Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) QSOP 28

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General Description

The MAX5180 contains two 10-bit, simultaneous-

update, current-output digital-to-analog converters

(DACs) designed for superior performance in communi-

cations systems requiring analog signal reconstruction

with low distortion and low-power operation. The

MAX5183 provides equal specifications, with on-chip

precision resistors for voltage output operation. The

devices are designed for 10pVs glitch operation to min-

imize unwanted spurious signal components at the out-

put. An on-board 1.2V bandgap circuit provides a

well-regulated, low-noise reference that can be dis-

abled for external reference operation.

The MAX5180/MAX5183 are designed to provide a high

level of signal integrity for the least amount of power dis-

sipation. The DACs operate from a single supply of 2.7V

to 3.3V. Additionally, these DACs have three modes of

operation: normal, low-power standby, and complete

shutdown, which provides the lowest possible power dis-

sipation with 1µA (max) shutdown current. A fast wake-

up time (0.5µs) from standby mode to full DAC operation

conserves power by activating the DACs only when

required.

The MAX5180/MAX5183 are packaged in a 28-pin QSOP

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

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

versions, refer to the MAX5186/MAX5189 data sheet.

Applications

Signal Reconstruction of I and Q Transmit

Signals

Digital Signal Processing

Arbitrary Waveform Generation (AWG)

Imaging

Features

♦ 2.7V to 3.3V Single-Supply Operation

♦ Wide Spurious-Free Dynamic Range: 70dB

at f

OUT

= 2.2MHz

♦ Fully Differential Outputs for Each DAC

♦ ±0.5% FSR Gain Mismatch

♦ ±0.2° Phase Mismatch

♦ Low-Current Standby or Full-Shutdown Modes

♦ Internal 1.2V Low-Noise Bandgap Reference

♦ Small 28-Pin QSOP Package

MAX5180/MAX5183

Dual, 10-Bit, 40MHz, Current/Voltage

Simultaneous-Output DACs

________________________________________________________________ Maxim Integrated Products 1

CREF2

OUT2P

OUT2N

REFO

REFR

DGND

REN

N.C.

CLK

DACEN

AGND

OUT1N

OUT1P

CREF1

QSOP

TOP VIEW

MAX5180

MAX5183

19-1577; Rev 4; 12/03

PART

MAX5180BEEI

-40°C to +85°C

TEMP RANGE PIN-PACKAGE

28 QSOP

Pin Configuration

Ordering Information

MAX5183BEEI

-40°C to +85°C 28 QSOP

Summary of content (14 pages)

PAGE 1
9-1577; Rev 4; 12/03 Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs The MAX5180 contains two 10-bit, simultaneousupdate, current-output digital-to-analog converters (DACs) designed for superior performance in communications systems requiring analog signal reconstruction with low distortion and low-power operation. The MAX5183 provides equal specifications, with on-chip precision resistors for voltage output operation.
PAGE 2
MAX5180/MAX5183 Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs ABSOLUTE MAXIMUM RATINGS AVDD, DVDD to AGND, DGND .................................-0.3V to +6V Digital Inputs to DGND.............................................-0.3V to +6V OUT1P, OUT1N, OUT2P, OUT2N, CREF1, CREF2 to AGND ...................................................-0.3V to +6V VREF to AGND ..........................................................-0.3V to +6V AGND to DGND................................................
PAGE 3
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs (AVDD = DVDD = 3V ±10%, AGND = DGND = 0, 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 MIN TYP MAX UNITS 1.12 1.2 1.
PAGE 4
Typical Operating Characteristics (AVDD = DVDD = 3V, AGND = DGND = 0, 400Ω differential output, IFS = 1mA, CL = 5pF, TA = +25°C, unless otherwise noted.) DIFFERENTIAL NONLINEARITY vs. INPUT CODE 0.3 0.4 0.2 DNL (LSB) 0.2 0.1 0 -0.1 0 -0.2 -0.3 0 128 256 384 512 640 768 896 1024 MAX5180 2.51 2.49 2.45 0 128 256 384 512 640 768 896 1024 2.5 3.0 3.5 4.0 4.5 5.0 DIGITAL INPUT CODE DIGITAL INPUT CODE SUPPLY VOLTAGE (V) ANALOG SUPPLY CURRENT vs. TEMPERATURE DIGITAL SUPPLY CURRENT vs.
PAGE 5
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE MAX5180 1.25 1.27 MAX5183 1.26 MAX5183 1.25 MAX5180 1.23 1.23 2.5 3.0 3.5 4.0 4.5 5.
PAGE 6
Typical Operating Characteristics (continued) (AVDD = DVDD = 3V, AGND = DGND = 0, 400Ω differential output, IFS = 1mA, CL = 5pF, TA = +25°C, unless otherwise noted.) 78 fCLK = 60MHz 76 fCLK = 40MHz 72 fCLK = 10MHz 70 fCLK = 50MHz fCLK = 10MHz 68 61.5 DAC2 61.0 DAC1 fCLK = 60MHz 60.5 68 fCLK = 30MHz fCLK = 30MHz 60.
PAGE 7
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs PIN NAME FUNCTION 1 CREF1 Reference Bias Bypass, DAC1 2 OUT1P Positive Analog Output, DAC1. Current output for MAX5180; voltage output for MAX5183. 3 OUT1N Negative Analog Output, DAC1. Current output for MAX5180; voltage output for MAX5183. 4 AGND Analog Ground 5 AVDD Analog Positive Supply, 2.7V to 3.
PAGE 8
MAX5180/MAX5183 Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs REN AVDD AGND CS DACEN PD 1.2V REF REFO CREF1 CURRENTSOURCE ARRAY REFR CREF2 OUT1P *9.6k OUT1N DAC 1 SWITCHES OUT2P DAC 2 SWITCHES MSB DECODE CLK MSB DECODE INPUT LATCHES INPUT LATCHES MAX5180 MAX5183 DVDD *INTERNAL 400Ω AND 9.6kΩ RESISTORS FOR MAX5183 ONLY. 400Ω* 400Ω* 400Ω * 400Ω* OUTPUT LATCHES OUTPUT LATCHES OUT2N DGND D9–D0 Figure 1.
PAGE 9
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs MAX5180/MAX5183 OPTIONAL EXTERNAL BUFFER FOR HEAVIER LOADS REN AGND +1.2V BANDGAP REFERENCE MAX4040 REFO CCOMP* REFR CURRENTSOURCE ARRAY IREF IFS AGND IREF = VREF RSET RSET RSET ** 9.6k MAX5180 MAX5183 AGND *COMPENSATION CAPACITOR (CCOMP ≈ 100nF). **9.6kΩ REFERENCE CURRENT-SET RESISTOR INTERNAL TO MAX5183 ONLY. USE EXTERNAL RSET FOR MAX5180. Figure 2. Setting IFS with the Internal 1.
PAGE 10
MAX5180/MAX5183 Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs External Reference MAX5180 and MAX5183 typically require 50µs to wake up and allow both the outputs and the reference to settle. To disable the MAX5180/MAX5183’s internal reference, connect REN to AVDD. A temperature-stable, external reference may now be applied to drive the REFO pin to set the full-scale output (Figure 3).
PAGE 11
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs Outputs The MAX5180 outputs are designed to supply full-scale output currents of 1mA into 400Ω loads in parallel with a capacitive load of 5pF. The MAX5183 features integrated 400Ω resistors that restore the array currents to proportional, differential voltages of 400mV.
PAGE 12
MAX5180/MAX5183 Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs AVDD AVDD 3V 10µF 3V 0.1µF 0.1µF 10µF 0.1µF 0.1µF AVDD 402Ω DVDD CREF1 CREF2 5V 402Ω OUT1P CLK OUTPUT1 400Ω* MAX4108 MAX5180 MAX5183 D0–D9 -5V OUT1N 402Ω 402Ω 400Ω* 402Ω REFO 402Ω 0.1µF 5V OUT2P OUTPUT2 400Ω* REFR MAX4108 -5V RSET** OUT2N 402Ω 402Ω 400Ω* DGND REN AGND *400Ω RESISTORS INTERNAL TO MAX5183 ONLY. **MAX5180 ONLY Figure 5.
PAGE 13
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs MAX5180/MAX5183 3V 3V 3V DAC1 DIGITAL SIGNAL PROCESSOR I COMPONENT BP FILTER CARRIER FREQUENCY MAX5180 MAX5183 Q COMPONENT DAC2 0° 90° Σ IF BP FILTER MAX2452 QUADRATURE MODULATOR Figure 6. Using the MAX5180/MAX5183 for I/Q Signal Reconstruction grounding and power-supply decoupling guidelines for high-speed, high-frequency applications should be closely followed.
PAGE 14
Dual, 10-Bit, 40MHz, Current/Voltage Simultaneous-Output DACs QSOP.EPS MAX5180/MAX5183 Package Information 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.