Low Noise Op Amps

Low noise op amps from National Semiconductor offer ultra low noise specifications combined with precision specifications such as low offset voltage, low offset voltage drift, low input bias current, and low power consumption.

Low Noise Op Amp Selection Chart

See all low noise op amps

The tables below highlight some of National’s industry-leading low noise amplifier products by end application.

Sensing and Detection Applications

National's low voltage noise amplifiers are suitable for a wide variety of sensor applications including different types of pressure sensors such as gage pressure, absolute pressure, differential pressure and vacuum pressure. These applications require low voltage noise, low input bias current and low offset voltage operational amplifiers.

	Voltage Noise	Input Bias Current	Vos (max)	Vmin	Vmax	Features
LMP7715	5.8 nV/vHz	0.1 pA	150 uV	1.8V	5.5V	Precision with CMOS input stage
LMP7704	9 nV/vHz	0.2 pA	200 uV	2.7V	12V	CMOS Input, RRIO, Wide Supply Range Amplifier

Medical Applications

Medical applications, such as blood pressure monitors, dialysis machines, and portable medical instruments, generally require precision specifications such as low voltage noise, low input offset voltage, and a wide dynamic range. National’s high performance precision products offer the latest solutions for accurate and reliable medical diagnosis equipment.

	Voltage Noise	CMRR (min)	Vos (max)	Vmin	Vmax	Features
LMP7731	3.3 nV/vHz	105 dB	40 µV	1.8 V	5.5 V	Low 3.3nV/vHz noise at 3Hz. Ideal for precision, low noise, low voltage applications.
LMP7711	5.8 nV/vHz	85 dB	150 µV	1.8 V	5.5 V	17 MHz, low noise CMOS input with enable pin

Automotive Applications

Automotive applications, such as crash detection, active noise cancellation, and navigation, generally require low voltage noise, low offset voltage, low input bias current, and low offset voltage drift. National offers an increasing number of AEC-Q100-compliant devices and provides the latest solutions making automobiles more efficient, safer, and greener.

	Noise	Vmin	Vmax	Vos (max)	TCVos (max)	Ib	Features
LMP7716	5.8 nV/vHz	1.8 V	5.5 V	150 uV	4 µV/°C	0.2 pA	Dual amplifier with CMOS input

Useful Links

• Amplifiers featured site & design resources
• Precision amplifier parametric table
• Low power ADCs
• Low power DACs

Sensing & Detection Application Diagrams

• Pressure and Load Sensing Applications
• Temperature Sensing Applications
• Optical Sensing Applications
• Other Sensor Applications

Automotive Application Diagrams

Articles

• "Maximizing Signal-Path Performance", Signal Path Designer #102