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 broad band wireless transmitters at sample rates up to 1.25 Gsps. Supplied from 3.3 V and 1.8 V power sources, it integrates a differential scalable output current up to 34 mA. 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 (312.5 MS/sec) at the input.
Features
- 1.25 Gsps maximum update rate
- 1.8 V and 3.3 V power supplies
- 3 or 4 wire mode SPI interface
- Differential scalable output current from 8.1 mA to 34 mA
- 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 100 ohm termination
- LVDS DDR input clock up to 312.5 MHz
- LVDS or LVPECL compatible DAC clock
- MDS CGVxpress&trade
- feature
- On-chip 1.25 V reference
- Power-down mode and sleep mode
- Selectable 2x, 4x and 8x interpolation filters
- Very low noise capacitor-free integrated Phase Locked Loop (PLL)