TLV9041UIDBVR datasheet(23/72 Pages) TI

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Table 8-1. TLV904x EMIRR IN+ for Frequencies of Interest (continued)

FREQUENCY

APPLICATION OR ALLOCATION

EMIRR IN+

1.8 GHz

GSM applications, mobile personal communications, broadband, satellite, L-band (1 GHz to 2 GHz)

75 dB

2.4 GHz

802.11b, 802.11g, 802.11n, Bluetooth®, mobile personal communications, industrial, scientific and

medical (ISM) radio band, amateur radio and satellite, S-band (2 GHz to 4 GHz)

79.0 dB

3.6 GHz

Radiolocation, aero communication and navigation, satellite, mobile, S-band

82 dB

5 GHz

802.11a, 802.11n, aero communication and navigation, mobile communication, space and satellite

operation, C-band (4 GHz to 8 GHz)

85 dB

8.3.8 Electrical Overstress

Designers often ask questions about the capability of an operational amplifier to withstand electrical overstress.

These questions tend to focus on the device inputs, but can involve the supply voltage pins or even the output

pin. Each of these different pin functions have electrical stress limits determined by the voltage breakdown

characteristics of the particular semiconductor fabrication process and specific circuits connected to the pin.

Additionally, internal electrostatic discharge (ESD) protection is built into these circuits to protect them from

accidental ESD events both before and during product assembly.

Having a good understanding of this basic ESD circuitry and its relevance to an electrical overstress event

is helpful. Figure 8-5 shows the ESD circuits contained in the TLV904x devices. 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 intended to remain inactive during normal circuit operation.

V +

V±

+IN

± IN

OUT

Power Supply

ESD Cell

Figure 8-5. Equivalent Internal ESD Circuitry

8.3.9 Input and ESD Protection

The TLV904x family incorporates internal ESD protection circuits on all pins. For input and output pins, this

protection primarily consists of current-steering diodes connected between the input and power-supply pins.

These ESD protection diodes provide in-circuit, input overdrive protection, as long as the current is limited to

10 mA. Figure 8-6 shows how a series input resistor can be added to the driven input to limit the input current.

The added resistor contributes thermal noise at the amplifier input and the value must be kept to a minimum in

noise-sensitive applications.

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TLV9041, TLV9042, TLV9044

SBOS836G – MARCH 2020 – REVISED MARCH 2022

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