MAXIM MAX5893 Technical data

General Description
The MAX5893 programmable interpolating, modulating, 500Msps, dual digital-to-analog converter (DAC) offers superior dynamic performance and is optimized for high­performance wideband, single-carrier transmit applica­tions. 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 cir­cuit. 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 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 fIM/2 or fIM/4.
The MAX5893 features a standard 1.8V CMOS, 3.3V tol­erant 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 fil­ters, f
IM
/2, fIM/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
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, fIM/2, or f
IM
/4 Selectable Output Filter: Lowpass or Highpass Channel Gain and Offset Adjustment
o EV Kit Available (Order the MAX5893EVKIT)
MAX5893
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
Simplified Diagram
19-3546; Rev 2; 10/08
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.
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc. cdma2000 is a registered trademark of Telecommunications
Industry Association.
Selector Guide
D = Dry pack.
*
EP = Exposed pad.
+
Denotes a lead-free/RoHS-compliant package.
EVALUATION KIT
AVAILABLE
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*
PART
MAX5893 12 500 CMOS
MAX5894 14 500 CMOS
MAX5895 16 500 CMOS
MAX5898 16 500 LVDS
RESOLUTION
(BITS)
DAC UPDATE
RATE (Msps)
DATA
PORT A
DATACLK
DATA
PORT B
DATA SYNCH
AND DEMUX
FILTERS
INTERPOLATING
1x/2x/4x
MODULATOR
FILTERS
INTERPOLATING
DAC
2x
DAC
INPUT
LOGIC
OUTI
OUTQ
MAX5893
12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, DATACLK input mode, dual-port
mode, 50double-terminated outputs, external reference at 1.25V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C, unless otherwise noted.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DV
DD1.8
, AV
DD1.8
to GND, DACREF ..................-0.3V to +2.16V
AV
DD3.3
, AV
CLK
, DV
DD3.3
to GND, DACREF........-0.3V to +3.9V
DATACLK, A0–A11, B0–B9,
SELIQ/B11, DATACLK/B10, CS, RESET, SCLK,
SDI and SDO to GND, DACREF......-0.3V to (DV
DD3.3
+ 0.3V)
CLKP, CLKN to GND, DACREF..............-0.3V to (AV
CLK
+ 0.3V)
REFIO, FSADJ to GND, DACREF ........-0.3V to (AV
DD3.3
+ 0.3V)
OUTIP, OUTIN, OUTQP,
OUTQN to GND, DACREF..................-1V to (AV
DD3.3
+ 0.3V)
SDO, DATACLK, DATACLK/BIO Continuous Current ..........8mA
Continuous Power Dissipation (TA= +70°C)
68-Pin QFN (derate 41.7mW/°C above +70°C)
(Note 1) ...................................................................3333.3mW
Junction Temperature......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Thermal Resistance θ
JC
(Note 1)....................................0.8°C/W
Note 1: Thermal resistance based on a multilayer board with 4 x 4 via array in exposed pad area.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STATIC PERFORMANCE
Resolution 12 Bits
Differential Nonlinearity DNL ±0.5 LSB
