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MAX1191ETI+;MAX1191ETI+T;中文规格书,Datasheet资料

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19-2836; Rev 1; 9/03

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC

General Description

Features

The MAX1191 is an ultra-low-power, dual, 8-bit,7.5Msps analog-to-digital converter (ADC). The deviceoUltra-Low Power

features two fully differential wideband track-and-hold12mW (Normal Operation: 7.5Msps)(T/H) inputs. These inputs have a 440MHz bandwidth0.3µW (Shutdown Mode)

and accept fully differential or single-ended signals.oExcellent Dynamic Performance

The MAX1191 delivers a typical signal-to-noise and dis-48.7dB SNR at fIN= 1.875MHztortion (SINAD) of 48.6dB at an input frequency of69dBc SFDR at f1.875MHz and a sampling rate of 7.5Msps while con-IN= 1.875MHzsuming only 12mW. This ADC operates from a 2.7V too2.7V to 3.6V Single Analog Supply

3.6V analog power supply. A separate 1.8V to 3.6Vo1.8V to 3.6V TTL/CMOS-Compatible Digitalsupply powers the digital output driver. In addition toOutputs

ultra-low operating power, the MAX1191 features threepower-down modes to conserve power during idle peri-oFully Differential or Single-Ended Analog Inputsods. Excellent dynamic performance, ultra-low power,oInternal/External Reference Option

and small size make the MAX1191 ideal for applica-tions in imaging, instrumentation, and digital communi-oMultiplexed CMOS-Compatible Tri-State Outputscations.

o28-Pin Thin QFN Package

An internal 1.024V precision bandgap reference setsoEvaluation Kit Available (Order MAX1193EVKIT)

the full-scale range of the ADC to ±0.512V. A flexiblereference structure allows the MAX1191 to use its inter-Ordering Informationnal reference or accept an externally applied referencefor applications requiring increased accuracy.

PARTTEMP RANGEPIN-PACKAGEThe MAX1191 features parallel, multiplexed, CMOS-compatible tri-state outputs. The digital output format isMAX1191ETI-T-40°C to +85°C28 Thin QFN-EP*(5mm x 5mm)offset binary. A separate digital power input accepts a*EP = Exposed paddle.

voltage from 1.8V to 3.6V for flexible interfacing to dif-ferent logic levels. The MAX1191 is available in a 5mm×the extended industrial (-40°C to +85°C) temperature5mm, 28-pin thin QFN package, and is specified forPin Configurationrange.

For higher sampling frequency applications, refer to theTOP VIEWMAX1195–MAX1198 dual 8-bit ADCs. Pin-compatibleDPNNIFFMF01DEEOEDDversions of the MAX1191 are also available. Refer to theVRRCRPPMAX1192 data sheet for 22Msps, and the MAX119387654322222222data sheet for 45Msps.

Applications

INA-121D0INA+220D1Ultrasound and Medical ImagingIQ Baseband Sampling

GND319D2Battery-Powered Portable InstrumentsCLK4MAX119118D3Low-Power Video

GND517A/BWLAN, Mobile DSL, WLL Receiver

INB+616D4INB-7EXPOSED PADDLE15D50123411111DD7DDDDD6DVVNNDDGGVOO5mm x 5mm THIN QFN________________________________________________________________Maxim Integrated Products

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-42, or visit Maxim’s website at www.maxim-ic.com.

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MAX1191Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADCMAX1191ABSOLUTE MAXIMUM RATINGS

VDD, OVDDto GND...............................................-0.3V to +3.6VOGND to GND.......................................................-0.3V to +0.3VINA+, INA-, INB+, INB- to GND.................-0.3V to (VDD+ 0.3V)CLK, REFIN, REFP, REFN, COM to GND...-0.3V to (VDD+ 0.3V)PD0, PD1 to OGND.................................-0.3V to (OVDD+ 0.3V)Digital Outputs to OGND.........................-0.3V to (OVDD+ 0.3V)Continuous Power Dissipation (TA= +70°C)

