1 Features
1• High Initial Accuracy: 0.1%
• Ultra-Low Noise
• Low Temperature Coefficient: 3 ppm/°C (A Grade)
• Low Voltage Operation: 1.8V
• Low Dropout Voltage: 20 mV (Typical) at 1mA
• Supply Current: 230 μA (Typical), ≤ 1 μA Disable
Mode
• Enable Pin
• Output Voltage Options: 1.024 V, 1.25 V, 2.048 V,
2.5 V, and 4.096 V
• Custom Voltages From 0.5 V to 4.5 V
• Temperature Range: 0°C to 70°C

2 Applications
• Portable, Battery-Powered Equipment
• Instrumentation and Test Equipment
• Automotive
• Industrial Process Control
• Data Acquisition Systems
• Medical Equipment
• Precision Scales
• Servo Systems
• Battery Charging

3 Description
The LM4140 series of precision references are
designed to combine high accuracy, low drift, and
noise with low power dissipation in a small package.
The LM4140 is the industry's first reference with
output voltage options lower than the bandgap
voltage.
The key to the advance performance of the LM4140
is the use of EEPROM registers and CMOS DACs for
temperature coefficient curvature correction and
trimming of the output voltage accuracy of the device
during the final production testing.
The major advantage of this method is the much
higher resolution available with DACs than is
available economically with most methods used by
other bandgap references.
The low input and dropout voltage, low supply
current, and output drive capability of the LM4140
makes this product an ideal choice for battery
powered and portable applications.
The LM4140 is available in three grades (A, B, C)
with 0.1% initial accuracy and 3, 6, and 10 ppm/°C
temperature coefficients. For even lower temperature
coefficients, contact Texas Instruments.
The device performance is specified over the
temperature range 0°C to 70°C, and is available in
compact 8-pin package.
For other output voltage options from 0.5 V to 4.5 V,
contact Texas Instruments.