OPA141 datasheet(16/23 Pages) TI

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AmbientTemperature( C)

TSSOPQuad

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MAXIMUMSUPPLYVOLTAGEvsTEMPERATURE

(QuiescentCondition)

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V+

CC+

CC-

S/2

2kW

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MAXIMUMSUPPLYVOLTAGEvsTEMPERATURE

(MaximumDCLoadonAllChannels)

OPA141

OPA2141

OPA4141

SBOS510B – MARCH 2010 – REVISED MAY 2010

www.ti.com

functions have electrical stress limits determined by

the

voltage

breakdown

characteristics

the

particular semiconductor fabrication process and

specific circuits connected to the pin. Additionally,

internal electrostatic discharge (ESD) protection is

built

into

these

circuits

protect

them

from

accidental ESD events both before and during

product assembly.

It is helpful to have a good understanding of this

basic ESD circuitry and its relevance to an electrical

overstress event. See Figure 35 for an illustration of

the ESD circuits contained in the OPAx141 series

(indicated by the dashed line area). The ESD

protection circuitry involves several current-steering

diodes connected from the input and output pins and

routed back to the internal power-supply lines, where

they meet at an absorption device internal to the

operational amplifier. This protection circuitry is

Figure 33. Maximum Supply Voltage vs

intended to remain inactive during normal circuit

Temperature (OPA2141 and OPA4141), Quiescent

operation.

Condition

ESD

event

produces

short

duration,

high-voltage pulse that is transformed into a short

duration, high-current pulse as it discharges through

a semiconductor device. The ESD protection circuits

are designed to provide a current path around the

operational amplifier core to prevent it from being

damaged. The energy absorbed by the protection

circuitry is then dissipated as heat.

When an ESD voltage develops across two or more

of the amplifier device pins, current flows through one

or more of the steering diodes. Depending on the

path that the current takes, the absorption device

may activate. The absorption device has a trigger, or

threshold voltage, that is above the normal operating

voltage of the OPAx141 but below the device

breakdown voltage level. Once this threshold is

exceeded, the absorption device quickly activates

and clamps the voltage across the supply rails to a

safe level.

Figure 34. Maximum Supply Voltage vs

When the operational amplifier connects into a circuit

Temperature (OPA2141 and OPA4141), Maximum

such as the one Figure 35 shows, the ESD protection

DC Load

components are intended to remain inactive and not

become involved in the application circuit operation.

However, circumstances may arise where an applied

ELECTRICAL OVERSTRESS

voltage exceeds the operating voltage range of a

Designers often ask questions about the capability of

given pin. Should this condition occur, there is a risk

operational

amplifier

withstand

electrical

that some of the internal ESD protection circuits may

overstress. These questions tend to focus on the

be biased on, and conduct current. Any such current

device inputs, but may involve the supply voltage pins

flow occurs through steering diode paths and rarely

or even the output pin. Each of these different pin

involves the absorption device.

Product Folder Link(s): OPA141 OPA2141 OPA4141

OPA141 Datasheet(PDF) 16 Page - Texas Instruments

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