28-Pin Thin QFN (derated 20.8mW/°Cabove +70°C)...1667mW

Operating Temperature Range...........................-40°C to +85°CJunction Temperature......................................................+150°CStorage Temperature Range.............................-65°C to +150°CLead Temperature (soldering, 10s).................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, fCLK= 7.5MHz, CREFP= CREFN= CCOM= 0.33µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)PARAMETERDC ACCURACYResolutionIntegral NonlinearityDifferential NonlinearityOffset ErrorGain ErrorDC Gain MatchingGain Temperature CoefficientPower-Supply RejectionANALOG INPUTDifferential Input Voltage RangeCommon-Mode Input VoltageRangeInput ResistanceInput CapacitanceCONVERSION RATEMaximum Clock FrequencyData LatencyfCLKChannel AChannel BfIN = 1.875MHzfIN = 3.75MHzfIN = 1.875MHzfIN = 3.7547477.55.05.548.748.8.8.5MHzClockcyclesVDIFFVCOMRINCINSwitched capacitor loadDifferential or single-ended inputs±0.512VDD / 27205VVkΩpFOffset (VDD ±5%)Gain (VDD ±5%)INLDNLNo missing codes over temperature≥+25°C<+25°CExcludes REFP - REFN error±0.01±30±0.2±0.058±0.15±0.13±1.00±1.00±4±6±2±0.2BitsLSBLSB%FS%FSdBppm/°CLSBSYMBOLCONDITIONSMINTYPMAXUNITSDYNAMIC CHARACTERISTICS (differential inputs, 4096 point FFT)Signal-to-Noise Ratio(Note 2)Signal-to-Noise and Distortion(Note 2)SNRSINADdBdB2_______________________________________________________________________________________

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Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, fCLK= 7.5MHz, CREFP= C= 0.33µF, T°C, unless otherwise noted. Typical values are at TREFN= CCOMA = -40°C to +85A= +25°C.) (Note 1)PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSSpurious-Free Dynamic RangefIN = 1.875MHz5969(Note 2)SFDRfIN = 3.75MHz68.7dBcThi rd - H a r mo ni c D is tor ti on72.0( No te 2) HD3fIN = 1.875MHzfIN = 3.75MHz-70.0dBcIntermodulation DistortionIMDfIN1 = 1MHz at -7dB FS, fIN2 = 1.01MHzat -7dB FS-66dBcThird-Order IntermodulationIM3fIN1 = 1MHz at -7dB FS, fIN2 = 1.01MHzat -7dB FS-70dBcTotal Harmonic DistortionfIN = 1.875MHz-68.0-57.0(Note 2)THDfdBcIN = 3.75MHz-67.0Small-Signal BandwidthSSBWInput at -20dB FS440MHzFull-Power BandwidthFPBWInput at -0.5dB FS440MHzAperture DelaytAD1.5nsAperture JittertAJ1dB SNR degradation at Nyquist2psRMSOverdrive Recovery Time1.5 × full-scale input2nsINTERNAL REFERENCE (REFIN = VDD; VREFP, VREFN, and VCOM are generated internally)REFP Output VoltageVREFP - VCOM0.256VREFN Output VoltageVREFN - VCOM-0.256VCOM Output VoltageVCOMVDD / 2- 0.15VDD / 2VDD / 2+ 0.15VDifferential Reference OutputVREFVREFP - VREFN0.512VDifferential Reference OutputTemperature CoefficientVREFTC±30ppm/°CMaximum REFP/REFN/COMSource CurrentISOURCE2mAMaximum REFP/REFN/COM SinkCurrentISINK2mABUFFERED EXTERNAL REFERENCE (VREFIN = 1.024V, VREFP, VREFN, and VCOM are generated internally)REFIN Input VoltageVREFIN1.024VCOM Output VoltageVCOMVDD / 2VDD / 2- 0.15VDD / 2+ 0.15VDifferential Reference OutputVREFVREFP - VREFN0.512VMaximum REFP/REFN/COMSource CurrentISOURCE2mA_______________________________________________________________________________________3

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MAX1191Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADCMAX1191ELECTRICAL CHARACTERISTICS (continued)

