Overview
The ADAU1977WBCPZ-RL, produced by Analog Devices Inc., is a high-performance quad analog-to-digital converter (ADC) integrated circuit. This component is designed for applications requiring precise and reliable analog-to-digital conversion, particularly in environments where low electromagnetic interference (EMI) is crucial. The ADAU1977 incorporates four direct-coupled differential inputs capable of handling up to 10 V rms, making it suitable for a variety of audio and signal processing applications. The ADCs use a multibit sigma-delta (Σ-Δ) architecture with a continuous time front end, which contributes to the low EMI design. The device also includes comprehensive diagnostic capabilities and supports both I²C and SPI control interfaces.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of ADCs | 4 |
| Input Type | Direct-coupled differential inputs |
| Input Voltage Range | Up to 10 V rms |
| ADC Dynamic Range | 106 dB |
| Sample Rates | 8 kHz to 192 kHz |
| Resolution | 24-bit |
| THD + N | −95 dB |
| Power Supply | Single 3.3 V |
| Operating Temperature | −40°C to +105°C |
| Package Type | 40-Lead LFCSP (6mm x 6mm w/ EP) |
| Control Interface | I²C/SPI |
Key Features
- Programmable microphone bias (5 V to 9 V) with diagnostics
- Comprehensive diagnostic circuitry for input line faults and microphone inputs
- On-chip PLL for master clock derivation from external clock or frame clock
- Selectable digital high-pass filter
- Low EMI design using multibit sigma-delta (Σ-Δ) architecture with continuous time front end
- Support for I²C and SPI control interfaces
- Software-controllable clickless mute and digital volume control with autoramp function
- Right justified, left justified, I²S justified, and TDM modes
- Master and slave operation modes
Applications
- Automotive audio systems
- Active Noise Cancellation (ANC) systems
Q & A
- What is the maximum input voltage range for the ADAU1977WBCPZ-RL?
The maximum input voltage range is up to 10 V rms.
- What is the dynamic range of the ADCs in the ADAU1977WBCPZ-RL?
The dynamic range of the ADCs is 106 dB.
- What are the supported sample rates for the ADAU1977WBCPZ-RL?
The supported sample rates range from 8 kHz to 192 kHz.
- What type of control interfaces does the ADAU1977WBCPZ-RL support?
The device supports both I²C and SPI control interfaces.
- What is the operating temperature range for the ADAU1977WBCPZ-RL?
The operating temperature range is from −40°C to +105°C.
- What is the package type of the ADAU1977WBCPZ-RL?
The package type is a 40-Lead LFCSP (6mm x 6mm w/ EP).
- Does the ADAU1977WBCPZ-RL have built-in diagnostic capabilities?
- Can the microphone bias voltage be programmed in the ADAU1977WBCPZ-RL?
- What is the purpose of the on-chip PLL in the ADAU1977WBCPZ-RL?
The on-chip PLL can derive the master clock from an external clock input or frame clock, eliminating the need for a separate high frequency master clock.
- What are some common applications of the ADAU1977WBCPZ-RL?
