MAX3050数据手册_2n3904数据手册资源-CSDN文库

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MAX3050数据手册中包含了丰富的技术细节和应用信息，以下是对该手册内容的知识点汇总： 1. CAN接口电路的基本概念 CAN（Controller Area Network）接口电路是一种被广泛使用的、在车辆和工业应用中实现设备之间通信的协议。它可以实现设备之间的高速通讯，并具有一定的错误检测和处理能力。 2. MAX3050和MAX3057的功能和特性 MAX3050和MAX3057是一种CAN总线收发器，它们可以在CAN协议控制器和物理总线线路上提供差分收发能力，符合ISO11898标准。它们的工作温度范围是-40°C至+125°C。 3. 工作模式 MAX3050和MAX3057支持四种工作模式：高速模式、斜率控制模式、待命模式和关闭模式。高速模式支持高达2Mbps的数据速率，适合要求高速数据传输的系统；斜率控制模式允许数据速率在40kbps至500kbps之间变化，这有助于减少电磁干扰（EMI），适用于使用未屏蔽的双绞线或平行电缆；待命模式下发送器关闭而接收器进入低电流模式；关闭模式下则完全关闭发送器和接收器。 4. 故障保护功能这些芯片具备±80V的故障保护能力，用以对抗高压电源总线中的短路情况，适应高达42V的系统电压。 5. 自动休眠和唤醒功能 MAX3050具有独特的AutoShutdown™功能，当总线或CAN控制器处于不活跃状态4毫秒或更长时间时，设备会自动切换到15毫秒的休眠模式。此外，该设备还支持从休眠模式自动唤醒。 6. 热保护和电流限制提供热保护功能以防止过热损坏芯片，同时具备电流限制功能以保护电路在异常情况下不会因电流过大而损坏。 7. 典型应用电路手册提供了典型的应用电路图，以便开发者根据MAX3050和MAX3057的特性设计相应的电路。 8. 物理封装和引脚配置 MAX3050和MAX3057采用了8脚SO封装，这种小型封装易于安装在PCB上，同时具有紧凑的空间优势。 9. 工作环境和温度范围数据手册表明，该器件能够在-40°C至+125°C的温度范围内正常工作，这使得它非常适合于各种工业和车辆环境，包括极端的温度条件。 10. 绝对最大额定值手册详细列出了MAX3050和MAX3057的绝对最大额定值，包括电源和地之间的电压差、输入和输出引脚对地电压、连续功耗等，这些参数对于保证器件长期可靠工作至关重要。 11. 标准兼容性芯片完全兼容ISO11898标准，这表示MAX3050和MAX3057可以广泛适用于要求严格遵守该标准的各种CAN网络中。在阅读和理解MAX3050数据手册时，以上内容提供了关于芯片核心特性的深入理解，并为设计人员提供了实现高性能CAN网络所需的关键技术信息。通过应用这些知识点，设计者能够构建既高速又稳定的CAN总线系统，以满足各种工业和车辆通信的需求。

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General Description

The MAX3050 and MAX3057 interface between the

CAN protocol controller and the physical wires of the bus

lines in a control area network (CAN). They are primarily

intended for systems requiring data rates up to 2Mbps

and feature ±80V fault protection against shorts in high-

voltage power buses. They provide differential transmit

capability to the bus and differential receive capability to

the CAN controller.

The MAX3050 and MAX3057 have four modes of operation:

high speed, slope control, standby, and shutdown. High-

speed mode allows data rates up to 2Mbps. In slope-control

mode, data rates are 40kbps to 500kbps, so the effects of

EMI are reduced, and unshielded twisted or parallel cable

can be used. In standby mode, the transmitters are shut off

and the receivers are put into low-current mode. In shutdown

mode, the transmitter and receiver are switched off.

The MAX3050 has an AutoShutdown™ function that puts

the device into a 15ms shutdown mode when the bus or

CAN controller is inactive for 4ms or longer.

The MAX3050 and MAX3057 are available in an 8-pin

SO package and are specified for operation from -40°C

to +125°C.

Applications

● HVAC Controls

● Telecom 72V systems

Features

● ±80V Fault Protection for 42V Systems

● Four Operating Modes:

• High-Speed Operation Up to 2Mbps

• Slope-Control Mode to Reduce EMI

(40kbps to 500kbps)

• Standby Mode

• Low-Current Shutdown Mode

● AutoShutdown when Device is Inactive (MAX3050)

● Automatic Wake-Up from Shutdown (MAX3050)

● Thermal Shutdown

● Current Limiting

● Fully Compatible with the ISO 11898 Standard

19-2670; Rev 1; 6/14

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

PART TEMP RANGE PIN-PACKAGE

MAX3050ASA -40°C to +125°C 8 SO

MAX3057ASA -40°C to +125°C 8 SO

CANL

RXD

CANHGND

TXD

TOP VIEW

MAX3050

MAX3057

SHDN

MAX3050

MAX3057

CAN

CONTROLLER

TXD

RXD

GND

CANH

CANL

(100nF)

120Ω

TX0

RX0

GND

0.1µF

30pF

24kΩ TO 180kΩ

SHDN

( ) ARE FOR 3050 ONLY.

MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low-Supply

Current CAN Transceivers

Ordering Information

Pin Conguration

Typical Operating Circuit

to GND ............................................................ -0.3V to +6V

TXD, RS, RXD, SHDN to GND....................-0.3V to (V

+ 0.3V)

RXD Shorted to GND................................................. Continuous

CANH, CANL to GND...........................-80V to +80V Continuous

Continuous Power Dissipation (T

= +70°C)

8-Pin SO (derate 5.9mW/°C above +70°C) .................470mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

= +5V ±10%, R

= 60Ω, RS = GND, T

= T

MIN

to T

MAX

. Typical values are at V

= +5V and T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Current I

Dominant (Note 1) 56 72

Dominant no load 6

Recessive (Note 1) 3.6 5.5

Recessive no load 5.5

Quiescent Current Standby Mode I

= V

125 260 µA

Shutdown Supply Current I

QSHDN

SHDN = GND 15 30 µA

Thermal-Shutdown Threshold 160 °C

Thermal-Shutdown Hysteresis 20 °C

TXD INPUT LEVELS

High-Level Input Voltage V

2 V

Low-Level Input Voltage V

0.4 V

High-Level Input Current I

TXD

= V

1 µA

Pullup Resistor R

INTXD

20 kΩ

CANH, CANL TRANSMITTER

Recessive Bus Voltage

CANH,

CANL

TXD

= V

, no load 2 3 V

Off-State Output Leakage I

-2V < V

CANH

, V

CANL

< +7V

SHDN = GND, V

TXD

= V

-2 +1

-80V < V

CANH

, V

CANL

< +80V

SHDN = GND, V

TXD

= V

-4 +4

CANH Output Voltage V

CANH

TXD

= 0 3.0 V

CANL Output Voltage V

CANL

TXD

= 0 0 2.0 V

Differential Output

CANH

- V

CANL

)

CANH

CANL

TXD

= 0 1.5 5

TXD

= 0, R

= 45Ω 1.5

TXD

= V

, no load -500 +50 mV

CANH Short-Circuit Current I

CANH

= -5V -200 mA

CANL Short-Circuit Current I

CANL

= 18V 200 mA

ESD CANH, CANL (Note 2)

Human Body Model ±2

kVIEC1000-4-2 Air Gap ±3

IEC1000-4-2 Contact Discharge ±2.5

MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low-Supply

Current CAN Transceivers

www.maximintegrated.com

Maxim Integrated

│

Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these

or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect

device reliability.

DC Electrical Characteristics

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