MAX5856AECM+TD Maxim Integrated Products, MAX5856AECM+TD Datasheet

IC DAC 8BIT DUAL 300MSPS 48-TQFP

MAX5856AECM+TD

Manufacturer Part Number
MAX5856AECM+TD
Description
IC DAC 8BIT DUAL 300MSPS 48-TQFP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5856AECM+TD

Settling Time
11ns
Number Of Bits
8
Data Interface
Parallel
Number Of Converters
2
Voltage Supply Source
Single Supply
Power Dissipation (max)
792mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX5856A dual, 8-bit, 300Msps digital-to-analog
converter (DAC) provides superior dynamic performance
in wideband communication systems. The MAX5856A
integrates two 8-bit DAC cores, 4x/2x/1x programmable
digital interpolation filters, phase-lock loop (PLL) clock
multiplier, and a 1.24V reference. The MAX5856A sup-
ports single-ended and differential modes of operation.
The MAX5856A dynamic performance is maintained over
the entire power-supply operating range of 2.7V to 3.3V.
The analog outputs support a compliance voltage of
-1.0V to +1.25V.
The 4x/2x/1x programmable interpolation filters feature
excellent passband distortion and noise performance.
Interpolating filters minimize the design complexity of ana-
log reconstruction filters while lowering the data bus and
the clock speeds of the digital interface. The PLL multiplier
generates all internal synchronized high-speed clock sig-
nals for interpolating filter operation and DAC core conver-
sion. The internal PLL helps minimize system complexity
and lower cost. To reduce the I/O pin count, the DAC can
also operate in interleave data mode. This allows the
MAX5856A to be updated on a single 8-bit bus.
The MAX5856A features digital control of channel gain
matching to within ±0.4dB in sixteen 0.05dB steps.
Channel matching improves sideband suppression in
analog quadrature modulation applications. The on-chip
1.24V bandgap reference includes a control amplifier
that allows external full-scale adjustments of both chan-
nels through a single resistor. The internal reference can
be disabled and an external reference may be applied
for high-accuracy applications.
The MAX5856A features full-scale current outputs of
2mA to 20mA and operates from a 2.7V to 3.3V single
supply. The DAC supports three modes of power-control
operation: normal, low-power standby, and complete
power-down. In power-down mode, the operating cur-
rent is reduced to 1µA.
The MAX5856A is packaged in a 48-pin TQFP with
exposed paddle (EP) for enhanced thermal dissipation
and is specified for the extended (-40°C to +85°C) opera-
ting temperature range.
19-3019; Rev 1; 3/04
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.
Communications
Wireless Base Stations
Direct Digital Synthesis
Instrumentation/ATE
SATCOM, LMDS, MMDS, HFC, DSL, WLAN,
Point-to-Point Microwave Links
________________________________________________________________ Maxim Integrated Products
Dual 8-Bit, 300Msps DAC with 4x/2x/1x
General Description
Applications
Interpolation Filters and PLL
*EP = Exposed paddle.
MAX5856AECM
8-Bit Resolution, Dual DAC
300Msps Update Rate
Integrated 4x/2x/1x Interpolating Filters
Internal PLL Multiplier
2.7V to 3.3V Single Supply
Full Output Swing and Dynamic Performance at
2.7V Supply
Superior Dynamic Performance: 68dBc SFDR at
f
Programmable Channel Gain Matching
Integrated 1.24V Low-Noise Bandgap Reference
Single-Resistor Gain Control
Interleave Data Mode
Differential Clock Input Modes
EV Kit Available—MAX5858AEVKIT
OUT
DA6/DACEN
NOTE: EXPOSED PADDLE CONNECTED TO GND.
TOP VIEW
DA5/F2EN
DA4/F1EN
PART
DA7/PD
DA3/G3
DA2/G2
DA1/G1
DA0/G0
DGND
= 20MHz
DV
N.C.
N.C.
DD
10
11
12
1
2
3
4
5
6
7
8
9
48 47 46 45 44 43
13 14 15 16 17 18 19 20 21 22 23 24
-40°C to +85°C
TEMP RANGE
Ordering Information
TQFP-EP
MAX5856A
Pin Configuration
EP
42 41 40 39 38 37
PIN-PACKAGE
48 TQFP-EP*
Features
36
35
34
33
32
31
30
29
28
27
26
25
REF0
REN
PLLF
PGND
PV
CLKXN
CLKXP
PLLEN
LOCK
CW
N.C.
N.C.
DD
1

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MAX5856AECM+TD Summary of contents

Page 1

... SATCOM, LMDS, MMDS, HFC, DSL, WLAN, Point-to-Point Microwave Links Wireless Base Stations Direct Digital Synthesis Instrumentation/ATE ________________________________________________________________ Maxim Integrated Products 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. Interpolation Filters and PLL 8-Bit Resolution, Dual DAC ...