Integral Nonlinearity INL ±1 LSB
Offset Error OS -0.025 ±0.003 +0.025 %FS
Offset Drift ±0.03 ppm/°C
Full-Scale Gain Error GE
FS
Gain-Error Drift ±110 ppm/°C
Full-Scale Output Current I
OUTFS
Output Compliance -0.5 +1.1 V
Output Resistance R
Output Capacitance C
OUT
OUT
DYNAMIC PERFORMANCE
Maximum Clock Frequency f
Minimum Clock Frequency f
Maximum DAC Update Rate f
Minimum DAC Update Rate f
Maximum Input Data Rate f
CLK
CLK
DAC
DAC
DATA
f
= f
DAC
f
= f
DAC
f
DATACLK
f
= 16MHz, f
OUT
CLK
CLK
= 125MHz,
= 10MHz, -12dBFS
Noise Spectral Density
f
DATACLK
f
OUT
= 125MHz,
= 16MHz, f
= 10MHz, 0dBFS
-4 ±0.6 +4 %FS
220mA
1M
5pF
500 MHz
or f
or f
DAC
DAC
= f
/2 500 Msps
CLK
= f
/2 1 Msps
CLK
125 MWps
No interpolation -151
OFFSET
2x interpolation -147
4x interpolation -148
OFFSET
4x interpolation -145
1 MHz
dBFS/
Hz
MAX5893
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, DATACLK input mode, dual-port
mode, 50double-terminated outputs, external reference at 1.25V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
In-Band SFDR (DC to f
DATA
/2)
SFDR
Two-Tone IMD TTIMD
f
DATACLK
= 125MHz,
interpolation off, 0dBFS
f
DATACLK
= 125MHz,
2x interpolation, 0dBFS
f
DATACLK
= 125MHz,
4x interpolation, 0dBFS
f
DATACLK
f
OUT1
= 125MHz,
= 9MHz, f
OUT2
10MHz, -6.1dBFS
f
= 125MHz, f
DATA
= 79MHz, f
OUT2
=
80MHz, -6.1dBFS
f
DATACLK
f
OUT1
= 62.5MHz,
= 9MHz, f
OUT2
10MHz, -6.1dBFS
f
= 10MHz 90
OUT
f
= 30MHz 83
OUT
= 50MHz 72
f
OUT
f
= 10MHz 77 88
OUT
f
= 30MHz 83
OUT
f
= 50MHz 84
OUT
f
= 10MHz 90
OUT
f
= 30MHz 84
OUT
f
= 50MHz 86
OUT
No interpolation -100
2x interpolation -100
=
4x interpolation -100
2x interpolation, f
OUT1
/4 complex
IM
modulation
-73
4x interpolation,
/4 complex
f
IM
-75
modulation
=
8x interpolation -99
dBc
dBc
Four-Tone IMD FTIMD
ACLR for WCDMA (Note 3)
ACLR
f
DATACLK
f
OUT1
= 70MHz, -6.1dBFS
f
DATACLK
f
OUT1
= 180MHz, -6.1dBFS
f
DATACLK
= 62.5MHz,
= 69MHz, f
= 62.5MHz,
= 179MHz, f
= 125MHz, f
OUT2
OUT2
8x interpolation,
/4 complex
f
IM
modulation
8x, highpass interpolation, f
/4 complex
IM
modulation
spaced 1MHz
OUT
apart from 32MHz, -12dBFS, 2x interpolation
f
DATACLK
f
OUT
f
DATACLK
= 61.44MHz,
= baseband
=
122.88MHz, f
61.44MHz
f
DATACLK
=
122.88MHz, f
122.88MHz
OUT
OUT
=
=
4x interpolation 74
8x interpolation 73
2x interpolation, fIM/4 complex modulation
4x interpolation, fIM/4 complex modulation
-67
-62
-93 dBc
73
dB
69
MAX5893
12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, DATACLK input mode, dual-port
mode, 50double-terminated outputs, external reference at 1.25V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C, unless otherwise noted.) (Note 2)
Output Propagation Delay t
Output Rise Time t
Output Fall Time t
Output Settling Time To 0.5% (Note 5) 11 ns
Output Bandwidth -1dB bandwidth (Note 6) 240 MHz
Passband Width Ripple < -0.01dB
Stopband Rejection
Data Latency
DAC INTERCHANNEL MATCHING
Gain Match ∆Gain f Gain-Match Tempco ∆Gain/°C I Phase Match ∆Phase f Phase-Match Tempco Phase/°C f
DC Gain Match I
