Overview
The ADA4350ARUZ, produced by Analog Devices Inc., is a highly versatile analog front end (AFE) designed for use with photodetectors or other sensors that produce a current proportional to the sensed parameter or voltage input. This integrated circuit (IC) is particularly suited for applications requiring precise gain levels to maximize dynamic range. It integrates a FET input amplifier, a switching network, and an ADC driver, all of which can be controlled via a serial peripheral interface (SPI) or parallel control logic. The ADA4350ARUZ is known for its low voltage and current noise, making it an excellent choice for precision data acquisition systems and various sensor applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 3.3 | - | 12 | V |
| Quiescent Current (±5 V full system) | - | 8.5 | - | mA |
| Positive Power Supply Rejection Ratio | 90 | - | 109 | dB |
| Negative Power Supply Rejection Ratio | 86 | - | 109 | dB |
| Input Resistance (VIN1 and REF) | 200 | - | - | MΩ |
| Input Capacitance (VIN1 and REF) | 1.4 | - | - | pF |
| Output Voltage Swing (RL = no load, single-ended) | ±4.8 | ±4.83 | ±4.83 | V |
| Linear Output Current (VOUT = 2 V p-p, 60 dB SFDR) | 18 | - | - | mA rms |
| Short-Circuit Current (sinking/sourcing) | 32/38 | - | - | mA |
Key Features
- FET input amplifier with very low voltage and current noise, making it suitable for a wide range of photodetectors and sensors.
- Switching network allowing individual selection of up to six different, externally configurable feedback networks.
- ADC driver capable of operating in single-ended or differential mode, ideal for driving the input of an ADC.
- Operates from a single +3.3 V supply or a dual ±5 V supply, offering flexibility in detector polarity.
- Digital control via SPI or parallel control logic.
- Pb-free, 28-lead TSSOP package.
Applications
- Current to voltage (I to V) conversions.
- Photodiode preamplifiers.
- Chemical analyzers.
- Mass spectrometry.
- Molecular spectroscopy.
- Laser/LED receivers.
- Data acquisition systems.
Q & A
- What is the ADA4350ARUZ primarily used for?
The ADA4350ARUZ is primarily used as an analog front end for photodetectors or other sensors that produce a current proportional to the sensed parameter or voltage input.
- What are the operating voltage ranges for the ADA4350ARUZ?
The ADA4350ARUZ operates from a single +3.3 V supply or a dual ±5 V supply.
- What is the quiescent current of the ADA4350ARUZ?
The quiescent current is typically 8.5 mA for a ±5 V full system.
- What are the key features of the FET input amplifier in the ADA4350ARUZ?
The FET input amplifier has very low voltage and current noise, making it suitable for a wide range of photodetectors and sensors.
- How can the gain levels be controlled in the ADA4350ARUZ?
The gain levels can be controlled via a switching network that allows individual selection of up to six different, externally configurable feedback networks.
- What types of output modes does the ADA4350ARUZ support?
The ADA4350ARUZ supports both single-ended and differential output modes.
- What is the typical linear output current of the ADA4350ARUZ?
The typical linear output current is 18 mA rms for VOUT = 2 V p-p, 60 dB SFDR.
- What are some common applications of the ADA4350ARUZ?
Common applications include current to voltage conversions, photodiode preamplifiers, chemical analyzers, mass spectrometry, molecular spectroscopy, laser/LED receivers, and data acquisition systems.
- What package type is the ADA4350ARUZ available in?
The ADA4350ARUZ is available in a Pb-free, 28-lead TSSOP package.
- How is the ADA4350ARUZ controlled?
The ADA4350ARUZ can be controlled via a serial peripheral interface (SPI) or parallel control logic.
