max5858a Maxim Integrated Products, Inc., max5858a Datasheet

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max5858a

Manufacturer Part Number
max5858a
Description
Max5858a Dual, 10-bit, 300msps, Dac With 4x/2x/1x Interpolation Filters And Pll
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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The MAX5858A dual, 10-bit, 300Msps digital-to-analog
converter (DAC) provides superior dynamic performance
in wideband communication systems. The MAX5858A
integrates two 10-bit DAC cores, 4x/2x/1x programmable
digital interpolation filters, phase-lock loop (PLL) clock
multiplier, and a 1.24V reference. The MAX5858A sup-
ports single-ended and differential modes of operation.
The MAX5858A 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
analog 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 signals for interpolating filter operation and
DAC core conversion. 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 MAX5858A to be updated on a
single 10-bit bus.
The MAX5858A 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 channels through a single resistor. The internal ref-
erence can be disabled and an external reference can
be applied for high-accuracy applications.
The MAX5858A 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-con-
trol operation: normal, low-power standby, and com-
plete power-down. In power-down mode, the operating
current is reduced to 1µA.
The MAX5858A 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.
19-2999; Rev 0; 10/03
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
Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x
________________________________________________________________ Maxim Integrated Products
General Description
Applications
Interpolation Filters and PLL
o 10-Bit Resolution, Dual DAC
o 300Msps Update Rate
o Integrated 4x/2x/1x Interpolating Filters
o Internal PLL Multiplier
o 2.7V to 3.3V Single Supply
o Full Output Swing and Dynamic Performance at
o Superior Dynamic Performance
o Programmable Channel Gain Matching
o Integrated 1.24V Low-Noise Bandgap Reference
o Single-Resistor Gain Control
o Interleave Data Mode
o Differential Clock Input Modes
o EV Kit Available—MAX5858AEVKit
*EP = Exposed paddle.
MAX5858AECM
2.7V Supply
DA8/DACEN
DA7/F2EN
DA6/F1EN
NOTE: EXPOSED PADDLE CONNECTED TO GND.
73dBc SFDR at f
UMTS ACLR = 63dB at f
DA5/G3
DA4/G2
DA3/G1
DA2/G0
DGND
DV DD
PART
DA0
DA1
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
Ordering Information
OUT
-40°C to +85°C
TEMP RANGE
TQFP-EP
MAX5858A
= 20MHz
Pin Configuration
EP
42 41 40 39 38 37
OUT
= 30.7MHz
PIN-PACKAGE
48 TQFP-EP*
Features
36
35
34
33
32
31
30
29
28
27
26
25
CLKXN
PLLF
PGND
PV DD
CLKXP
PLLEN
LOCK
REN
CW
DB0
1

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max5858a Summary of contents

Page 1

... DAC core conversion. 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 MAX5858A to be updated on a single 10-bit bus. The MAX5858A features digital control of channel gain matching to within ± ...

Page 2

Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x Interpolation Filters and PLL ABSOLUTE MAXIMUM RATINGS AGND, DGND, PGND ..........-0. DA9–DA0, DB9–DB0, CW, REN, PLLF, PLLEN to AGND, DGND, PGND........................................................-0.3V to +4V ...

Page 3

Dual, 10-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, 10-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, 10-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, 10-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, 10-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, 10-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, 10-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, 10-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, 10-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

... Channel A Input Data Bit 2/Channel A Gain Adjustment Bit 0 11 DA1 Channel A Input Data Bit 1 12 DA0 Channel A Input Data Bit 0 (LSB) 12 ______________________________________________________________________________________ Typical Operating Characteristics (continued) DYNAMIC RESPONSE FALL TIME 200mV/div R = 50Ω L SINGLE ENDED FUNCTION = 20mA, FS MAX5858A toc34 200mV/div 10ns/div Pin Description ...

Page 13

Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x PIN NAME 13 DB9 Channel B Input Data Bit 9 (MSB) 14 DB8 Channel B Input Data Bit 8 15 DB7 Channel B Input Data Bit 7 16 DB6 Channel B Input Data Bit ...

Page 14

... The full-scale output current range is adjustable from 2mA to 20mA to optimize power dissipation and gain control. The MAX5858A accepts an input data rate 165MHz or a DAC conversion rate 300MHz. The inputs are latched on the rising edge of the clock where- as the output latches on the following rising edge. ...

Page 15

... Interpolation Filters and PLL The programmable interpolation filters multiply the MAX5858A input data rate by a factor of two or four to separate the reconstructed waveform spectrum and the first image. The original spectral images, appearing around multiples of the DAC input data rate, are attenu- ated at least 60dB by the internal digital filters ...

Page 16

... Filter gain/phase match FS ANALOG OUT MAINTAINED OVER ENTIRE SUPPLY RANGE 2.7V TO 3.3V 10 CHA AOUT DAC 10 CHB BOUT DAC DIV-4 DIV-2 DIV-1 MAX5858A DISADVANTAGE • High order filter • Filter gain/phase match • High clock rate • High data rate • None ...

Page 17

... This example demonstrates that 4x interpolation with digital filtering yields significant benefits in reducing sys- tem complexity, improving dynamic performance and lowering cost. Data can be written to the MAX5858A at much lower speeds while achieving image attenuation greater than 60dB and image separation beyond three octaves ...

Page 18

... and I REFO SET is the reference resistor that determines the amplifier out- put current of the MAX5858A (Figure 4). This current is mirrored into the current-source array where I distributed between matched current segments and summed to valid output current readings for the DACs. REN 1.24V ...

Page 19

... Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x External Reference To disable the internal reference of the MAX5858A, con- nect REN Apply a temperature-stable, external DD reference to REFO to set the full-scale output (Figure 5). For improved accuracy and drift performance, choose a fixed output voltage reference such as the MAX6520 bandgap reference ...

Page 20

... Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x Interpolation Filters and PLL Figure 6 depicts the write cycle of the MAX5858A in 4x interpolation mode. With the interpolation feature enabled, the device can operate with the PLL enabled or disabled. With the PLL disabled (PLLEN = 0), the clock signal is applied to CLKXP/CLKXN and internally divided generate the DAC’ ...

Page 21

... CLK IS AN OUTPUT WHEN PLL IS DISABLED WITH PLLEN CONNECTED TO GND, OTHERWISE INPUT. Figure 7. Timing Diagram for Interleave Data Mode (IDE = High) The MAX5858A can operate in interleave data mode by setting IDE = 1. In interleave data mode, data for both DAC channels is written through input port A. Channel ...

Page 22

... Analog quadrature upconverters have a DC common-mode input require- ment of typically 0.7V to 1.0V. The MAX5858A differential I/Q outputs can maintain the desired full-scale original level at the required 0.7V to 1.0V DC common-mode volt- age when powered from a single 2.85V (±5%) supply. ...

Page 23

... Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x The MAX5858A is packaged in a 48-pin TQFP-EP pack- age, providing design flexibility, increased thermal effi- ciency, and optimized AC performance of the DAC. The EP enables the implementation of grounding techniques, which are necessary to ensure highest performance operation. In this package, the data converter die is attached to ...

Page 24

Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x Interpolation Filters and PLL A gain error is the difference between the ideal and the actual full-scale output current on the transfer curve, after nullifying the offset error. This error alters the slope of ...

Page 25

Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, (The package drawing(s) in this data sheet may not reflect the most current specifications. ...

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