max5893egk-d Maxim Integrated Products, Inc., max5893egk-d Datasheet

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max5893egk-d

Manufacturer Part Number
max5893egk-d
Description
Max5893 12-bit, 500msps Interpolating And Modulating Dual Dac With Cmos Inputs
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
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
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
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
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.
Base Stations: 3G UMTS, CDMA, and GSM
Broadband Wireless Transmitters
Broadband Cable Infrastructure
Instrumentation and Automatic Test Equipment (ATE)
Analog Quadrature Modulation Architectures
19-3546; Rev 1; 4/07
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
12-Bit, 500Msps Interpolating and Modulating
IM
/ 2, f
IM
/ 4 or no digital quadrature modulation
________________________________________________________________ Maxim Integrated Products
General Description
IM
/ 4 digital image-reject
Applications
IM
/ 2 or f
Dual DAC with CMOS Inputs
IM
/ 4.
♦ 72dB ACLR at f
♦ Meets 3G UMTS, cdma2000
♦ Noise Spectral Density = -151dBFS/Hz at
♦ 90dBc SFDR at Low-IF Frequency (10MHz)
♦ 86dBc SFDR at High-IF Frequency (50MHz)
♦ Low Power: 511mW (f
♦ User Programmable
♦ EV Kit Available (Order the MAX5893EVKIT)
D = Dry pack.
*EP = Exposed paddle.
+Denotes lead-free package.
MAX5893EGK-D
MAX5893EGK+D
MAX5893
MAX5894
MAX5895
MAX5898
WCDMA)
(f
f
Selectable 2x, 4x, or 8x Interpolating Filters
Selectable Real or Complex Modulator Operation
Selectable Modulator LO Frequency: OFF, f
or f
Selectable Output Filter: Lowpass or Highpass
Channel Gain and Offset Adjustment
DATACLK
OUT
OUT
PART
PORT A
PORT B
<0.01dB Passband Ripple
>99dB Stopband Rejection
DATA
DATA
IM
PART
= 16MHz
= 122MHz)
/ 4
RESOLUTION
(BITS)
-40°C to +85°C
-40°C to +85°C
OUT
TEMP RANGE
12
14
16
16
Ordering Information
= 61.44MHz (Single-Carrier
CLK
Simplified Diagram
DAC UPDATE
RATE (Msps)
= 100MHz)
®
Selector Guide
, GSM Spectral Masks
500
500
500
500
68 QFN-EP*
68 QFN-EP*
PACKAGE
PIN-
Features
DAC
DAC
LOGIC
INPUT
CMOS
CMOS
CMOS
G6800-4
G6800-4
LVDS
IM
CODE
OUTI
OUTQ
PKG
/ 2,
1

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max5893egk-d Summary of contents

Page 1

... Selectable Modulator LO Frequency: OFF Selectable Output Filter: Lowpass or Highpass Channel Gain and Offset Adjustment ♦ EV Kit Available (Order the MAX5893EVKIT) PART / MAX5893EGK-D MAX5893EGK Dry pack. *EP = Exposed paddle. +Denotes lead-free package. PART MAX5893 Applications MAX5894 MAX5895 MAX5898 DATA ...

Page 2

Interpolating and Modulating Dual DAC with CMOS Inputs ABSOLUTE MAXIMUM RATINGS GND, DACREF ..................-0.3V to +2.16V DD1.8 DD1 GND, DACREF ........-0.3V to +3.9V DD3.3 CLK DD3.3 DATACLK, A0–A11, ...

Page 3

Interpolating and Modulating ELECTRICAL CHARACTERISTICS (continued) ( 1.8V DD1.8 DD1.8 CLK mode, 50Ω double-terminated outputs, external reference at 1.25V +25°C, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL ...

Page 4

Interpolating and Modulating Dual DAC with CMOS Inputs ELECTRICAL CHARACTERISTICS (continued) ( 1.8V DD1.8 DD1.8 CLK mode, 50Ω double-terminated outputs, external reference at 1.25V +25°C, unless otherwise noted.) ...

Page 5

Interpolating and Modulating ELECTRICAL CHARACTERISTICS (continued) ( 1.8V DD1.8 DD1.8 CLK mode, 50Ω double-terminated outputs, external reference at 1.25V +25°C, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL ...

Page 6

Interpolating and Modulating Dual DAC with CMOS Inputs ELECTRICAL CHARACTERISTICS (continued) ( 1.8V DD1.8 DD1.8 CLK mode, 50Ω double-terminated outputs, external reference at 1.25V +25°C, unless otherwise noted.) ...

Page 7

Interpolating and Modulating ( 1.8V DD1.8 DD1.8 CLK 50Ω load +25°C, unless otherwise noted.) A IN-BAND SFDR vs. OUTPUT FREQUENCY f = 125MWps, 2x INTERPOLATION DATA 120 -0.1dBFS -6dBFS 100 ...

Page 8

Interpolating and Modulating Dual DAC with CMOS Inputs ( 1.8V DD1.8 DD1.8 CLK 50Ω load +25°C, unless otherwise noted.) A GAIN MISMATCH vs. TEMPERATURE f = 125Msps, 2x INTERPOLATION DATA ...

Page 9

Interpolating and Modulating ( 1.8V DD1.8 DD1.8 CLK 50Ω load +25°C, unless otherwise noted.) A WCDMA ACLR vs. OUTPUT FREQUENCY f = 122.88MWps, 4x INTERPOLATION DATA 100 90 SINGLE-CARRIER ALTERNATE ...

Page 10

Interpolating and Modulating Dual DAC with CMOS Inputs PIN NAME 1 CLKP Noninverting Differential Clock Input 2 CLKN Inverting Differential Clock Input 22–25, N.C. Internally Connected. Do not connect. 40–43 Digital Power Supply. Accepts a ...

