Overview
The PCM6340-Q1, produced by Texas Instruments, is a high-performance, 4-channel audio analog-to-digital converter (ADC) designed specifically for automotive applications. This device is part of the PCM6xx0-Q1 family, which includes both 4-channel and 6-channel variants. The PCM6340-Q1 supports analog input signals up to 10 V RMS and features integrated high-voltage, programmable microphone bias and input diagnostic circuitry. This makes it an excellent choice for space-constrained automotive systems requiring high-fidelity audio processing.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of Channels | 4 |
| Resolution | 16 bits, 20 bits, 24 bits, 32 bits |
| Sampling Rate | 8 kHz to 768 kHz |
| Data Interface | I2C, SPI |
| Voltage Supply | 3.3 V (single supply), I/O supply: 3.3 V or 1.8 V |
| Operating Temperature Range | -40°C to 125°C |
| Package | WQFN (RTV) with 32 pins |
| ADC Input Voltage | Differential: 10 V RMS, Single-ended: 5 V RMS |
| Dynamic Range | Line and microphone differential input: 110 dB |
| THD+N | -95 dB |
| Power Consumption | < 20 mW/channel at 48 kHz |
Key Features
- AEC-Q100 qualified for automotive applications
- Integrated high-voltage, programmable microphone bias with efficient boost converter or external high-voltage supply (HVDD)
- Input diagnostic circuitry for fault detection (open inputs, shorted inputs, short to ground, MICBIAS or VBAT, and microphone bias over current protection)
- Programmable channel gain (0 dB to 42 dB, 1-dB steps) and digital volume control (-100 dB to 27 dB)
- Gain calibration with 0.1-dB resolution and phase calibration with 163-ns resolution
- Low-latency signal processing with programmable HPF and biquad digital filters
- Support for TDM, I2S, or left-justified (LJ) audio formats with word lengths of 16, 20, 24, or 32 bits
- I2C or SPI control interface
- Single-supply operation at 3.3 V with I/O supply operation at 3.3 V or 1.8 V
Applications
The PCM6340-Q1 is designed for high-performance audio processing in automotive systems. It is particularly suited for applications such as:
- Automotive infotainment systems
- Voice recognition and hands-free phone systems
- Active noise cancellation systems
- Advanced driver-assistance systems (ADAS) requiring high-fidelity audio inputs
Q & A
- What is the primary application of the PCM6340-Q1?
The PCM6340-Q1 is primarily designed for automotive applications, particularly for high-fidelity audio processing in infotainment and voice recognition systems.
- What are the supported audio formats by the PCM6340-Q1?
The device supports TDM, I2S, and left-justified (LJ) audio formats.
- What is the range of sampling rates supported by the PCM6340-Q1?
The PCM6340-Q1 supports sampling rates from 8 kHz to 768 kHz.
- What types of input configurations are supported by the PCM6340-Q1?
The device supports both single-ended and differential input configurations.
- How does the PCM6340-Q1 handle microphone bias?
The PCM6340-Q1 features an integrated high-voltage, programmable microphone bias that can be generated using an efficient boost converter or an external high-voltage supply (HVDD).
- What diagnostic capabilities does the PCM6340-Q1 have?
The device includes input diagnostic circuitry for detecting open inputs, shorted inputs, shorts to ground, MICBIAS or VBAT, and microphone bias over current protection.
- What is the operating temperature range of the PCM6340-Q1?
The operating temperature range is -40°C to 125°C.
- What are the power consumption characteristics of the PCM6340-Q1?
The power consumption is less than 20 mW per channel at a 48 kHz sampling rate.
- What interfaces are available for controlling the PCM6340-Q1?
The device can be controlled using either the I2C or SPI interface.
- Is the PCM6340-Q1 qualified for automotive use?
Yes, the PCM6340-Q1 is AEC-Q100 qualified for automotive applications.
- What is the package type and pin count of the PCM6340-Q1?
The device is packaged in a WQFN (RTV) package with 32 pins.
