LPV358MMX Datasheet, PDF (11/28 Pages) Texas Instruments – LPV321-N Single/LPV358 Dual/LPV324 Quad General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers

LPV321, LPV324-N, LPV358-N
www.ti.com
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.
The differential input voltage may be larger than V⁺ without damaging the device. Protection should be provided
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