Page 2

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL ABSOLUTE MAXIMUM RATINGS AGND, DGND, PGND ..........-0. CW, REN, PLLF, PLLEN to AGND, DA7–DA0, DB7–DB0, DGND, PGND........................................................-0.3V to +4V ...

Page 3

Dual 8-Bit, 300Msps DAC with 4x/2x/1x ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = PGND = 1.2V 20mA, output amplitude = 0dB FS, differential output, ...

Page 4

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = PGND = 1.2V 20mA, output amplitude = ...

Page 5

Dual 8-Bit, 300Msps DAC with 4x/2x/1x ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = PGND = 1.2V 20mA, output amplitude = 0dB FS, differential output, ...

Page 6

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = PGND = 1.2V 20mA, output amplitude = ...

Page 7

Dual 8-Bit, 300Msps DAC with 4x/2x/1x ( 3V, AGND = DGND = PGND = 0, external reference = 1.2V, no interpolation, PLL disabled differential output +25°C, unless otherwise noted.) ...

Page 8

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL ( 3V, AGND = DGND = PGND = 0, external reference = 1.2V, no interpolation, PLL disabled differential output ...

Page 9

Dual 8-Bit, 300Msps DAC with 4x/2x/1x ( 3V, AGND = DGND = PGND = 0, external reference = 1.2V, no interpolation, PLL disabled differential output +25°C, unless otherwise noted.) ...

Page 10

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL ( 3V, AGND = DGND = PGND = 0, external reference = 1.2V, no interpolation, PLL disabled differential output ...

Page 11

Dual 8-Bit, 300Msps DAC with 4x/2x/1x ( 3V, AGND = DGND = PGND = 0, external reference = 1.2V, no interpolation, PLL disabled differential output +25°C, unless otherwise noted.) ...

Page 12

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL PIN NAME 15 DB5 Channel B Input Data Bit 5 16 DB4 Channel B Input Data Bit 4 17 DB3 Channel B Input Data Bit 3 Clock Output/Input. CLK becomes ...

Page 13

Dual 8-Bit, 300Msps DAC with 4x/2x/ MAX5856A 8 DA7–DA0 REGISTER 8 DB7–DB0 REGISTER IDE CW Detailed Description The MAX5856A dual, high-speed, 8-bit, current-output DAC provides superior performance in communication systems requiring low-distortion analog-signal recon- struction. The MAX5856A combines ...

Page 14

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL Device Power-Up and States of Operation At power-up, the MAX5856A is configured in no-inter- polation mode with a gain adjustment setting of 0dB and a fully operational converter. In shutdown, ...

Page 15

Dual 8-Bit, 300Msps DAC with 4x/2x/1x SINGLE 8-BIT BUS SAVES I/O PINS DIGITAL BASEBAND OFDM PROCESSOR QAM-MAPPER DATA CLOCK OUT f = 71.6MHz DATA Figure 2. Typical Application Circuit Table 4. Benefits of Interpolation OPTION SOLUTION • No interpolation 1 ...

Page 16

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL SOLUTION 1 f OUT 20MHz ±10MHz SOLUTION 2 f OUT 20MHz BW = ±10MHz SOLUTION 3 f OUT 20MHz BW = ±10MHz Figure 3. MAX5856A in 4x Interpolation Mode This ...

Page 17

Dual 8-Bit, 300Msps DAC with 4x/2x/1x PLL Clock Multiplier and The MAX5856A features an on-chip PLL clock multipli- er, which generates all internal, synchronized high- speed clock signals required by the input data latches, interpolation filters, and DAC cores. The ...

Page 18

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL External Reference To disable the internal reference of the MAX5856A, con- nect REN Apply a temperature-stable, external DD reference to REFO to set the full-scale output (Figure ...

Page 19

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Figure 6 illustrates the DAC write cycle in 4x interpola- tion mode. With the interpolation feature enabled, the device can operate with the PLL enabled or disabled. To obtain best phase noise performance, disable ...

Page 20

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL 1 CLKXN t CXD 1 CLKXP 2 CLK DA DA0–DA7 N t DCSR 1. CLKXP AND CLKXN MUST BE PRESENT ONLY WHEN PLL IS DISABLED, WITH PLLEN CONNECTED TO GND. ...

Page 21

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Differential DC-Coupled Configuration Figure 9 shows the MAX5856A output operating in differ- ential DC-coupled mode. This configuration can be used in communication systems employing analog quadrature upconverters and requiring a baseband sampling, dual- channel, ...

Page 22

Dual 8-Bit, 300Msps DAC with 4x/2x/1x Interpolation Filters and PLL The MAX5856A is packaged in a 48-pin TQFP-EP package, providing design flexibility, increased thermal efficiency, and optimized AC performance of the DAC. The EP enables the implementation of grounding tech- ...

Page 23

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. 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 ____________________ 23 © 2004 Maxim Integrated Products ...

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