The Texas Instruments PCM1840IRTWR is a high-performance, quad-channel, 32-bit Burr-Brown™ audio analog-to-digital converter (ADC) designed for professional audio recording, multichannel microphone arrays, and embedded audio systems. Supporting simultaneous sampling of four analog input channels and sample rates from 8kHz to 192kHz, this device delivers high-quality audio conversion in a compact 24-pin WQFN package.
The PCM1840IRTWR supports differential analog microphone and line-level inputs with a 2V RMS full-scale input voltage. It provides up to 123dB dynamic range with the dynamic range enhancer enabled, 113dB with the enhancer disabled, and -98dB total harmonic distortion plus noise (THD+N), enabling accurate audio signal capture with low distortion.
The device offers flexible digital audio connectivity through TDM, I²S, and left-justified serial formats. Its 32-bit TDM interface supports four-channel audio data transmission, while I²S and left-justified formats support two-channel operation. Hardware pin configuration allows convenient selection of audio formats, master or slave operation, and digital filter characteristics.
To simplify system integration, the PCM1840IRTWR includes an integrated 2.75V low-noise microphone bias output, high-performance audio phase-locked loop (PLL), DC-removal high-pass filter, and selectable linear-phase or low-latency digital filters. Automatic power-down upon loss of audio clocks further supports efficient system operation.
Operating from a nominal 3.3V analog supply with selectable 1.8V or 3.3V digital I/O supply, the PCM1840IRTWR offers low power consumption of approximately 18.4mW per channel at a 48kHz sample rate. Its operating temperature range of -40°C to +125°C makes it suitable for a wide variety of audio applications.
Housed in a 24-pin WQFN package measuring 4 × 4mm, the PCM1840IRTWR is ideal for far-field voice capture, microphone arrays, professional audio interfaces, conferencing equipment, and space-constrained audio acquisition systems.
Key Specifications:
- Manufacturer: Texas Instruments (TI)
- Part Number: PCM1840IRTWR
- Product Family: Burr-Brown™ Audio ADC
- Product Type: Audio Analog-to-Digital Converter
- Number of ADC Channels: 4
- ADC Resolution: 32-Bit
- Sampling Rate: 8kHz to 192kHz
- Maximum Sampling Rate: 192kHz
- Dynamic Range: 123dB (Enhancer Enabled)
- Dynamic Range: 113dB (Enhancer Disabled)
- THD+N: -98dB
- Typical SNR: 122dB (TI Product Parameter)
- Analog Input Type: Differential Microphone / Line Input
- Full-Scale Input Voltage: 2V RMS (Differential)
- Digital Audio Interfaces: TDM, I²S, Left-Justified
- Four-Channel Audio Output: 32-Bit TDM
- Two-Channel Audio Output: 32-Bit I²S / TDM / Left-Justified
- Interface Operation: Master / Slave
- Control Configuration: Hardware Pin Control
- Analog Supply Voltage (AVDD): 3.3V Nominal
- Digital I/O Supply (IOVDD): 1.8V or 3.3V Nominal
- Microphone Bias Output: 2.75V
- Integrated Functions: Audio PLL, High-Pass Filter, Dynamic Range Enhancer
- Digital Filter Options: Linear-Phase / Low-Latency
- Power Consumption: 17.0mW/Channel at 16kHz
- Power Consumption: 18.4mW/Channel at 48kHz
- Power Management: Automatic Power-Down on Clock Loss
- Operating Temperature: -40°C to +125°C
- Package: WQFN-24 (RTW)
- Number of Pins: 24
- Package Dimensions: 4 × 4mm
- Mounting Type: Surface Mount (SMD/SMT)
- Moisture Sensitivity Level: MSL 1
- Compliance: RoHS and REACH
- Packaging: Tape & Reel
- Standard Reel Quantity: 3,000 Pieces
- Product Status: Active
Typical Applications:
- Multichannel microphone arrays
- Far-field voice capture systems
- Professional audio recording equipment
- Digital conferencing systems
- Smart speakers and voice-controlled devices
- Embedded audio acquisition
- Industrial audio monitoring
- Digital audio interfaces
- High-quality microphone input systems
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