Overview
The TS4994IST, produced by STMicroelectronics, is a 1W differential input/output audio power amplifier designed for high-quality audio applications. It is capable of delivering 1W of continuous RMS output power into an 8Ω load at 5V. The amplifier features differential inputs, which provide outstanding noise immunity. It also includes a selectable standby mode, ultra-low consumption in standby, and an ultra-fast startup time of 15ms. The TS4994IST is available in DFN10 3x3 and MiniSO-8 packages, all of which are lead-free.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2.5 | - | 5.5 | V |
| Output Power (Pout) @ VCC = 5V, THD = 1%, F = 1kHz, RL = 8Ω | - | - | 1 | W |
| Supply Current (ICC) @ No input signal, no load | 3 | 7 | - | mA |
| Standby Current (ISTBY) @ VSTBY = GND or VCC, RL = 8Ω | 10 | - | 1000 | nA |
| Differential Output Offset Voltage (Voo) @ No input signal, RL = 8Ω | 0.1 | - | 10 | mV |
| Power Supply Rejection Ratio (PSRRIG) @ F = 217Hz, RL = 8Ω, AV = 1 | - | - | 100 | dB |
| Common Mode Rejection Ratio (CMRR) @ F = 217Hz, RL = 8Ω, AV = 1 | - | - | 90 | dB |
| Wake-up Time (tWU) @ Cb = 1μF | - | 15 | - | ms |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Differential inputs for outstanding noise immunity
- Near-zero pop & click
- Ultra-low consumption in standby mode (10nA)
- Selectable standby mode (active low or active high)
- Ultra-fast startup time: 15ms typical
- Internal thermal shutdown protection
- Common mode feedback circuitry to maintain output bias at VCC/2
- High power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR)
- Available in DFN10 3x3 and MiniSO-8 packages, all lead-free
Applications
- Mobile phones (cellular / cordless)
- Laptop / notebook computers
- PDAs
- Portable audio devices
Q & A
- What is the maximum output power of the TS4994IST? The TS4994IST can deliver up to 1W of continuous RMS output power into an 8Ω load at 5V.
- What are the key features of the TS4994IST? Key features include differential inputs, near-zero pop & click, ultra-low standby current, selectable standby mode, and ultra-fast startup time.
- What are the available packages for the TS4994IST? The TS4994IST is available in DFN10 3x3 and MiniSO-8 packages.
- What is the operating temperature range of the TS4994IST? The operating temperature range is from -40°C to +85°C.
- How does the TS4994IST handle thermal protection? The device is equipped with internal thermal shutdown protection that activates at 150°C.
- What is the typical wake-up time from standby mode? The wake-up time is typically 15ms.
- What is the power supply rejection ratio (PSRR) of the TS4994IST? The PSRR is up to 100dB at 217Hz with grounded inputs.
- What is the common mode rejection ratio (CMRR) of the TS4994IST? The CMRR is up to 90dB at 217Hz.
- How does the TS4994IST manage common mode voltage? The device uses common mode feedback circuitry to maintain the output bias at VCC/2 regardless of the input common mode voltage.
- What are some typical applications of the TS4994IST? Typical applications include mobile phones, laptop/notebook computers, PDAs, and portable audio devices.
