LTC5100EUF#TR Linear Technology, LTC5100EUF#TR Datasheet - Page 43

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

Specifications of LTC5100EUF#TR

• 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: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 22. Register: IB_LIMIT—Laser Bias Current Limit (I
REGISTER
Table 23. Register: USER_ADC—Writing (I
REGISTER
REGISTER DEFI ITIO S
.BITFIELD
.Reserved
.Ib_limit
.BITFIELD
.Reserved
.Adc_src_sel
15:7
15:3
BIT
BIT
6
5
4
3
2
1
0
2
1
0
RESET VALUE
RESET VALUE
U
(BIN)
(BIN)
0
0
0
0
0
0
0
0
0
0
U
2
C Command Code 0x18)
FUNCTION AND VALUES
Laser Bias Current Limit
This Bit Field is an Unsigned 7-Bit Integer
Sets the Detection Level for an Over_current Fault. When the Laser Bias Current Exceeds This Level an
Over_current Fault is Generated (Provided Over_current_en is Set).
The Physical Bias Current Level is Given By:
FUNCTION AND VALUES
ADC Source Select
Selects the Signal to be Converted by the ADC During the User ADC Cycle
User ADC Signal Sources
(Binary)
Signal
Select
I
000
001
010
011
100
101
110
111
B(LIMIT)
Reserved Reserved
Reserved Reserved
=
Signal
Name
V
Ib_limit
V
I
TERM
2
I
MD
I
T
M
LD
C Command Code 0x11)
128
S
• ( _
Description
Source Current (SRC Pin I
Current)
Average Modulation
Current (MODA +MODB
Pin Current)
Laser Diode Voltage
Monitor Diode Current
Temperature
Termination Resistor
Voltage
Is rng
1 9
)•
mA typical
(
)
Scaling
I
V
I
1024]
T( C) = ADC_code • 0.5 C – 273 C
V
S
M
MD
LD
TERM
= ADC_code/1024 • (Is_rng + 1) • 9mA
= ADC_code/1024 • (Im_rng + 1) • 9mA
= 4.25 A • 4
= ADC_code/1024 • 3.5V
= ADC_code/1024 • (Is_rng + 1) • 400mV
lmd_rng
• exp[In(8) • ADC_code/
LTC5100
sn5100 5100fs
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