TLV9052IDDFRG4 datasheet(21/87 Pages) TI2

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7.3 Feature Description

7.3.1 Operating Voltage

The TLV905x family of op amps is specified for operation from 1.8V to 6.0V. In addition, many specifications

apply from –40°C to 125°C. Parameters that vary significantly with operating voltages or temperature are

illustrated in the Section 6.8.

7.3.2 Rail-to-Rail Input

The input common-mode voltage range of the TLV905x family extends 100mV beyond the supply rails for the

full supply voltage range of 1.8V to 6.0V. This performance is achieved with a complementary input stage:

an N-channel input differential pair in parallel with a P-channel differential pair, as shown in the Section 7.2.

The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.4V to 200mV above

the positive supply, whereas the P-channel pair is active for inputs from 200mV below the negative supply to

approximately (V+) – 1.4V. There is a small transition region, typically (V+) – 1.2V to (V+) – 1V, in which both

pairs are on. This 200-mV transition region can vary up to 200mV with process variation. Thus, the transition

region (with both stages on) can range from (V+) – 1.4V to (V+) – 1.2V on the low end, and up to (V+) – 1V to

(V+) – 0.8V on the high end. Within this transition region, PSRR, CMRR, offset voltage, offset drift, and THD can

degrade compared to device operation outside this region.

7.3.3 Rail-to-Rail Output

Designed as low-power, low-voltage operational amplifiers, the TLV905x family delivers a robust output drive

capability. A class AB output stage with common-source transistors achieves full rail-to-rail output swing

capability. For resistive loads of 10kΩ, the output swings to within 16mV of either supply rail, regardless of

the applied power-supply voltage. Different load conditions change the ability of the amplifier to swing close to

the rails.

7.3.4 EMI Rejection

The TLV905x uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from

sources such as wireless communications and densely-populated boards with a mix of analog signal chain and

digital components. EMI immunity can be improved with circuit design techniques; the TLV905x benefits from

these design improvements. Texas Instruments has developed the ability to accurately measure and quantify the

immunity of an operational amplifier over a broad frequency spectrum extending from 10MHz to 6GHz. Figure

7-1 shows the results of this testing on the TLV905x. Table 7-1 shows the EMIRR IN+ values for the TLV905x at

particular frequencies commonly encountered in real-world applications. The EMI Rejection Ratio of Operational

Amplifiers application report contains detailed information on the topic of EMIRR performance as it relates to op

amps and is available for download from www.ti.com.

Frequency (Hz)

100

120

140

10M

100M

D007

Figure 7-1. EMIRR Testing

www.ti.com

TLV9051, TLV9052, TLV9054

SBOS942J – AUGUST 2018 – REVISED FEBRUARY 2024

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