PCM6340-Q1

• AEC-Q100 qualified for automotive applications
  • Temperature grade 1: –40°C ≤ T_A ≤ +125°C
• ADC performance:
  • Line differential input dynamic range: 110 dB
  • Microphone differential input dynamic range: 110 dB
  • THD+N: –95 dB
  • Channel summing mode supports high SNR
• ADC input voltage:
  • Differential, 10-V_RMS full-scale inputs
  • Single-ended, 5-V_RMS full-scale inputs
• ADC sample rate (f_S) = 8 kHz to 768 kHz
• Programmable channel settings:
  • Channel gain: 0 dB to 42 dB, 1-dB steps
  • Digital volume control: –100 dB to 27 dB
  • Gain calibration with 0.1-dB resolution
  • Phase calibration with 163-ns resolution
• Programmable microphone bias (5 V to 9 V):
  • With integrated efficient boost converter, or
  • With external high voltage HVDD supply
• Programmable microphone input fault diagnostics:
  • Open inputs or shorted inputs
  • Short to ground, MICBIAS or VBAT
  • Microphone bias over current protection
• Low-latency signal processing filter selection
• Programmable HPF and biquad digital filters
• I²C or SPI controls
• Audio serial data interface:
  • Format: TDM, I²S, or left-justified (LJ)
  • Word length: 16 bits, 20 bits, 24 bits, or 32 bits
  • Master or slave interface
• Single-supply, 3.3-V operation
• I/O supply operation: 3.3 V or 1.8 V
• Power consumption:
  • < 20 mW/channel at 48-kHz

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The 4-channel PCM6x40-Q1 (PCM6240-Q1, PCM6340-Q1) and 6-channel PCM6x60-Q1 (PCM6260-Q1, PCM6360-Q1) are high-performance, audio analog-to-digital converters (ADCs) that support analog input signals up to 10 V_RMS. The PCM6x40-Q1 and PCM6x60-Q1 (PCM6xx0-Q1) support line and microphone inputs, and allows for both single-ended and differential input configurations. These devices offer an integrated high-voltage, programmable microphone bias, and input diagnostic circuitry that allow direct connection to microphone-based automotive systems with full fault diagnostic capability for direct-coupled inputs. The PCM62x0-Q1 integrate an efficient boost converter to generate a high voltage microphone bias using an external, low-voltage, 3.3-V supply, whereas the PCM63x0-Q1 directly uses an external high-voltage supply (HVDD), which is a readily available supply in the system to generate the high-voltage, programmable microphone bias. The PCM6xx0-Q1 integrate the programable channel gain, digital volume control, a low-jitter phase-locked loop (PLL), a programmable high-pass filter (HPF), biquad filters, low-latency filter modes, and allows for sample rates up to 768 kHz. The PCM6xx0-Q1 support time-division multiplexing (TDM), I²S, or left-justified (LJ) audio formats, and can be controlled with either the I²C or SPI interface. These integrated high-performance features, along with a single, 3.3-V supply operation, make the PCM6xx0-Q1 family an excellent choice for space-constrained automotive systems.