AD1939 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec
Automotive audio systems
Home Theater Systems
Set-top boxes
Digital audio effects processors
The AD1939 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with differential input, and eight digital-to-analog converters (DACs) with differential output using the Analog Devices, Inc. patented multibit sigma-delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to adjust volume and many other parameters. The AD1939 operates from 3.3 V digital and analog supplies. The AD1939 is available in a 64-lead (differential output) LQFP package.
The AD1939 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the master clock from the LR clock or from an external crystal, the AD1939 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The DACs and ADCs are designed using the latest Analog Devices continuous time architectures to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions.
Applications
Features and Benefits- PLL generated or direct master clock
- Low EMI design
- 112 dB DAC/107 dB ADC dynamic range and SNR
- −94 dB THD + N
- Single 3.3 V supply
- Tolerance for 5 V logic inputs
- Supports 24-bits and 8 kHz to 192 kHz sample rates
- Differential ADC input
- Differential DAC output
- Log volume control with autoramp function
- SPI controllable for flexibility
- For additional features please see the data sheet
| IBIS ModelsSoftware & Systems Requirements |
Data Sheets
Application Notes
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD1939WBSTZ Production | 64 ld LQFP (10x10mm) | OTH 160 | -40 to 105C | 5.56 | 4.45 | Y |
| AD1939WBSTZ-RL Production | 64 ld LQFP (10x10mm) | REEL 1500 | -40 to 105C | 0 | 4.45 | Y |
| AD1939YSTZ Production | 64 ld LQFP (10x10mm) | OTH 160 | -40 to 105C | 0 | 0 | Y |
| AD1939YSTZRL Production | 64 ld LQFP (10x10mm) | REEL 1500 | -40 to 105C | 0 | 0 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD1939AZ | Evaluation Board | 499 | Y |
| EVAL-ADUSB2EBZ | USB Interface | 80 | Y |
Reference Materials