Channel-to-Channel Crosstalk f
REFERENCE
Reference Input Range 0.125 1.250 V
Reference Output Voltage V
Reference Input Resistance R
Reference Voltage Drift ±50 ppm/°C
CMOS LOGIC INPUT/OUTPUT (A11–A0, SELIQ/B11, DATACLK/B10, B9–B0, DATACLK)
Input High Voltage V
Input Low Voltage V
Input Current I
Input Capacitance C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PD
RISE
FALL
REFIO
REFIO
IH
IL
IN
IN
1x interpolation (Note 4) 2.9 ns
10% to 90% (Note 5) 0.75 ns
10% to 90% (Note 5) 1 ns
0.604 x f
0.604 x f
0.604 x f
1x interpolation 22
2x interpolation 70
4x interpolation 146
8x interpolation 311
OUT
OUTFS
OUT
OUT
OUTFS
OUT
Internal reference 1.14 1.20 1.27 V
DATA
DATA
DATA
= DC - 80MHz, I
= 20mA ±0.02 ppm/°C
= 60MHz, I
= 60MHz, I
= 20mA -0.2 ±0.04 +0.2 dB
= 50MHz, f
0.4 x
f
DATA
, 2x interpolation 100
, 4x interpolation 100
, 8x interpolation 100
= 20mA ±0.1 dB
OUTFS
= 20mA ±0.13 Deg
OUTFS
= 20mA ±0.006 Deg/°C
OUTFS
= 250MHz, 0dBFS -90 dB
DAC
10 k
0.7 x
DV
DD1.8
0.3 x
DV
±1 ±20 µA
3pF
DD1.8
dB
Clock
Cycles
V
V
MAX5893
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, DATACLK input mode, dual-port
mode, 50double-terminated outputs, external reference at 1.25V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C, unless otherwise noted.) (Note 2)
Output High Voltage V
Output Low Voltage V
Output Leakage Current Three-state 1 µA
Rise/Fall Time C
CLOCK INPUT (CLKP, CLKN)
Differential Input Voltage Swing V
Differential Input Slew Rate > 100 V/µs
Common-Mode Voltage V
Input Resistance R
Input Capacitance C
Minimum Clock Duty Cycle 45 %
Maximum Clock Duty Cycle 55 %
CLKP/CLKN, DATACLK TIMING (Figure 4) (Notes 7, 8)
CLK to DATACLK Delay t
Data Hold Time, DATACLK Input/Output (Pin 14)
Data Setup Time, DATACLK Input/Output (Pin 14)
Data Hold Time, DATACLK/B10 Input/Output (Pin 27)
Data Setup Time, DATACLK/B10 Input/Output (Pin 27)
SERIAL PORT INTERFACE TIMING (Figure 3) (Note 7)
SCLK Frequency f CS Setup Time t
Input Hold Time t
Input Setup Time t
Data Valid Duration t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OH
OL
DIFF
COM
CLK
CLK
D
t
DH
t
DS
t
DH
t
DS
SCLK
SS
SDH
SDS
SDV
200µA load
200µA load
Sine-wave input > 1.5
Square-wave input > 0.5
AC-coupled AV
DATACLK output mode, C
Capturing rising edge 1.0
Capturing falling edge 2.1
Capturing rising edge 0.4
Capturing falling edge -0.7
Capturing rising edge 1.0
Capturing falling edge 2.3
Capturing rising edge 0.2
Capturing falling edge -0.4
= 10pF, 20% to 80% 1.6 ns
LOAD
0.8 x
DV
DD3.3
= 10pF 6.2 ns
LOAD
2.5 ns
0ns
4.5 ns
6.5 16.5 ns
0.2 x
DV
DD3.3
/2 V
CLK
5k
3pF
10 MHz
V
V
V
P-P
ns
ns
ns
ns
MAX5893
12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, DATACLK input mode, dual-port
mode, 50double-terminated outputs, external reference at 1.25V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C, unless otherwise noted.) (Note 2)
Note 2: All specifications are 100% tested at T
A
+25°C. Specifications at TA< +25°C are guaranteed by design and characteriza-
tion data.
