Packaging information
| Package | Pins WQFN (RTW) | 24 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the PCM1840
- Multichannel high-performance ADC:
- 4-channel analog microphones or line-in
- ADC line and microphone
differential input performance:
- Dynamic range:
- 123-dB, dynamic range enhancer enabled
- 113-dB, dynamic range enhancer disabled
- THD+N: –98 dB
- Dynamic range:
- ADC differential 2-VRMS full-scale input
- ADC sample rate (fS) = 8 kHz to 192 kHz
- Hardware pin control configurations
- Linear-phase or low-latency filter selection
- Flexible audio serial data interface:
- Master or slave interface selection
- 32-bits, 4-channel TDM
- 32-bits, 2-channel TDM
- 32-bits, 2-channel I2S
- 32-bits, 2-channel left-justified (LJ)
- Automatic power-down upon loss of audio clocks
- Integrated high-performance audio PLL
- Low-noise MICBIAS 2.75-V output
- Single-supply operation: 3.3 V
- I/O-supply operation: 3.3 V or 1.8 V
- Power consumption for
3.3-V AVDD supply:
- 17.0 mW/channel at 16-kHz sample rate
- 18.4 mW/channel at 48-kHz sample rate
Description for the PCM1840
The PCM1840 is a high-performance, Burr-Brown™ audio analog-to-digital converter (ADC) that supports simultaneous sampling of up to four analog channels. The device supports differential line and microphone inputs with 2-VRMS full-scale signal. The device integrates microphone bias voltage, a phase-locked loop (PLL), a DC removal high-pass filter (HPF), and supports sample rates up to 192 kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats, selectable with the hardware pin level. Additionally, the PCM1840 supports master and slave mode selection for the audio bus interface operation. These integrated high-performance features, along with the ability to be powered from a single supply of 3.3 V, make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications.
The PCM1840 is specified from –40°C to +125°C, and is offered in a 24-pin WQFN package.