参数资料
型号: DS1874T+T&R
厂商: Maxim Integrated
文件页数: 87/88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: 2,500
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: 带卷 (TR)
安装类型: 表面贴装
其它名称: 90-1874T+TRL
SFP+ Controller with Digital LDD Interface
Table 08h Register Descriptions
Table 08h, Register 80h–A3h: DAC2 LUT
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL78) or (PW1 and RTBL78)
PW2 or (PW1 and RWTBL78)
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 DAC2 LUT is set of registers assigned to hold the PWM profile for DAC2. The values in this table determine
the set point for DAC2. 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 08h. Register 80h defines the
-40°C to -36°C DAC2 value, Register 81h defines -36°C to -32°C DAC2 value, and so on. Values recalled from
this EEPROM memory table are written into the DAC2 VALUE (Table 02h, Registers 86h –87h) location that holds
the value until the next temperature conversion. The DS1874 can be placed into a manual mode (DAC2 EN bit,
Table 02h, Register 80h), where DAC2 can be directly controlled for calibration. If temperature compensation is
not required by the application, program the entire LUT to the desired DAC2 set point.
Table 08h, Register A4h–A7h: RESERVED
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL78) or (PW1 and RTBL78)
PW2 or (PW1 and RWTBL78)
Nonvolatile (EE)
These registers are reserved.
Auxiliary Memory A0h Register Descriptions
Auxiliary Memory A0h, Register 00h–FFh: EEPROM
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and WAUXA) or (PW1 and WAUXAU)
PW2 or (PW1 and WAUXA)
Nonvolatile (EE)
00h –FFh
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
Accessible with the slave address A0h.
BIT 0
______________________________________________________________________________________
87
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