Description

The CXA3778 is a high-speed 10-bit digital-to-analog converter integrated circuit designed for use in a variety of electronic systems. It offers multiplexed input of two 10-bit digital signals and provides a maximum conversion rate of 125 MSPS (Mega Samples Per Second). The IC features a clock frequency divider circuit that allows for either 1/2 frequency-divided clock output or internal halving of the clock frequency to enable multiplexed operation. The data input is at TTL level, while the clock and reset input are selectable as either TTL or PECL to enable the IC's use in a variety of applications.

Specifications and features

• Maximum conversion rate: 125 MSPS (PECL), 100 MSPS (TTL)
• Resolution: 10 bits
• Power consumption: 480mW (typ.)
• Data input level: TTL
• Clock and reset input level: TTL and PECL compatible
• 2:1 multiplexed input function
• Built-in clock frequency divider circuit with 1/2 frequency-divided clock output
• Voltage output (50Ω load drive possible)
• Single power supply or ± dual power supply operation
• Reset signal polarity switching function

Application Scenarios

The CXA3778 is suitable for use in a range of electronic systems including:

• LCD
• DDS
• HDTV
• Communications (QPSK, QAM)
• Measuring devices

Comparison

• High-speed operation with a maximum conversion rate of 125 MSPS
• Multiplexed input function
• Low power consumption
• Selectable clock and reset input levels to enable use in various electronic systems
• Built-in clock frequency divider circuit with 1/2 frequency-divided output

• 10-bit resolution may be insufficient for certain applications