MAX5898 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – 16-Bit, 500Msps, Interpolating and Modulating Dual DAC with Interleaved LVDS Inputs

19-3756; Rev 1; 7/07
EVAALVUAAILTAIOBNLEKIT
16-Bit, 500Msps, Interpolating and Modulating
Dual DAC with Interleaved LVDS Inputs
General Description
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 cir-
cuit. 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 recon-
struction 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 suppres-
sion errors generated by analog quadrature modulators.
The MAX5898 features a f_IM / 4 digital image-reject
modulator. This modulator generates a quadrature-mod-
ulated 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 pro-
grammable modes include the selection of 2x/4x/8x
interpolating filters, f_IM / 2, f_IM / 4 or no digital quadra-
ture 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.
Applications
Base Stations: 3G Multicarrier UMTS, CDMA, and GSM
Broadband Wireless Transmitters
Broadband Cable Infrastructure
Instrumentation and Automatic Test Equipment (ATE)
Analog Quadrature Modulation Architectures
SPI is a trademark of Motorola, Inc.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
Features
♦ 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)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
PKG
CODE
MAX5898EGK+D
-40°C to +85°C
68 QFN-EP*
(10mm x 10mm)
G6800-4
MAX5898EGK-D
-40°C to +85°C
68 QFN-EP*
(10mm x 10mm)
G6800-4
+Denotes a lead-free package.
D = Dry pack.
*EP = Exposed paddle.
Selector Guide
PART
MAX5893
MAX5894
MAX5895
MAX5898
RESOLUTION
(BITS)
12
14
16
16
DAC UPDATE
RATE (Msps)
500
500
500
500
INPUT
LOGIC
CMOS
CMOS
CMOS
LVDS
Simplified Diagram
DATA PORT
OUTI
DAC
DATACLK
DAC
OUTQ
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.