ISO1050：高级隔离式CAN收发器，抗干扰与恶劣环境适应

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ISO1050是一款专为工业控制和通信设计的隔离式CAN（Controller Area Network）收发器，它遵循并超越了国际标准化组织ISO11898-2的相关技术规范。这款产品采用电镀隔离技术，确保了极高的电磁兼容性，包括5000VRMS的隔离电压（针对ISO1050DW型号）和2500VRMS的故障安全输出，可以有效抵抗噪声和电磁干扰，保护敏感电路免受损害。该CAN转发器的核心特性包括： 1. **ISO11898-2兼容**：ISO1050的设计严格遵循ISO11898-2标准，适用于CAN网络通信，支持高速数据传输，最高可达1Mbps。 2. **电镀隔离**：通过氧化硅(SiO2)绝缘隔栅实现电气隔离，确保信号传输的可靠性和安全性，即使在恶劣环境下也能稳定工作。 3. **低环路延迟**：拥有低至150ns的典型环路延迟，有助于提高通信效率，对于实时性要求高的应用非常重要。 4. **电磁兼容性**：具备50kV/μs瞬态抗扰度，能够抵御来自电网的突发脉冲干扰，同时提供-27V至40V的总线故障保护。 5. **I/O电压范围**：兼容3.3V和5V的微处理器接口，支持广泛的系统集成。 6. **安全防护**：通过UL1577、IEC60950-1、IEC61010-1、IEC60601-1等标准认证，提供过压、过热、串线和接地损耗保护，以及医疗设备级别的安全性。 7. **宽温工作范围**：设计能适应极端环境，工作温度范围从-55°C到105°C，特别适合严酷工业条件。 8. **强化绝缘**：ISO1050DW型号还具备强化绝缘特性，符合GB4843.1-2011标准，进一步增强了设备的耐压和抗干扰能力。 9. **封装信息**：产品提供了详细的封装尺寸信息，便于安装和集成到各种硬件平台中。 ISO1050隔离式CAN收发器凭借其高级别的隔离性能、严格的电磁兼容性和广泛的应用兼容性，是工业自动化、汽车电子和医疗设备等领域中的理想选择，确保了在复杂环境中高效、安全的数据通信。

ISO1050

www.ti.com.cn

ZHCS321I –JUNE 2009–REVISED JANUARY 2015

6.4 Thermal Information

ISO1050

THERMAL METRIC

(1)

DW DUB UNIT

16 PINS 8 PINS

θJA

Junction-to-ambient thermal resistance 76.0 73.3

θJC(top)

Junction-to-case (top) thermal resistance 41 63.2

θJB

Junction-to-board thermal resistance 47.7 43.0

°C/W

Junction-to-top characterization parameter 14.4 27.4

Junction-to-board characterization parameter 38.2 42.7

θJC(bot)

Junction-to-case (bottom) thermal resistance n/a n/a

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics: Supply Current

over recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP

(1)

MAX UNIT

= 0 V or V

CC1

, V

CC1

= 3.3V 1.8 2.8

CC1

Supply current mA

= 0 V or V

CC1

, V

CC1

= 5V 2.3 3.6

Dominant V

= 0 V, 60-Ω Load 52 73

CC2

Supply current mA

Recessive V

= V

CC1

8 12

(1) All typical values are at 25°C with V

CC1

= V

CC2

= 5 V.

6.6 Electrical Characteristics: Driver

over recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CANH 2.9 3.5 4.5

O(D)

Bus output voltage (Dominant) See 图 7 and 图 8, V

= 0 V, R

= 60 Ω V

CANL 0.8 1.2 1.5

O(R)

Bus output voltage (Recessive) See 图 7 and 图 8, V

= 2 V, R

= 60 Ω 2 2.3 3 V

See 图 7, 图 8 and 图 9, V

= 0 V, R

= 60 Ω 1.5 3

OD(D)

Differential output voltage (Dominant) V

See 图 7, 图 8, and 图 9 V

= 0 V, R

= 45Ω,

1.4 3

Vcc > 4.8 V

See 图 7 and 图 8, V

= 3 V, R

= 60 Ω –0.12 0.012

OD(R)

