Dual 10-Bit 50MSPS CMOS March 2000-1 FEATURES APPLICATI
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XRD64L44
Dual 10-Bit 50MSPS CMOS
March 2000-1
FEATURES
APPLICATIONS
10-Bit Resolution
Monolithic Complete 10-Bit ADCs MSPS Conversion Rate On-Chip Track-and-Hold On-Chip Voltage Reference Input Capacitance TTL/CMOS Outputs Tri-State Output Buffers Single Power Supply Operation Power Dissipation: 250mW-typ 3.0V -40°C +85°C Operation Temperature Range
Medical Ultrasound Imaging Modems
BENEFITS
Reduction Components Reduction System Cost High Performance Power Dissipation Long Term Time Temperature Stability
GENERAL DESCRIPTION XRD64L44 10-bit, monolithic, MSPS ADCs. Manufactured using standard CMOS process, XRD64L44 offers power, cost excellent performance. on-chip track-and-hold amplifier(T/H) voltage reference (VREF) eliminate need external active components, requiring only external conversion clock application. XRD64L44 analog input driven with ease high input impedance 25KOhms 5pF. design architecture uses time- interleaved 10bit ADCs each converter achieve high conversion rate MSPS minimum. order insure maintain accurate 10-bit operation with respect time temperature, XRD64L44 incorporates auto-calibration circuit which continuously adjusts matches offset linearity each ADC. This auto-calibration circuit transparent user after initial 3.4ms calibration (168,000 initial clock cycles). power dissipation only 250mW MSPS 225mW MSPS with +3.0V power supply. digital output data straight binary format, tri-state disable function provided common interface. XRD64L44 internal reference provides cost savings simplifies design/development. output voltage internal reference external resistors. internal reference disabled external reference used power savings 50mW.
ORDERING INFORMATION
Part Number XRD64L44AIV Package Type 64-Lead TQFP Temperature Range -40°C +85°C
Rev. P1.00
EXAR Corporation, 48720 Kato Road, Fremont, 94538 (510) 668-7000 (510) 668-7017
XRD64L44
VCLMPA VINA+ VINA-
Bandgap
A/D's
VFBK VRHF
DA0, OTRA TRI_A DIFF SYNCO CKIN CLAMP
CONTROL LOGIC
A/D's
VRLF
VCMO
DB0, OTRB TRI_B
VCLMPB VINB+ VINB-
Figure XRD64L44 Simplified Block Diagram
Rev. P1.00
XRD64L44
DOGND
DOVDD
DGND
DVDD
OTRA
OTRB
VCMO DGND AGND AVDD AGND AGND VINBVINB+ AGND VINA+ VINAAGND AVDD AVDD AGND AGND
DGND DOVDD DOGND SYNCO CKIN TRI_A
XRD64L44 64QFP
VCLMPA
VCLMPB
VRHF
VRHF
VFBK
VRLF
VRLF
Rev. P1.00
CLAMP
AGND
DGND
DGND
TRI_B
DVDD
DIFF
XRD64L44
DESCRIPTION
Symbol VFBK VRHF VRHF VRLF VRLF VCLMPA VCLMPB AGND DGND DGND DVDD TRI_B DIFF CLAMP TRI_A CKIN SYNCO DOGND DOVDD DGND OTRB DOVDD DOGND DVDD
Description Bandgap Voltage Output Analog Reference Feedback Voltage Reference Force Voltage Reference Force Bottom Voltage Reference Force Bottom Voltage Reference Force Analog Input Clamp Analog Input Clamp Analog Ground Digital Ground Digital Ground Power Down Digital Supply Voltage Tri-state Channel Outputs Differential Single-Ended Input Mode Digital Clamp Control Tri-state Channel Outputs Clock Input Data Valid Output Digital Output (LSB) Digital Output Digital Output Digital Output Ground Digital Output Supply Voltage Digital Ground Digital Output Digital Output Digital Output Digital Output Digital Output Digital Output Digital Output (MSB) Over Range Digital Output Digital Output (LSB) Digital Output Digital Output Digital Output Digital Output Digital Output Supply Voltage Digital Output Ground Digital Supply Voltage
