ADAU7118ACPZRL 8-Channel PDM to I2S/TDM Converter Data Sheet

Overview

• Part Number: ADAU7118ACPZRL
• Manufacturer: Analog Devices
• Description: 8-Channel PDM to I2S/TDM Converter
• Package: 16-Lead LFCSP (3 mm × 3 mm)

Features

• 8 channels of PDM audio inputs from digital microphones
• 16×, 32×, or 64× decimation ratio of PDM to PCM audio data
• 24-bit resolution to support high sound pressure level (SPL) microphones
• 126 dB A-weighted SNR
• 4 kHz to 192 kHz output sampling rate
• Bit clock rates of 64×, 128×, 192×, 256×, 384×, or 512× the output sampling rate
• Dual output PDM clocks
• Automatic PDM clock generation
• Automatic power-down when BCLK removed
• Selectable I2C control or hardware mode operation
• 1.2 mA DVDD operating current for 8 channels at 48 kHz frequency sampling rate and 1.8 V supply
• Slave I2S or TDM output interface
• Up to TDM-16 supported
• Configurable TDM slot routing and sizes
• I/O supply voltage from 1.70 V to 3.63 V
• DVDD supply voltage from 1.10 V to 1.98 V
• <5 μA typical DVDD shutdown current
• Power-on reset

Applications

• Microphone arrays
• Mobile computing
• Portable electronics
• Consumer electronics
• Professional electronics

Key Specifications

• Input Voltage: High Level (VIH) and Low Level (VIL) based on IOVDD
• Input Leakage: High Level (IIH) and Low Level (IIL) at 0 V
• Input Capacitance: 2 pF
• Output Voltage: High Level (VOH) and Low Level (VOL) based on IOVDD
• Output Drive Strength: Nominal drive strength settings at different IOVDD voltages
• Dynamic Range: 126 dB (20 Hz to 20 kHz, −60 dB input, A-weighted filter (rms), relative to 0 dBFS output)
• Signal-to-Noise-Ratio (SNR): 126 dB (A-weighted filter, fifth-order input, relative to 0 dBFS output)
• Decimation Ratio: 16× to 64×
• Frequency Response: −0.1 to +0.01 dB DC to 0.45 × output sampling rate (fS)
• Stop Band: 0.566 × fS Hz
• Stop Band Attenuation: 75 dB
• Group Delay: 4.47 to 5.83 FSYNC cycles depending on decimation ratio
• Gain: 0 dB (PDM to PCM)
• Bit Resolution: 24-bits internal and output
• Interchannel Phase: 0 degrees

Electrical Characteristics

• Supply Voltage: Digital Voltage (DVDD Pin) 1.10 V to 1.98 V, I/O Supply Voltage (IOVDD Pin) 1.70 V to 3.63 V
• Supply Current: I/O Current and Digital Current (DVDD Pin) depending on operation state and supply voltage
• Shutdown Current: Typical values provided for different conditions

Serial Ports

• FSYNC Frequency: 192 kHz
• BCLK Frequency: 24.576 MHz
• SDATA Delay: Timing specifications provided for different IOVDD voltages and drive strengths

I2C Interface—Slave

• SCL Clock Frequency: 1000 kHz
• Timing Specifications: Provided for SCL pulse width high, low, start and repeated start condition setup time, data setup time, and more

PDM Inputs

• Timing Requirements: Data setup time and data hold time specified

Absolute Maximum Ratings

• DVDD to Ground: 1.98 V
• IOVDD to Ground: 3.63 V
• Digital Inputs: GND to −0.3 V to IOVDD + 0.3 V
• Maximum Operating Ambient Temperature Range: −40°C to +85°C
• Junction Temperature Range: −65°C to +165°C
• Storage Temperature Range: −65°C to +150°C
• Soldering (60 sec): 300°C
• Electrostatic Discharge (ESD) Susceptibility: 4.5 kV

Thermal Resistance

• Package Type: θJA and θJC values provided for different thermal test board configurations

Ordering Information

• Model: ADAU7118ACPZRL
• Temperature Range: −40°C to +85°C
• Package Description: 16-Lead LFCSP, 13” Tape and Reel
• Marking Code: Y70 CP-16-22