PARAMETERMaximum REFP/REFN/COM SinkCurrentREFIN Input ResistanceREFIN Input CurrentUNBUFFERED EXTERNAL REFERENCE (REFIN = GND, VREFP, VREFN, and VCOM are appliedREFP Input VoltageREFN Input VoltageCOM Input VoltageDifferential Reference InputVoltageREFP Input ResistanceREFN Input ResistanceDIGITAL INPUTS (CLK, PD0, PD1)CLKInput High ThresholdVIHPD0, PD1CLKInput Low ThresholdVILPD0, PD1Input HysteresisDigital Input Leakage CurrentDigital Input CapacitanceDIGITAL OUTPUTS (D7–D0, A/B)Output Voltage LowOutput Voltage HighTri-State Leakage CurrentTri-State Output CapacitancePOWER REQUIREMENTSAnalog Supply VoltageDigital Output Supply VoltageVDDOVDD2.71.83.03.6VDDVVVOLVOHILEAKCOUT5ISINK = 200µAISOURCE = 200µA0.8 xOVDD±50.2 xOVDDVVµApFVHYSTDIINDCINCLK at GND or VDDPD0 and PD1 at OGND or OVDD50.1±5±50.7 xVDD0.7 xOVDD0.3 xVDD0.3 xOVDDVCOMVREFRREFPRREFNVREFP - VREFNMeasured between REFP and COMMeasured between REFN and COMVREFP - VCOMVREFN - VCOM0.256-0.256VDD / 20.51244VVVVkΩkΩSYMBOLISINKCONDITIONSMINTYP2>500-0.7MAXUNITSmAkΩµAVVVµApF4_______________________________________________________________________________________

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Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, fC.) (Note 1)

CLK= 7.5MHz, C= -40°C to +85°C, unless otherwise noted. Typical values are at TREFP= CREFN= C= 0.33µF, TCOMA A= +25°PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSNormal operating mode, fIN = 1.875MHzat -0.5dB FS, CLK input from GND to VDD4.05.0Idle mode (tri-state), fIN = 1.875MHz at -0.5dB FS, CLK input from GND to VDD4.0mAAnalog Supply CurrentIDDStandby mode, CLK input from GND toVDD2.2Shutdown mode, CLK = GND or VDD,PD0 = PD1 = OGND0.15.0µANormal operating mode,fIN = 1.875MHz at -0.5dB FS, CL ≈ 10pF1.0mAIdle mode (tri-state), DC input, CLK =Digital Output Supply CurrentGND or VDD, PD0 = OVDD, PD1 = OGND0.15.0(Note 3)IODDStandby mode, DC input, CLK = GND orVDD, PD0 = OGND, PD1 = OVDD0.1µAShutdown mode, CLK = GND or VDD,PD0 = PD1 = OGND0.15.0TIMING CHARACTERISTICSCLK Rise to CHA Output Data50% of C LK to 50% of d ata, Fi gu r e 5ValidtDOA( No te 4) 168.5nsCLK Fall to CHB Output DataValidtDOB50% of C LK to 50% of d ata, Fi gu r e 5( No te 4) 168.5nsCLK Rise/Fall to A/B Rise/FallTimetDA/B50% of C LK to 50% of A/B, Fi gu r e 5( No te 4) 168.5nsPD1 Rise to Output EnabletENPD0 = OVDD5nsPD1 Fall to Output DisabletDISPD0 = OVDD5nsCLK Duty Cycle50%CLK Duty-Cycle Variation±10%Wake-Up Time from ShutdownModetWAKE, SD(Note 5)20µsWake-Up Time from StandbyModetWAKE, ST(Note 5)5.5µsDigital Output Rise/Fall Time20% to 80%2nsINTERCHANNEL CHARACTERISTICSCrosstalk RejectionfIN,X = 1.875MHz at -0.5dB FS,fIN,Y = 0.3MHz at -0.5dB FS (Note 6)-75dBAmplitude MatchingfIN = 1.875MHz at -0.5dB FS (Note 7)±0.03dBPhase MatchingfIN = 1.875MHz at -0.5dB FS (Note 7)±0.03Degrees_______________________________________________________________________________________5

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MAX1191Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADCMAX1191ELECTRICAL CHARACTERISTICS (continued)

Note 1:Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.

Note 2:SNR, SINAD, SFDR, HD3, and THD are based on a differential analog input voltage of -0.5dB FS referenced to the

amplitude of the digital output. SNR and THD are calculated using HD2 through HD6.

Note 3:The power consumption of the output driver is proportional to the load capacitance (CL).Note 4:Guaranteed by design and characterization. Not production tested.Note 5:SINAD settles to within 0.5dB of its typical value.