Differential output voltage (Recessive) V

= 3 V, No Load –0.5 0.05

OC(D)

Common-mode output voltage (Dominant) 2 2.3 3

See 图 14 V

OC(pp)

Peak-to-peak common-mode output voltage 0.3

High-level input current, TXD input V

at 2 V 5 μA

Low-level input current, TXD input V

at 0.8 V –5 μA

O(off)

Power-off TXD leakage current V

CC1

, V

CC2

at 0 V, TXD at 5 V 10 μA

See 图 17, V

CANH

= –12 V, CANL Open –105 –72

See 图 17, V

CANH

= 12 V, CANL Open 0.36 1

OS(ss)

Short-circuit steady-state output current mA

See 图 17, V

CANL

=–12 V, CANH Open –1 –0.5

See 图 17, V

CANL

= 12 V, CANH Open 71 105

Output capacitance See receiver input capacitance

CMTI Common-mode transient immunity See 图 19, V

= V

or 0 V 25 50 kV/μs

ISO1050

ZHCS321I –JUNE 2009–REVISED JANUARY 2015

www.ti.com.cn

6.7 Electrical Characteristics: Receiver

over recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP

(1)

MAX UNIT

IT+

Positive-going bus input threshold voltage 750 900 mV

See 表 1

IT–

Negative-going bus input threshold voltage 500 650 mV

hys

Hysteresis voltage (V

IT+

– V

IT–

) 150 mV

= –4 mA, See 图 12 V

– 0.8 4.6

High-level output voltage with Vcc = 5 V V

= –20 μA, See 图 12 V

– 0.1 5

= 4 mA, See 图 12 V

– 0.8 3.1

High-level output voltage with Vcc1 = 3.3 V V

= 20 μA, See 图 12 V

– 0.1 3.3

= 4 mA, See 图 12 0.2 0.4

Low-level output voltage V

= 20 μA, See 图 12 0 0.1

Input capacitance to ground, (CANH or CANL) TXD at 3 V, V

= 0.4 sin (4E6πt) + 2.5 V 6 pF

Differential input capacitance TXD at 3 V, V

= 0.4 sin (4E6πt) 3 pF

Differential input resistance TXD at 3 V 30 80 kΩ

Input resistance (CANH or CANL) TXD at 3 V 15 30 40 kΩ

Input resistance matching

I(m)

CANH

= V

CANL

–3% 0% 3%

(1 – [R

IN (CANH)

/ R

IN (CANL)

]) × 100%

CMTI Common-mode transient immunity V

= V

or 0 V, See 图 19 25 50 kV/μs

(1) All typical values are at 25°C with V

CC1

= V

CC2

= 5 V.

6.8 Switching Characteristics: Device

over recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Total loop delay, driver input to receiver output, Recessive to

loop1

See 图 15 112 150 210 ns

Dominant

Total loop delay, driver input to receiver output, Dominant to

loop2

See 图 15 112 150 210 ns

Recessive

6.9 Switching Characteristics: Driver

over recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

PLH

Propagation delay time, recessive-to-dominant output 31 74 110

PHL

Propagation delay time, dominant-to-recessive output 25 44 75

See 图 10 ns

Differential output signal rise time 20 50

Differential output signal fall time 20 50

TXD_DTO

(1)

Dominant time-out ↓ C

=100 pF, See 图 16 300 450 700 μs

(1) The TXD dominant time out (t

TXD_DTO

) disables the driver of the transceiver once the TXD has been dominant longer than (t

TXD_DTO

)

which releases the bus lines to recessive preventing a local failure from locking the bus dominant. The driver may only transmit

dominant again after TXD has been returned HIGH (recessive). While this protects the bus from local faults locking the bus dominant it

limits the minimum data rate possible. The CAN protocol allows a maximum of eleven successive dominant bits (on TXD) for the worst

case where five successive dominant bits are followed immediately by an error frame. This along with the (t

TXD_DTO

) minimum limits the

minimum bit rate. The minimum bit rate may be calculated by: Minimum Bit Rate = 11/ (t

TXD_DTO

) = 11 bits / 300 µs = 37 kbps.

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