LTC5100EUF#TRPBF Linear Technology, LTC5100EUF#TRPBF Datasheet - Page 39

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

Specifications of LTC5100EUF#TRPBF

• 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

Table 16. Register: IM_TC1—Laser Modulation Current First Order Temperature Coefficient (I
REGISTER
Table 17. Register: IM_TC2—Laser Modulation Current Second Order Temperature Coefficient (I
REGISTER
Table 18. Register: T_EXT—External Temperature (I
REGISTER
REGISTER DEFI ITIO S
.BITFIELD
.Reserved
.Im_tc1
.BITFIELD
.Reserved
.Im_tc2
.BITFIELD
.Reserved
.T_ext
15:10
15:8
15:8
BIT
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
RESET VALUE
RESET VALUE
RESET VALUE
U
(BIN)
(BIN)
(BIN)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
U
FUNCTION AND VALUES
First Order Temperature Coefficient for Modulation Current
This Bit Field is a Signed 8-Bit, Two’s Complement Integer. Thus its Value Ranges from –128 to 127.
Im_tc1 Sets the First Order Temperature Coefficient for the Modulation Current. The Nominal Scaling
is 2
FUNCTION AND VALUES
Second Order Temperature Coefficient for Modulation Current
This Bit Field is a Signed 8-Bit, Two’s Complement Integer. Thus its Value Ranges from –128 to 127.
Im_tc2 Sets the Second Order Temperature Coefficient for the Laser Bias Current. The Nominal
Scaling is 2
FUNCTION AND VALUES
Externally Supplied Temperature for Temperature Compensation Calculations (Unsigned 10-Bit
Integer)
By Convention the Scaling of T_ext is 512K or 239 C Full Scale, Corresponding to 0.5 C/LSB.
However, Any Scaling is Permissible as Long as the Temperature Compensation Coefficients are Also
Appropriately Scaled.
T_ext = (T + 273 C)/0.5 C, Where T is the External Temperature in Degrees Celsius.
–13
/ C or 122ppm/ C per LSB.
2
C Command Code 0x0D)
–18
/ C
2
or 3.81ppm/ C
2
per LSB.
2
C Command Code 0x1A)
2
C Command Code 0x1B)
LTC5100
sn5100 5100fs
39