Note 3: 3.84MHz bandwidth, single carrier. Note 4: Excludes data latency. Note 5: Measured single-ended into a 50load. Note 6: Excludes sin(x)/x rolloff. Note 7: Guaranteed by design and characterization. Note 8: Setup and hold time specifications characterized with 3.3V CMOS logic levels. Note 9: Parameter defined as the change in midscale output caused by a ±5% variation in the nominal supply voltage.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLIES
Digital Supply Voltage DV
Digital I/O Supply Voltage DV
Clock Supply Voltage AV
Analog Supply Voltage
AV
AV
I
AVDD3.3
Analog Supply Current
I
AVDD1.8
Digital Supply Current I
Digital I/O Supply Current I
Clock Supply Current I
DVDD1.8
DVDD3.3
AVCLK
Total Power Dissipation P
Power-Down Current
AV Ratio
Power-Supply Rejection
DD3.3
PSRR
DD1.8
DD3.3
CLK
DD3.3
DD1.8
TOTAL
1.71 1.8 1.89 V
3.0 3.3 3.6 V
3.135 3.3 3.465 V
3.135 3.3 3.465
1.71 1.8 1.89
f
= 250MHz, 2x interpolation, 0dBFS,
CLK
f
= 10MHz, DATACLK output mode
OUT
f
= 250MHz, 2x interpolation, 0dBFS,
CLK
f
= 10MHz, DATACLK output mode
OUT
f
= 250MHz, 2x interpolation, 0dBFS,
CLK
= 10MHz, DATACLK output mode
f
OUT
f
= 250MHz, 2x interpolation, 0dBFS,
CLK
= 10MHz, DATACLK output mode
f
OUT
f
= 250MHz, 2x interpolation, 0dBFS,
CLK
= 10MHz, DATACLK output mode
f
OUT
110 130
27 32
205 250 mA
21 32 mA
35mA
511 mW
AV
DD3.3
AV
DV
DV
AV
DD1.8
DD1.8
DD3.3
CLK
All I/O are static high or low, bit 2 to bit 4 of address 00h are set high
(Note 9) 0.05 %FS/V
A
450
1
10
100
1
V
mA
µA
MAX5893
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
_______________________________________________________________________________________
7
Y
Typical Operating Characteristics
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, output is transformer-coupled to
50load, T
A
= +25°C, unless otherwise noted.)
IN-BAND SFDR vs. OUTPUT FREQUENCY
f
120
100
80
60
SFDR (dBc)
40
20
0
050
IN-BAND SFDR vs. OUTPUT FREQUENCY
f
120
100
80
60
SFDR (dBc)
40
20
0
050
IN-BAND SFDR vs. OUTPUT FREQUENCY
f
90
80
70
60
50
40
SFDR (dBc)
30
20
10
0
125 175
DATA
SPURS MEASURED BETWEEN 0MHz AND 62.5MHz
DATA
SPURS MEASURED BETWEEN 0MHz AND 62.5MHz
DATA
-6dBFS
UPPER SIDEBAND MODULATION SPURS MEASURED BETWEEN 125MHz AND 187.5MHz
= 125MWps, 2x INTERPOLATION
-6dBFS
-12dBFS
OUTPUT FREQUENCY (MHz)
-0.1dBFS
40302010
= 125MWps, 4x INTERPOLATION
-6dBFS
OUTPUT FREQUENCY (MHz)
-0.1dBFS
-12dBFS
40302010
= 125MWps, 4x INTERPOLATION
-0.1dBFS
-12dBFS
165155145135
OUTPUT FREQUENCY (MHz)
MAX5893 toc01
MAX5893 toc04
MAX5893 toc07
100
SFDR (dBc)
SFDR (dBc)
120
100
TWO-TONE IMD (-dBc)
0UT-OF-BAND SFDR vs. OUTPUT FREQUENCY
= 125MWps, 2x INTERPOLATION
f
DATA
-12dBFS
90
80
70
60
50
40
30
20
10
-6dBFS
-0.1dBFS
SPURS MEASURED BETWEEN
62.5MHz AND 125MHz
0
050
OUTPUT FREQUENCY (MHz)
40302010
MAX5893 toc02
