LTC5100EUF#PBF Linear Technology, LTC5100EUF#PBF Datasheet - Page 45

• 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

Table 26. Register: IM_ADC—Modulation Current ADC (I
REGISTER
Table 27. Register: IS_ADC (IMD_ADC)—Source Current/Monitor Diode Current ADC (I
REGISTER
Table 28. Register: IS_DAC—Souce Current DAC (I
REGISTER
REGISTER DEFI ITIO S
.BITFIELD
.Reserved
.Im_adc
.BITFIELD
.Reserved
.Is_adc
(.Imd_adc in
APC Mode)
.BITFIELD
.Reserved
.Is_dac
15:10
15:10
15:10
BIT
BIT
BIT
9
8
7
6
5
4
3
2
1
0
9
8
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
0
0
0
0
U
FUNCTION AND VALUES
ADC Reading of the Modulation Current (10-Bit Unsigned Integer)
Im_adc Contains the Last ADC Conversion of the Average Modulation Current Delivered at the MODA
and MODB Pins. (The MODA and MODB Pins are Tied Together On-Chip.) The Peak-to-Peak Current
s Twice the Average Current for a Data Stream with 50% Duty Cycle. The Modulation Current
Reaching the Laser Depends on its Resistance Relative to the Termination Resistor.
The Average Physical Current at the MODA and MODB Pins is Given By:
FUNCTION AND VALUES
ADC Reading of the SRC Pin Current or Monitor Diode Current
This Bit Field Has Different Functions Depending on Apc_en.
Constant Current Control (CCC) Mode (Apc_en = 0): Is_adc Contains the Last ADC Conversion of
the SRC Pin Current. The Physical SRC Pin Current is Given By:
Automatic Power Control (APC) Mode (Apc_en = 1): Imd_adc Contains the Last ADC Conversion of
the Monitor Diode Current. The Physical Monitor Diode Current is Given By:
FUNCTION AND VALUES
DAC Setting for the Source Current (the SRC Pin Current)
Read Access to This DAC is Always Available. Write Access is Only Valid if LPC_en = 0.
I =
I =
S
I =
I
M
S
MD
2
Is_dac
ADC_code
C Command Code 0x01)
1024
ADC_code
=
4 25
1024
1024
.
2
C Command Code 0x06)
• ( _
A • 4
Is rng
• ( _
• (Im_
Imd_rng
Is rng
rng
1 9
)•
• exp
mA typical
1 9
)•
1 9
)•
In
(
mA typical
( )•
8
mA typical
(
ADC code
(
)
1024
_
)
2
)
C Command Code 0x07)
LTC5100
sn5100 5100fs
45