Rev. P1.00
DESCRIPTION (CONT'D)
Symbol DGND OTRA VCMO DGND AGND AVDD AGND AGND VINBVINB+ AGND VINA+ VINAAGND AVDD AVDD AGND AGND Description Digital Ground Digital Output Digital Output Digital Output Digital Output Digital Output Over Range Digital Output Differential Common Mode Voltage Output Digital Ground Analog Ground Analog Supply Voltage Analog Ground Analog Ground Analog Input B(-) Analog Input B(+) Analog Ground Analog Input A(+) Analog Input A(-) Analog Ground Analog Supply Voltage Analog Supply Voltage Analog Ground Analog Ground
XRD64L44
Rev. P1.00
XRD64L44
ELECTRICAL CHARACTERISTICS TABLE (CONT'D) Test Conditions (Unless Otherwise Specified) 25°C AVDD DVDD +3.3V, +2.5V, VRLF GND, VRHF +2.5V MSPS, Duty Cycle, Differential Input Mode
Symbol Parameter Min. Typ. Max. Unit Conditions/Comments ACCURACY Differential Non-Linearity Integral Non-Linearity Monotonicity Full Scale Error Zero Scale Error -1.0 +/-0.4 +/-1.1 Missing Codes Guaranteed Test F.S. (VRHF VRLF)x0.97 Single Ended Mode
ANALOG INPUT INVR INRES INCAP INBW Input Voltage Range Input Resistance Input Capacitance Input Bandwidth
VRHFx0.97
VRLF Grounded
KOhms -1dB Small Signal
REFERENCE INPUT, INTERNAL BANDGAP REFERENCE REFERENCE BUFFER RLAD RLADTCO VBGTC VRLF VRHF VRHF External Reference VRHF PSRR Internal Reference Buffer Ladder Resistance Ladder Resistance Tempco Bandgap Output Voltage Range Bandgap Reference Tempco
VRLF+1.0 VRLF+1.0
+0.8 1.25
Ohms Ohms/°C ppm/°C
AVdd-0.6
Internal Reference Buffer External mV/V
AVdd
CONVERSION TIMING CHARACTERISTICS 10pF) MAXCON MINCON PDEL APJT tden tdis CLKDC Maximum Conversion Rate Minimum Conversion Rate Pipeline Delay(Latency) Aperture Delay Time Aperture Jitter Time Digital Output Rise Time Digital Output Fall Time Output Data Propagation Delay Output Data Enable Delay Output Data Disable Delay Clock Duty Cycle MSPS KSPS Guaranteed Design Guaranteed Design Guaranteed Design Peak-to Peak Clock Cycles Digital Data Delay
Rev. P1.00
XRD64L44
ELECTRICAL CHARACTERISTICS TABLE (CONT'D) Test Conditions (Unless Otherwise Specified) 25°C AVDD DVDD +3.3V, +2.5V, VRLF GND, VRHF +2.5V, Duty Cycle, Differential Input Mode
SymbolParameter DYNAMIC PERFORMANCE 40MHz Signal-to-Noise Ratio SINAD Signal-to Noise Distortion 12.5 ENOB Effective Number Bits 12.5 SFDR Spurious Free Dynamic Range SFDR Crosstalk Including Harmonics Min. Typ. Max. Unit Conditions/Comments
Rev. P1.00
XRD64L44
ELECTRICAL CHARACTERISTICS TABLE (CONT'D) Test Conditions (Unless Otherwise Specified) 25°C AVDD DVDD +3.3V, +2.5V, VRLF GND, VRHF +2.5V, Duty Cycle, Differential Input Mode
SymbolParameter DYNAMIC PERFORMANCE 50MHz Signal-to-Noise Ratio SINAD Signal-to Noise Distortion 12.5 ENOB Effective Number Bits 12.5 SFDR Spurious Free Dynamic Range SFDR Crosstalk Including Harmonics Min. Typ. Max. Unit Conditions/Comments
