Core parameters

Features

• Ultra-low power design

  • 45μA/channel quiescent current is very suitable for battery-powered devices to extend battery life.

• Rail-to-Rail Input and Output (RRIO)

  • It can maximize the signal dynamic range and achieve full signal amplification even at low voltage.

• High precision and low offset

  • Input offset voltage as low as 0.5mV reduces measurement errors and improves system accuracy.

• Low noise

  • The low noise characteristic of 27nV/√Hz is suitable for processing weak analog signals and improving the signal-to-noise ratio.

• Wide operating voltage range

  • It can operate under a single power supply of 2.1V~5.5V and is compatible with 3.3V and 5V system designs.

Typical application scenarios

• Portable medical devices

  • Such as heart rate monitoring, blood glucose meter, body temperature measurement and other low-power instruments.

• Sensor signal conditioning

  • Suitable for analog sensor interfaces such as temperature, humidity, pressure, and photoelectricity.

• Battery-powered measuring instruments

  • Used for multi-channel signal acquisition and amplification, ensuring accuracy and low power consumption.

• Low frequency filtering and amplification

  • Provide high-quality amplification in low-frequency signal processing such as audio and environmental monitoring.

• Industrial and consumer embedded systems

  • Analog front end suitable for 3.3V or 5V MCU systems.

Performance Comparison

The OPA2348AIDCNR significantly outperforms the traditional general-purpose amplifier LM358 in terms of low power consumption and high precision, making it more suitable for modern portable electronic devices.

Manufacturer Profile: Texas Instruments (TI)

TI is a leading global manufacturer of analog and embedded processing chips. Its OPA series op amps offer a wide range of low-noise, high-speed, and low-power options. The OPA2348 series targets low-power, high-precision applications, combining rail-to-rail input and output with ultra-low quiescent current. It is widely used in medical, industrial, and consumer electronics.

Why choose the OPA2348AIDCNR?

● Low power consumption (45μA/channel) extends battery life

● Rail-to-rail input and output maintain high dynamic range at low voltages

● High-precision low offset (0.5mV) for precision measurements

● Low noise (27nV/√Hz) improves signal quality

● Small SOT-23 package for high-density PCB layout

● Industrial temperature range for harsh environments

Frequently Asked Questions (FAQ)

Q1: Is the OPA2348AIDCNR suitable for low-voltage single-supply applications?
Yes, the OPA2348AIDCNR is a low-power, precision dual-channel operational amplifier with an operating voltage range of 2.1V to 5.5V. It is stable in common 3.3V and 5V single-supply systems. Its input common-mode range includes the negative supply rail, and its rail-to-rail output capability fully utilizes the dynamic range of low-voltage systems, making it ideal for battery-powered and portable devices and low-power sensor interfaces.

Q2: Can it directly drive an ADC?
Yes, the OPA2348AIDCNR features rail-to-rail output characteristics and low output impedance, allowing it to directly drive the inputs of most successive approximation register (SAR) or delta-sigma (ΔΣ) ADCs without the need for an additional buffer amplifier . To ensure signal integrity and sampling accuracy, the design simply requires configuring the output filtering network appropriately based on the ADC’s sampling rate and input capacitance.

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