Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) TQFN 24

General Description

The MAX5181 is a 10-bit, current-output digital-to-ana-

log converter (DAC) designed for superior performance

in signal reconstruction or arbitrary waveform genera-

tion applications requiring analog signal reconstruction

with low distortion and low-power operation. The

MAX5184 provides equal specifications, with on-chip

precision resistors for voltage-output operation. The

MAX5181/MAX5184 are designed for a 10pVs glitch

operation to minimize unwanted spurious signal com-

ponents at the output. An on-board 1.2V bandgap cir-

cuit provides a well-regulated, low-noise reference that

can be disabled for external reference operation.

The devices are designed to provide a high level of sig-

nal integrity for the least amount of power dissipation.

They operate from a single 2.7V to 3.3V supply.

Additionally, these DACs have three modes of opera-

tion: normal, low-power standby, and full shutdown,

which provides the lowest possible power dissipation

with a 1µA (max) shutdown current. A fast wake-up time

(0.5µs) from standby mode to full DAC operation facili-

tates power conservation by activating the DAC only

when required.

The MAX5181/MAX5184 are available in 24-pin QSOP

packages and are specified for the extended (-40°C to

+85°C) temperature range. Additionally, the MAX5184

is also available in a 24-pin TQFN with exposed pad

(EP) and is specified for the extended (-40°C to +85°C)

temperature range. For lower resolution, 8-bit versions,

refer to the MAX5187/MAX5190 data sheet.

Applications

Signal Reconstruction

Arbitrary Waveform Generators (AWGs)

Direct Digital Synthesis

Imaging Applications

Features

o 2.7V to 3.3V Single-Supply Operation

o Wide Spurious-Free Dynamic Range:

70dB at f

OUT

= 2.2MHz

o Fully Differential Output

o Low-Current Standby or Full Shutdown Modes

o Internal 1.2V, Low-Noise Bandgap Reference

o Small 24-Pin QSOP and Thin QFN Packages

10-Bit, 40MHz, Current/Voltage-Output DACs

________________________________________________________________

Maxim Integrated Products

REFO

REFR

DGND

AGND

OUTN

OUTP

CREF

TOP VIEW

D6CS

DACEN

D2D1

REN

CLK

QSOP

MAX5181

MAX5184

19-1579; Rev 5; 8/10

Pin Configurations

Ordering Information

MAX5181/MAX5184

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.

PART TEMP RANGE PIN-PACKAGE

MAX5181BEEG+ -40°C to +85°C 24 QSOP

MAX5184BEEG+ -40°C to +85°C 24 QSOP

MAX5184ETG+ -40°C to +85°C 24 TQFN-EP*

MAX5184ETG/V+ -40°C to +85°C 24 TQFN-EP*

EP = Exposed pad.

Denotes a lead(Pb)-free/RoHS-compliant package.

/V denotes an automotive qualified part.

Pin Configurations continued at end of data sheet.

Summary of content (16 pages)

