ISL58125
Pin Descriptions
PIN NAME
DATA1
DATA1B
DATA2
DATA2B
GND
DIS1
DIS2
VC1
VC2
NC
ERRB
IVOUT1
IVOUT2
RSET
ROVR
PDIN
RBIAS1
RBIAS2
IOUT2
IOUT1
VCC
CAL1B
CAL2B
SLPEN
Thermal Pad
I/O
I
I
I
I
I
I
I
I
O
O
O
I
I
O
O
I
I
I
TYPE
LVDS
LVDS
LVDS
LVDS
Ground
Digital
Digital
Analog
Analog
No Connect
Open drain
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Power
TTL
TTL
TTL
DESCRIPTION
Laser #1 Switching Control
Laser #1 Switching Control
Laser #2 Switching Control
Laser #2 Switching Control
Ground
DIS1 = Low selects IOUT1
DIS2 = Low selects IOUT2
Voltage Controlling Laser #1 Switching Current; 0V to 2V input for 0% to 100%
output
Voltage Controlling Laser #2 Switching Current
No Connect
ERRB = Low when output current is max OR Overheat OR Under Supply Voltage
Calibrate channel with an external trimpot to GND
Adjust the IV amplifier gain
Bandgap derived internal reference
Resistor sets the peak current at which the error pin ERRB is pulled.
Photo Diode input to the IV amplifier
Resistors set bias threshold current. See “Applications Information” on page 8 for
more details.
Laser #2 Current Output
Laser #1 Current Output
Supply Voltage
Samples the laser #1 for APC; Active Low
Samples the laser #2 for APC; Active Low
Enable sleep mode when SLPEN = DISx = Hi
Exposed Thermal Pad should be soldered to GND
NOTE: Pins with the same name are not necessary internally connected together. LDD pins must not be used for connecting
together external components or features.
3
FN6625.1
July 22, 2013
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