Overview
The AD1974YSTZ-RL is a high-performance, single-chip analog-to-digital converter (ADC) produced by Analog Devices Inc. This component features four ADCs with differential inputs, utilizing Analog Devices' patented multibit sigma-delta (Σ-Δ) architecture. The AD1974 operates from a single 3.3 V supply for both digital and analog sections, minimizing power consumption and reducing electromagnetic interference (EMI). It includes an SPI port for microcontroller interface, enabling various control functions such as mute and power-down.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltages (AVDD, DVDD) | 3.0 | 3.3 | 3.6 | V |
| Master Clock | 12.288 MHz (48 kHz fS, 256 × fS mode) | |||
| Input Sample Rate | 48 kHz to 192 kHz | |||
| Measurement Bandwidth | 20 Hz to 20 kHz | |||
| Word Width | 24 bits | |||
| Load Capacitance (Digital Output) | 20 pF | |||
| Load Current (Digital Output) | ±1 mA or 1.5 kΩ to ½ DVDD supply | |||
| Input Voltage High (VIH) | 2.0 | V | ||
| Input Voltage Low (VIL) | 0.8 | V | ||
| High Level Output Voltage (VOH) | DVDD − 0.60 | V | ||
| Low Level Output Voltage (VOL) | 0.4 | V | ||
| Input Capacitance | 5 pF | |||
| Digital Current (Normal Operation) | 56 | 95 | mA (at fS = 48 kHz to 192 kHz) | |
| Power-Down Current | 2.0 | mA | ||
Key Features
- Four analog-to-digital converters (ADCs) with differential inputs using multibit sigma-delta (Σ-Δ) architecture
- Phase-locked loop (PLL) generated or direct master clock
- Low EMI design
- 107 dB dynamic range and SNR, −94 dB THD + N
- Single 3.3 V supply for digital and analog sections
- Tolerance for 5 V logic inputs
- Supports 24 bits and 8 kHz to 192 kHz sample rates
- Differential ADC input
- SPI-controllable for flexibility
- Software-controllable clickless mute and power-down
- Right justified, left justified, I2S, and TDM modes
- Master and slave modes up to 16-channel input/output
- Available in a 48-lead LQFP package
Applications
- Automotive audio systems
- Home Theater Systems
- Set-top boxes
- Digital audio effects processors
Q & A
- What is the AD1974YSTZ-RL?
The AD1974YSTZ-RL is a high-performance, single-chip analog-to-digital converter (ADC) with four differential input ADCs, designed by Analog Devices Inc.
- What is the supply voltage for the AD1974YSTZ-RL?
The AD1974YSTZ-RL operates from a single 3.3 V supply for both digital and analog sections.
- What are the key features of the AD1974YSTZ-RL?
Key features include a phase-locked loop (PLL), low EMI design, 107 dB dynamic range, single 3.3 V supply, tolerance for 5 V logic inputs, and SPI-controllable functionality.
- What are the typical applications of the AD1974YSTZ-RL?
Typical applications include automotive audio systems, home theater systems, set-top boxes, and digital audio effects processors.
- What is the maximum sample rate of the AD1974YSTZ-RL?
The maximum sample rate is 192 kHz.
- What is the word width of the AD1974YSTZ-RL?
The word width is 24 bits.
- How does the AD1974YSTZ-RL minimize EMI?
The AD1974YSTZ-RL minimizes EMI through its low EMI design and the use of an on-board phase-locked loop (PLL) to derive the master clock.
- What communication protocol does the AD1974YSTZ-RL support?
The AD1974YSTZ-RL supports SPI communication.
- Can the AD1974YSTZ-RL be used in daisy-chain mode?
Yes, the AD1974YSTZ-RL can be used in daisy-chain mode to expand the system to 8 or 16 ADCs.
- What is the package type of the AD1974YSTZ-RL?
The AD1974YSTZ-RL is available in a 48-lead LQFP package.
