LPV321, LPV324-N, LPV358-N

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SNOS413D – AUGUST 2000 – REVISED MARCH 2013

APPLICATION INFORMATION

Benefits of the LPV321-N/358/324

Size

The small footprints of the LPV321-N/358/324 packages save space on printed circuit boards, and enable the

design of smaller electronic products, such as cellular phones, pagers, or other portable systems. The low profile

of the LPV321-N/358/324 make them possible to use in PCMCIA type III cards.

Signal Integrity

Signals can pick up noise between the signal source and the amplifier. By using a physically smaller amplifier

package, the LPV321-N/358/324 can be placed closer to the signal source, reducing noise pickup and increasing

signal integrity.

Simplified Board Layout

These products help you to avoid using long pc traces in your pc board layout. This means that no additional

components, such as capacitors and resistors, are needed to filter out the unwanted signals due to the

interference between the long pc traces.

Low Supply Current

These devices will help you to maximize battery life. They are ideal for battery powered systems.

Low Supply Voltage

TI provides ensured performance at 2.7V and 5V. These specifications ensure operation throughout the battery

lifetime.

Rail-to-Rail Output

Rail-to-rail output swing provides maximum possible dynamic range at the output. This is particularly important

when operating on low supply voltages.

Input Includes Ground

Allows direct sensing near GND in single supply operation.

to prevent the input voltages from going negative more than

−0.3V (at 25°C). An input clamp diode with a resistor

to the IC input terminal can be used.

Capacitive Load Tolerance

The LPV321-N/358/324 can directly drive 200 pF in unity-gain without oscillation. The unity-gain follower is the

most sensitive configuration to capacitive loading. Direct capacitive loading reduces the phase margin of

amplifiers. The combination of the amplifier's output impedance and the capacitive load induces phase lag. This

results in either an underdamped pulse response or oscillation. To drive a heavier capacitive load, circuit in

Figure 40 can be used.

Figure 40. Indirectly Driving A Capacitive Load Using Resistive Isolation

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Product Folder Links: LPV321 LPV324-N LPV358-N