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参数资料
| 型号： | MAX13487EEVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX13487E |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 接口，数字线缆驱动器 |
| 已用 IC / 零件： | MAX13487E |
| 已供物品： | 板 |
MAX13487E Evaluation Kit
RS-485 Bus Pullup/Pulldown and
Termination Resistors Configuration
Jumpers JU6 and JU4 are provided for connecting the
mandatory pullup and pulldown resistors onto the RS-485
bus A and B lines, respectively. Pullup resistor R8 and
Jumper JU5 is provided for terminating the A and B bus
lines when the MAX13487E EV kit is connected at the
end of an RS-485 bus. Resistor R7 provides 120 Ω of ter-
mination when jumper JU5 is used. See Table 4 for con-
figuring the termination mode.
pulldown resistor R6 define the voltage on the A and B
lines in conjunction with R7 when the driver input (DI) is
high. See Table 3 for configuring the pullup and pulldown
resistors. R6 and R8 can be higher valued if the
differential terminal resistor (R7) is not used.
Table 3. JU6, JU4 Functions, Pullup, Pulldown Resistors
SHUNT POSITION
None
Installed
Table 4. JU5 Functions, Bus Termination
A AND B LINE SIGNAL
Not pulled up or down
A signal pulled up, connected to VOUT
B signal pulled down to GND
SHUNT POSITION
None
Installed
A-B PINS AND RS-485 BUS TERMINATION
Not terminated
Terminated
EV KIT BUS CONNECTION
Mid point
End of bus line
Evaluating the MAX13488E IC and
Other Transformer Configurations/Designs
MAX13488E Evaluation
The MAX13487E EV kit can also evaluate the
MAX13488E IC. To evaluate the MAX13488E, replace
IC U1 with the MAX13488E. Note that the MAX13488E
driver slew rate is not limited and allows transmission
speeds of up to 16Mbps. Refer to the MAX13487E/
MAX13488E IC data sheet for additional information.
Smaller Transformer and 2000V RMS
Isolation Design
The EV kit’s two-layer PCB is designed for 2500V RMS
isolation, with 300 mils spacing between the PGND and
GND planes. Additionally, transformer T1 is rated for
3000V RMS and is an integral part of the dielectric with-
stand voltage of the EV kit circuit. Photocouplers U4
and U5 are guaranteed to withstand 3750V RMS .
However, the circuit uses the isolated transformer to
transfer power from the primary side to the secondary
side and the withstand voltage of the transformer, as
well as photocouplers U4 and U5, so the PCB must be
considered when designing and testing the EV kit cir-
cuit. For example, if less than 2500V RMS isolation is
needed, a smaller 2000V RMS transformer may be used
to save board area, but then the entire circuit will have
only 2000V RMS of isolation.
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX13487EEVKIT# | 功能描述:界面开发工具 MAX13487E Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX13488EESA+ | 功能描述:RS-422/RS-485 接口 IC Half-Dplx RS-485/422 5V 16Msps LD/Rc RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| MAX13488EESA+T | 功能描述:RS-422/RS-485 接口 IC Half-Dplx RS-485/422 5V 16Msps LD/Rc RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| MAX1348BETX | 功能描述:ADC / DAC多通道 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 |
| MAX1348BETX+ | 功能描述:ADC / DAC多通道 12-Bit 4Ch 300ksps 5.25 Precision ADC 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 |
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