OUT-OF-BAND SFDR vs. OUTPUT FREQUENC
f
= 125MWps, 4x INTERPOLATION
DATA
90
80
70
60
-6dBFS
50
40
30
20
SPURS MEASURED BETWEEN
10
62.5MHz AND 250MHz
0
050
-0.1dBFS
MAX5893 toc05
-12dBFS
40302010
OUTPUT FREQUENCY (MHz)
TWO-TONE IMD vs. OUTPUT FREQUENCY
= 125MWps, 2x INTERPOLATION
f
DATA
80
60
40
20
0
0
-9dBFS
1MHz CARRIER SPACING COMPLEX MODULATION FOR OUTPUT FREQUENCIES GREATER THAN 50MHz
CENTER FREQUENCY (MHz)
-12dBFS
-6dBFS
MAX5893 toc08
100755025
IN-BAND SFDR vs. OUTPUT FREQUENCY
= 125MWps, 2x INTERPOLATION
f
DATA
90
80
70
60
50
40
SFDR (dBc)
30
20
UPPER SIDEBAND MODULATION SPURS MEASURED BETWEEN
10
62.5MHz AND 125MHz
0
62.5 112.5
IN-BAND SFDR vs. OUTPUT FREQUENCY
= 125MWps, 4x INTERPOLATION
f
DATA
100
90
80
70
60
-6dBFS
50
SFDR (dBc)
40
30
20
LOWER SIDEBAND MODULATION SPURS MEASURED BETWEEN
10
62.5MHz AND 125MHz
0
75 125
TWO-TONE IMD vs. OUTPUT FREQUENCY
f
DATA
120
90
60
TWO-TONE IMD (-dBc)
30
1MHz CARRIER SPACING COMPLEX MODULATION FOR OUTPUT FREQUENCIES GREATER THAN 50MHz
0
0
-6dBFS
-0.1dBFS -12dBFS
102.592.582.572.5
OUTPUT FREQUENCY (MHz)
-0.1dBFS
-12dBFS
1151059585
OUTPUT FREQUENCY (MHz)
= 125Msps, 4x INTERPOLATION
-6dBFS
-12dBFS
-9dBFS
150120906030
CENTER FREQUENCY (MHz)
MAX5893 toc03
MAX5893 toc06
MAX5893 toc09
MAX5893
12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, output is transformer-coupled to
50load, T
A
= +25°C, unless otherwise noted.)
GAIN MISMATCH vs. TEMPERATURE
= 125Msps, 2x INTERPOLATION
f
DATA
0.100
f
= 22.7MHz
OUT
= -6dBFS
A
OUT
0.075
0.050
GAIN MISMATCH (dB)
0.025
0
-40 85
TEMPERATURE (°C)
603510-15
MAX5893 toc10
DIFFERENTIAL NONLINEARITY
vs. DIGITAL INPUT CODE
1.0
0.5
0
DNL (LSB)
-0.5
-1.0 512
0 4096
1536
1024
DIGITAL INPUT CODE
2048
2560
3072
3584
MAX5893 toc11
INL (LSB)
1.00
0.75
0.50
0.25
0
-0.25
-0.50
-0.75
-1.00
INTEGRAL NONLINEARITY
vs. DIGITAL INPUT CODE
1536
512
0 4096
1024
DIGITAL INPUT CODE
2048
2560
3072
MAX5893 toc12
3584
SUPPLY CURRENTS vs. DAC UPDATE RATE
3.3V TOTAL
(MHz)
OUT
= 5MHz
250200150
2x INTERPOLATION, f
500
450
400
350
300
250
200
150
SUPPLY CURRENT (mA)
100
50
0
100 300
1.8V TOTAL
f
DAC
MAX5893 toc13
SUPPLY CURRENTS vs. DAC UPDATE RATE
1.8V TOTAL
3.3V TOTAL
(MHz)
OUT
= 5MHz
400300200
4x INTERPOLATION, f
500
450
400
350
300
250
200
150
SUPPLY CURRENT (mA)
100
50
0
100 500
f
DAC
SUPPLY CURRENTS vs. DAC UPDATE RATE
8x INTERPOLATION, f
500
450
MAX5893 toc14
400
350
300
250
200
150
SUPPLY CURRENT (mA)
100
50
0
100 500
f
(MHz)
DAC
OUT
1.8V TOTAL
3.3V TOTAL
= 5MHz
MAX5893 toc15
400300200
MAX5893
12-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
_______________________________________________________________________________________
9
Typical Operating Characteristics (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, output is transformer-coupled to
50load, T
A
= +25°C, unless otherwise noted.)
