SNVS475E – NOVEMBER 2006 – REVISED APRIL 2013
LM4128/LM4128Q SOT-23 Precision Micropower Series Voltage Reference
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FEATURES
Output Voltage Initial Accuracy 0.1%
Low Temperature Coefficient 75 ppm/°C
Low Supply Current, 60 µA
Enable Pin Allowing a 3 µA Shutdown Mode
Up to 20 mA Output Current
Voltage Options 1.8V, 2.048V, 2.5V, 3.0V, 3.3V,
4.096V
Custom Voltage Options Available (1.8V to
4.096V)
V
IN
Range of V
REF
+ 400 mV to 5.5V @10 mA
Stable with Low ESR Ceramic Capacitors
5-Pin SOT-23 Package
−40°C
to 125°C Junction Temperature Range
LM4128AQ/BQ/CQ/DQ are AEC-Q100 Grade 1
Qualified and are Manufactured on an
Automotive Grade Flow
DESCRIPTION
Ideal for space critical applications, the LM4128
precision voltage reference is available in the SOT-23
surface-mount package. The LM4128’s advanced
design eliminates the need for an external stabilizing
capacitor while ensuring stability with capacitive loads
up to 10 µF, thus making the LM4128 easy to use.
Series references provide lower power consumption
than shunt references, since they do not have to idle
the maximum possible load current under no load
conditions. This advantage, the low quiescent current
(60 µA), and the low dropout voltage (400 mV) make
the LM4128 ideal for battery-powered solutions.
The LM4128 is available in four grades (A, B, C, and
D) for greater flexibility. The best grade devices (A)
have an initial accuracy of 0.1% with ensured
temperature coefficient of 75 ppm/°C or less, while
the lowest grade parts (D) have an initial accuracy of
1.0% and a tempco of 100 ppm/°C.
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Typical Application Circuit
APPLICATIONS
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Instrumentation & Process Control
Test Equipment
Data Acquisition Systems
Base Stations
Servo Systems
Portable, Battery Powered Equipment
Automotive & Industrial Electronics
Precision Regulators
Battery Chargers
Communications
Medical Equipment
Input
C
IN
*
VIN
VREF
C
OUT
*
Output
LM4128
Enable
EN
GND
*Note: The capacitor C
IN
is required and
the capacitor C
OUT
is optional.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright © 2006–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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