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参数资料
| 型号： | ADM2687EBRIZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/24页 |
| 文件大小： | 0K |
| 描述： | IC TXRX ISOLATED RS485 16SOIC |
| 标准包装： | 400 |
| 系列： | isoPower® |
| 类型： | 收发器 |
| 电压 - 隔离： | 5000Vrms |
| 输入类型： | DC |
| 电源电压： | 3.3V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC-IC |
| 包装： | 带卷 (TR) |
Data Sheet
INSULATION LIFETIME
All insulation structures eventually break down when subjected to
voltage stress over a sufficiently long period. The rate of insulation
degradation is dependent on the characteristics of the voltage
waveform applied across the insulation. Analog Devices conducts
an extensive set of evaluations to determine the lifetime of the
Accelerated life testing is performed using voltage levels higher
than the rated continuous working voltage. Acceleration factors for
several operating conditions are determined, allowing calculation
of the time to failure at the working voltage of interest. The values
ADM2682E/ADM2687E
the unipolar ac or dc voltage cases. Any cross-insulation voltage
waveform that does not conform to Figure 43 or Figure 44 should
be treated as a bipolar ac waveform, and its peak voltage should
RATED PEAK VOLTAGE
0V
Figure 42. Bipolar AC Waveform
RATED PEAK VOLTAGE
shown in Table 9 summarize the peak voltages for 50 years of
service life in several operating conditions. In many cases, the
working voltage approved by agency testing is higher than the
0V
Figure 43. DC Waveform
50-year service life voltage. Operation at working voltages higher
than the service life voltage listed leads to premature insulation
failure.
The insulation lifetime of the ADM2682E / ADM2687E depends
on the voltage waveform type imposed across the isolation barrier.
The i Coupler insulation structure degrades at different rates,
depending on whether the waveform is bipolar ac, unipolar ac,
or dc. Figure 42, Figure 43, and Figure 44 illustrate these different
isolation voltage waveforms.
Bipolar ac voltage is the most stringent environment. A 50-year
operating lifetime under the bipolar ac condition determines
the Analog Devices recommended maximum working voltage.
In the case of unipolar ac or dc voltage, the stress on the insulation
is significantly lower. This allows operation at higher working
voltages while still achieving a 50-year service life. The working
voltages listed in Table 9 can be applied while maintaining the
RATED PEAK VOLTAGE
0V
NOTES
1. THE VOLTAGE IS SHOWN AS SINUSODIAL FOR ILLUSTRATION
PURPOSES ONLY. IT IS MEANT TO REPRESENT ANY VOLTAGE
WAVEFORM VARYING BETWEEN 0 AND SOME LIMITING VALUE.
THE LIMITING VALUE CAN BE POSITIVE OR NEGATIVE, BUT THE
VOLTAGE CANNOT CROSS 0V.
Figure 44. Unipolar AC Waveform
ISOLATED SUPPLY CONSIDERATIONS
The typical output voltage of the integrated iso Power dc-to-dc
ADM2687E is typically capable of supplying a current of 55 mA
when the junction temperature of the device is kept below 130°C.
This includes the current required by the internal RS-485 circuitry,
and typically, no additional current is available on V ISOOUT for
external applications.
50-year minimum lifetime, provided the voltage conforms to either
Rev. B | Page 19 of 24
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| ADM2687EBRWZ | 制造商:Analog Devices 功能描述: |
| ADM2795EARWZ | 功能描述:1/1 Transceiver Half RS422, RS485 16-SOIC 制造商:analog devices inc. 系列:- 包装:管件 零件状态:在售 类型:收发器 协议:RS422，RS485 驱动器/接收器数:1/1 双工:半 接收器滞后:30mV 数据速率:2.5Mbps 电压 - 电源:1.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:16-SOIC（0.209"，5.30mm 宽） 供应商器件封装:16-SOIC 标准包装:47 |
| ADM2795EARWZ-RL7 | 功能描述:IC TXRX 1/1 RS422/RS485 16-SOIC 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 类型:收发器 协议:RS422，RS485 驱动器/接收器数:1/1 双工:半 接收器滞后:30mV 数据速率:2.5Mbps 电压 - 电源:1.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.209"，5.30mm 宽） 供应商器件封装:16-SOIC 标准包装:400 |
| ADM2795EBRWZ | 功能描述:1/1 Transceiver Half RS422, RS485 制造商:analog devices inc. 系列:- 包装:管件 零件状态:在售 类型:收发器 协议:RS422，RS485 驱动器/接收器数:1/1 双工:半 接收器滞后:30mV 数据速率:2.5Mbps 电压 - 电源:1.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C（TA） 安装类型:* 封装/外壳:* 供应商器件封装:* 标准包装:47 |
| ADM2795EBRWZ-RL7 | 功能描述:IC TXRX 1/1 RS422/RS485 16-SOIC 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 类型:收发器 协议:RS422，RS485 驱动器/接收器数:1/1 双工:半 接收器滞后:30mV 数据速率:2.5Mbps 电压 - 电源:1.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.209"，5.30mm 宽） 供应商器件封装:16-SOIC 标准包装:400 |
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