LTC5100EUFTR Linear Technology, LTC5100EUFTR Datasheet - Page 39
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LTC5100EUFTR
Manufacturer Part Number
LTC5100EUFTR
Description
Manufacturer
Linear Technology
Type
VCSELr
Datasheet
1.LTC5100EUFTR.pdf
(52 pages)
Specifications of LTC5100EUFTR
Number Of Channels
1
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not 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