General description
The DAC1627D1G25 is a high-speed 16-bit dual channel Digital-to-Analog Converter (DAC) with selectable ×2, ×4 and ×8 interpolating filters optimized for multi-carrier and broadband wireless transmitters at sample rates of up to 1.25 Gsps. Supplied from a 3.3 V and a 1.8 V source, the DAC1627D1G25 integrates a differential scalable output current up to 31.8 mA.
Features and benefits
■ Dual 16-bit resolution
■ 1.25 Gsps maximum update rate
■ Selectable ×2, ×4 and ×8 interpolation
filters
■ Very low noise capacitor-free integrated
Phase-Locked Loop (PLL)
■ Embedded Numerically Controlled
Oscillator (NCO) with 40-bit
programmable frequency
■ Embedded complex modulator
■ 1.8 V and 3.3 V power supplies
■ LVDS DDR compatible input interface
with on-chip 100 Ω terminations
■ LVDS DDR input clock up to 312.5 MHz
■ LVDS or LVPECL compatible DAC clock
■ Interleaved or folded I and Q data input
mode
■ Synchronization of multiple DAC
devices
■ 3 or 4 wires mode SPI interface
■ Differential scalable output current from
6.95 mA to 31.8 mA
■ External analog offset control
(10-bit auxiliary DACs)
■ High resolution internal digital gain and
offset control to support high
performance IQ-modulator image
rejection
■ Internal phase correction
■ Inverse (sin x) / x function
■ Power-down mode and Sleep mode;
5-bit NCO low power mode
■ On-chip 1.25 V reference
■ Industrial temperature range −40 °C to
+85 °C
■ 72 pins small form factor HVQFN
package
Applications
■ Wireless infrastructure: MG_GSM, LTE, WiMAX, GSM, CDMA, WCDMA, TD-SCDMA
■ Communication: LMDS/MMDS, point-to-point
■ Direct Digital Synthesis (DDS)
■ Broadband wireless systems
■ Digital radio links
■ Instrumentation
■ Automated Test Equipment (ATE)
|