Overview
The AD1837AAS is a high-performance single-chip codec produced by Analog Devices Inc. This device features four stereo Digital-to-Analog Converters (DACs) and one stereo Analog-to-Digital Converter (ADC). Each DAC includes a high-performance digital interpolation filter, a multibit sigma-delta modulator, and a continuous-time voltage output analog section. The ADC section comprises two 24-bit conversion channels with multibit sigma-delta modulators and decimation filters. The codec supports various serial interface modes, including left-justified, right-justified, I2S, and DSP compatible modes, and is controlled via an SPI-compatible serial port.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltages (AVDD, DVDD) | 4.5 V to 5.5 V |
| Supply Voltage (OVDD) | 3.0 V to DVDD |
| Analog Supply Current (IANALOG) | 84 mA to 95 mA |
| Digital Supply Current (IDIGITAL) | 64 mA to 74 mA |
| Power Dissipation (Operation, Both Supplies) | 740 mW |
| Operating Temperature Range | -40°C to +85°C |
| ADC Sample Rate | Up to 96 kHz |
| DAC Sample Rate | Up to 192 kHz (DAC 1 only) |
| Resolution | 24-bit |
| Dynamic Range (ADC/DAC) | 105 dB (ADC), 108 dB (DAC) |
| Signal-to-Noise Ratio (ADC/DAC) | 105 dB (ADC), 108 dB (DAC) |
| Package Type | 52-lead MQFP (10x10) |
Key Features
- Four independent stereo DACs with eight single-ended analog outputs, each with independent volume control and clickless mute functions.
- One stereo ADC with two 24-bit conversion channels, featuring on-board digital decimation filters with 120 dB stop-band attenuation and linear phase response.
- Flexible serial interface supporting left-justified, right-justified, I2S, and DSP compatible modes.
- SPI-compatible control port for programming internal control registers.
- Separate supply pins for analog and digital sections, allowing operation from a single 5 V supply or 3.3 V digital interface.
- Internal voltage reference with a nominal value of 2.25 V).
Applications
- DVD video and audio players
- Home theater systems
- Automotive audio systems
- Audio/visual receivers
- Digital audio effects processors
- Professional audio equipment
- Consumer electronics
- Industrial automation
- Medical devices).
Q & A
- What is the resolution of the AD1837AAS?
The AD1837AAS has a 24-bit resolution for both ADC and DAC channels).
- What are the supported serial interface modes?
The AD1837AAS supports left-justified, right-justified, I2S, and DSP compatible serial modes).
- What is the maximum sample rate for the ADC and DAC?
The ADC can operate up to 96 kHz, and the DAC can operate up to 192 kHz (DAC 1 only)).
- What is the dynamic range and signal-to-noise ratio of the ADC and DAC?
The dynamic range and signal-to-noise ratio are 105 dB for the ADC and 108 dB for the DAC).
- What is the operating temperature range of the AD1837AAS?
The operating temperature range is -40°C to +85°C).
- What type of package does the AD1837AAS come in?
The AD1837AAS is available in a 52-lead MQFP (10x10) package).
- Can the AD1837AAS be powered from a single supply?
Yes, the AD1837AAS can be operated from a single 5 V supply, but it also supports a separate 3.3 V supply for the digital interface).
- How is the control of the AD1837AAS achieved?
Control of the AD1837AAS is achieved through an SPI-compatible serial port).
- What are the key applications of the AD1837AAS?
The AD1837AAS is used in DVD video and audio players, home theater systems, automotive audio systems, audio/visual receivers, digital audio effects processors, professional audio equipment, consumer electronics, industrial automation, and medical devices).
- Does the AD1837AAS have an internal voltage reference?
Yes, the AD1837AAS has an internal voltage reference with a nominal value of 2.25 V).
