023

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. PRODUCTION DATA.