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参数资料
| 型号： | DS1862AB+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA25 |
| 封装： | 5 X 5 MM, ROHS COMPLIANT, CSBGA-25 |
| 文件页数： | 8/42页 |
| 文件大小： | 586K |
| 代理商： | DS1862AB+ |
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DS1862A
XFP Laser Control and Digital Diagnostic IC
16
______________________________________________________________________________________
If the largest current range is selected, the maximum
value of FFh (from LUT) corresponds to a 1200μA sink
current. Regardless of the current range, the MODSET
value always consists of 256 steps, including zero.
IMODSET can be controlled automatically with the tem-
perature-based lookup table, or by three other manual
methods.
Automatic temperature addressed lookup is accom-
plished by an internal or external temperature sensor
controlling an address pointer. This pointer indexes
through 127 previously loaded 8-bit current values
stored in the LUT. Each one of the 127 temperature
slot locations corresponds to a 2°C increment over
the -40°C to +102°C temperature range. Any tempera-
ture above or below these points causes the code in
the first or last temperature slot to be indexed. Both the
internal temperature sensor and an external sensor
connected to AUX2MON are capable of providing a
signal to control the extinction ratio automatically with
an indexed LUT. Table 2 illustrates the relationship
between the temperature and the memory locations in
the LUT.
Automatic and manual control of MODSET is controlled
by two bits, TEN and AEN, that reside in Table 04h,
Byte B2h. By default (from factory) TEN and AEN are
both set, causing complete automatic temperature-
based lookup. If TEN and/or AEN are altered, the
DS1862A is set to one of the manual modes. Table 3
describes manual mode functionality.
Table 2. Temperature Lookup Table
TEMPERATURE (°C)
CORRESPONDING LOOKUP
TABLE ADDRESS
< -40
80h
-40
80h
-38
81h
-36
82h
…
+96
C4h
+98
C5h
+100
C6h
+102
C7h
> +102
C7h
Table 3. Truth Table for TEN and AEN Bits
TEN
AEN
DS1862A LUT FUNCTIONALITY
0
Manual mode that allows users to write a
value directly to the LUT VALUE register
(Table 04h, Byte B1h) to drive MODSET. While
in this mode, the LUT INDEX POINTER register
is not being updated, and no longer drives the
LUT VALUE register.
0
1
Manual mode that allows users to write a
value directly to the LUT VALUE register
(Table 04h, Byte B1h) to drive MODSET. While
in this mode, the LUT INDEX POINTER register
is still being updated; however, it no longer
drives the LUT VALUE register.
1
0
Manual mode that allows users to write a
value to the LUT INDEX POINTER register
(Table 04h, Byte B0), then the DS1862A
updates the LUT VALUE register (Table 04h,
Byte B1h) based on the user’s index pointer.
1
Automatic mode (factory default). This mode
automatically indexes the LUT based on
temperature, placing the resulting LUT
address in the LUT INDEX POINTER register
(Table 04h, Byte B0h). Then the MODSET
setting is transferred from that LUT address to
the LUT VALUE register (Table 04h, Byte B1h).
Lastly, the IMODSET is set to the new MODSET
code.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1862AB+ | 功能描述:激光驱动器 XFP Laser Control & Digital Diagnostic RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| DS1862AB+T&R | 制造商:Maxim Integrated Products 功能描述:XFP LASER CONTROL 25CSBGA - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LASR CTRLR 7CHAN 5.5V 25CSBGA |
| DS1862AB+T&R | 功能描述:激光驱动器 XFP Laser Control & Digital Diagnostic RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| DS1862AB+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:XFP Laser Control and Digital Diagnostic IC |
| DS1862B | 功能描述:激光驱动器 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
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