The "translator" between the physical world and digital systems, specializing in continuous signal processing, converting natural signals like temperature, sound, and light into precise electrical signals while controlling power output and energy conversion. As the "sensory nerves" of electronic devices, they are irreplaceable in high-fidelity audio, sensor interfaces, power management, and other fields. Core technologies focus on high-precision amplification, low-noise filtering, and high-efficiency voltage regulation, with design challenges far exceeding those of digital chips. In the future, with the deepening of IoT and intelligence, analog chips will deeply integrate with digital systems, enabling smarter energy and autonomous driving scenarios with higher integration and adaptive capabilities, becoming the core link between reality and virtual worlds.
- Analog Chips
Operational Amplifiers (Op Amp)
Function
Process analog signals (amplification, filtering, comparison, etc.).
Representative Products
TI LM358, ADI AD8628.
Features
High gain, low noise, high precision.
Application Scenarios
Audio equipment (microphone signal amplification)
Sensors (converting weak signals to usable voltage)
Medical devices (ECG signal processing)
Power Management ICs
Function
Control power conversion, distribution, and monitoring.
Types
DC-DC Converters (Buck/Boost): e.g., TI LM2596
LDO Regulators (Linear Regulators)
e.g., ST L4931
Battery Management ICs
e.g., Maxim MAX17260
Features
High efficiency, overvoltage/overheat protection, low ripple.
Data Converter Chips
Function
Convert between analog and digital signals.
Types
ADC (Analog-to-Digital Converter), e.g., TI ADS1256 (24-bit high precision)
Features
High sampling rate, low distortion, strong anti-interference capability.
Application Scenarios
Audio equipment (DAC in CD players), industrial control (sensor data acquisition), communication base stations (analog signal digitization).
Analog Switches & Multiplexers
Function
Switch or select analog signal paths.
Representative Products
TI TS3A227E, ADI ADG1411.
Features
Low on-resistance, fast switching, low leakage current.
Application Scenarios
Test instruments (multi-channel signal selection), automotive electronics (AC temperature sensor switching), consumer electronics (phone headphone/speaker switching)
Filter Chips
Function
Remove noise or specific frequency components from signals.
Types
Low-pass/High-pass Filters: e.g., Maxim MAX275
Band-pass Filters
e.g., TI PGA460
Features
Programmable cutoff frequency, high selectivity.
Application Scenarios
Communication equipment (eliminating out-of-band interference), motor drives (suppressing
EMI)
Audio systems (noise-canceling headphones)
Interface Circuit Chips
Function
Connect analog signals with external devices.
Types
RS-485/RS-232 Transceivers: e.g., ADI ADM2485, Isolated Amplifiers: e.g., TI ISO7740
Features
Anti-interference, electrical isolation, long-distance transmission.
Application Scenarios
Industrial fieldbus (PLC communication), medical devices (preventing electric shock
risks),
Smart home (sensor data transmission)