参数资料
型号: DS1873T+
厂商: Maxim Integrated
文件页数: 55/86页
文件大小: 0K
描述: IC CTLR SFP+ ANLG LDD 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
类型: 激光二极管控制器
通道数: 1
电源电压: 2.85 V ~ 3.9 V
电流 - 电源: 2.5mA
工作温度: -40°C ~ 95°C
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 托盘
安装类型: 表面贴装
其它名称: 90-1873T+000
SFP+ Controller with Analog LDD Interface
Table 02h, Register 81h: Temperature Index (TINDEX)
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
(PW2 and AEN = 0) or (PW1 and RWTBL2 and AEN = 0)
Volatile
81h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
Holds the calculated index based on the temperature measurement. This index is used for the address during
lookup of Tables 04h, 06h –08h. Temperature measurements below -40°C or above +102°C are clamped to 80h and
C7h, respectively. The calculation of TINDEX is as follows:
TINDEX =
Temp _ Value + 40 ° C
2 ° C
+ 80h
For the temperature-indexed LUTs (2°C and 4°C), the index used during the lookup function for each table is as follows:
Table 04h (MOD)
Table 06h (APC)
Table 07h (DAC1)
Table 08h (DAC2)
1
1
1
1
TINDEX 6
0
TINDEX 6
0
TINDEX 5
TINDEX 6
TINDEX 5
TINDEX 6
TINDEX 4
TINDEX 5
TINDEX 4
TINDEX 5
TINDEX 3
TINDEX 4
TINDEX 3
TINDEX 4
TINDEX 2
TINDEX 3
TINDEX 2
TINDEX 3
TINDEX 1
TINDEX 2
TINDEX 1
TINDEX 2
TINDEX 0
TINDEX 1
TINDEX 0
TINDEX 1
For the 8-position LUT tables, the following table shows the lookup function:
TINDEX
BYTE
TEMP
(°C)
1000_0xxx
F8
< -8
1001_0xxx
F9
-8 to +8
1001_1xxx
FA
8 to 24
1010_0xxx
FB
24 to 40
1010_1xxx
FC
40 to 56
1011_0xxx
FD
56 to 72
1011_1xxx
FE
72 to 88
11xx_xxxx
FF
88
______________________________________________________________________________________
55
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