参数资料
型号: LTC5100EUF#TR
厂商: Linear Technology
文件页数: 45/52页
文件大小: 0K
描述: IC DRIVER VCSEL 3.2GBPS 16QFN
标准包装: 2,500
类型: 激光二极管驱动器
数据速率: 3.2Gbps
通道数: 1
电源电压: 3.135 V ~ 3.465 V
电流 - 电源: 54mA
电流 - 调制: 12mA
工作温度: -40°C ~ 85°C
封装/外壳: 16-WQFN 裸露焊盘
供应商设备封装: 16-QFN(4x4)
包装: 带卷 (TR)
安装类型: 表面贴装
LTC5100
REGISTER DEFI ITIO S
Table 26. Register: IM_ADC—Modulation Current ADC (I 2 C Command Code 0x06)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Im_adc
BIT
15:10
9
8
7
6
5
4
(BIN)
0
0
0
0
0
0
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:
3
2
0
0
I M =
ADC_code
1024
? (Im_ rng + 1 ) ? 9 mA ( typical )
1
0
0
0
Table 27. Register: IS_ADC (IMD_ADC)—Source Current/Monitor Diode Current ADC (I 2 C Command Code 0x07)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Is_adc
(.Imd_adc in
APC Mode)
BIT
15:10
9
8
7
6
(BIN)
0
0
0
0
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:
5
4
0
0
I S =
ADC_code
1024
? ( Is _ rng + 1 ) ? 9 mA ( typical )
3
2
0
0
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:
?
1
0
0
0
?
I MD = 4 . 25 μ A ? 4 Imd_rng ? exp ? In ( 8 ) ?
?
ADC _ code ?
?
1024
Table 28. Register: IS_DAC—Souce Current DAC (I 2 C Command Code 0x01)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Is_dac
BIT
15:10
9
8
(BIN)
0
0
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.
7
6
0
0
I S =
Is_dac
1024
? ( Is _ rng + 1 ) ? 9 mA ( typical )
5
4
3
2
1
0
0
0
0
0
0
0
sn5100 5100fs
45
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