参数资料
型号: DS1873T+
厂商: Maxim Integrated
文件页数: 81/86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 06h, Register F8h–FFh: HBIAS LUT
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL46) or (PW1 and RTBL46)
PW2 or (PW1 and RWTBL46)
Nonvolatile (EE)
F8h –FFh
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
High bias alarm threshold (HBATH) is a digital clamp used to ensure that the DAC setting for BIAS currents does
not exceed a set value. The table below shows the range of temp for each byte ’s location. The table shows a
rising temperature; for a falling temperature there is 1°C of hysteresis.
F8h
F9h
FAh
FBh
FCh
FDh
FEh
FFh
Less than or equal to -8°C
Greater than -8°C up to +8°C
Greater than +8°C up to +24°C
Greater than +24°C up to +40°C
Greater than +40°C up to +56°C
Greater than +56°C up to +72°C
Greater than +72°C up to +88°C
Greater than +88°C
Table 07h Register Descriptions
Table 07h, Register 80h–C7h: DAC1 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 –C7h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
The DAC1 LUT is a set of registers assigned to hold the PWM profile for DAC1. The values in this table
determine the set point for DAC1. The temperature measurement is used to index the LUT (TINDEX, Table 02h,
Register 81h) in 2°C increments from -40°C to +102°C, starting at Register 80h in Table 07h. Register 80h
defines the -40°C to -38°C DAC1 value, Register 81h defines -38°C to -36°C DAC1 value, and so on. Values
recalled from this EEPROM memory table are written into the DAC1 VALUE (Table 02h, Registers 84h –85h)
location, which holds the value until the next temperature conversion. The part can be placed into a manual
mode (DAC1 EN bit, Table 02h, Register 80h), where DAC1 can be directly controlled for calibration. If
temperature compensation is not required by the application, program the entire LUT to the desired DAC1 set
point.
______________________________________________________________________________________
81
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