Page 11

Interpolating and Modulating PIN NAME Low Analog Power Supply. Accepts a 1.71V to 1.89V supply range. Bypass each pin to GND with 53 DD1.8 a 0.1µF capacitor as close to the pin as possible. 54, 56, ...

Page 12

Interpolating and Modulating Dual DAC with CMOS Inputs Detailed Description The MAX5893 dual, 500Msps, high-speed, 12-bit, cur- rent-output DAC provides superior performance in communication systems requiring low-distortion ana- log-signal reconstruction. The MAX5893 combines two DAC cores with 8x/4x/2x/1x ...

Page 13

Interpolating and Modulating When writing to the MAX5893, data is shifted into SDI; data is shifted out of SDO in a read operation. Bits the control byte are the address bits. These bits set ...

Page 14

Interpolating and Modulating Dual DAC with CMOS Inputs CS SCLK SDI SDO Figure 3. SPI Serial-Interface Timing Diagram 14 ______________________________________________________________________________________ SDS SDH t SDV ...

Page 15

Interpolating and Modulating Programming Registers Programming its registers with the SPI serial interface sets the MAX5893 operation modes. Table 2 shows all Table 2. MAX5893 Programmable Registers ADD BIT 7 BIT 6 Software Reset 0 = MSB first ...

Page 16

Interpolating and Modulating Dual DAC with CMOS Inputs Address 00h Bit 6 Logic 0 (default) causes the serial port to use MSB first address/data format. When set to a logic 1, the serial port will use LSB first ...

Page 17

Interpolating and Modulating Address 07h Bit 7 Logic 0 (default) adds the 10 bits offset cur- rent to OUTIN. A logic 1 adds the 10 bits off- set current to OUTIP. Address 08h Bits 7–0 These 8 bits ...

Page 18

Interpolating and Modulating Dual DAC with CMOS Inputs tionship and detects if the phase drifts more than ±1 data clock cycle. If this occurs, the synchronizer auto- matically reestablishes synchronization. However, dur- ing the resynchronization phase ...

Page 19

Interpolating and Modulating Interpolating Filter The MAX5893 features three cascaded FIR half-band filters. The interpolating filters are enabled or disabled in combinations to support 1x (no interpolation), 2x, 4x interpolation. Bits 7 and 6 of register ...

Page 20

Interpolating and Modulating Dual DAC with CMOS Inputs The programmable interpolation filters multiply the MAX5893 input data rate by a factor of 2x, 4x separate the reconstructed waveform spectrum and the DAC image. The original ...

Page 21

Interpolating and Modulating images at odd numbers of f are filtered. At the output of S the first filter, the images are then passed to the second interpolating filter, which is similar to ...

Page 22

Interpolating and Modulating Dual DAC with CMOS Inputs SIGNAL IMAGE INPUT SPECTRUM AND FIRST FILTER RESPONSE SIGNAL OUTPUT SPECTRUM OF THE FIRST FILTER INPUT SIGNAL SPECTRUM AND SECOND FILTER RESPONSE f 2f ...

Page 23

Interpolating and Modulating SIGNAL IMAGE INPUT SPECTRUM AND FIRST FILTER RESPONSE SIGNAL OUTPUT SPECTRUM OF THE FIRST FILTER INPUT SIGNAL SPECTRUM AND SECOND FILTER RESPONSE SIGNAL OUTPUT SPECTRUM OF ...

Page 24

Interpolating and Modulating Dual DAC with CMOS Inputs Digital Modulator The MAX5893 features digital modulation at frequen- cies and where the input to the modulator. f equals f ...

Page 25

Interpolating and Modulating Power-Down Mode The MAX5893 features three power-saving modes. Each DAC can be individually powered down through bits 2 and 3 of address 00h. The interpolation filters can also be powered down through bit 4 of ...

Page 26

Interpolating and Modulating Dual DAC with CMOS Inputs sources directly to the device without external resistors to define the DC level. The input resistance of CLKP and CLKN is 5kΩ. A convenient way to apply a differential signal ...

Page 27

Interpolating and Modulating amplitudes recommended to connect the trans- former center tap to ground transformer is not used, the outputs must have a resistive termination to ground. Figure 17 shows the MAX5893 output configured ...

Page 28

Interpolating and Modulating Dual DAC with CMOS Inputs For stable operation with the internal reference, REFIO should be decoupled to GND with a 1µF capacitor. REFIO must be buffered with an external amplifier, if heavy loading is required, ...

Page 29

Interpolating and Modulating Power Supplies, Bypassing, Decoupling, and Layout Grounding and power-supply decoupling strongly influ- ence the MAX5893 performance. Unwanted digital crosstalk can couple through the input, reference, power-supply, and ground connections, which can affect dynamic specifications like ...

Page 30

Interpolating and Modulating Dual DAC with CMOS Inputs However, noise sources such as thermal noise, refer- ence noise, clock jitter, etc. affect the ideal reading. Therefore, SNR is computed by taking the ratio of the RMS signal to ...

Page 31

Interpolating and Modulating TOP VIEW 68 67 EXPOSED PADDLE CLKP 1 CLKN 2 N.C. 3 N. VDD1.8 A11 7 A10 VDD3.3 DATACLK ...

Page 32

Interpolating and Modulating Dual DAC with CMOS Inputs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 32 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 68L ...

Page 33

... Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 33 © 2007 Maxim Integrated Products Dual DAC with CMOS Inputs Package Information (continued) PACKAGE OUTLINE, 68L QFN, 10x10x0 registered trademark of Maxim Integrated Products, Inc 21-0122 2 ...

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