Note 6:Crosstalk rejection is measured by applying a high-frequency test tone to one channel and a low-frequency tone to the

second channel. FFTs are performed on each channel. The parameter is specified as power ratio of the first and secondchannel FFT test tone bins.

Note 7:Amplitude/phase matching is measured by applying the same signal to each channel, and comparing the magnitude and

phase of the fundamental bin on the calculated FFT.

Typical Operating Characteristics

(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, differential input at -0.5dB FS, fCLK=7.500567MHz at 50% duty cycle, TA= +25°C, unless otherwise noted.)

FFT PLOT CHANNEL A (DIFFERENTIAL INPUTS,

8192-POINT DATA RECORD)

MAX1191 toc01FFT PLOT CHANNEL B (DIFFERENTIAL INPUTS,

8192-POINT DATA RECORD)

MAX1191 toc02FFT PLOT CHANNEL A (DIFFERENTIAL INPUTS,

8192-POINT DATA RECORD)

-10-20AMPLITUDE (dB)-30-40-50-60-70-80-90

fINBHD2HD3fCLK = 7.500567MHzfINA = 3.020553MHzfINB = 1.000747MHzAINA = AINB = -0.5dB FSMAX1191 toc030-10-20AMPLITUDE (dB)-30-40-50-60-70-80-90

0.5

1.0

1.5HD2fCLK = 7.500567MHzfINA = 1.000747MHzfINB = 3.020553MHzAINA = AINB = -0.5dB FS0-10-20AMPLITUDE (dB)-30-40-50-60-70-80-90

fCLK = 7.500567MHzfINA = 1.000747MHzfINB = 3.020553MHzAINA = AINB = -0.5dB FS0

HD3fINBfINAHD2HD32.02.53.03.54.000.51.01.52.02.53.03.54.000.51.01.52.02.53.03.54.0

ANALOG INPUT FREQUENCY (MHz)ANALOG INPUT FREQUENCY (MHz)ANALOG INPUT FREQUENCY (MHz)

FFT PLOT CHANNEL B (DIFFERENTIAL INPUTS,

8192-POINT DATA RECORD)

MAX1191 toc04TWO-TONE IMD PLOT (DIFFERENTIAL INPUTS,

8192-POINT DATA RECORD)

-10-20AMPLITUDE (dB)-30-40-50-60-70-80-90

fIN1fIN2fCLK = 7.500567MHzfIN1 = 1.8MHzfIN2 = 2.3MHzAIN = -7dB FSMAX1191 toc050-10-20AMPLITUDE (dB)-30-40-50-60-70-80-90

0.5

1.0

1.5HD2fCLK = 7.500567MHzfINA = 3.020553MHzfINB = 1.000747MHzAINA = AINB = -0.5dB FS0

HD3fINA2.02.53.03.54.000.51.01.52.02.53.03.54.0

ANALOG INPUT FREQUENCY (MHz)ANALOG INPUT FREQUENCY (MHz)

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Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC

Typical Operating Characteristics (continued)(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, differential input at -0.5dB FS, fCLK=7.500567MHz at 50% duty cycle, TA= +25°C, unless otherwise noted.)

FFT PLOT CHANNEL A (SINGLE-ENDED INPUTS,

FFT PLOT CHANNEL B (SINGLE-ENDED INPUTS,

8192-POINT DATA RECORD)

0600

7fc0CLK = 7.500567MHzoct -10f1fCLK = 7.500567MHzot INA = 1.000747MHz911X-10f1INA = 1.000747MHz911A-20fINB = 3.020553MHzMAINA = AINB = -0.5dB FS-20fXINB = 3.020553MHzAMAINA = AINB = -0.5dB FS)B)d-30B(d-30 (E DEU-40DTU-40ITLIP-50LMP-50AM-60HD2HD3fAINB-60fINAHD2HD3-70-70-80-80-90

-90

0.5

1.0

1.52.02.53.03.54.000.51.01.52.02.53.03.54.0

ANALOG INPUT FREQUENCY (MHz)ANALOG INPUT FREQUENCY (MHz)

FFT PLOT CHANNEL A (SINGLE-ENDED INPUTS,

FFT PLOT CHANNEL B (SINGLE-ENDED INPUTS,

8192-POINT DATA RECORD)

