参数资料
| 型号： | DS1863K |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/62页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR DS1863 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 电信，无源光学网络（PON） |
| 已用 IC / 零件： | DS1863 |
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Burst-Mode PON Controller
With Integrated Monitoring
APC LOOP/QUICK TRIP SAMPLE TIMING
BEN
t FIRST
BIAS DAC
CODE
LAST BURST'S
BIAS SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
BIAS
SAMPLE
t REP
QUICK-TRIP
SAMPLE TIMES
Figure 3. APC/Quick-Trip Alarm Sample Timing.
H/LTXP
SAMPLE
HBIAS
SAMPLE
Monitors And Fault Detection
Monitors
Monitoring functions on the DS1863 include four quick-
trip comparators and five ADC channels
This monitoring combined with the interrupt masks
determines when/if the DS1863 shuts down its outputs
and triggers the TX-F and FETG outputs. All of the mon-
itoring levels and interrupt masks are user programma-
ble with the exception of POA, which trips at a fixed
range and is non-maskable for safety reasons.
Four Quick-Trip Monitors And Alarms
Four quick-trip monitors are provided to detect potential
laser safety issues. These monitor
1) High Bias Current (HBIAS)
2) Low Transmit Power (LTXP)
3) High Transmit Power (HTXP)
4) Max Output Current (MAX IBIAS)
quick-trip alarm levels and masks are programmable
through the I 2 C interface.
Five ADC Monitors And Alarms
The ADC monitors five channels that measure tempera-
ture (internal temp sensor), V CC , MON1, MON2, and
MON3 using an analog multiplexer to measure them
round robin with a single ADC. Each channel has a
customer programmable full scale range and offset
value that will be factory programmed to default value
(see below). Additionally, MON1, MON2, and MON3
have the ability to right shift results by up to 7 bits
before the results are compared to alarm thresholds or
read over the I 2 C bus. This allows customers with spec-
ified ADC ranges to calibrate the ADC full scale to a
factor of 1/2 n of their specified range to measure small
signals. The DS1863 can then right shift the results by n
bits to maintain the bit weight of their specification.
ADC Default Monitor Full Scale Ranges
The high and low transmit power quick-trip registers
(HTXP and LTXP) set the thresholds used to compare
against the BMD voltage to determine if the transmit
power is within specification. The HBIAS quick-trip
compares the MON1 input (generally from the
MAX3643 bias monitor output) against its threshold set-
ting to determine if the present bias current is above
specification. The Max Bias quick-trip is a digital com-
SIGNAL (UNITS)
Temperature ( o C)
V CC (V)
MON1, MON2,
MON3 (V)
+ FS
SIGNAL
127.996
6.5528
2.4997
+ FS
HEX
7FFF
FFF8
FFF8
- FS
SIGNAL
-128
0V
0V
- FS
HEX
8000
0000
0000
parison that determines if the Bias Output code indi-
cates the bias current is above specification. The bias
current will not be allowed to exceed the value set in
this register. When the DS1863 detects the bias is at
the limit it will set the BIAS MAX status bit and hold the
bias current at the MAX IBIAS level. The quick-trips are
routed to the TX-F and FETG outputs via interrupt
masks to allow combinations of these alarms to be
used to trigger these outputs. Any time FETG is trig-
gered the DS1863 will also disable its outputs. All the
The ADC results (after right shifting, if used) are com-
pared to high alarm thresholds (to check if the results
exceeded this threshold), the low alarm thresholds (to
check if the ADC results are below this threshold) and
the warning threshold after each conversion (20 com-
parisons total), and the corresponding alarms are set
which can be used to trigger the TX-F or FETG outputs.
These ADC thresholds are user programmable via the
I 2 C interface, as are the masking registers that can be
____________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1863T+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| DS1864 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SFP Laser Controller and Diagnostic IC |
| DS1864K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS1864T | 制造商:Maxim Integrated Products 功能描述:DUAL TMP CTRL DAC+MONITORS,QFN - Rail/Tube |
| DS1864T+ | 功能描述:激光驱动器 SFP Laser Controller & Diagnostic IC RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
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