LTC5100 datasheet(5/52 Pages) LINER

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LTC5100

sn5100 5100fs

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C; VDD = VDD(HS) = 3.3V, IS = 24mA; IM = 12mA (IMPP = 24mA); 49.9Ω, 1%

resistor from SRC (Pin 14) to MODA (Pin 11); 50

Ω, 1% load AC coupled to MODB (Pin 10); 10nF, 10% capacitor from SRC (Pin 14) to

VSS; Cml_en = 0, Lpc_en = 1, transmitter enabled, unless otherwise noted. Test circuit in Figure 5.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Bias Current Limit, IB(LIMIT)

Set Point Resolution

Bits

Set Point Range

Is_rng = 0

Is_rng = 1

Is_rng = 2

Is_rng = 3

Optical Power Limit

Automatic Power Control Mode Only, Apc_en = 1

Overpower Limit

Expressed in % Over the Imd Set Point

Underpower Limit

Expressed in % Under the Imd Set Point

–50

Safety Shutdown Response Time

Time from the Fault Occurance to Reduction of

100

µs

the Laser Bias Current to 10% of Nominal

FAULT Output, Open-Drain Mode, Flt_drv_mode = 0

Output Low Voltage

IOL = 3.3mA

0.4

Output High Leakage Current

VFAULT = 2.4V

µA

FAULT Output, Open-Drain Mode with 330

µA Internal Pull Up, Flt_drv_mode = 1

Output Low Voltage

IOL = 3.3mA

0.4

Output High Current

VFAULT = 2.4V

–280

µA

FAULT Output, Open-Drain Mode with 500

µA Internal Pull Up, Flt_drv_mode = 2

Output Low Voltage

IOL = 3.3mA

0.4

Output High Current

VFAULT = 2.4V

–425

µA

FAULT Output, Complementary Drive Mode, Flt_drv_mode = 3

Output High Voltage

IOH = –3.3mA

2.4

Output Low Voltage

IOL = 3.3mA

0.4

EN Input, Ib_gain or (Apc_gain in APC Mode) = 16, Im_gain = 4, Is_rng = 0, Im_rng = 0

Input Low Voltage

0.8

Input High Voltage

Input Low Current

En_polarity = 0 (EN Active Low), VEN = 0V

–10

µA

Input High Current

En_polarity = 0 (EN Active Low), VEN = VDD

–10 to 10

µA

Input Low Current

En_polarity = 1 (EN Active High), VEN = 0V

–10 to 10

µA

Input High Current

En_polarity = 1 (EN Active High), VEN = VDD

µA

Transmit Enable Time

Time from Active Transition on EN to 95% of

100

Nominal Laser Power and 95% of Full Modulation.

First Time Transmission is Enabled After Power

On or with Rapid_restart_en = 0

Transmit Re-Enable Time

Time from Active Transition on EN to 95% of

Nominal Laser Power and 95% of Full Modulation.

When Transmission is Re-Enabled After the First

Time and with Rapid_restart_en = 1

Transmit Disable Time

Time from Inactive Transition on EN to 5% of

µs

Nominal Laser Power

Minimum Pulse Width Required to Clear

µs

a Latched Fault

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