AD9243ASZ Analog Devices Inc, AD9243ASZ Datasheet
AD9243ASZ
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AD9243ASZ Summary of contents
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FEATURES Monolithic 14-Bit, 3 MSPS A/D Converter Low Power Dissipation: 110 mW Single +5 V Supply Integral Nonlinearity Error: 2.5 LSB Differential Nonlinearity Error: 0.6 LSB Input Referred Noise: 0.36 LSB Complete: On-Chip Sample-and-Hold Amplifier and Voltage Reference Signal-to-Noise ...
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AD9243–SPECIFICATIONS (AVDD = +5 V, DVDD = +5 V, DRVDD = + SPECIFICATIONS otherwise noted) Parameter RESOLUTION MAX CONVERSION RATE INPUT REFERRED NOISE REF V = 2.5 V REF ACCURACY Integral Nonlinearity (INL) ...
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V, DVDD DRVDD = + SPECIFICATIONS Differential Input, T Parameter SIGNAL-TO-NOISE AND DISTORTION RATIO (S/N+ 500 kHz INPUT f = 1.5 MHz INPUT EFFECTIVE NUMBER OF BITS (ENOB ...
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AD9243 SWITCHING SPECIFICATIONS Parameters 1 Clock Period CLOCK Pulsewidth High CLOCK Pulsewidth Low Output Delay Pipeline Delay (Latency) NOTES 1 The clock period may be extended without degradation in specified performance @ +25 C. Specifications subject to ...
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PIN DESCRIPTION Pin Number Name Description 1 DVSS Digital Ground 2, 29 AVSS Analog Ground 3 DVDD +5 V Digital Supply 4, 28 AVDD +5 V Analog Supply 5 DRVSS Digital Output Driver Ground 6 DRVDD Digital Output Driver Supply ...
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AD9243 Typical Differential AC Characterization Curves/Plots 90 14.7 85 13.8 80 13.0 –0.5dBFS 75 12.2 –6.0dBFS 70 11.3 65 10.5 –20.0dBFS 60 9.7 55 8.8 50 8.0 100k 1M 10M 20M INPUT FREQUENCY – Hz Figure 2. SINAD vs. Input ...
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Other Characterization Curves/Plots 2.5 2.0 1.5 1.0 0.5 0.0 –0.5 –1.0 –1.5 0 16383 CODE Figure 11. Typical INL (Input Span = 14.7 85 13.8 80 13.0 75 12.2 –0.5dBFS 70 11.3 –6.0dBFS 65 10.5 60 9.7 ...
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AD9243 INTRODUCTION The AD9243 utilizes a four-stage pipeline architecture with a wideband input sample-and-hold amplifier (SHA) implemented on a cost-effective CMOS process. Each stage of the pipeline, excluding the last stage, consists of a low resolution flash A/D connected to ...
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The input SHA of the AD9243 is optimized to meet the perfor- mance requirements for some of the most demanding commu- nication, imaging, and data acquisition applications while maintaining low power dissipation. Figure graph of the full-power ...
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AD9243 0.1 F *OPTIONAL SERIES RESISTOR Figure 25. Series Resistor Isolates Switched-Capacitor SHA Input from Op Amp. Matching Resistors Improve SNR Performance The optimum size of this resistor ...
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REFERENCE OPERATION The AD9243 contains an onboard bandgap reference that pro- vides a pin-strappable option to generate either 2.5 V output. With the addition of two external resistors, the user can generate reference voltages other than ...
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AD9243 DRIVING THE ANALOG INPUTS INTRODUCTION The AD9243 has a highly flexible input structure allowing it to interface with single-ended or differential input interface cir- cuitry. The applications shown in sections “Driving the Analog Inputs” and “Reference Configurations” along with ...
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DC Coupling with Op Amps Applications that require dc coupling can also benefit by driving the AD9243 differentially. Since the signal swing requirements of each input is reduced by a factor of two in the differential mode, the AD9243 can ...
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AD9243 If the application requires the largest single-ended input range (i.e the AD9243, the op amp will require larger supplies to drive it. Various high speed amplifiers in the “Op Amp Selection Guide” of ...
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A Other input ranges could be selected by changing VREF but the A/D’s distortion performance will degrade slightly as the input common-mode voltage deviates from its optimum level of 2.5 V. Alternative ...
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AD9243 Shorting the VREF pin directly to the SENSE pin places the internal reference amplifier in unity-gain mode and the resultant VREF output Therefore, the valid input range However, shorting the ...
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The AD9243 contains an internal reference buffer, A2 (see Figure 26), that simplifies the drive requirements of an external reference. The external reference must be able to drive 20%) load. Note that the bandwidth of the ...
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AD9243 until the analog input returns within the input range and an- other conversion is completed. By logical ANDing OTR with the MSB and its complement, overrange high or underrange low conditions can be detected. Table truth ...
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GROUNDING AND DECOUPLING Analog and Digital Grounding Proper grounding is essential in any high speed, high resolution system. Multilayer printed circuit boards (PCBs) are recom- mended to provide optimal grounding and power schemes. The use of ground and power planes ...
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AD9243 APPLICATIONS DIRECT IF DOWN CONVERSION USING THE AD9243 As previously noted, the AD9243’s performance in the differen- tial mode of operation extends well beyond its baseband region and into several Nyquist zone regions. Hence, the AD9243 may be well ...
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AVSS1 AVSS2 AVDD1 AVDD2 REV. A DVDD DRVDD DVSS DRVSS Figure 51. Evaluation Board Schematic –21– AD9243 SJ5 SJ4 SJ3 SJ2 SJ1 JG1 ...
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AD9243 Figure 52. Evaluation Board Component Side Layout (Not to Scale) Figure 53. Evaluation Board Solder Side Layout (Not to Scale) –22– REV. A ...
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Figure 54. Evaluation Board Ground Plane Layout (Not to Scale) Figure 55. Evaluation Board Power Plane Layout (Not to Scale) REV. A –23– AD9243 ...
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AD9243 1.03 (0.041) 0.73 (0.029) 0.25 (0.01) 0.23 (0.009) 0.13 (0.005) OUTLINE DIMENSIONS Dimensions shown in mm and (inches). 44-Lead Metric Quad Flatpack (MQFP) (S-44) 13.45 (0.530) 12.95 (0.510) 2.45 (0.096) 10.1 (0.398) MAX 9.90 (0.390 MIN 1 ...