参数资料
型号: DS1874T+
厂商: Maxim Integrated
文件页数: 56/88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: 管件
安装类型: 表面贴装
其它名称: 90-1874T+000
SFP+ Controller with Digital LDD Interface
Table 02h, Register 81h: Temperature Index (TINDEX)
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
(PW2 and AEN = 0) or (PW1 and RWTBL246 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 08h and
C7h, respectively. The calculation of TINDEX is as follows:
TINDEX =
Temp _ Value + 40 ° C
2 ° C
+ 80h
For the temperature-indexed LUTs, 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
0
0
TINDEX 5
TINDEX 6
TINDEX 6
TINDEX 6
TINDEX 4
TINDEX 5
TINDEX 5
TINDEX 5
TINDEX 3
TINDEX 4
TINDEX 4
TINDEX 4
TINDEX 2
TINDEX 3
TINDEX 3
TINDEX 3
TINDEX 1
TINDEX 2
TINDEX 2
TINDEX 2
TINDEX 0
TINDEX 1
TINDEX 1
TINDEX 1
Table 02h, Register 82h–83h: MODULATION REGISTER
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
0000h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
(PW2 and MOD EN = 0) or (PW1 and RWTBL246 and MOD EN = 0)
Volatile
82h
83h
0
2 7
0
2 6
0
2 5
0
2 4
0
2 3
0
2 2
0
2 1
2 8
2 0
BIT 7
BIT 0
The digital value used for MODULATION and recalled from Table 04h at the adjusted memory address found in
TINDEX. This register is updated at the end of the temperature conversion.
56
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