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.