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5

TVS Diode Arrays

SP720

Electronic Protection Array for ESD and Overvoltage Protection

ESD Capability

ESD capability is dependent on the application and defined test

standard. The evaluation results for various test standards and methods

based on Figure 1 are shown in Table 1.

For the “Modified” MIL-STD-3015.7 condition that is defined as an

“in-circuit” method of ESD testing, the V+ and V- pins have a return path

to ground and the SP720 ESD capability is typically greater than 15kV

from 100pF through 1.5kΩ. By strict definition of MIL-STD-3015.7 using

“pin-to-pin” device testing, the ESD voltage capability is greater than 6kV.

The MIL-STD-3015.7 results were determined from AT&T ESD Test

Lab measurements.

The HBM capability to the IEC 61000-4-2 standard is greater than 15kV

for air discharge (Level 4) and greater than 4kV for direct discharge

(Level 2). Dual pin capability (2 adjacent pins in parallel) is well in excess

of 8kV (Level 4).

For ESD testing of the SP720 to EIAJ IC121 Machine Model (MM) standard,

the results are typically better than 1kV from 200pF with no series resistance.

Absolute Maximum Ratings

Continuous Supply Voltage, (V+) - (V-). ........................ +35V

Forward Peak Current, IIN to VCC, IIN to GND

(Refer to Figure 6) . .................................±2A, 100µs

ESD Ratings and Capability (Figure 1, Table 1)

Load Dump and Reverse Battery (Note 2)

Thermal Information

PDIP Package . ............................................90

SOIC Package . ..........................................130

(SOIC Lead Tips Only)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device

at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range,

-

2 to 30

-

V

Forward Voltage Drop:

IN to V-

IN to V+

-

-

2

2

-

-

V

V

Input Leakage Current

-20

5

20

nA

Quiescent Supply Current

-

50

200

nA

Equivalent SCR ON Threshold

Note 3

-

1.1

-

V

Equivalent SCR ON Resistance

-

1

-

Ω

Input Capacitance

3pF

Input Switching Speed

2ns

NOTES:

2. In automotive and battery operated systems, the power supply lines should be externally protected for load dump and reverse battery. When the

V+ and V- pins are connected to the same supply voltage source as the device or control line under protection, a current limiting resistor should

be connected in series between the external supply and the SP720 supply pins to limit reverse battery current to within the rated maximum

limits. Bypass capacitors of typically 0.01µF or larger from the V+ and V- pins to ground are recommended.

3. Refer to the Figure 3 graph for definitions of equivalent “SCR ON Threshold” and “SCR ON Resistance.” These characteristics are given here

for thumb-rule information to determine peak current and dissipation under EOS conditions.

--

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STANDARD

TYPE/MODE

MIL STD 3015.7 Modified HBM

1.5kΩ 100pF 15kV

Standard HBM

1.5kΩ 100pF

6kV

IEC 61000-4-2

HBM, Air Discharge

330Ω 150pF 15kV

HBM, Direct Discharge

330Ω 150pF

4kV

HBM, Direct Discharge,

Two Parallel Input Pins

330Ω 150pF

8kV

EIAJ IC121

Machine Model

0kΩ

200pF

1kV

H.V.

SUPPLY

IN

DUT

CHARGE

SWITCH

DISCHARGE

SWITCH

FIGURE 1. ELECTROSTATIC DISCHARGE TEST

TABLE 1. ESD TEST CONDITIONS