Rev. P1.00
XRD64L44
ELECTRICAL CHARACTERISTICS TABLE (CONT'D) Test Conditions (Unless Otherwise Specified) 25°C AVDD DVDD +3.3V, +2.5V, VRLF GND, VRHF +2.5V MSPS, Duty Cycle, Differential Input Mode
SymbolParameter DIGITAL INPUTS DVINH DVINL DIINH Digital Input High Voltage Digital Input Voltage Min. Typ. Max. Unit Conditions/Comments
Digital Input High Current (The DIFF input internal pull-up resistor, TRI_A TRI_B have internal pull-down resistors
CKIN DIFF
Clock Input Differential/Single-Ended Input
-5.0 -1.0
0.05 -0.25
-50.0
TRI_A/TRI_B Channel Tri-State DIINL
-125.0 -90.0
Digital Input Current (The DIFF input internal pull-up resistor, TRI_A TRI_B have internal pull-down resistors
CKIN DIFF
Clock Input Differential/Single-Ended Input
-5.0 50.0 -1.0
0.05 90.0 0.25
125.0
TRI_A/TRI_B Channel Tri-State DINC Digital Input Capacitance
DIGITAL OUTPUTS DOHV DOLV Digital Output High Voltage Digital Output Voltage High-Z Leakage
DVdd -0.4VDVdd-0.3V
POWER SUPPLIES AVDD DVDD AIDD DIDD DOIDD VRHF PDISS AIDD DIDD DOIDD VRHF PDISS Analog Power Supply Voltage Digital Power Supply Range Analog Supply Current Digital Supply Current Output Driver Current Voltage Force Current Power Dissipation Analog Supply Current Digital Supply Current Output Driver Current Voltage Force Current Power Dissipation VRHF/125, VRHF 1.0V VRHF/125, VRHF 1.0V DVDD AVDD
MHz, AVdd DVdd 3.0V, 10pF, 10MHz
MHz, AVdd DVdd 3.0V, 10pF, 10MHz
Rev. P1.00
XRD64L44
ABSOLUTE MAXIMUM RATINGS +25°C unless otherwise noted)1,
Notes: Stresses above those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation above this specification implied. Exposure maximum rating conditions extended periods affect device reliability. input which value outside absolute maximum ratings should protected Schottky diode clamps (HP5082-2835) from input supplies. inputs have protection diodes which will protect device from short transients outside supplies less than 100mA less than 100ms. refers AVDD DVDD. refers AGND DGND
Rev. P1.00
2000V
Inputs Outputs Storage Temperature
+0.5 -0.5V +0.5 -0.5V +0.5 -0.5V +0.5 -0.5V -65°C 150°C
+7.0V
Lead Temperature (Soldering seconds) 300°C Maximum Junction Temperature 150°C Package Power Dissipation Ratings (TA= +70°C) SSOP 89.4°C/W
XRD64L44
60.00
55.00 SINAD
SINAD
50.00
45.00
40.00
3.0V 3.2V 3.4V 3.6V
2.8V
3.0V 2.90MHz
3.2V 6.90MHz
3.4V 9.90MHz
3.6V
Fclk 50.0MHz Fclk 56.7MHz
Fclk 53.3MHz Fclk 60.0MHz
Figure SINAD 40.0MHz, DIFFERENTIAL INPUT MODE
0.00 -20.00
Figure SINAD Fclock DIFFERENTIAL INPUT MODE
0.00
Relative Power
Relative Power
-40.00 -60.00 -80.00 -100.00 -120.00
Single Tone 8192 Point SFDR -72.66 SINAD -57.97
-20.00
-40.00
Single Tone 8192 Point SFDR -69.77 SINAD -57.11
-60.00
-80.00
-100.00
-120.00 10.0 12.0 14.0 16.0 18.0
12.1
16.1
Frequency
Frequency
Figure Spectrum @Fclock 40.0MHz, 4.0MHz, DIFFERENTIAL INPUT MODE
Figure Spectrum @Fclock 40.0MHz, 10.0MHz, DIFFERENTIAL INPUT MODE
0.00
Relative Power
SINAD
-20.00 -40.00 -60.00 -80.00 -100.00 -120.00
Single Tone 8192 Point SFDR -62.57 SINAD -55.25
2.8V 3.0V 2.90MHz 3.2V 6.90MHz 3.4V 9.90MHz 3.6V
12.1
16.1
Frequency
