LMV321 Rail-to-Rail Operational Amplifier

The LMV321 is a CMOS single low voltage operational amplifier with rail−to−rail output swing. These amplifiers are a cost−effective solution for applications where low power consumption and space-saving packages are critical. Specification tables are provided for operation from power supply voltages at 2.7 V and 5 V. Rail−to−Rail operation provides improved signal−to−noise performance.

 

LMV321 Op-Amp Pinout Configuration 

Pin Number	Pin Name	Description
1	OUT A	Output of Op-Amp A
2	IN A−	Inverting Input of Op-Amp A
3	IN A+	Non Inverting Input of Op-Amp A
4	V−	Ground or Negative(Dual Polarity Supply)
5	IN B+	Non Inverting Input of Op-Amp B
6	IN B−	Inverting Input of Op-Amp B
7	+OUT B	Output of Op-Amp B
8	V+	Supply Voltage

 

Features & Specifications

• Operation from 2.7 V to 5.0 V Single−Sided Power Supply
• LMV321 Single Available in Ultra Small 5 Pin SC70 Package
• No Output Crossover Distortion
• Rail−to−Rail Output
• Low Quiescent Current: LMV358 Dual − 220 A, Max per Channel
• No Output Phase−Reversal from Overdriven Input
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
• These Devices are Pb−Free, Halogen Free/BFR Free, and are RoHS Compliant

 

Note: Complete Technical Details can be found in the LMV321 datasheet given at the end of this page.

 

LMV321 Equivalent Op-Amp 

LM324, AD8222, LM358, LM393, LF353

 

Where to use LMV321 Op-Amp

The LMV321 is a Dual Package Operational Amplifier, meaning it has two Op-Amps inside it, this op-amp has many optional features that we will discuss later.

These amplifiers are a cost−effective solution for applications where low power consumption and space-saving packages are critical. Specification tables are provided for operation from power supply voltages at 2.7 V and 5 V. Rail−to−Rail operation provides improved signal−to−noise performance and ultra-low quiescent current makes this series of amplifiers ideal for portable, battery-operated equipment. The common-mode input range includes ground making the device useful for low−side current−shunt measurements. The ultra-small packages allow for placement on the PCB in close proximity to the signal source thereby reducing noise pickup.

 

How to use LMV321 Op-Amp

We can use this IC for general purpose applications like Weigh scales, comparators, adders, subtractors. A test of a non-inverting op-amp configuration is shown below.

In the above, the LMV321 Op-amp is configured as a non-inverting configuration. The gain of the op-amp is set to 10. For that we have used a 1K resistor and a 9.1K resistor, as you can see for the simulation we have used a variable potentiometer by varying the potentiometer we can vary the input voltage and the output voltage will also vary, to power the op-amp we have used +12V and -12V supply, as the gain of the op-amp is 10 so if we provide 1V at the input we will get 10V at the output the simulated circuit shows exactly that.

 

Applications

• Weigh scales
• ECG and medical instrumentation
• Notebook Computers and PDA’s
• Portable Battery−Operated Instruments
• Active Filters

 

2D Model and Dimensions

If you are designing a PCB or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions.