Overview
The PCM1796DBR, produced by Texas Instruments, is a monolithic CMOS integrated circuit designed for high-performance audio applications. It features stereo digital-to-analog converters and supporting circuitry, all packaged in a compact 28-lead SSOP. The device utilizes TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. It supports both PCM and DSD audio data formats, making it versatile for various audio systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 | Bits |
| Dynamic Range | 123 dB | |
| THD+N | 0.0005% | |
| Differential Current Output | 4 mA p-p | |
| Oversampling Digital Filter | 8× | |
| Stop-Band Attenuation | –98 dB | |
| Pass-Band Ripple | ±0.0002 dB | |
| Sampling Frequency | 10 kHz to 200 kHz | |
| System Clock Frequency | 128, 192, 256, 384, 512, 768 fS | |
| Audio Data Formats | Standard, I2S, Left-Justified, DSD | |
| Supply Voltage (Analog) | 4.75 V to 5.25 V | VDC |
| Supply Voltage (Digital) | 3 V to 3.6 V | VDC |
| Operating Temperature | –25°C to 85°C |
Key Features
- 24-bit resolution with high dynamic range and low THD+N.
- Differential current output allowing for optimized external analog performance.
- Support for 16-, 20-, and 24-bit audio data formats.
- Compatibility with PCM and DSD audio data formats.
- User-programmable mode controls including digital attenuation, de-emphasis, and filter rolloff.
- Interface options for external digital filters or DSPs.
- Dual supply operation with 5-V analog and 3.3-V digital supplies.
- 5-V tolerant digital inputs.
- Compact 28-lead SSOP package.
Applications
- A/V Receivers
- SACD Players
- DVD Players
- HDTV Receivers
- Car Audio Systems
- Digital Multitrack Recorders
- Other applications requiring 24-bit audio quality.
Q & A
- What is the resolution of the PCM1796DBR?
The PCM1796DBR has a 24-bit resolution.
- What are the supported audio data formats?
The device supports Standard, I2S, Left-Justified, and DSD audio data formats.
- What is the dynamic range of the PCM1796DBR?
The dynamic range is 123 dB.
- What are the system clock frequency options?
The system clock frequencies supported are 128, 192, 256, 384, 512, and 768 fS.
- Does the PCM1796DBR support external digital filters or DSPs?
- What is the operating temperature range of the PCM1796DBR?
The operating temperature range is –25°C to 85°C.
- What are the supply voltage requirements for the PCM1796DBR?
The device requires 4.75 V to 5.25 V for analog supply and 3 V to 3.6 V for digital supply.
- Is the PCM1796DBR compatible with other Texas Instruments products?
- How does the power-on reset function work?
The power-on reset function is enabled when VDD > 2 V, and it requires 1024 system clocks for initialization.
- Can the PCM1796DBR be reset externally?