Figure SINAD 40.0MHz, SINGLE-ENDED INPUT MODE
Figure Spectrum @Fclock 40.0MHz, 4.0MHz, Single-ended INPUT MODE
Rev. P1.00
XRD64L44
0.00 -20.00 -40.00 -60.00 -80.00 -100.00 -120.00 10.0 12.0 14.0 16.0
60.00 Single Tone 8192 Point SFDR -60.95 SINAD -54.48 SINAD
18.0
Relative Power
55.00
50.00
45.00 2.80V 3.00V 2.90MHz 3.20V 6.90MHz 3.40V 9.90MHz 3.60V
Frequency
Figure Spectrum @Fclock 40.0MHz, 10.0MHz, Single-ended INPUT MODE
0.00 -20.00 Relative Power -40.00 -60.00 -80.00 -100.00 Single Tone 8192 Point SFDR -66.93 SINAD -56.70
Figure SINAD 50.0MHz, DIFFERENTIAL INPUT MODE
0.00 -20.00
Relative Power
-40.00 -60.00 -80.00 -100.00 -120.00
Single Tone 8192 Point SFDR -66.93 SINAD -56.70
-120.00 12.0 16.0 20.0 24.1 Frequency
10.0 12.5 15.0 17.5 20.0 22.5 Frequency
Figure Spectrum @Fclock 50.0MHz, 4.0MHz, DIFFERENTIAL INPUT MODE
0.00 -20.00
Figure SINAD @Fclock 50.0MHz, 12.5MHz, DIFFERENTIAL INPUT MODE
Relative Power
-40.00 -60.00 -80.00 -100.00 -120.00
Single Tone 8192 Point SFDR -64.15 SINAD -50.91 SINAD
10.5 12.1 13.6 15.1 16.6 18.1 19.6 21.1 22.6 24.1
60.00
55.00
50.00
45.00
40.00 2.80V 3.00V 2.90MHz 3.20V 6.90MHz 3.40V 9.90MHz 3.60V
Frequency
Figure Spectrum @Fclock 50.0MHz, 24.1MHz, DIFFERENTIAL INPUT MODE
Figure SINAD 50.0MHz, SINGLE-ENDED INPUT MODE
Rev. P1.00
XRD64L44
0.00 -20.00 Single Tone 8192 Point SFDR -64.09 SINAD -54.21
0.00 -20.00
Relative Power
Relative Power
-40.00 -60.00 -80.00
-40.00
Single Tone 8192 Point SFDR -54.01 SINAD -51.75
-60.00 -80.00 -100.00 -120.00
-100.00 -120.00 12.0 16.0 20.0 24.0
10.0
12.5
15.0
17.5
20.0
22.5
quency
Frequency
Figure SINAD @Fclock 50.0MHz, 4.0MHz, SINGLE-ENDED INPUT MODE
0.00 -20.00 Relative Power -40.00 -60.00 -80.00 -100.00 -120.00
12.1 15.1 18.1 21.1 24.1
Figure SPECTRUM @Fclock 50.0MHz, 12.5MHz, SINGLE-ENDED INPUT MODE
Single Tone 8192 Point SFDR -53.43 SINAD -47.36
Frequency
Figure SINAD @Fclock 50.0MHz, 24.1MHz, SINGLE-ENDED INPUT MODE
Rev. P1.00
XRD64L44
Preliminary Notes
Rev. P1.00
XRD64L44
NOTICE EXAR Corporation reserves right make changes products contained this publication order improve design, performance reliability. EXAR Corporation assumes responsibility circuits described herein, conveys license under patent other right, makes representation that circuits free patent infringement. Charts schedules contained here only illustration purposes vary depending upon user's specific application. While information this publication been carefully checked; responsibility, however, assumed accuracies. EXAR Corporation does recommend products life support applications where failure malfunction product reasonably expected cause failure life support system significantly affect safety effectiveness. Products authorized such applications unless EXAR Corporation receives, writing, assurances satisfaction that: risk injury damage been minimized; user assumes such risks; potential liability EXAR Corporation adequately protected under circumstances.
Copyright 1999 EXAR Corporation
Datasheet February 1999 Reproduction, part whole, without prior written consent EXAR Corporation prohibited.
Rev. P1.00
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