参数资料
| 型号： | DS1873T+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 18/86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 |
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SFP+ Controller with Analog LDD Interface
The RSSI_FF and RSSI_FC bits are used to force fine-
mode or coarse-mode conversions, or to disable the
dual-range functionality. Dual-range functionality is
enabled by default (both RSSI_FC and RSSI_FF are
factory programmed to 0 in EEPROM). It can be dis-
abled by setting RSSI_FC to 0 and RSSI_FF to 1. These
bits are also useful when calibrating MON3. For addi-
tional information, see Figure 18. The dual-range cali-
bration can operate in two modes: crossover enabled
and crossover disabled.
? Crossover Enabled: For systems with nonlinear
relationships between the ADC input and the desired
ADC result, the mode should be set to crossover
enabled. The RSSI measurement of an APD receiver
is one such application. Using the crossover-
tion of the nonlinear response of the APD’s gain fac-
tor. The crossover point is the point between fine and
coarse points. The ADC result transitions between
the fine and coarse ranges with no hysteresis. Right-
shifting, slope adjustment, and offset are config-
urable for both the fine and coarse ranges. See
Figure 7.
? Crossover Disabled: The crossover-disabled mode
is intended for systems with a linear relationship
between the MON3 input and the desired ADC
result. Hysteresis allows for a nonjittery response
when the input is at the crossover boundary of the
fine and coarse ADC. In a nonlinear system, the hys-
teresis could cause significant errors in the ADC
result. See Figure 8.
enabled mode allows a piecewise linear approxima-
RSSI RESULT
CROSSOVER POINT
Figure 7. RSSI with Crossover Enabled
RSSI RESULT
IDEAL RESPONSE
MON3 INPUT
ER
CO
AR
SE
FU
L
L-S
CA
L
ES
PO
NS
E
HT-
FIN
ER
IG
S
HIF
T=
3
HYSTERESIS
MON3 INPUT
FINE
Figure 8. RSSI with Crossover Disabled
COARSE
18
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相关PDF资料 |
PDF描述 |
|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1873T+ | 功能描述:ADC / DAC多通道 SFP+ Ctrl w/Analog RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1873T+T&R | 制造商:Maxim Integrated Products 功能描述:5X5 TQFN SFP+ CTRL W/ANALOG - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTLR SFP+ ANLG LDD 28-TQFN |
| DS1873T+T&R | 功能描述:ADC / DAC多通道 SFP+ Ctrl w/Analog RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1873T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Analog LDD Interface |
| DS1874 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface |
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