Contents
- 1 What do you need to know about ESD suppression?
- 2 Which is the best ESD diode for TVS?
- 3 What is the Littelfuse ESD protection design guide?
- 4 How are chip varistors used in ESD protection?
- 5 How does electrostatic discharge ( ESD ) work on portable devices?
- 6 How are analog inputs protected during ESD and EFT?
- 7 Are there any ICs that can survive ESD?
What do you need to know about ESD suppression?
•Protection is required on data, signal, and control lines (not power supply lines) When to Choose TVS Diode Arrays (SPA®Diodes) •The device being protected requires the lowest possible clamp voltage, low capacitance (0.1pF-400pF) and low leakage (0.01µA – 10µA) •Board space is at a premium and space-savings multi-line protection is needed
Which is the best ESD diode for TVS?
Vsus SPHVxx SSTXn2 SSTXp2 Recommended TVS Diode Arrays: Ordering ESD Level 1/0 Capacitance @ VR=OV #of Number (Contact) Channels RF3077-000 ±12kV 0.2pF 4 SP1003-01 ETG ±30kV 30pF 1 SP1006-01 UTG ±30kV 25pF 1 SPHVxx-01 ETG ±15 to 30kV 25 to 60pF 1 SP3022-01 ETG ±22kV 0.35pF 1 SP3022-01 WTG
When to choose TVS diode arrays ( spa®diodes )?
When to Choose TVS Diode Arrays (SPA®Diodes) •The device being protected requires the lowest possible clamp voltage, low capacitance (0.1pF-400pF) and low leakage (0.01µA – 10µA) •Board space is at a premium and space-savings multi-line protection is needed •Transients other than ESD, such as EFT or lightning, must also be considered
What is the Littelfuse ESD protection design guide?
This guide is designed to summarize some of the comprehensive ESD solutions that Littelfuse offers, and help designers narrow to technologies appropriate to their end application: ESD Electrostatic Discharge (ESD) Protection Design Guide
How are chip varistors used in ESD protection?
Chip varistors are used in a wide variety of electronic equipment as general purpose ESD protection components. ESD suppressor is a gapped type ESD (electro-static discharge) protection component. The minimized static capacitance is suited for using in a high-speed signal line.
Which is the best MOV for ESD protection?
For surge and ESD protection, an MOV (e.g. LA series) or TVS diode (e.g. P4KE or P4SMA series) can be used. Note that the magnitude of the surge transient should be understood as this can point to alternative solutions.
How does electrostatic discharge ( ESD ) work on portable devices?
Portable devices can experience a charge buildup as they are carried by users on their person or in a purse. This energy can then be discharged to another device as the two are connected, usually when a user touches I/O pins on a cable connec- tor.
How are analog inputs protected during ESD and EFT?
Analog inputs are generally lower impedance than digital inputs and can experience physical damage if not protected during ESD and EFT transients. However, on most MCUs, the analog inputs are multiplexed with general-purpose I/O pins and have a small sampling window in which the lower input impedance is active.
How does the on chip ESD protection network work?
The I/O pin structure and on-chip ESD protection network can dissipate small amounts of injected energy. However, if the injected current is greater than the local circuit can handle, this excessive current can find alternative paths through the supply rails or substrate and disrupt other circuitry.
Are there any ICs that can survive ESD?
Most ICs operate at low voltages and have structures and conductive paths that cannot survive the high currents and voltages associated with ESD transients. Another significant trend is the migration to higher fre- quency communication devices to transmit more informa- tion in less time.