The AD9838 is a low power DDS device capable of producing high performance sine and triangular outputs. It also has an on-board comparator that allows a square wave to be produced for clock generation. Consuming only 11 mW of power
The AD9838 is a low‑power direct‑digital‑synthesis (DDS) device that generates high‑performance sine and triangular waveforms. It operates from a 2.3 V to 5.5 V supply, consumes only 11 mW at 2.3 V, and includes an on‑board comparator for square‑wave generation.
The datasheet provides detailed specifications, timing characteristics, absolute maximum ratings, pin configurations, and application notes such as frequency‑phase modulation, low‑power RF/communications, and sensor interfaces. It also includes the functional block diagram, package information (20‑lead LFCSP), and recommended layout and grounding practices.
| Supply Voltage | 2.3 V to 5.5 V |
|---|---|
| Power Consumption | 11 mW at 2.3 V |
| Output Frequency Range | up to 8 MHz |
| Resolution | 10 bits |
| Update Rate (A‑grade) | 5 MSPS |
| Update Rate (B‑grade) | 16 MSPS |
| Full‑Scale Output Current | 3.0 mA (typ) |
| Internal Voltage Reference | 1.11 V – 1.24 V |
| Operating Temperature Range | –40 °C to +125 °C |
| Package | 20‑lead LFCSP_WQ |
The device consumes 11 mW of power when operated at 2.3 V.
By asserting the SLEEP pin (active high), the DAC is powered down for low‑power operation.
It can generate output frequencies up to 8 MHz.
The typical full‑scale output current is 3.0 mA.