High Performance CMOS
Digital to Analog Converters
MB86060 and MB86061
MB86060
• 16-bit interpolating DAC
• 100 MSa/s input data with x4 interpolation enabled
• Programmable high-pass-filtered dither
• Selectable second order noise shaping
• Internal programmable low phase noise clock multiplier
• Guaranteed synchronization between multiple devices
• Low power, 3.3V operation (385 mW @ 32 MSa/s input, x4)
MB86061
• 12-bit 400 MSa/s DAC
• True ECL digital interface (–2V supply)
• 85 dBc SFDR @ 10 MHz, 200 MSa/s (shuffle on)
• Low power +3.3V and –2V operation
(308 mW @ 300 MSa/s)
• Plastic package 64-pin QFP
Features
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Description
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The MB86060 is a high performance, 12-bit, 400 MSa/s
Digital to Analog Converter (DAC) with a 16-bit
interpolation filtering front-end. Fujitsu’s proprietary
architecture (patent pending) delivers high speed with low
power consumption.
Design flexibility is provided by selectable input interpolation
filters, programmable dither, and noise-shaping facilities.
Excellent Spurious Free Dynamic Range (SFDR) performance,
along with high-speed conversion and low power, make this
device particularly suitable for high performance
communication systems. In particular, this includes direct IF
synthesis applications, such as multi-carrier, Edge, UMTS, and
W-CDMA/CDMA-2000.
The MB86061 is a high performance, 12-bit, 400 MSa/s DAC
based on the same proprietary converter core used in the
MB86060.
Excellent SFDR performance, paired with high-speed
conversion and low power, make the device particularly
suitable for high performance communication systems,
graphics, and test and instrumentation equipment
applications.
Both DACs are fabricated in Fujitsu’s advanced 0.35µm Triple
Well CMOS technology. Devices are characterized and
guaranteed over the full industrial temperature range of
–40 °C to +85 °C.
High Performance CMOS Digital to Analog Converters
© 2000 Fujitsu Microelectronics, Inc.
All company and product names are trademarks or
registered trademarks of their respective owners.
Printed in the U.S.A. TC-FS-20841-02/2000
FUJITSU MICROELECTRONICS, INC.
Corporate Headquarters
3545 North First Street, San Jose, California 95134-1804
Tel: (800) 866-8608 Fax: (408) 922-9179
E-mail: fmicrc@fmi.fujitsu.com Web Site: http://www.fujitsumicro.com
CLK
CLKB
ECL Data In
ECL Threshold
Format
Reset
Clock Buffer
Bandgap VRef
RRef
Shuffle
Control
DAC
Output
DAC
Bandgap
Reference
MB86061 Functional Block Diagram
Dither
NS Enable
Over
DAC
Output
Shuffle
Control
CLK Select
CLK In (Diff.)
Crystal
Lock
Mult Mode
Delay CLK
Out (Diff.)
Delay Line Ctrl
Data In
Data Format
Filter Control
Reset
Clock Divider
Clock
Multiplier
HP Filter
DAC
MB86060 Functional Block Diagram
Noise
Shaper
Dither
Generator
[x2 fast][x2 slow]
x2
x2
MB86060 Interpolating Filters
The integration of interpolating filters provides a
number of key benefits in system implementation. In
general, improved performance can be gained by using
a higher DAC conversion rate. Interpolation provides a
higher level of oversampling from the generated signal.
For the designer, the traditional problem with this
approach has been generating the required high-speed
digital data. Integrating this processing within the
DAC alleviates this problem. Other benefits include a
reduced effect because of the Sinx/x roll-off, which for
a conventional DAC represents –4 dB at Nyquist,
compared to only –0.22 dB with x4 interpolation. The
sharp cutoff and effective stopband attenuation of the
digital interpolation filter significantly improve
out-of-band SFDR.
Development Kit Support
Comprehensive development kits (DK86060 and
DK86061) are available for both the MB86060 and
MB86061 DACs. Each kit includes an evaluation board
that allows a user to quickly perform a comprehensive
evaluation of the device. The board provides a complete
evaluation environment for the DAC. A transformer
coupled differential output interface is provided to
simplify integration into target applications and
development environments. An RF clock source can
be connected via the transformer coupled input, and
digital input data is connected via a 40-way IDC
header.
The DK86060 and DK86061 development kits include
the following:
• Evaluation board with a pre-installed DAC device
• Spare DAC chip for customer development
• Power supply connector
• Comprehensive user manual
Bandgap
Reference
