LX1970-03 EVAL KIT Microsemi Analog Mixed Signal Group, LX1970-03 EVAL KIT Datasheet - Page 4

• Manufacturer Part Number: LX1970-03 EVAL KIT
• Description: KIT EVAL FOR VISIBLE LT SENSOR
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of LX1970-03 EVAL KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LX1970-03 EVALKIT

LX1970 E
Copyright © 2002
Rev. 1.1a 1/27/05
Pull-down
SNK Pull-
Jumper
SNK Pull-up
Test Point
SRC Adjust
SRC Diode
SRC Fixed
Pull-up
Pull-up
Adjust
Pull-down
Input
Diode
Fixed
GND
VDD
SRC
SRC
SRC
Pull-up
Pull-up
J1
J2
J3
J4
up
GND
VDD
SRC
SNK
VALUATION
Jumper to LED Driver connects LX1990 driver IC & LX1970 to VDD, Jumper to LX1970
only connects VDD to the LX1970 sensor only.
Jumper to SRC open disconnects external divider circuitry from LX1970 SRC pin. Jumper
to DIVIDER connects external divider circuitry to SRC pin.
Shorts or leaves connected the series diode D2 from SRC pull-down path
Jumper to DRIVER connects the SNK output to the ISET input of the LX1990 through a
4.12K resistor. Jumper to SNK Pull-up connects the SNK pin to the SNK Pull-up external
board connection
Allowable Range
5V to GND, fixed
DC voltage or
PWM/Logic signal
5V to GND, fixed
DC voltage or
PWM/Logic signal
5V to GND, fixed
DC voltage or
PWM/Logic signal
5V to GND, fixed
DC voltage or
PWM/Logic signal
Common Ground Reference
VDD Input to LX1970 (2 to 5.5V)
LX1970 SNK output
LX1970 SRC output
Cathode of diode connected to SRC pin
100K rheostat and series 10K resistor to SRC
50K series resistor to SRC
100K rheostat and parallel 1µF capacitor to SNK
2 to 5.5V
0V
B
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OARD
Table 3 – Terminal/Test Point Descriptions
Table 1 – Evaluation Board Terminals
LX1970 power supply if J1 is set to LX1970 only, or LX1970 power
supply and LX1990 and external LED’s power supply if J1 is
connected to LED DRIVER (LED’s will only light if J4 is also in
DRIVER position.
Common ground reference
This diode connection is generally used to shunt SRC output current
This pull-up connection is generally used to set a maximum output
Table 2 – Jumper Explanation
First pull-up connection is generally used to set a minimum output
Second pull-up connection is generally used to set a minimum
output voltage or adjust output transfer slope for SRC pin
when disengaging the sensor in a full manual mode
voltage or adjust output transfer slope for SRC pin
voltage or adjust output transfer slope for SNK pin
Integrated Products
Microsemi
Function
Description
Description
U
SER
G
UIDE
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