AD9834

Data Sheet 20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS AD9834 FEATURES Narrow-band SFDR >72 dB 2.3 V to 5.5 V power supply Output frequency up to 37.5 MHz Sine output/triangular output On-board comparator 3-wire SPI® interface Capability for phase modulation and frequency modulation is provided. The frequency registers are 28 bits; with a 75 MHz clock rate, resolution of 0.28 Hz can be achieved. Similarly, with a 1 MHz clock rate, the AD9834 can be tuned to 0.004 Hz resolution. Frequency and phase modulation are affected by loading registers through the serial interface and toggling the registers using software or the FSELECT pin and PSELECT pin, respectively. Extended temperature range: −40°C to +105°C Power-down option 20 mW power consumption at 3 V 20-lead TSSOP APPLICATIONS The AD9834 is written to using a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. The device operates with a power supply from 2.3 V to 5.5 V. The analog and digital sections are independent and can be run Frequency stimulus/waveform generation from different power supplies, for example, AVDD can equal Frequency phase tuning and modulation 5 V with DVDD equal to 3 V. Low power RF/communications systems Liquid and gas flow measurement Sensory applications: proximity, motion, and defect detection Test and medical equipment GENERAL DESCRIPTION The AD9834 is a 75 MHz low power DDS device capable of ...