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-channel 16-bit resolution

■ 1.25 Gsps maximum update rate

■ Selectable x2, x4 and x8 interpolation

filters

■ Low noise capacitor-free integrated

Phase-Locked Loop (PLL)

■ Embedded Numerically Controlled

Oscillator (NCO) with 40-bit

programmable frequency

■ Embedded complex (I/Q) modulator

■ Two power supplies

■ LVDS DDR compatible input interface

with on-chip 100 Ω terminations

■ LVDS DDR input clock up to 400 MHz

■ LVDS or LVPECL compatible DAC clock

■ Interleaved or folded I and Q data input

mode

■ Synchronization of multiple DAC

devices

■ 3-wire or 4-wire mode SPI interface

■ Differential scalable output current from

8.1 mA to 34 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: MC_GSM, LTE, WiMAX, GSM, CDMA, WCDMA, TD-SCDMA

■ Communications: LMDS/MMDS, point-to-point

■ Direct Digital Synthesis (DDS)

■ Digital radio links

■ Instrumentation

■ Automated Test Equipment (ATE)