LM4050-N, LM4050-N-Q1

www.ti.com

SNOS455E – MAY 2000 – REVISED APRIL 2013

APPLICATIONS INFORMATION

The LM4050-N is a precision micro-power curvature-corrected bandgap shunt voltage reference. For space

critical applications, the LM4050-N is available in the sub-miniature SOT-23 surface-mount package. The

LM4050-N has been designed for stable operation without the need of an external capacitor connected between

the “+” pin and the “

−” pin. If, however, a bypass capacitor is used, the LM4050-N remains stable. Reducing

design effort is the availability of several fixed reverse breakdown voltages: 2.048V, 2.500V, 4.096V, 5.000V,

8.192V, and 10.000V. The minimum operating current increases from 60

μA for the LM4050-N-2.0 to 100 μA for

the LM4050-N-10.0. All versions have a maximum operating current of 15 mA.

LM4050-Ns in the SOT-23 packages have a parasitic Schottky diode between pin 2 (

−) and pin 3 (Die attach

interface contact). Therefore, pin 3 of the SOT-23 package must be left floating or connected to pin 2.

The 4.096V version allows single +5V 12-bit ADCs or DACs to operate with an LSB equal to 1 mV. For 12-bit

ADCs or DACs that operate on supplies of 10V or greater, the 8.192V version gives 2 mV per LSB.

The typical thermal hysteresis specification is defined as the change in +25°C voltage measured after thermal

cycling. The device is thermal cycled to temperature -40°C and then measured at 25°C. Next the device is

25°C measurements is thermal hysteresis. Thermal hysteresis is common in precision references and is induced

by thermal-mechanical package stress. Changes in environmental storage temperature, operating temperature

and board mounting temperature are all factors that can contribute to thermal hysteresis.

(1)

Typical Applications

Figure 12. Shunt Regulator

Copyright © 2000–2013, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Links: LM4050-N LM4050-N-Q1