参数资料
型号: DS1874T+
厂商: Maxim Integrated
文件页数: 85/88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 06h Register Descriptions
Table 06h, Register 80h–A3h: APC LUT
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (EE)
80h –A3h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
The APC LUT is a set of registers assigned to hold the temperature profile for the APC reference DAC. The
values in this table combined with the APC bits in the COMP RANGING register (Table 02h, Register B9h)
determine the set point for the APC loop. The temperature measurement is used to index the LUT (TINDEX, Table
02h, Register 81h) in 4°C increments from -40°C to +100°C, starting at Register 80h in Table 06h. Register 80h
defines the -40°C to -36°C APC reference value, Register 81h defines the -36°C to -32°C APC reference value,
and so on. Values recalled from this EEPROM memory table are written into the APC DAC (Table 02h, Register
CDh) location that holds the value until the next temperature conversion. The DS1874 can be placed into a
manual mode (APC EN bit, Table 02h, Register 80h), where the APC DAC can be directly controlled for
calibration. If TE temperature compensation is not required by the application, program the entire LUT to the
desired APC set point.
Table 06h, Register A4h–A7h: RESERVED
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
These registers are reserved.
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (EE)
______________________________________________________________________________________
85
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