PAGE 1
9-1579; Rev 5; 8/10 10-Bit, 40MHz, Current/Voltage-Output DACs The MAX5181 is a 10-bit, current-output digital-to-analog converter (DAC) designed for superior performance in signal reconstruction or arbitrary waveform generation applications requiring analog signal reconstruction with low distortion and low-power operation. The MAX5184 provides equal specifications, with on-chip precision resistors for voltage-output operation.
PAGE 2
MAX5181/MAX5184 10-Bit, 40MHz, Current/Voltage-Output DACs ABSOLUTE MAXIMUM RATINGS AVDD, DVDD to AGND, DGND .................................-0.3V to +6V Digital Inputs to DGND.............................................-0.3V to +6V OUTP, OUTN, CREF to AGND .................................-0.3V to +6V VREF to AGND ..........................................................-0.3V to +6V AGND to DGND.....................................................-0.3V to +0.3V AVDD to DVDD ............................
PAGE 3
10-Bit, 40MHz, Current/Voltage-Output DACs (AVDD = DVDD = 3V, VAGND = VDGND = 0V, fCLK = 40MHz, IFS = 1mA, 400Ω differential output, CL = 5pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS Full-Scale Output Current IFS MAX5181 only DAC External Output Resistor load RL MAX5181 only MIN TYP MAX UNITS 0.5 1 1.5 mA Ω 400 REFERENCE Output Voltage Range VREF 1.12 1.2 1.
PAGE 4
Typical Operating Characteristics (AVDD = DVDD = 3V, VAGND = VDGND = 0V, IFS = 1mA, 400Ω differential output, CL = 5pF, TA = +25°C, unless otherwise noted.) 0.2 DNL (LSB) 0.2 0.1 2.5 2.0 MAX5184 1.5 MAX5181 -0.2 -0.1 -0.2 1.0 -0.3 0 128 256 384 512 640 768 896 1024 128 256 384 512 640 768 896 1024 2.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) ANALOG SUPPLY CURRENT vs. TEMPERATURE DIGITAL SUPPLY CURRENT vs. SUPPLY VOLTAGE DIGITAL SUPPLY CURRENT vs. TEMPERATURE MAX5184 1.
PAGE 5
10-Bit, 40MHz, Current/Voltage-Output DACs INTERNAL REFERENCE VOLTAGE vs. SUPPLY VOLTAGE MAX5181 0.07 MAX5184 1.26 MAX5184 1.25 MAX5181 1.24 0.05 -40 -15 10 35 60 1.26 MAX5181 1.25 MAX5184 1.23 2.5 85 1.27 1.24 1.23 0.03 3.0 3.5 4.0 4.5 5.0 -40 5.5 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) OUTPUT CURRENT vs.
PAGE 6
Typical Operating Characteristics (continued) (AVDD = DVDD = 3V, VAGND = VDGND = 0V, IFS = 1mA, 400Ω differential output, CL = 5pF, TA = +25°C, unless otherwise noted.) SIGNAL-TO-NOISE PLUS DISTORTION vs. OUTPUT FREQUENCY SPURIOUS-FREE DYNAMIC RANGE vs. OUTPUT FREQUENCY AND CLOCK FREQUENCY fCLK = 40MHz 76 62.4 MAX5181/4toc20 fCLK = 20MHz fCLK = 50MHz MAX5181/4toc19 78 62.2 62.0 72 fCLK = 10MHz SIINAD (dB) SFDR (dBc) 74 fCLK = 60MHz 61.8 61.6 61.4 70 61.2 68 61.0 fCLK = 30MHz 60.
PAGE 7
10-Bit, 40MHz, Current/Voltage-Output DACs PIN QSOP TQFN NAME FUNCTION 1 22 CREF REFO 2 23 OUTP Positive Analog Output. Current output for MAX5181; voltage output for MAX5184. 3 24 OUTN Negative Analog Output. Current output for MAX5181; voltage output for MAX5184. 4 1 AGND Analog Ground 5 2 AVDD Analog Positive Supply, 2.7V to 3.
PAGE 8
MAX5181/MAX5184 10-Bit, 40MHz, Current/Voltage-Output DACs Detailed Description provides a 1.2V output. Due to its limited 10µA output drive capability, REFO must be buffered with an external amplifier, if heavier loading is required. The MAX5181/MAX5184 also employ a control amplifier designed to regulate simultaneously the full-scale output current (IFS) for both outputs of the devices.
