Datasheet

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

General Description

The MAX5186 contains two 8-bit, simultaneous-update,

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 MAX5189 pro-

vides equal specifications, with on-chip precision resis-

tors for voltage output operation. The MAX5186/

MAX5189 are designed for a 10pV-s glitch operation to

minimize unwanted spurious signal components at the

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

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

abled for external reference operation.

The MAX5186/MAX5189 are designed to provide a high

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

pation. Both DACs operate from a single supply voltage

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 dissipation with a 1µA (max) shutdown current. A

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

operation allows power conservation by activating the

DACs only when required.

The MAX5186/MAX5189 are packaged in a 28-pin

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

+85°C) temperature range. For higher resolution, dual

10-bit versions, refer to the MAX5180/MAX5183 data

sheet.

Applications

Signal Reconstruction of I and Q

Transmit Signals

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 Outputs for Each DAC

♦ ±0.5% FSR Gain Mismatch at f

OUT

= 2.2MHz

♦ ±0.15° Phase Mismatch at f

OUT

= 2.2MHz

♦ Low-Current Standby or Full Shutdown Modes

♦ Internal 1.2V, Low-Noise Bandgap Reference

♦ Small 28-Pin QSOP Package

MAX5186/MAX5189

Dual, 8-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

MAX5186

MAX5189

19-1581; Rev 4; 5/03

Pin Configuration

Ordering Information

PART

MAX5186BEEI

MAX5189BEEI

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

28 QSOP

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.

Summary of content (14 pages)

PAGE 1
9-1581; Rev 4; 5/03 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs The MAX5186/MAX5189 are designed to provide a high level of signal integrity for the least amount of power dissipation. Both DACs operate from a single supply voltage 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 dissipation with a 1µA (max) shutdown current. A fast wake-up time (0.
PAGE 2
MAX5186/MAX5189 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs ABSOLUTE MAXIMUM RATINGS AVDD, DVDD to AGND, DGND ................................ -0.3V to +6V Digital Input to DGND.............................................. -0.3V to +6V OUT1P, OUT1N, OUT2P, OUT2N, CREF1, CREF2 to AGND .................................................. -0.3V to +6V REF0, REFR to AGND.............................................. -0.3V to +6V AGND to DGND...................................................
PAGE 3
Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs (AVDD = DVDD = 3V, AGND = DGND = 0, fCLK = 40MHz, IFS = 1mA, 400Ω differential output, CL = 5pF, TA = TMIN to TMAX, unless otherwise noted. ≥ +25°C guaranteed by production test, < +25°C guaranteed by design and characterization. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ANALOG OUTPUT Differential Full-Scale Output Voltage VFS 400 Voltage Compliance Range Output Leakage Current mV -0.3 0.
PAGE 4
ELECTRICAL CHARACTERISTICS (continued) (AVDD = DVDD = 3V, AGND = DGND = 0, fCLK = 40MHz, IFS = 1mA, 400Ω differential output, CL = 5pF, TA = TMIN to TMAX, unless otherwise noted. ≥ +25°C guaranteed by production test, < +25°C guaranteed by design and characterization. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CS Fall to CLK Rise Time 5 ns CS Fall to CLK Fall Time 5 ns DACEN Rise Time to VOUT 0.
PAGE 5
Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs 590 590 580 MAX5189 570 MAX5186 580 570 MAX5189 560 550 560 3.0 3.5 4.0 4.5 5.0 5.5 0.70 MAX5189 0.65 MAX5186 0.60 0.55 0.50 0.45 540 -40 -15 10 35 60 2.5 85 3.0 4.0 3.5 4.5 5.0 SUPPLY VOLTAGE (V) TEMPERATURE (°C) SUPPLY VOLTAGE (V) INTERNAL REFERENCE VOLTAGE vs. SUPPLY VOLTAGE INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE OUTPUT CURRENT vs. REFERENCE CURRENT 1.26 MAX5189 1.25 MAX5186 1.24 1.
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.
PAGE 7
Dual, 8-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 MAX5186; voltage output for MAX5189. 3 OUT1N Negative Analog Output, DAC1. Current output for MAX5186; voltage output for MAX5189. 4 AGND Analog Ground 5 AVDD Analog Positive Supply, 2.7V to 3.3V 6 DACEN 7 PD Power-Down Select 0: Enter DAC standby mode (DACEN = DGND) or power-up DAC (DACEN = DVDD).
PAGE 8
MAX5186/MAX5189 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs Detailed Description The MAX5186/MAX5189 are dual, 8-bit digital-to-analog converters (DACs) capable of operating with clock speeds up to 40MHz. Each of these dual converters consists of separate input and DAC registers, followed by a current source array capable of generating up to 1.5mA full-scale output current (Figure 1). An integrated 1.
PAGE 9
Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs AVDD AGND CS DACEN MAX5186/MAX5189 REN PD 1.2V REF REFO CREF1 CURRENTSOURCE ARRAY CREF2 REFR OUT1P OUT1N OUT2N OUT2N DAC1 SWITCHES 9.6kΩ* DAC2 SWITCHES OUTPUT LATCHES OUTPUT LATCHES MSB DECODE CLK 400Ω* MSB DECODE INPUT LATCHES INPUT LATCHES MAX5186 MAX5189 DVDD *INTERNAL 400Ω AND 9.6kΩ RESISTORS FOR MAX5189 ONLY. 400Ω* 400Ω* 400Ω* DGND D7–D0 Figure 1.
PAGE 10
MAX5186/MAX5189 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs OPTIONAL EXTERNAL BUFFER FOR HEAVIER LOADS REN DGND 1.2V BANDGAP REFERENCE MAX4040 REFO CCOMP* REFR CURRENTSOURCE ARRAY IREF AGND RSET** 9.6kΩ RSET MAX5186 MAX5189 AGND IREF = VREF RSET *COMPENSATION CAPACITOR (CCOMP = 100nF) **9.6kΩ REFERENCE CURRENT-SET RESISTOR INTERNAL TO MAX5189 ONLY. USE EXTERNAL RSET FOR MAX5186. Figure 2. Setting IFS with the Internal 1.2V Reference and the Control Amplifier DVDD 10µF 0.
PAGE 11
Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs MAX5186/MAX5189 Table 1.
PAGE 12
MAX5186/MAX5189 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs Differential to Single-Ended Conversion signal is both amplitude and phase modulated, created by summing two independently modulated carriers of identical frequency but different phase (90° phase difference). The MAX4108 low-distortion, high-input bandwidth amplifier may be used to generate a voltage from the array current output of the MAX5186.
PAGE 13
Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs 3V 3V I COMPONENT DAC1 DIGITAL SIGNAL PROCESSOR MAX5186/MAX5189 3V BP FILTER CARRIER FREQUENCY MAX5186 MAX5189 Q COMPONENT DAC2 0° 90° Σ IF BP FILTER MAX2452 QUADRATURE MODULATOR Figure 6. Using the MAX5186/MAX5189 for I/Q Signal Reconstruction Grounding and Power-Supply Decoupling Grounding and power-supply decoupling strongly influence the MAX5186/MAX5189’s performance.
PAGE 14
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) QSOP.EPS MAX5186/MAX5189 Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.