AD9020 Analog Devices, Inc., AD9020 Datasheet
AD9020
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AD9020 Summary of contents
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... Dynamic performance is fully characterized and production tested at +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 Prod- ucts Databook or current AD9020/883B data sheet for detailed specifications. REV. A Information furnished by Analog Devices is believed to be accurate and reliable ...
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... Harmonics 2.3 MHz 10.3 MHz 15.3 MHz IN 3/4 , 1/2 REF Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Operating Temperature AD9020JE/KE/JZ/ +70 C Storage Temperature . . . . . . . . . . . . . . . . . . . – +150 C Maximum Junction Temperature Lead Soldering Temp (10 sec +300 1.75 V; ENCODE = 40 MSPS unless otherwise noted) S SENSE Test AD9020JE/JZ Temp ...
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... Full VI + 140 Full VI + 2.8 Full VI Full C/ 2.6 C/ C/W (no air flow C/W (air flow = 500 LFM – –3– AD9020 AD9020KE/KZ Max Min Typ Max 0.5 1 2.0 0.8 0 800 800 2.4 0.4 530 440 530 ...
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... Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –V Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nitride Device AD9020JZ AD9020JE AD9020KZ AD9020KE AD9020SZ/883 – +125 C AD9020SE/883 – +125 C AD9020TZ/883 – +125 C AD9020TE/883 – +125 C AD9020/PCB *E = Ceramic Leadless Chip Carrier Ceramic Leaded Chip Carrier. 140 mils 4 mils 100 S AD1 ...
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... AD9020 PIN FUNCTION DESCRIPTIONS Function Midpoint of internal reference ladder. Negative supply voltage; nominally –5.0 V Positive supply voltage; nominally +5 V All ground pins should be connected together and to low impedance ground plane. Three-quarter point of internal reference ladder. Analog input; nominally between 1.75 V. ...
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... AD9020 THEORY OF OPERATION Refer to the AD9020 block diagram. As shown, the AD9020 uses a modified “flash,” or parallel, A/D architecture. The ana- log input range is determined by an external voltage reference (+V and –V ), nominally 1. internal resistor lad- REF REF der divides this reference into 512 steps, each representing two quantization levels ...
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... The actual resolution of the converter is limited by the thermal and quantization noise of the ADC. The low frequency test for SNR or ENOB is a good measure of the noise of the AD9020. At this frequency, the static errors in the ADC determine the useful dynamic range of the ADC. ...
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... AD9020 SNR and ENOB vs. Reference Voltage Applying a voltage greater than 4 V across the internal resistor ladder will cause current densities to exceed rated values, and may cause permanent damage to the AD9020. The design of the reference circuit should limit the voltage available to the , to adjust the SENSE references ...
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... R R/2 1/4 63 REF R/2 0 R/2 –V 57 SENSE * –V 56 REF * = WIRING 0.1 F RESISTANCE = < 5 AD9020 – 5V –9– AD9020 +V 3/4 1/2 1/4 –V AD9020 Equivalent Analog Input + V S DIGITAL BITS AND OVERFLOW AD9020 Equivalent Digital Outputs + 5.0V 13k ENCODE 14 AD9020 Equivalent Encode Circuit SENSE REF REF REF SENSE ...
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... Fast, clean edges will reduce the jitter in the signal and allow optimum ac performance. Locking the system clock to a crystal oscillator also helps reduce jitter. The AD9020 is designed to operate with a 50% duty cycle; small (10%) variations in duty cycle should not degrade performance. ...
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... ENCODE RATE = 40MSPS +55 C & +125 INPUT FREQUENCY – MHz AD9020 SNR and ENOB vs. Input Frequency +125 – INPUT FREQUENCY – MHz AD9020 Harmonics vs. Input Frequency ...
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... AD9713, a 12-bit monolithic DAC. The analog and recon- structed waveforms can be summed on the board to allow the user to observe the linearity of the AD9020 and the effects of the quarterpoint voltages. The digital data and an adjustable Data Ready signal are available through a 37-pin edge connector. ...