MAX5893_08 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – 12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs

19-3546; Rev 2; 10/08
EVAALVUAAILTAIOBNLEKIT
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
General Description
The MAX5893 programmable interpolating, modulating,
500Msps, dual digital-to-analog converter (DAC) offers
superior dynamic performance and is optimized for high-
performance wideband, single-carrier transmit applica-
tions. The device integrates a selectable 2x/4x/8x
interpolating filter, a digital quadrature modulator, and
dual 12-bit high-speed DACs on a single integrated cir-
cuit. At 30MHz output frequency and 500Msps update
rate, the in-band SFDR is 84dBc while consuming 1.1W.
The device also delivers 72dB ACLR for single-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 MAX5893 features a f_IM/4 digital image-reject mod-
ulator. This modulator generates a quadrature-modulat-
ed 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 MAX5893 features a standard 1.8V CMOS, 3.3V tol-
erant 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 fil-
ters, f_IM/2, f_IM/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 14- and 16-bit devices are also available.
Refer to the MAX5894 data sheet for the 14-bit version
and the MAX5895 data sheet for the 16-bit version.
Applications
Base Stations: 3G UMTS, CDMA, and GSM
Broadband Wireless Transmitters
Broadband Cable Infrastructure
Instrumentation and Automatic Test Equipment (ATE)
Analog Quadrature Modulation Architectures
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
Features
o 72dB ACLR at f_OUT = 61.44MHz (Single-Carrier
WCDMA)
o Meets 3G UMTS, cdma2000^®, GSM Spectral Masks
(f_OUT = 122MHz)
o Noise Spectral Density = -151dBFS/Hz at
f_OUT = 16MHz
o 90dBc SFDR at Low-IF Frequency (10MHz)
o 86dBc SFDR at High-IF Frequency (50MHz)
o Low Power: 511mW (f_CLK = 100MHz)
o 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, f_IM/2,
or f_IM/4
Selectable Output Filter: Lowpass or Highpass
Channel Gain and Offset Adjustment
o EV Kit Available (Order the MAX5893EVKIT)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5893EGK-D
-40°C to +85°C
68 QFN-EP*
MAX5893EGK+D
-40°C to +85°C
68 QFN-EP*
D = Dry pack.
*EP = Exposed pad.
+Denotes a lead-free/RoHS-compliant package.
Selector Guide
PART
MAX5893
MAX5894
MAX5895
MAX5898
RESOLUTION DAC UPDATE
(BITS)
RATE (Msps)
INPUT
LOGIC
12
500
CMOS
14
500
CMOS
16
500
CMOS
16
500
LVDS
Simplified Diagram
DATA
PORT A
DATACLK
DATA
PORT B
OUTI
DAC
DAC
OUTQ
________________________________________________________________ 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.