Texas Instruments LM4040A Manual

LM4040 Precision Micropower Shunt Voltage Reference

1 Features

• Fixed Output Voltages of 2.048 V, 2.5 V, 3 V,
1
4.096 V, 5 V, 8.192 V, and 10 V
• Tight Output Tolerances and Low Temperature
Coefficient
– Max 0.1%, 100 ppm/°C – A Grade
– Max 0.2%, 100 ppm/°C – B Grade
– Max 0.5%, 100 ppm/°C – C Grade
– Max 1.0%, 150 ppm/°C – D Grade
• Low Output Noise: 35 μV
• Wide Operating Current Range: 45 μA Typ to 15
mA
• Stable With All Capacitive Loads; No Output
Capacitor Required
• Available in Extended Temperature Range: –40°C
to 125°C

2 Applications

• Data-Acquisition Systems
• Power Supplies and Power-Supply Monitors
• Instrumentation and Test Equipment
• Process Controls
• Precision Audio
• Automotive Electronics
• Energy Management
• Battery-Powered Equipment
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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.
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Simplified Schematic
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SLOS456N – JANUARY 2005 – REVISED OCTOBER 2017

3 Description

The LM4040 series of shunt voltage references are
versatile, easy-to-use references that cater to a vast
array of applications. The 2-pin fixed-output device
requires no external capacitors for operation and is
stable with all capacitive loads. Additionally, the
reference offers low dynamic impedance, low noise,
and low temperature coefficient to ensure a stable
output voltage over a wide range of operating
currents and temperatures. The LM4040 uses fuse
and Zener-zap reverse breakdown voltage trim during
wafer sort to offer four output voltage tolerances,
ranging from 0.1% (max) for the A grade to 1% (max)
for the D grade. Thus, a great deal of flexibility is
offered to designers in choosing the best cost-to-
performance ratio for their applications.
Packaged in space-saving SC-70 and SOT-23-3
packages and requiring a minimum current of 45 μA
(typ), the LM4040 also is ideal for portable
applications. The LM4040xI is characterized for
operation over an ambient temperature range of
–40°C to 85°C. The LM4040xQ is characterized for
operation over an ambient temperature range of
–40°C to 125°C.
Device Information
PART NUMBER PACKAGE (PIN)
SOT-23 (3)
LM4040
SC70 (6)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
I + I
Z L
I
L
I
Z
LM4040A, LM4040B
LM4040C, LM4040D
(1)
BODY SIZE (NOM)
2.92 mm × 1.30 mm
2.00 mm × 1.25 mm