REF3425, REF3430, REF3433, REF3440, REF3450
REF3425, REF3430, REF3433, REF3440, REF3450
www.ti.com
SBAS804C – SEPTEMBER 2017 – REVISED FEBRUARY 2021
SBAS804C – SEPTEMBER 2017 – REVISED FEBRUARY 2021
REF34xx Low-Drift, Low-Power, Small-Footprint Series Voltage Reference
1 Features
3 Description
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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)
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 6SOT-23 package pinouts:
REF34xx and REF34xxT
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 and ADR34xx. The
REF34xx family is compatible to most of the ADC and
DAC such as ADS1287, ADUCM360, ADS1112.
2 Applications
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) can benefit portable and battery-powered
applications.
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Data acquisition systems
Analog I/O modules
Field transmitters
Lab & field instrumentation
Battery test equipment
DC power supply, AC source, electronic load
Digital multimeters
REF34xx is specified for the wide temperature range
of −40°C to +125°C. Contact the TI sales
representative for additional voltage options.
Device Information
PART NAME
REF34xx
REF34xxT(2)
PACKAGE (1)
BODY SIZE (NOM)
2.90 mm × 1.60 mm
2.90 mm × 1.60 mm
SOT-23 (6)
SOT-23 (6)
(1) For all available packages, see the orderable addendum at
the end of the data sheet
(2) Product Preview
10 ꢀ
10 ꢀ
0.4
0.36
+125°C
0.32
124 ꢀ
-
ADS1287
REF
Input Signal
1 nF
+
0.28
+25°C
-40°C
0.24
VIN
0.2
0.16
0.12
0.08
0.04
0
REF34xx
CIN
1µF
COUT
10 µF
Copyright © 2017, Texas Instruments Incorporated
0
5
Load Current (mA)
10
Simplified Schematic
D001
Dropout vs. Current Load Over Temperature
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
Copyright © 2021 Texas Instruments Incorporated
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intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
Product Folder Links: REF3425 REF3430 REF3433 REF3440 REF3450
1
DATA.