PAGE 9
10-Bit, 40MHz, Current/Voltage-Output DACs External Reference To disable the MAX5181/MAX5184’s internal reference, connect REN to DVDD. A temperature-stable, external reference may now be applied to drive the REFO pin to set the full-scale output (Figure 3). Choose a reference capable of supplying at least 150µA to drive the bias circuit that generates the cascode current for the current array. For improved accuracy and drift performance, choose a fixed output voltage reference such as the 1.
PAGE 10
MAX5181/MAX5184 10-Bit, 40MHz, Current/Voltage-Output DACs Table 1. Power-Down Mode Selection PD (POWER-DOWN SELECT) DACEN (DAC ENABLE) POWER-DOWN MODE 0 0 Standby 0 1 Wake-Up 1 X Shutdown OUTPUT STATE MAX5181 High-Z MAX5184 AGND Last state prior to standby mode MAX5181 High-Z MAX5184 AGND X = Don’t care. DVDD 10μF 0.1μF DGND REN 1.2V BANDGAP REFERENCE AVDD EXTERNAL 1.2V REFERENCE REFO CURRENTSOURCE ARRAY REFR IFS MAX6520 AGND RSET 9.6kΩ* AGND MAX5181 MAX5184 *9.
PAGE 11
10-Bit, 40MHz, Current/Voltage-Output DACs tCL MAX5181/MAX5184 tCLK tCH CLK D0–D9 N-1 N tDS OUT N+1 tDH N-1 N N+1 Figure 4. Timing Diagram Offset Error Offset error (Figure 5c) is the difference between the ideal and the actual offset point. For a DAC, the offset point is the step value when the digital input is zero. This error affects all codes by the same amount and can usually be compensated by trimming.
PAGE 12
7 6 ANALOG OUTPUT VALUE ANALOG OUTPUT VALUE 6 5 4 AT STEP 011 (1/2 LSB ) 3 2 AT STEP 001 (1/4 LSB ) 1 1 LSB 5 DIFFERENTIAL LINEARITY ERROR (-1/4 LSB) 4 3 1 LSB 2 DIFFERENTIAL LINEARITY ERROR (+1/4 LSB) 1 0 0 000 001 010 011 100 101 110 000 111 001 Figure 5a. Integral Nonlinearity IDEAL OFFSET POINT 0 000 001 OFFSET ERROR (+1 1/4 LSB) ANALOG OUTPUT VALUE IDEAL DIAGRAM 1 100 101 IDEAL FULL-SCALE OUTPUT 7 2 ACTUAL OFFSET POINT 011 Figure 5b.
PAGE 13
10-Bit, 40MHz, Current/Voltage-Output DACs MAX5181/MAX5184 +3V AVDD + +3V 0.1μF 10μF + 10μF 0.1μF 0.1μF 402Ω DVDD AVDD CREF +5V 402Ω OUTP CLK OUTPUT 400Ω* D0–D9 MAX5181 MAX5184 402Ω -5V MAX4108 OUTN REFO 402Ω 0.1μF 400Ω* REFR RSET** DGND REN AGND **MAX5181 ONLY *400Ω RESISTORS INTERNAL TO MAX5184 ONLY. Figure 6.
PAGE 14
MAX5181/MAX5184 10-Bit, 40MHz, Current/Voltage-Output DACs DVDD AVDD COUNTER ADR WAVEFORM MEMORY (RAM) LOWPASS RECONSTRUCTION FILTER DATA 10 CLOCK GENERATOR MAX5181 MAX5184 400Ω* VARIABLE fc 9.6kΩ* FILTERED WAVEFORM (ANALOG OUTPUT) *MAX5181 ONLY Figure 8a.
PAGE 15
10-Bit, 40MHz, Current/Voltage-Output DACs as close to the pin as possible, and their opposite ends should be as close as possible to the ground plane. The DVDD pins should also have separate 10µF and 0.1µF capacitors adjacent to their respective pins. Try to minimize analog load capacitance for proper operation. For best performance, bypass with low-ESR 0.1µF capacitors to AVDD.
PAGE 16
MAX5181/MAX5184 10-Bit, 40MHz, Current/Voltage-Output DACs Revision History REVISION NUMBER REVISION DATE 4 4/03 — — 5 8/10 Added lead-free and automotive qualified parts to Ordering Information 1 DESCRIPTION PAGES CHANGED 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.