参数资料
| 型号： | MAX14820ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/30页 |
| 文件大小： | 0K |
| 描述： | IC IO-LINK TXRX 24TQFN |
| 标准包装： | 2,500 |
| 系列： | * |
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MAX14820
IO-Link Device Transceiver
16
Maxim Integrated
Detailed Description
The MAX14820 is a sensor/actuator transceiver designed
for IO-Link device applications supporting all the
specified IO-Link data rates. In IO-Link applications, the
devices act as the physical layer interface to a microcon-
troller running the data-link layer protocol. The device
contains an additional 24V digital input and an additional
24V digital output. Two internal linear regulators gener-
ate common sensor and actuator power requirements:
5V and 3.3V.
The device detects IO-Link wake-up conditions on the C/Q
line and generates a wake-up signal on the WU output.
The C/Q and DO drivers are independently configurable to
any one of three driver output types: push-pull, high-side
(PNP), or low-side (NPN).
The C/Q and DI inputs have selectable current sinks that
can be enabled for use in actuators where the master
requires a Type 2 load. These devices are configured
and monitored through an SPI interface. Extensive
alarms are available through SPI.
24V Interface
The device features an IO-transceiver interface capable
of operating with voltages up to 36V. This is the 24V inter-
face and includes the C/Q input/output, the logic-level
digital output (DO), and the logic-level digital input (DI).
Configurable Drivers
The device features selectable push-pull, high-side (PNP),
or low-side (NPN) switching drivers at C/Q and DO.
Set the C/Q_N/P and C/Q_PP bits in the CQConfig reg-
ister to select the driver mode for the C/Q driver. When
configured as a push-pull output, C/Q switches between
VP and ground. Set the C/Q_PP bit to 1 to select push-
pull operation at C/Q. Set the C/Q_PP bit to 0 to configure
the C/Q output for open-drain operation. The C/Q_N/P bit
selects NPN or PNP operation when C/Q is configured as
an open-drain output.
Set the DoN/P and DoPP bits in the DIOConfig register
to select the driver mode for the DO output. When con-
figured as a push-pull output, DO switches between VCC
and ground. Set the DoPP bit to 1 for push-pull operation.
The DoN/P bit selects NPN or PNP operation when DO is
configured as an open-drain output. Set the DoPP bit to 0
to select high-side or low-side operation at DO.
C/Q Driver and Receiver
The TXEN input enables the C/Q driver. Drive TXEN high
to enable the C/Q driver. Drive TXEN low to disable the
driver.
The device’s C/Q driver is specified for 300mA to drive
large capacitive loads of up to 1FF and dynamic imped-
ances like incandescent lamps. The maximum load cur-
rent for C/Q is limited to 480mA.
The HiSlew bit increases the slew rate of the C/Q and DO
driver outputs. Set HiSlew to 1 for data rates of 230kbps
or higher. Set HiSlew to 0 to reduce both the C/Q and DO
driver slew rates to reduce EMI emission and reflections.
The C/Q receiver is always on. Disable the RX output
through the RxDis bit in the CQConfig register. Set the
RxDis bit to 1 to set the RX output high. Set the RxDis bit
to 0 for normal receive operation.
The C/Q receiver has an analog lowpass filter to reduce
high-frequency noise present on the line. Set the RxFilter
bit in the CQConfig register to 0 to set the filter corner
frequency to 500kHz (typ). Set the RxFilter bit to 1 to set
the corner frequency of the filter to 1MHz (typ). Noise
filters are present on both the C/Q and DI receivers and
are controlled simultaneously by the RxFilter bit.
C/Q Fault Detection
The device registers a C/QFault condition under either of
two conditions:
1) When it detects a short circuit for longer than 140s
(typ). A short condition exists when the C/Q driver’s
load current exceeds the 375mA (typ) current limit.
2) When it detects a voltage level error at the C/Q out-
put. A voltage level error occurs when the C/Q driver
is configured for open-drain operation (NPN or PNP),
the driver is turned off, and the C/Q voltage is not
pulled to exceed the C/Q receiver’s threshold levels
(< 8V or > 13V) by the external supply.
When a C/QFault error occurs, the C/QFault and
C/QFaultInt bits are set, IRQ asserts, and the driver is
turned off 240s (typ) after the start of the fault condition.
When a short-circuit event occurs on C/Q, the driver
enters autoretry mode. In autoretry mode the device
periodically checks whether the short is still present and
attempts to correct the driver output. Autoretry attempts
last for 240s (typ) and occur every 26ms (typ).
IO-Link is a registered trademark of Profibus User Organization (PNO).
SPI is a trademark of Motorola, Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14820EVKIT# | 功能描述:界面开发工具 MAX14820/21 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 |
| MAX14821ETG+ | 功能描述:输入/输出控制器接口集成电路 NEW RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| MAX14821ETG+T | 功能描述:输入/输出控制器接口集成电路 NEW RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| MAX14821EVKIT# | 功能描述:界面开发工具 MAX14820/21 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 |
| MAX14821EWA+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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