Overview
The TS472IQT, produced by STMicroelectronics, is a highly advanced differential-input microphone preamplifier designed for high-performance audio systems in personal digital assistants (PDAs) and notebook computers. This device is renowned for its adjustable gain from 0 to 40 dB, excellent power-supply and common-mode rejection ratios, and very low noise characteristics. It operates on a single supply voltage ranging from 2.2 to 5.5 volts and features a low power consumption of 1.8 mA at 20 dB gain. The TS472IQT also includes an active low standby mode, reducing the standby current to 1 μA, and provides a low noise 2.0 V microphone bias output.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.2 | - | 5.5 | V |
| Operating Temperature | -40.0 | - | 85.0 | °C |
| Equivalent Input Noise Voltage Density | - | 10 | - | nV/√Hz |
| Total Harmonic Distortion + Noise (THD+N) | - | 0.1 | - | % |
| Bandwidth at -3 dB | - | 40 | - | kHz |
| Standby Current | - | 1 | - | μA |
| Power Supply Rejection Ratio (PSRR) | -70 | -46 | - | dB |
| ESD Protection | - | - | 2 kV | - |
| Package Name | - | - | VFQFPN2 24 4x4x1.0 | - |
Key Features
- Adjustable gain from 0 to 40 dB with excellent power-supply and common-mode rejection ratios.
- Very low noise: 10 nV/√Hz typical equivalent input noise at F = 1 kHz.
- Fully-differential input/output configuration.
- Low power consumption: 1.8 mA at 20 dB gain.
- Fast start-up time: 5 ms typical at 0 dB gain.
- Low distortion: 0.1% typical.
- Active low standby mode function with a standby current of 1 μA maximum.
- Low noise 2.0 V microphone bias output.
- 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.
Q & A
- What is the operating voltage range of the TS472IQT?
The TS472IQT operates on a single supply voltage ranging from 2.2 to 5.5 volts.
- What is the typical equivalent input noise voltage density of the TS472IQT?
The typical equivalent input noise voltage density is 10 nV/√Hz at F = 1 kHz.
- What is the standby current of the TS472IQT?
The standby current is 1 μA maximum.
- What is the bandwidth of the TS472IQT at -3 dB?
The bandwidth at -3 dB is 40 kHz regardless of the gain.
- Does the TS472IQT have ESD protection?
- What are the typical applications of the TS472IQT?
The TS472IQT is typically used in video and photo cameras with sound input, sound acquisition and voice recognition systems, video conference systems, and notebook computers and PDAs.
- How is the gain of the TS472IQT adjusted?
The gain can be adjusted from -1.5 dB to 41 dB by connecting an external grounded resistor RGS to the GS pin.
- What is the power consumption of the TS472IQT at 20 dB gain?
The power consumption is 1.8 mA at 20 dB gain.
- Can the TS472IQT be used in a single-ended input configuration?
- What is the thermal resistance junction to ambient for the QFN24 package?
The thermal resistance junction to ambient for the QFN24 package is 110 °C/W.
