MAX5898 16-Bit, 500Msps, Interpolating and Modulating Dual DAC with Interleaved LVDS Inputs

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The MAX5898 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 integrated circuit. At 30MHz output frequency and 500Msps update rate, the in-band SFDR is 81dBc, while only consuming 1.2W. 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. Each channel includes offset and gain programmability, allowing the user to calibrate out local oscillator (LO) feedthrough and sideband suppression errors generated by analog quadrature modulators.

The MAX5898 features a f_IM / 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 f_IM / 2 or f_IM / 4.

The MAX5898 features a standard LVDS interface for low electromagnetic interference (EMI). Interleaved data is applied through a single 16-bit bus. A 3.3V SPI™ port is provided for mode configuration. The programmable modes include the selection of 2x/4x/8x interpolating filters, f_IM / 2, f_IM / 4 or no digital quadrature modulation with image rejection, individual channel gain and offset adjustment, and offset binary or two's-complement data interface.

Compatible versions with CMOS interfaces and 12-, 14-, and 16-bit resolutions are also available. Refer to the MAX5893 data sheet for 12-bit CMOS, MAX5894 for 14-bit CMOS, and the MAX5895 for 16-bit CMOS versions.

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

Key Features

Applications/Uses

71dB ACLR at f_OUT = 61.44MHz (Four-Carrier WCDMA)
Meets Multicarrier UMTS, cdma2000®, GSM Spectral Masks (f_OUT = 122MHz)
Noise Spectral Density = -160dBFS/Hz at f_OUT = 16MHz
90dBc SFDR at Low-IF Frequency (10MHz)
88dBc SFDR at High-IF Frequency (50MHz)
Low Power: 831mW (f_CLK = 250MHz)
User Programmable
- Selectable 2x, 4x, or 8x Interpolating Filters
  - < 0.01dB Passband Ripple
  - > 95dB Stopband Rejection
- Selectable Real or Complex Modulator Operation
- Selectable Modulator LO Frequency: OFF, f_IM / 2, or f_IM / 4
- Selectable Output Filter: Lowpass or Highpass
- Per Channel Gain and Offset Adjustment
EV Kit Available (Order the MAX5898EVKIT)

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

Key Specifications: High-Speed DACs

Part Number

Features

Resolution (Bits)

f_CLK (Msps)

Number of Channels

SFDR @ f_OUT (dBc)

INL (±LSB)

DNL (±LSB)

Output Current (mA)

P_DISS (mW)

Interface

Supply Voltage (V)

EV-Kit

Package

RoHS Available

Price^*

MAX5898

•	Interpolation Filter

•	Modulation

500

89 @ 10MHz

340

Interleaved, LVDS

3.3 & 1.8

Yes

QFN/68

Yes

$22.45 @ 1k

See All High-Speed DACs (44)

Notes:
^*This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.