Overview
The PCM1808PWRG4, produced by Texas Instruments, is a high-performance, low-cost, single-chip stereo analog-to-digital converter (ADC) with single-ended analog voltage input. This device utilizes a delta-sigma modulator with 64-times oversampling and includes a digital decimation filter and a high-pass filter to remove the dc component of the input signal. It is designed for a wide variety of cost-sensitive consumer applications that require good performance and operation with dual power supplies: 5-V for analog and 3.3-V for digital. The PCM1808 is fabricated using a highly advanced CMOS process and is available in a compact 14-pin TSSOP package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Sampling Rate | 8 kHz – 96 kHz | |
| System Clock | 256 fS, 384 fS, 512 fS | |
| Analog Supply Voltage (VCC) | 5 V | V |
| Digital Supply Voltage (VDD) | 3.3 V | V |
| Package | 14-Pin TSSOP | |
| Operating Temperature Range | -40°C to 85°C | °C |
| 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 |
| On-Chip High-Pass Filter | 0.91 Hz (48 kHz) | Hz |
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 (Typical)
- Oversampling Decimation Filter with x64 oversampling frequency, ±0.05 dB pass-band ripple, and -65 dB stop-band attenuation
- On-Chip High-Pass Filter: 0.91 Hz (48 kHz)
- Flexible PCM Audio Interface: Master- or Slave-Mode Selectable, 24-Bit I2S and 24-Bit Left-Justified data formats
- Power Down and Reset by Halting System Clock
- Analog Antialias LPF Included
- Dual Power Supplies: 5-V for Analog and 3.3-V for Digital
- Compact 14-Pin TSSOP Package
Applications
The PCM1808 is suitable for a wide variety of cost-sensitive consumer applications, including:
- DVD Recorders
- Digital TVs
- AV Amplifiers/Receivers
- Other audio processing and recording devices where high-performance and low-cost are critical
Q & A
- What is the resolution of the PCM1808 ADC?
The PCM1808 has a resolution of 24 bits.
- What are the supported sampling rates for the PCM1808?
The PCM1808 supports sampling rates from 8 kHz to 96 kHz.
- What types of system clocks does the PCM1808 support?
The PCM1808 supports system clocks of 256 fS, 384 fS, and 512 fS.
- What are the power supply requirements for the PCM1808?
The PCM1808 requires a 5-V analog supply and a 3.3-V digital supply.
- What is the package type and pin count of the PCM1808?
The PCM1808 is available in a 14-pin TSSOP package.
- What are the typical THD+N, SNR, and Dynamic Range values for the PCM1808?
The typical values are THD+N of -93 dB, SNR of 99 dB, and Dynamic Range of 99 dB.
- Does the PCM1808 support master and slave modes?
Yes, the PCM1808 supports both master and slave modes.
- What data formats are supported by the PCM1808?
The PCM1808 supports 24-Bit I2S and 24-Bit Left-Justified data formats.
- How does the PCM1808 handle power down and reset?
The PCM1808 handles power down and reset by halting the system clock.
- What is the operating temperature range of the PCM1808?
The operating temperature range is -40°C to 85°C.
