MSP430

and 125 µA

R

6.81k

1%

GPIO

2.73V

or

2.24V

LMT01-SP

VP

VN

+

COMP_B

Divider

TIMER2

CLOCK

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0

10

20

30

40

50

60

-100

-50

0

50

100

150

200

Temperature (

ƒC)

Average Current

Self Heating at VP-VN=5V

Self Heating at VP-VN=2.15V

C001

15

LMT01-SP

www.ti.com

SNIS205 – JANUARY 2019

Product Folder Links: LMT01-SP

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

Application Information (continued)

Figure 24. Average Current Draw and Self-Heating Over Temperature

8.2 Typical Application

8.2.1 3.3-V System VDD MSP430 Interface - Using Comparator Input

Figure 25. MSP430 Comparator Input Implementation

8.2.1.1 Design Requirements

The design requirements listed in Table 2 are used in the detailed design procedure.

Table 2. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

VDD

3.3 V

VDD minimum

3 V

LMT01-SP VP – VN minimum during conversion

2.15 V

LMT01-SP VP – VN minimum during data transmission

2 V

Noise margin

50-mV minimum

Comparator input current over temperature range of interest

< 1 uA

Resistor tolerance

1%