特性
- 1.8 V/3.3 V CMOS input buffers
- 1.8 V and 3.3 V power supplies
- 32-bit programmable NCO frequency
- 750 Msps maximum update rate
- Differential scalable output current from 1.6 mA to 22 mA
- Dual 14-bit resolution
- Dual port or Interleaved data modes
- External analog offset control (10-bit auxiliary DACs)
- Fully compatible SPI port
- Industrial temperature range from -40°C to +85°C
- Input data rate up to 185 Msps
- Internal digital offset control
- Inverse x / (sin x) function
- LVDS compatible clock
- On-chip 1.29 V reference
- Power-down and Sleep modes
- Selectable 2x,4x or or 8x interpolation filters
- 2's complement or binary offset data format
- Typical 1.2 W power dissipation at 4x interpolation with PLL off and 740 Msps
- Very low noise cap-free integrated PLL
DAC1405D750HW - Block Diagram
描述
The DAC1405D750HW is a high-speed 14-bit dual channel Digital-to-Analog Converter (DAC) with selectable 4x or 8x interpolating filters optimized for multi-carrier wireless transmitters. Thanks to its digital on-chip modulation, the DAC1405D750 allows the complex I and Q inputs to be converted from BaseBand (BB) to IF. The mixing frequency is adjusted via a Serial Peripheral Interface (SPI) with a 32-bit Numerically Controlled Oscillator (NCO) and the phase is controlled by a 16-bit register. Two modes of operation are available: separate data ports or a single interleaved high-speed data port. In the Interleaved mode, the input data stream is demultiplexed into its original I and Q data and then latched.