WCDMA ACLR vs. OUTPUT FREQUENCY
f
DATA
= 122.88MWps, 4x INTERPOLATION
MAX5893 toc16
f
CENTER
(MHz)
ACLR (dB)
1208040
50
60
70
80
90
100
40
0 160
SINGLE-CARRIER ALTERNATE CHANNEL
SINGLE-CARRIER ADJACENT CHANNEL
WCDMA ACLR vs. OUTPUT FREQUENCY
f
DATA
= 76.8MWps, 4x INTERPOLATION
MAX5893 toc17
f
CENTER
(MHz)
ACLR (dB)
8040
50
60
70
80
90
100
40
0
SINGLE-CARRIER ALTERNATE CHANNEL
SINGLE-CARRIER ADJACENT CHANNEL
MAX5893 toc18
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-120
WCDMA ACLR SPECTRAL PLOT
f
DATA
= 61.44MWps, 8x INTERPOLATION
f
CENTER
= 61.44MHz
SPAN = 25.5MHz
ACLR2 = 73dB
OUTPUT POWER (dBm)
ACLR1 = 73dB
ACLR1 = 72dB
ACLR2 = 73dB
CARRIER = -12dBm
WCDMA ACLR SPECTRAL PLOT = 122.88MWps, 4x INTERPOLATION
f
DATA
-20
-30
-40
-50
-60
-70
-80
-90
OUTPUT POWER (dBm)
-100
-110
-120
ACLR2 = 71dB
ACLR1 = 69dB
CARRIER = -14dBm
f
= 122.88MHz
CENTER
SPAN = 25.5MHz
ACLR2 = 70dB
ACLR1 = 69dB
MAX5893 toc19
MAX5893
12-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs
10 ______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 CLKP Noninverting Differential Clock Input
2 CLKN Inverting Differential Clock Input
3, 4, 5, 22–25,
40–43
6, 21, 30, 37 DV
7–12, 15–20 A11–A0
N.C. Internally Connected. Do not connect.
DD1.8
Digital Power Supply. Accepts a 1.71V to 1.89V supply range. Bypass each pin to ground with a
0.1µF capacitor as close to the pin as possible.
A-Port Data Inputs. Dual-port mode: I-channel data input. Data is latched on the rising/falling edge (programmable) of the DATACLK. Single-port mode: I-channel and Q-channel data input, with SELIQ.
13, 44 DV
14 DATACLK Programmable Data Clock Input/Output. See the DATACLK Modes section for details.
26 SELIQ/B11
27 DATACLK/B10
28, 29, 31–36,
38, 39
45 SDO Serial-Port Data Output
46 SDI Serial-Port Data Input
47 SCLK Serial-Port Clock Input. Data on SDI is latched on the rising edge of SCLK. 48 CS Serial-Port Interface Select. Drive CS low to enable serial-port interface. 49 RESET Reset Input. Set RESET low during power-up.
50 REFIO Reference Input/Output. Bypass to ground with a 1µF capacitor as close to the pin as possible.
51 DACREF
52 FSADJ
DD3.3
B9–B0
CMOS I/O Power Supply. Accepts a 3.0V to 3.6V supply range. Bypass each pin to ground with a
0.1µF capacitor as close to the pin as possible.
Select I/Q-Channel Input or B-Port MSB Input. Single-port mode: If SELIQ = LOW, data is latched into Q-channel on the rising/falling edge (programmable) of the DATACLK. If SELIQ = HIGH, data is latched into I-channel on the rising/falling edge (programmable) of the DATACLK. Dual-port mode: Q-channel MSB input.
Alternate DATACLK Input/Output or B-Port Bit 10 Input. Single-port mode: See the DATACLK Modes section for details. Dual-port mode: Q-channel bit 10 input. If unused connect to GND.
B-Port Data Bits 9–0. Dual-port mode: Q-channel inputs. Data is latched on the rising/falling (programmable) edge of the DATACLK. Single-port mode: Connect to GND.
C ur r ent- S et Resi stor Retur n P ath. For a 20m A ful l - scal e outp ut cur r ent, connect a 2kΩ r esi stor b etw een FS AD J and D AC RE F. Inter nal l y connected to GN D . D o no t u s e a s a n e x t e r n a l g r o u n d co n n e c t io n .
Full-Scale Adjust Input. This input sets the full-scale output current of the DAC. For a 20mA full­scale output current, connect a 2k resistor between FSADJ and DACREF.
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