Overview
The TLV320ADC3140 is a high-performance, audio analog-to-digital converter (ADC) from Texas Instruments, part of the Burr-Brown™ series. This device supports simultaneous sampling of up to four analog channels or eight digital channels for pulse density modulation (PDM) microphone inputs. It is designed for applications requiring high-quality audio conversion and flexible interface options. The TLV320ADC3140 integrates various features such as programmable channel gain, digital volume control, microphone bias voltage generation, and high-performance audio PLL, making it suitable for space-constrained audio systems in far-field microphone recording applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Analog Channels | 4 | |
| Number of Digital PDM Channels | 8 | |
| Dynamic Range (A-weighted) | 106 dB | dB |
| Total Harmonic Distortion + Noise (THD+N) | -98 dB | dB |
| Sample Rate (fS) | 8 kHz to 768 kHz | kHz |
| Channel Gain Range | 0 dB to 42 dB, 1-dB steps | dB |
| Digital Volume Control Range | -100 dB to 27 dB | dB |
| Supply Voltage (AVDD) | 3.3 V or 1.8 V | V |
| Power Consumption (per channel at 1.8 V, 48 kHz) | 9.2 mW | mW |
| Package Type | WQFN (24-pin), 4.00 mm × 4.00 mm | |
| Operating Temperature Range | -40°C to +125°C | °C |
Key Features
- Multichannel high-performance ADC supporting 4-channel analog or 8-channel digital PDM microphone inputs.
- ADC line and microphone differential input performance with dynamic range (DR) of 106 dB and THD+N of -98 dB.
- Programmable channel settings including gain (0 dB to 42 dB), digital volume control (-100 dB to 27 dB), and phase calibration.
- Integrated high-performance audio PLL and automatic clock divider setting configurations.
- Audio serial data interface supporting TDM, I2S, or left-justified (LJ) formats with word lengths of 16, 20, 24, or 32 bits.
- I2C or SPI control interface.
- Programmable high-pass filter (HPF) and biquad digital filters.
- Automatic gain controller (AGC).
- Single-supply operation: 3.3 V or 1.8 V.
Applications
- Microphone array systems.
- Voice-activated digital assistants.
- Teleconferencing systems.
- Security and surveillance systems.
Q & A
- What is the maximum sample rate of the TLV320ADC3140?
The TLV320ADC3140 supports sample rates up to 768 kHz. - How many analog and digital channels does the TLV320ADC3140 support?
The device supports up to four analog channels or eight digital PDM channels. - What are the dynamic range and THD+N specifications of the TLV320ADC3140?
The dynamic range is 106 dB, and the THD+N is -98 dB. - What are the supported audio serial data interface formats?
The device supports TDM, I2S, or left-justified (LJ) formats. - What is the power consumption per channel at a 48 kHz sample rate and 1.8 V supply?
The power consumption is approximately 9.2 mW per channel. - What are the operating temperature ranges for the TLV320ADC3140?
The device operates from -40°C to +125°C. - What types of control interfaces are available for the TLV320ADC3140?
The device can be controlled using either I2C or SPI interfaces. - Does the TLV320ADC3140 support programmable microphone bias voltage generation?
Yes, it supports programmable microphone bias or supply voltage generation. - What is the package type and size of the TLV320ADC3140?
The device is offered in a 24-pin WQFN package, 4.00 mm × 4.00 mm with a 0.5-mm pitch. - What are some typical applications of the TLV320ADC3140?
Typical applications include microphone array systems, voice-activated digital assistants, teleconferencing systems, and security and surveillance systems.
