The ISL5314 is a complete Direct Digital Synthesizer (DDS) system, integrating a 48-bit programmable Carrier NCO and a high-speed 14-bit DAC. It supports parallel processor interface and asynchronous serial interface, with modulation control and frequency control capabilities.
The ISL5314 is a 14‑bit Direct Digital Synthesizer (DDS) that integrates a programmable 48‑bit carrier NCO and a high‑speed DAC in a 48‑pin LQFP package. It supports both parallel and serial interfaces for fast frequency tuning, and includes control pins for phase and offset frequency modulation.
The datasheet details electrical specifications, pin descriptions, functional blocks, and application notes such as FSK/PSK modulation, comparator usage for square‑wave generation, and layout recommendations for optimal performance.
| DAC resolution | 14‑bit |
|---|---|
| Maximum output sample rate (5 V supply) | 125 MSPS |
| Maximum output sample rate (3.3 V supply) | 100 MSPS |
| Programmable frequency control width | 48‑bit |
| Package | 48‑pin LQFP |
| Internal DAC voltage reference | 1.2 V nominal |
The device can output up to 125 MSPS when powered with a 5 V digital supply.
The carrier NCO is 48‑bit programmable.
The PHO and PH1 pins select phase offsets of 0°, 90°, 180°, and 270°.
The internal DAC reference voltage is nominally +1.2 V.