Overview

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.

DAC1627D1G25HN - Block Diagram
DAC1627D1G25HN - Block Diagram
  • 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)

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)

Documentation

= Featured Documentation
Type Title Date
Datasheet
DAC1627D1G25 Datasheet
PDF 1014 KB
1 item

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    DAC1627D1G25HN-C1
    circleObsolete
    memory
    view_in_ar
    		VFQFPN 72 I Yes Tray
    DAC1627D1G25HN-C18
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    memory
    view_in_ar
    		VFQFPN 72 I Yes Reel
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