|Category||Multimedia => Video => A/D Converters|
|Description||10-bit 60 MSPS A/D Converter|
|Datasheet||Download AD9020PCB datasheet
FEATURES Monolithic 10-Bit/60 MSPS Converter TTL Outputs Bipolar 1.75 V) Analog Input 56 dB SNR @ 2.3 MHz Input Low (45 pF) Input Capacitance MIL-STD-883 Compliant Versions Available APPLICATIONS Digital Oscilloscopes Medical Imaging Professional Video Radar Warning/Guidance Systems Infrared Systems
R/2 3/4 REF R/2 1/2 REF R/2 1/4 REF R/2 V SENSE 57 VREF 56 ENCODE C T OVERFLOW L D OVERFLOW E 51 OVERFLOW 50 D9 (MSB) 19 D0 (LSB)
The AD9020 A/D converter a 10-bit monolithic converter capable of word rates of 60 MSPS and above. Innovative architecture using 512 input comparators instead of the traditional 1024 required by other flash converters reduces input capacitance and improves linearity. Encode and outputs are TTL-compatible, making the AD9020 an ideal candidate for use in low power systems. An overflow bit is provided to indicate analog input signals greater than +VSENSE. Voltage sense lines are provided to insure accurate driving of the ± VREF voltages applied to the units. Quarter-point taps on the resistor ladder help optimize the integral linearity of the unit. Either 68-pin ceramic leaded (gull wing) packages or ceramic LCCs are available and are specifically designed for low thermal impedances. Two performance grades for temperatures of both to +70°C and to +125°C ranges are offered to allow the user to select the linearity best suited for each application. Dynamic performance is fully characterized and production tested +25°C. MIL-STD-883 units are available. The AD9020 A/D Converter is available in versions compliant with MIL-STD-883. Refer to the Analog Devices Military Products Databook or current AD9020/883B data sheet for detailed specifications.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997+VS. +6 V VS. 6 V ANALOG IN. +2 V +VREF, VREF, +2 V +VREF to VREF. 4.0 V DIGITAL V to +VS
1/2REF, 1/4REF Current. 10 mA Digital Output Current. 20 mA Operating Temperature to +70°C Storage Temperature. to +150°C Maximum Junction Temperature2. +175°C Lead Soldering Temp (10 sec). +300°C
Parameter (Conditions) RESOLUTION DC ACCURACY Differential Nonlinearity Integral Nonlinearity No Missing Codes ANALOG INPUT Input Bias Current4 Input Resistance Input Capacitance4 Analog Bandwidth REFERENCE INPUT Reference Ladder Resistance Ladder Tempco Reference Ladder Offset Top of Ladder Bottom of Ladder Offset Drift Coefficient SWITCHING PERFORMANCE Conversion Rate Aperture Delay (tA) Aperture Uncertainty (Jitter) Output Delay (tOD)5 Output Time Skew5 DYNAMIC PERFORMANCE Transient Response Overvoltage Recovery Time Effective Number of Bits (ENOB) fIN = 2.3 MHz fIN = 10.3 MHz fIN = 15.3 MHz Signal-to-Noise Ratio6 fIN = 2.3 MHz fIN = 10.3 MHz fIN = 15.3 MHz Signal-to-Noise Ratio6 (Without Harmonics) fIN = 2.3 MHz fIN = 10.3 MHz fIN = 15.3 MHz+25°C Full +25°C Full +25°C Full +25°C Full +25°C Full +25°C Full +25°C
Parameter (Conditions) Temp Test Level Min AD9020JE/JZ Typ Max AD9020KE/KZ Min Typ Max Units DYNAMIC PERFORMANCE (continued) Harmonic Distortion +25°C fIN = 2.3 MHz +25°C fIN = 10.3 MHz +25°C fIN = 15.3 MHz Two-Tone Intermodulation +25°C Distortion Rejection7 Differential Phase +25°C Differential Gain +25°C ENCODE INPUT Logic "1" Voltage Logic "0" Voltage Logic "1" Current Logic "0" Current Input Capacitance Pulse Width (High) Pulse Width (Low) DIGITAL OUTPUTS Logic "1" Voltage (IOH = 2 mA) Logic "0" Voltage (IOL = 6 mA) POWER SUPPLY +VS Supply Current VS Supply Current Power Dissipation Power Supply Rejection Ratio (PSRR)8 Full +25°C Full +25°C Full +25°C Full +25°C Full
NOTES 1 Absolute maximum ratings are limiting values to be applied individually, and beyond which the service ability of the circuit may be impaired. Functional operability is not necessarily implied. Exposure to absolute maximum rating conditions for an extended period of time may affect device reliability. 2 Typical thermal impedances (part soldered onto board): 68-pin leaded ceramic chip carrier: = 17°C/W (no air flow); = 15°C/W (air flow = 500 LFM). 68-pin ceramic LCC: = 15°C/W (no air flow); = 13°C/W (air flow = 500 LFM). 3/4REF, 1/2REF, and 1/4REF reference ladder taps are driven from dc sources 0 V, and 0.875 V, respectively. Accuracy of the overflow comparator is not tested and not included in linearity specifications. 4 Measured with ANALOG = +V SENSE. 5 Output delay measured as worst-case time from 50% point of the rising edge of ENCODE to 50% point of the slowest rising or falling edge D 0D9. Output skew measured as worst-case difference in output delay among 0D9. 6 RMS signal to rms noise with analog input signal 1 dB below full scale at specified frequency. 7 Intermodulation measured with analog input frequencies of 2.3 MHz and 3.0 MHz 7 dB below full scale. 8 Measured as the ratio of the worst-case change in transition voltage of a single comparator for a 5% change S or VS. Specifications subject to change without notice.
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