Overview
The TS472IQT is a differential-input microphone preamplifier designed by STMicroelectronics, optimized for high-performance audio systems in personal digital assistants (PDAs) and notebook computers. This device is renowned for its low noise characteristics and adjustable gain, making it suitable for various audio applications. The TS472IQT features an adjustable gain from 0 to 40 dB, excellent power-supply and common-mode rejection ratios, and a very low noise microphone bias generator of 2.0 V. It also includes a complete shutdown function with an active low standby mode, enhancing its power efficiency and operational flexibility.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.2 to 5.5 | V |
| Operating Temperature | -40 to +85 | °C |
| Equivalent Input Noise Voltage Density | 10 | nV/√Hz (at 1 kHz) |
| Total Harmonic Distortion + Noise (THD+N) | 0.1% | (20 Hz ≤ F ≤ 20 kHz, gain = 20 dB, Vin = 50 mVRMS) |
| Bandwidth | 40 kHz | |
| Input Impedance | 80 to 120 kΩ | |
| Supply Current (at 20 dB gain) | 1.8 to 2.4 mA | |
| Standby Current | 1 μA | |
| ESD Protection | 2 kV (Human Body Model) | |
| Package Types | Flip-chip lead-free, QFN24 4 x 4 mm |
Key Features
- Low noise 2.0 V microphone bias output
- Fully-differential input/output
- Adjustable gain from 0 to 40 dB
- Low distortion: 0.1% typical
- Low power consumption: 1.8 mA at 20 dB gain
- Fast start-up time: 5 ms typical at 0 dB
- Active low standby mode function (1 μA max)
- ESD protection (2 kV Human Body Model)
- Available in flip-chip lead-free package and QFN24 4 x 4 mm package
Applications
- Video and photo cameras with sound input
- Sound acquisition and voice recognition systems
- Video conference systems
- Notebook computers and PDAs
- Personal electronics requiring high-quality audio input
Q & A
- What is the primary function of the TS472IQT?
The TS472IQT is a differential-input microphone preamplifier designed to amplify low-level audio signals from microphones with high fidelity and low noise.
- What is the adjustable gain range of the TS472IQT?
The gain of the TS472IQT is adjustable from 0 to 40 dB.
- What is the typical equivalent input noise voltage density of the TS472IQT?
The typical equivalent input noise voltage density is 10 nV/√Hz at 1 kHz.
- What are the operating temperature ranges for the TS472IQT?
The operating temperature range is from -40°C to +85°C.
- What types of packages are available for the TS472IQT?
The TS472IQT is available in flip-chip lead-free packages and QFN24 4 x 4 mm packages.
- What is the standby current of the TS472IQT?
The standby current is 1 μA maximum.
- Does the TS472IQT have ESD protection?
Yes, it has ESD protection up to 2 kV (Human Body Model).
- What is the typical supply current at 20 dB gain for the TS472IQT?
The typical supply current at 20 dB gain is 1.8 mA.
- What are some common applications for the TS472IQT?
Common applications include video and photo cameras with sound input, sound acquisition and voice recognition systems, video conference systems, and notebook computers and PDAs.
- How does the TS472IQT manage power efficiency?
The TS472IQT includes an active low standby mode function to minimize power consumption when not in use.