0f00

cot 1f0CLK = 7.500567MHzCLK = 7.500567MHzcot -10fINA = 3.020553MHz911X-10f1INA = 3.020553MHz911A-20fINB = 1.000747MHzM-20fXAINB = 1.000747MHzAMINA = AINB = -0.5dB FSAINA = AINB = -0.5dB FS)B)d-30B(d-30 (E DEU-40DTU-40ITLIP-50LMP-50AM-60fINBHD2HD3A-60HD2HD3fINA-70-70-80-80-90

-90

0.51.01.52.02.53.03.54.000.51.01.52.02.53.03.54.0

ANALOG INPUT FREQUENCY (MHz)ANALOG INPUT FREQUENCY (MHz)

TWO-TONE IMD PLOT (SINGLE-ENDED INPUTS,

8192-POINT DATA RECORD)

0f1CLK = 7.500567MHzcot -10f1IN1 = 1.8MHz911-20fXIN2 = 2.3MHzAMAIN = -7dB FS)Bd-30( EDU-40fIN1fIN2TILP-50MA-60-70-80-90

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

ANALOG INPUT FREQUENCY (MHz)

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MAX1191Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADCMAX1191Typical Operating Characteristics (continued)(VDD= 3.0V, OVDD= 1.8V, VREFIN= VDD(internal reference), CL≈10pF at digital outputs, differential input at -0.5dB FS, fCLK=7.500567MHz at 50% duty cycle, TA= +25°C, unless otherwise noted.)

SIGNAL-TO-NOISE RATIOvs. ANALOG INPUT FREQUENCY

MAX1191 toc11SIGNAL-TO-NOISE AND DISTORTIONvs. ANALOG INPUT FREQUENCY

4948SNR (dB)474544

MAX1191 toc12504948SNR (dB)4745444342

ANALOG INPUT FREQUENCY (MHz)

CHANNEL ACHANNEL B50

4342

100

CHANNEL ACHANNEL B10

ANALOG INPUT FREQUENCY (MHz)

100

TOTAL HARMONIC DISTORTIONvs. ANALOG INPUT FREQUENCY

MAX1191 toc13SPURIOUS-FREE DYNAMIC RANGEvs. ANALOG INPUT FREQUENCY

8075SFDR (dB)70656055

MAX1191 toc14-45-50-55THD (dB)-60-65-70-75-80-85

ANALOG INPUT FREQUENCY (MHz)

CHANNEL ACHANNEL B85

5045

100

CHANNEL ACHANNEL B10

ANALOG INPUT FREQUENCY (MHz)

100

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Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC

SIGNAL-TO-NOISE RATIOSIGNAL-TO-NOISE AND DISTORTION

vs. ANALOG INPUT POWER

5160

6c1focIN = 2.017059MHzt o1t 911f91IN = 2.017059MHz150X1AXM50AM4040))BBdd(( RDN30AN30SIS202010100-30

-25

-20

-15

-10

-5

0-30

-20

-10

ANALOG INPUT POWER (dB FS)

TOTAL HARMONIC DISTORTIONSPURIOUS-FREE DYNAMIC RANGEvs. ANALOG INPUT POWER

vs. ANALOG INPUT POWER

-30

7180

8fc1IN = 2.017059MHzoct 19fo1IN = 2.017059MHzt 1911X1AXM-40

AM))ccBB60

dd(-50

( DRHDTFS50

-60

-70

30-30

-25

-20

-15

-10

-5

-30

-25

-20

-15

-10

-5

ANALOG INPUT POWER (dB FS)

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SIGNAL-TO-NOISE RATIOvs. SAMPLING RATE

MAX1191 toc19SIGNAL-TO-NOISE AND DISTORTION

vs. SAMPLING RATE

fIN = 2.017059MHz49

MAX1191 toc2050

fIN = 2.017059MHz49

SNR (dB)48

SINAD (dB)0

4747

10fCLK (MHz)

TOTAL HARMONIC DISTORTION

vs. SAMPLING RATE

MAX1191 toc21SPURIOUS-FREE DYNAMIC RANGE

vs. SAMPLING RATE

fIN = 2.017059MHz7570SFDR (dBc)65605550

MAX1191 toc22-50

fIN = 2.017059MHz-55-60THD (dBc)-65-70-75-80

10fCLK (MHz)

200510fCLK (MHz)

1520

10______________________________________________________________________________________

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