Overview
The PCM1808PWR, produced by Texas Instruments, is a high-performance, low-cost, single-chip stereo analog-to-digital converter (ADC). It features single-ended analog voltage inputs and is designed for a wide range of cost-sensitive consumer applications. The device utilizes a delta-sigma modulator with 64-times oversampling, a digital decimation filter, and a high-pass filter to remove the DC component of the input signal. It operates with dual power supplies: 5 V for the analog section and 3.3 V for the digital section. The PCM1808PWR is available in a compact 14-pin TSSOP package and supports both master and slave modes with various data formats in serial audio interfaces.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Sampling Frequency | 8 kHz to 96 kHz | |
| System Clock Frequency | 256 fS, 384 fS, 512 fS | |
| Analog Supply Voltage (VCC) | -0.3 V to 6.5 V | V |
| Digital Supply Voltage (VDD) | -0.3 V to 4 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | 14-Pin TSSOP | |
| THD+N (Typical) | -93 dB | dB |
| SNR (Typical) | 99 dB | dB |
| Dynamic Range (Typical) | 99 dB | dB |
| Oversampling Frequency | x64 | |
| Pass-Band Ripple | ±0.05 dB | dB |
| Stop-Band Attenuation | -65 dB | dB |
Key Features
- 24-Bit Delta-Sigma Stereo A/D Converter
- Single-Ended Voltage Input: 3 Vp-p
- High Performance: THD+N of -93 dB, SNR of 99 dB, and Dynamic Range of 99 dB
- Oversampling Decimation Filter with x64 oversampling
- On-Chip High-Pass Filter: 0.91 Hz (48 kHz)
- Flexible PCM Audio Interface: Master- or Slave-Mode Selectable
- Data Formats: 24-Bit I2S, 24-Bit Left-Justified
- Power Down and Reset by Halting System Clock
- Analog Antialias LPF Included
- Dual Power Supplies: 5 V for Analog, 3.3 V for Digital
- Compact 14-Pin TSSOP Package
Applications
The PCM1808PWR is suitable for a wide variety of cost-sensitive consumer applications that require good performance. These include:
- Audio recording devices
- Home audio systems
- Portable audio players
- Professional audio equipment
- Automotive audio systems
Q & A
- What is the resolution of the PCM1808PWR?
The PCM1808PWR has a resolution of 24 bits.
- What are the supported sampling frequencies for the PCM1808PWR?
The PCM1808PWR supports sampling frequencies from 8 kHz to 96 kHz.
- What are the system clock frequencies for the PCM1808PWR?
The system clock frequencies supported are 256 fS, 384 fS, and 512 fS.
- What are the power supply requirements for the PCM1808PWR?
The device requires a 5 V analog supply voltage (VCC) and a 3.3 V digital supply voltage (VDD).
- What is the typical THD+N of the PCM1808PWR?
The typical THD+N is -93 dB.
- What is the typical SNR of the PCM1808PWR?
The typical SNR is 99 dB.
- What is the dynamic range of the PCM1808PWR?
The dynamic range is typically 99 dB.
- Does the PCM1808PWR support both master and slave modes?
Yes, the PCM1808PWR supports both master and slave modes.
- What data formats are supported by the PCM1808PWR?
The device supports 24-Bit I2S and 24-Bit Left-Justified data formats.
- How does the PCM1808PWR handle power down and reset?
The PCM1808PWR handles power down and reset by halting the system clock.
