General - Ladybug LB5900 Series Interface Manual

GENERAL

When using Power Sensors in ATE (Automated Test Equipment) systems, it is often desirable to
employ a direct connection to a microcontroller or other processor. Using USB or other driver
intense connectivity platform can interfere with timing and create startup issues.
LadyBug LB5900 series sensors offer option SPI; the option enables sensor operation through SPI
(Serial Peripheral Interface) or I2C (Inter-Integrated Circuit).
Each interface technology has its own advantages, LadyBug recommends that the user research
these options prior to selecting the interface. LB5900 sensors act as slave devices in both
interface technologies.
Data can be collected rapidly using either interface, please review the sensor specification sheet
for measurement rates. Maximum sensor clock rates for SPI is 1 MHz; I2C is 400 kHz.
Figure 1 - Sensor, Cable & Mounting Bracket
DOC: SPII2CHDWBrief - V2.71 07/25/2017 PAGE 5