概览
描述
The DAC1627D1G25 is a 16-bit dual-channel digital-to-analog converter (DAC) with selectable 2x, 4x, and 8x interpolation filters optimized for multi-carrier broadband wireless transmitters at sample rates up to 1.25Gsps. Supplied from 3.3V and 1.8V power sources, it integrates a differential scalable output current up to 34mA. The mixer frequency is set by a high-resolution 40-bit numerically controlled oscillator (NCO). High-resolution internal gain, phase, and offset control provide outstanding image and LO rejection at the system analog modulator output. An inverse (sin x)/x function ensures controlled flatness at the DAC output. The LVDS DDR receiver interface allows a high data bandwidth (312.5MS/sec) at the input.
特性
- 1.25Gsps maximum update rate
- 1.8V and 3.3V power supplies
- 3-wire or 4-wire mode SPI interface
- Differential scalable output current from 8.1mA to 34mA
- Dual-channel 16-bit resolution
- Embedded complex digital modulator
- Embedded numerically controlled oscillator with 40-bit programmable frequency
- External analog offset control (10-bit auxiliary DACs)
- High-resolution internal digital gain and offset control
- Interleaved or folded I and Q data input modes
- Internal phase correction
- Inverse (sin x)/x function
- LVDS DDR compatible input interface with on-chip 100Ω termination
- LVDS DDR input clock up to 312.5MHz
- LVDS or LVPECL-compatible DAC clock
- On-chip 1.25V reference
- Power-down mode and sleep mode
- Selectable 2x, 4x, and 8x interpolation filters
- Very-low noise capacitor-free integrated Phase-Locked Loop (PLL)
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