AD9837BCPZ-RL7

The AD9837 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. Output frequency and phase are software-programmable, allowing easy adjustment. The frequency registers are 28-bit: at a clock rate of 16 MHz, a resolution of 0.06 Hz can be achieved; at a clock rate of 5 MHz, a resolution of 0.02 Hz can be achieved. The AD9837 is written via 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 from a 2.3 V to 5.5 V supply. The AD9837 features a power-down (sleep) function. Unused sections of the device can be powered down to minimize power consumption. For example, the DAC can be powered down when generating a clock output. The AD9837 is available in a 10-lead LFCSP_WD package.

Applications

• Frequency excitation/waveform generation
• Liquid and gas flow measurement
• Sensor applications: proximity, motion, and defect detection
• Line loss/attenuation
• Test and medical equipment
• Sweep/clock generation
• Time-domain reflectometry (TDR) applications

Key features

• Digitally programmable frequency and phase
• Power consumption: 8.5 mW (2.3 V)
• MCLK speed: 16 MHz (Grade B), 5 MHz (Grade A)
• 28-bit resolution: 0.06 Hz (16 MHz reference clock)
• Sine/triangle/square wave output
• 2.3 V to 5.5 V supply voltage
• 3-wire SPI interface
• Extended temperature range: -40°C to +125°C
• Power-down option
• 10-lead LFCSP