参数资料
| 型号： | DS1862AB+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 19/42页 |
| 文件大小： | 0K |
| 描述： | IC LASR CTRLR 7CHAN 5.5V 25CSBGA |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 126 |
| 类型： | 激光二极管控制器（光纤） |
| 数据速率： | 10Gbps |
| 通道数： | 7 |
| 电源电压： | 2.9 V ~ 5.5 V |
| 电流 - 电源： | 3mA |
| 工作温度： | -40°C ~ 100°C |
| 封装/外壳： | 25-TFBGA，CSPBGA |
| 供应商设备封装： | 25-BGA（5x5） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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XFP Laser Control and Digital Diagnostic IC
Table 8. Temperature Conversion
Examples
loaded into the appropriate channels’ Gain register.
This requires forcing two known voltages on to the
monitor input pin. For best results, one of the forced
MSB (BIN)
01000000
01000000
01011111
11110110
11011000
LSB (BIN)
00000000
00001000
00000000
00000000
00000000
TEMPERATURE (°C)
+64
+64.03215
+95
-10
-40
Internal Calibration
voltages should be the NULL input and the other
should be 90% of FS. Since the LSB of the least signifi-
cant byte in the digital reading register is known, the
expected digital results are also known for both the null
and FS value inputs. Figure 9 describes the hysteresis
built into the DS1862A’s LUT functionality.
M6
The DS1862A has two means for scaling an analog
input to a digital result. The two devices alter the gain
and offset of the signal to be calibrated. All of the
inputs except internal temperature have unique regis-
ters for both the gain and the offset that can be found in
Table 04h. See the table below for a complete descrip-
tion of internal calibration capabilities including right-
shifting for all monitor channels.
Table 9. Internal Calibration Capabilities
M5
M4
M3
M2
DECREASING
TEMPERATURE
INCREASING
TEMPERATURE
SIGNAL
Temperature
INTERNAL
SCALING
—
INTERNAL
OFFSET
x
RIGHT-
SHIFTING
—
M1
V CC2/3
x
x
—
2
4
6 8
TEMPERATURE ( ° C)
10
12
IBIASMON
x
x
x
RSSI (RX-P)
AUX1MON
AUX2MON
BMD (TX-P)
x
x
x
x
x
x
x
x
x
x
x
x
Figure 9. Lookup Table Hysteresis
With the exception of BMD, which can source or sink
current, all monitored channels are high impedance
and are only capable of directly measuring a voltage. If
other measured quantities are desired, such as light,
To scale a specific input’s gain and offset, the relation-
ship between the analog input and the expected digital
result must be known. The input that would produce a
corresponding digital result of all zeroes is the null
value (normally this input is GND). The input that would
produce a corresponding digital result of all ones is the
full-scale (FS) value minus one LSB. The FS value is
also found by multiplying an all ones digital value by
the weighted LSB. For example, a digital reading is 16
bits long, assume that the LSB is known to be 50μV,
then the FS value would be 2 16 x 50μV = 3.2768V.
A binary search can be used to find the appropriate
gain value to achieve the desired FS of the converter.
Once the gain value is determined, then it can be
frequency, power, current, etc., they must be converted
to a voltage. In this situation the user is not interested in
voltage measurement on the monitored channel, but
the measurement of the desired parameter. Only the
relationship between the indirect measured quantity
(light, frequency, power, current, etc.) to the expected
digital result must be known.
An example of gain scaling using the recommended
binary search procedure is provided with the following
pseudo code.
To help will the computation, two integers need to be
defined: count 1 and count 2. CNT1 = NULL / LSB and
CNT2 = 90%FS / LSB. CLAMP is the largest result that
can be accommodated.
______________________________________________________________________________________
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1862AB+ | 功能描述:激光驱动器 XFP Laser Control & Digital Diagnostic 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 |
| DS1862AB+T&R | 制造商:Maxim Integrated Products 功能描述:XFP LASER CONTROL 25CSBGA - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LASR CTRLR 7CHAN 5.5V 25CSBGA |
| DS1862AB+T&R | 功能描述:激光驱动器 XFP Laser Control & Digital Diagnostic 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 |
| DS1862AB+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:XFP Laser Control and Digital Diagnostic IC |
| DS1862B | 功能描述:激光驱动器 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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