LTC5100EUF#PBF Linear Technology, LTC5100EUF#PBF Datasheet - Page 42

• Manufacturer Part Number: LTC5100EUF#PBF
• Description: IC DRIVER VCSEL 3.2GBPS 16QFN
• Manufacturer: Linear Technology
• Type: Laser Diode Driverr

Specifications of LTC5100EUF#PBF

• Data Rate: 3.2Gbps
• Number Of Channels: 1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Current - Supply: 54mA
• Current - Modulation: 12mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-QFN
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC5100
Table 21. Register: FLT_STATUS—Fault Status (I
REGISTER
REGISTER DEFI ITIO S
42
.BITFIELD
.Reserved
.Transmit_ready
.Transmitter_
enabled
.En_pin_state
.Faulted_twice
.Faulted_once
.Faulted
.Under_votlage
Cleared-on-read
.Mem_load_error
Cleared-on-read
.Over_power
Cleared-on-read
.Under_power
Cleared-on-read
.Over_current
Cleared-on-read
15:11
BIT
10
9
8
7
6
5
4
3
2
1
0
RESET VALUE
U
Varies
(BIN)
0
0
0
1
1
0
0
1
0
0
U
FUNCTION AND VALUES
Transmit Ready
Indicates that the Laser Bias and Modulation Currents Have Settled to Within Specification and the
LTC5100 is Ready to Transmit Data. A Fault Clears This Bit.
0: Not Ready, 1: Ready
Transmitter Enabled
Indicates That the Transmitter is Enabled and the Laser Bias and Modulation Currents Are on (Though
Not Necessarily Settled.) The Transmitter is Enabled When the EN pin and Soft_en Bits are Active and
No Faults Have Occurred. A Fault Clears This Bit.
0: Transmitter is Disabled, 1: Transmitter is Enabled.
EN Pin State
Indicates the Logic Level on the EN Pin. The En_polarity Bit Has No Effect on En_pin_state.
The Power-On Reset Value Reflects the State of the EN Pin.
0: EN Pin is Low.
1: EN Pin is High.
Faulted Twice (Only Active When Rep_flt_inhibit is Set)
0: Either No Faults or Only One Fault Has Been Detected.
1: A Second Fault Has Been Detected Within 25ms of Attempting to Clear a First Fault. The Transmitter
is Disabled and Can Only be Re-enabled by Cycling the Power.
Faulted Once (Only Active When Rep_flt_inhibit is Set)
Indicates That a First Fault Has Been Detected. After a Fault Occurs, Faulted_once Will be Set at the
Moment the Transmitter is Disabled (by Setting the EN pin of Soft_en Bit Inactive). If the Transmitter
is Subsequently Re-enabled and a Second Fault Occurs Within 25ms, the Faulted_twice Bit is Set. If
No Fault Occurs Within 25ms, the Faulted_once Bit is Cleared.
0: A First Fault Has Not Been Detected or Has Been Cleared.
1: A First Fault Has Been Detected.
Faulted
0: The LTC5100 is Not in the Faulted State.
1: A Fault Has Occurred and the LTC5100 Has Entered the Faulted State (the Transmitter is Not
Disabled Unless Auto_shutdn_en is Set).
Undervoltage Fault Indicator (Always Enabled)
Indicates That a Power Supply Undervoltage Event Occurred.
0: No Fault, 1: Undervoltage Fault Detected.
The Undervoltage Bit is Always Set at Power Up. Read the FLT_STATUS Register Immediately After
Power-Up to Clear This Bit.
Memory (EEPROM) Load Error Indicator (Always Enabled)
Indicates That an Attempt to Load the Registers from EEPROM Was Started But Did Not Complete
Successfully.
0: No Fault, 1: EEPROM Load Failed.
Laser Overpower Fault Indicator (Enabled by Over_pwr_en)
Indicates That a Laser Overpower Fault Occurred. Overpower Occurs When the Monitor Diode Current
Exceeds its Set Point. An Overpower Fault Can Occur Only in APC Mode.
0: No Fault, 1: Overpower Fault Detected.
Laser Underpower Fault Indicator (Enabled by Under_pwr_en)
Indicates That a Laser Underpower Fault Occurred. Underpower Occurs When the Monitor Diode
Current Falls Below its Set Point. An Underpower Fault Can Occur Only in APC Mode.
0: No Fault, 1: Underpower Fault Detected.
Laser Overcurrent Fault Indicator (Enabled by Over_current_en)
Indicates That the Laser Bias Current Exceeded the Value Set in the IB_LIMIT Register.
0: No Fault, 1: Overcurrent Fault Detected.
2
C Command Code 0x12)
sn5100 5100fs