Overview
The TS4975EIJT from STMicroelectronics is a stereo audio headphone driver designed for high-performance audio applications. This device is capable of delivering up to 102mW per channel of continuous average power into a 16Ω single-ended load with 1% THD+N from a 5V power supply. It features an I²C bus control interface, allowing for digital volume control and various output mode selections. The TS4975EIJT is packaged in a compact 1.8mm x 2.3mm Flip Chip package, making it ideal for space-conscious portable applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.5 to 5.5 | V |
| Output Power (per channel) | Up to 102mW @ 1% THD+N, F = 1kHz, RL = 16Ω | mW |
| Load Resistor (RL) | >16 Ω | Ω |
| Operating Temperature Range | -40 to +85 | °C |
| Standby Current (ISTBY) | 0.6 to 2 μA | μA |
| Digital Gain Range | -34 to +18 dB | dB |
| Digital Gain Step Size | 4 dB | dB |
| Input Impedance (Zin) | 25.5 to 34.5 kΩ | kΩ |
| Wake Up Time (twu) | 90 to 180 ms | ms |
| Standby Time (tws) | 1 μs | μs |
Key Features
- I²C bus control interface for digital volume control and output mode selection
- Ultra-low consumption in standby mode: 0.6 μA
- 14-step digital volume control with a range from -34 dB to +18 dB
- 9 different output mode selections
- Pop & click noise reduction circuitry
- Phantom ground configuration to avoid bulky capacitors on the outputs
- Internal thermal shutdown protection mechanism
- Compact Flip Chip package (1.8mm x 2.3mm) suitable for portable applications
Applications
- Mobile phones (cellular / cordless)
- PDAs
- Laptop/notebook computers
- Portable audio devices
Q & A
- What is the maximum output power of the TS4975EIJT?
The TS4975EIJT can deliver up to 102mW per channel of continuous average power into a 16Ω single-ended load with 1% THD+N from a 5V power supply.
- What is the operating voltage range of the TS4975EIJT?
The operating voltage range is from 2.5V to 5.5V.
- How does the TS4975EIJT control volume?
The volume is controlled digitally through an I²C bus interface.
- What is the standby current of the TS4975EIJT?
The standby current is between 0.6 μA and 2 μA.
- What are the key applications of the TS4975EIJT?
The key applications include mobile phones, PDAs, laptop/notebook computers, and portable audio devices.
- What is the package type of the TS4975EIJT?
The TS4975EIJT is packaged in a 1.8mm x 2.3mm Flip Chip package.
- Does the TS4975EIJT have thermal protection?
- How many steps are in the digital volume control of the TS4975EIJT?
The digital volume control has 14 steps.
- What is the digital gain range of the TS4975EIJT?
The digital gain range is from -34 dB to +18 dB.
- Does the TS4975EIJT have noise reduction features?
