OrderableDevice datasheet(24/76 Pages) TI1

24 / 76 page

TLV9051, TLV9052, TLV9054

SBOS942F – AUGUST 2018 – REVISED JUNE 2019

www.ti.com

Product Folder Links: TLV9051 TLV9052 TLV9054

Submit Documentation Feedback

8.3 Feature Description

8.3.1 Operating Voltage

The TLV905x family of op amps is specified for operation from 1.8 V to 5.5 V. In addition, many specifications

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

illustrated in the Typical Characteristics section.

8.3.2 Rail-to-Rail Input

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

full supply voltage range of 1.8 V to 5.5 V. 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 Functional Block

Diagram section. The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.4 V to

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

negative supply to approximately (V+) – 1.4 V. There is a small transition region, typically (V+) – 1.2 V to (V+) –

1 V, in which both pairs are on. This 200-mV transition region can vary up to 200 mV with process variation.

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

up to (V+) – 1 V to (V+) – 0.8 V 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.

8.3.3 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 10 kΩ, the output swings to within 16 mV 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.

8.3.4 Overload Recovery

Overload recovery is defined as the time required for the operational amplifier output to recover from a saturated

state to a linear state. The output devices of the operational amplifier enter a saturation region when the output

voltage exceeds the rated operating voltage, because of the high input voltage or high gain. After the device

enters the saturation region, the output devices require time to return to the linear operating state. After the

output devices return to their linear operating state, the device begins to slew at the specified slew rate.

Therefore, the propagation delay (in case of an overload condition) is the sum of the overload recovery time and

the slew time. The overload recovery time for the TLV905x family is approximately 300 ns.

8.3.5 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 39 shows the ESD circuits contained in the TLV905x 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.

OrderableDevice Scheda tecnica(PDF) 24 Page - Texas Instruments

OrderableDevice Scheda tecnica(HTML) 24 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76

Scheda tecnica Scarica

Link URL