Texas Instruments PCMD3180/PCMD3180-Q1 8-Channel Audio ADC
Texas Instruments PCMD3180/PCMD3180-Q1 8-Channel Audio Analog-to-Digital Converter (ADC) is a high-performance, pulse-density-modulation (PDM) input to time-division multiplexing (TDM) or I2S output converter. It supports simultaneous sampling of up to eight digital channels for the PDM microphone input. The device integrates programable digital volume control, a microphone bias voltage, and a phase-locked loop (PLL). It also includes a programmable high-pass filter (HPF), bi-quad filters, and low-latency filter modes and allows for output sample rates up to 768kHz. The Texas Instruments PCMD3180 supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats and can be controlled with the I2C or SPI interfaces.
The PCMD3180/PCMD3180-Q1 also supports master and slave mode selection for the audio bus interface operation. These integrated high-performance features and the ability to be powered from a single supply of 3.3V or 1.8V make the device an excellent choice for space-constrained audio systems in far-field microphone recording applications. The PCMD3180/PCMD3180-Q1 is specified from –40°C to +125°C and is available in a 24-pin WQFN package. The PCMD3180-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- 8-channel PDM microphones simultaneous conversion
- PDM input to TDM or I2S output converter performance
- 127dB dynamic range (DR) with high-performance 5th-order PDM input
- 117dB dynamic range (DR) with high-performance 4th-order PDM input
- Channel summing mode, DR performance with high-performance 4th-order PDM input
- 120dB, 2-channel summing
- 123dB, 4-channel summing
- Programmable PDM clock output
- 768kHz to 6.144MHz
- Programmable output sample rate (fS)
- 8kHz to 768kHz
- Programmable channel settings
- –100dB to 27dB digital volume control
- Gain calibration with 0.1dB resolution
- Phase calibration with 163ns resolution
- Microphone bias or supply voltage generation
- Low-latency signal processing filter selection
- Programmable HPF and bi-quad digital filters
- I2C or SPI controls
- Integrated high-performance audio PLL
- Automatic clock divider setting configurations
- Audio serial data interface
- TDM, I2S, or left-justified (LJ) formats
- 16 bits, 20 bits, 24 bits, or 32 bits word length
- Master or slave interface
- 3.3V or 1.8V single-supply operation
- 3.3V or 1.8V I/O-supply operation
- Power consumption for 1.8V supply
- 2.9mW/channel at 16kHz sample rate
- 2.5mW/channel at 48kHz sample rate
Applications
- Video doorbell
- Smart speakers
- Building security gateway
- IP network cameras
- GPS personal navigation device
- Video conference systems
Datasheets
Functional Block Diagram
Additional Resource
Opublikowano: 2020-08-10
| Zaktualizowano: 2025-05-06