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16-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs

Product Details

Key Features

Parametric specs for High-Speed DACs (≥ 1MHz)
Resolution (bits) 16
# Channels 2
fCLK (Msps) 500
SFDR (dBc) (@ fOUT) 90 @ 10MHz
DNL (±LSB) 1
INL (±LSB) 3
PDISS (mW) 511
Interface Parallel
VSUPPLY (V) 3.3
Package/Pins QFN/68
Budgetary
Price (See Notes)
23.16
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Simplified Block Diagram

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Parameters

Parametric specs for High-Speed DACs (≥ 1MHz)
Resolution (bits) 16
# Channels 2
fCLK (Msps) 500
SFDR (dBc) (@ fOUT) 90 @ 10MHz
DNL (±LSB) 1
INL (±LSB) 3
PDISS (mW) 511
Interface Parallel
VSUPPLY (V) 3.3
Package/Pins QFN/68
Budgetary
Price (See Notes)
23.16

Key Features

  • 71dB ACLR at fOUT = 61.44MHz (Four-Carrier WCDMA)
  • Meets Multicarrier UMTS, cdma2000®, GSM Spectral Masks (fOUT = 122MHz)
  • Noise Spectral Density = -158dBFS/Hz at fOUT = 16MHz
  • 92dBc SFDR at Low-IF Frequency (10MHz)
  • 90dBc SFDR at High-IF Frequency (50MHz)
  • Low Power: 511mW (fCLK = 100MHz)
  • User Programmable
    • Selectable 2x, 4x, or 8x Interpolating Filters
      • < 0.01dB Passband Ripple
      • > 99dB Stopband Rejection
    • Selectable Real or Complex Modulator Operation
    • Selectable Modulator LO Frequency: OFF, fIM/2, or fIM/4
    • Selectable Output Filter: Lowpass or Highpass
    • Channel Gain and Offset Adjustment
  • EV Kit Available (Order the MAX5895EVKIT)

Applications/Uses

  • Analog Quadrature Modulation Architectures
  • Base Stations: 3G Multicarrier UMTS, CDMA, and GSM
  • Broadband Cable Infrastructure
  • Broadband Wireless Transmitters
  • Instrumentation and Automatic Test Equipment (ATE)

Description

The MAX5895 programmable interpolating, modulating, 500Msps, dual digital-to-analog converter (DAC) offers superior dynamic performance and is optimized for high-performance, wideband single- and multicarrier transmit applications. The device integrates a selectable 2x/4x/8x interpolating filter, a digital quadrature modulator, and dual 16-bit high-speed DACs on a single IC. At 30MHz output frequency and 500Msps update rate, the in-band SFDR is 88dBc while consuming 1.1W. The device also delivers 71dB ACLR for four-carrier WCDMA at a 61.44MHz output frequency.

The selectable interpolating filters allow lower input data rates while taking advantage of the high DAC update rates. These linear-phase interpolation filters ease reconstruction filter requirements and enhance the passband dynamic performance. Individual offset and gain programmability allow the user to calibrate out local oscillator (LO) feedthrough and sideband suppression errors generated by analog quadrature modulators.

The MAX5895 features a fIM/4 digital image-reject modulator. This modulator generates a quadrature-modulated IF signal that can be presented to an analog I/Q modulator to complete the upconversion process. A second digital modulation mode allows the signal to be frequency-translated with image pairs at fIM/2 or fIM/4.

The MAX5895 features a standard 1.8V CMOS, 3.3V tolerant data input bus for easy interface. A 3.3V SPI™ port is provided for mode configuration. The programmable modes include the selection of 2x/4x/8x interpolating filters, fIM/2, fIM/4 or no digital quadrature modulation with image rejection, channel gain and offset adjustment, and offset binary or two's complement data interface.

Pin-compatible 12- and 14-bit devices are also available. Refer to the MAX5894 data sheet for the 14-bit version and the MAX5893 data sheet for the 12-bit version.

See a parametric table of the complete family of pin-compatible 12-/14-/16-bit high-speed DACs.

Simplified Block Diagram

MAX5895: Simplified Diagram MAX5895: Simplified Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .