Datasheet

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

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General Description

The MAX5187 is an 8-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 volt-

age-output MAX5190 provides equal specifications,

with on-chip precision resistors for voltage output oper-

ation. Both devices 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 MAX5187/MAX5190 are designed to provide a high

level of signal integrity for the least amount of power

dissipation. They operate from a single supply of +2.7V

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

operation: normal, low-power standby, and full shut-

down, which provides the lowest possible power dissi-

pation with a 1µA (max) shutdown current. A fast

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

operation allows for power conservation by activating

the DAC only when required.

The MAX5187/MAX5190 are packaged in a 24-pin

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

+85°C) temperature range. For higher resolution, 10-bit

versions, see the MAX5181/MAX5184 data sheet.

Applications

Signal Reconstruction

Digital Signal Processing

Arbitrary Waveform Generation (AWG)

Imaging Applications

Features

♦ +2.7V to +3.3V Single-Supply Operation

♦ Wide Spurious-Free Dynamic Range:

70dB at f

OUT

= 2.2MHz

♦ Fully Differential Output

♦ Low-Current Standby or Full Shutdown Modes

♦ Internal +1.2V Low-Noise Bandgap Reference

♦ Small 24-Pin QSOP Package

MAX5187/MAX5190

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

________________________________________________________________ Maxim Integrated Products 1

REFO

REFR

DGND

D0DGND

DGND

REN

CLK

DACEN

AGND

OUTN

OUTP

CREF

QSOP

TOP VIEW

MAX5187

MAX5190

19-1582; Rev 2; 12/01

PART

MAX5187BEEG

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

24 QSOP

Pin Configuration

Ordering Information

MAX5190BEEG

-40°C to +85°C 24 QSOP

Summary of content (15 pages)

PAGE 1
9-1582; Rev 2; 12/01 8-Bit, 40MHz, Current/Voltage-Output DACs The MAX5187/MAX5190 are designed to provide a high level of signal integrity for the least amount of power dissipation. They operate from a single supply of +2.7V to +3.3V. Additionally, these DACs have three modes of operation: 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.
PAGE 2
MAX5187/MAX5190 8-Bit, 40MHz, Current/Voltage-Output DACs ABSOLUTE MAXIMUM RATINGS AVDD, DVDD to AGND, DGND .................................-0.3V to +6V Digital Input 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
8-Bit, 40MHz, Current/Voltage-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 1.28 V REFERENCE Output Voltage Range VREF Output Voltage Temperature Drift TCVREF 50 ppm/°C Reference Output Drive Capability IREFOUT 10 µA Reference Supply Rejection Current Gain (IFS / IREF) 0.
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 0.075 0.100 0.050 DNL (LSB) 0.050 0.025 0 0.025 -0.025 0 -0.050 MAX5190 1.5 MAX5187 96 0 128 160 192 224 256 32 64 128 160 192 224 256 2.5 2.0 MAX5190 MAX5187 10 35 60 7 MAX5190 6 MAX5187 5 4 3.25 3.0 3.5 4.0 4.5 5.0 5.5 -40 -15 10 35 60 STANDBY CURRENT vs.
PAGE 5
8-Bit, 40MHz, Current/Voltage-Output DACs SHUTDOWN CURRENT vs. TEMPERATURE MAX5190 0.07 MAX5187 1.27 1.26 MAX5190 1.25 MAX5187 -15 10 35 60 85 1.26 MAX5187 1.25 MAX5190 1.23 1.23 2.5 3.0 3.5 4.0 4.5 5.0 -40 5.5 -15 10 35 60 TEMPERATURE (°C) SUPPLY VOLTAGE (V) TEMPERATURE (°C) OUTPUT CURRENT vs. REFERENCE CURRENT DYNAMIC RESPONSE RISE TIME DYNAMIC RESPONSE FALL TIME 85 MAX5187/90-15 MAX5187/90-13 4 MAX5187/90-14 -40 1.27 1.24 1.24 0.
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.) SPURIOUS-FREE DYNAMIC RANGE vs. CLOCK FREQUENCY SPURIOUS-FREE DYNAMIC RANGE vs. OUTPUT FREQUENCY AND CLOCK FREQUENCY 76 62.4 MAX5187/90-20 90 fOUT = 50MHz fOUT = 20MHz fOUT = 40MHz SIGNAL-TO-NOISE PLUS DISTORTION vs. OUTPUT FREQUENCY MAX5187/90-19 78 MAX5187/90-18 100 62.2 62.
PAGE 7
8-Bit, 40MHz, Current/Voltage-Output DACs PIN NAME FUNCTION 1 CREF Reference Bias Bypass 2 OUTP Positive Analog Output. Current output for MAX5187; voltage output for MAX5190. 3 OUTN Negative Analog Output. Current output for MAX5187; voltage output for MAX5190. 4 AGND Analog Ground 5 AVDD Analog Positive Supply, +2.7V to +3.
PAGE 8
MAX5187/MAX5190 8-Bit, 40MHz, Current/Voltage-Output DACs REN AVDD AGND CS DACEN PD 1.2V REF REFO CREF CURRENTSOURCE ARRAY REFR OUTP 9.6k* DAC SWITCHES OUTN OUTPUT LATCHES OUTPUT LATCHES MSB DECODE CLK 400Ω * MSB DECODE INPUT LATCHES INPUT LATCHES MAX5187 MAX5190 DVDD *INTERNAL 400Ω AND 9.6kΩ RESISTORS FOR MAX5190 ONLY. 400Ω* DGND D7–D0 Figure 1. Functional Diagram Detailed Description The MAX5187/MAX5190 are 8-bit DACs capable of operating with clock speeds up to 40MHz.
PAGE 9
8-Bit, 40MHz, Current/Voltage-Output DACs MAX5187/MAX5190 OPTIONAL EXTERNAL BUFFER FOR HEAVIER LOADS DGND REN +1.2V BANDGAP REFERENCE MAX4040 REFO CCOMP* AGND REFR VREF IREF = CURRENTSOURCE ARRAY IREF RSET RSET IFS RSET** 9.6kΩ MAX5187 MAX5190 AGND *COMPENSATION CAPACITOR (CCOMP = 100nF) **9.6kΩ REFERENCE CURRENT SET RESISTOR INTERNAL TO MAX5190 ONLY. USE EXTERNAL RSET FOR MAX5188. Figure 2. Setting IFS with the Internal +1.2V Reference and the Control Amplifier DVDD 10µF 0.
PAGE 10
MAX5187/MAX5190 8-Bit, 40MHz, Current/Voltage-Output DACs External Reference Shutdown Mode To disable the MAX5187/MAX5190’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 that can supply at least 150µA to drive the bias circuit that generates the cascode current for the current array.
PAGE 11
8-Bit, 40MHz, Current/Voltage-Output DACs Applications Information Static and Dynamic Performance Definitions Integral Nonlinearity Integral nonlinearity (INL) (Figure 5a) is the deviation of the values on an actual transfer function from either a best-straight-line fit (closest approximation to the actual transfer curve) or a line drawn between the endpoints of the transfer function once offset and gain errors have been nullified. For a DAC, the deviations are measured every single step.
PAGE 12
MAX5187/MAX5190 8-Bit, 40MHz, Current/Voltage-Output DACs +3V AVDD +3V 10µF 0.1µF 0.1µF 10µF 0.1µF 402Ω AVDD DVDD CREF 402Ω +5V OUTP CLK OUTPUT 400Ω* D0–D7 MAX5187 MAX5190 402Ω REFO MAX4108 -5V OUTN 402Ω 0.1µF 400Ω* REFR RSET** DGND REN AGND *400Ω RESISTORS INTERNAL TO MAX5190 ONLY. **MAX5187 ONLY Figure 6.
PAGE 13
8-Bit, 40MHz, Current/Voltage-Output DACs MAX5187/MAX5190 AVDD +3V DVDD +3V I COMPONENT 8 DIGITAL SIGNAL PROCESSOR BP FILTER MAX5187 MAX5190 AVDD CARRIER FREQUENCY DVDD Q COMPONENT 8 MAX5187 MAX5190 0° 90° Σ IF BP FILTER MAX2452 QUADRATURE MODULATOR Figure 7.
PAGE 14
MAX5187/MAX5190 8-Bit, 40MHz, Current/Voltage-Output DACs AVDD COUNTER WAVEFORM MEMORY (RAM) ADR CLOCK GENERATOR DVDD LOWPASS RECONSTRUCTION FILTER 8 MAX5187 MAX5190 400Ω* VARIABLE fC 9.6k* FILTERED WAVEFORM (ANALOG OUTPUT) *MAX5187 ONLY Figure 8a.
PAGE 15
8-Bit, 40MHz, Current/Voltage-Output DACs QSOP.EPS 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.