AD7472 Analog Devices, AD7472 Datasheet
AD7472
Specifications of AD7472
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AD7472 Summary of contents
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... This method allows very low power dissipation numbers at lower throughput rates. In this mode, the AD7472 can be operated with 3 V supplies at 100 kSPS, and consume an average current of just 124 µ supplies and 100 kSPS, the average current consumption is 171 µ ...
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... AD7470/AD7472 AD7470–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE Signal to Noise + Distortion (SINAD) Signal-to-Noise Ratio (SNR) Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise (SFDR) Intermodulation Distortion (IMD) Second-Order Terms Third-Order Terms Aperture Delay Aperture Jitter Full Power Bandwidth DC ACCURACY Resolution Integral Nonlinearity ...
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... NOTES 1 Temperature ranges as follows: A and B Versions: –40°C to +85°C. The AD7472 functionally works at 2.35 V. Typical specifications @ 25°C for SNR (100 kHz dB; THD (100 kHz) = –84 dB; INL ± 0.8 LSB Sample tested @ 25°C to ensure compliance. 4 See Power vs. Throughput Rate section. ...
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... Normal Mode Sleep Mode NOTES 1 Temperature ranges as follows: Y Version: –40°C to +125°C. The AD7472 functionally works at 2.35 V. Typical specifications @ 25°C for SNR (100 kHz dB; THD (100 kHz) = –84 dB; INL ± 0.8 LSB Sample tested @ 25°C to ensure compliance. 4 See Power vs. Throughput Rate section. ...
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... OUTPUT PIN C L 50pF 200 –5– AD7470/AD7472 unless otherwise noted.) MIN MAX Description t = 1/f CLK CLK IN Wake-Up Time CONVST Pulse Width CONVST to BUSY Delay and B Versions Version ...
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... This board is a complete unit allowing control and communicate with all Analog Devices evaluation boards ending in the CB designators. To order a complete evaluation kit, you need to order the specific ADC evaluation board, for example, EVAL-AD7472CB, the EVAL CONTROL BRD2, and transformer. See the relevant evaluation board application note for more information. ...
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... Master Clock Input. The clock source for the conversion process is applied to this pin. Conversion time for the AD7472 takes 14 clock cycles, and conversion time for the AD7470 takes 12 clock cycles. The frequency of this master clock input, therefore, determines the conversion time and achievable throughput rate. While the ADC is not converting, the clock-in pad is in three-state and thus no clock is going through the part ...
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... V logic. DB0–DB9/11 Data Bit 0 to Data Bit 9 (AD7470) and DB11 (AD7472). Parallel digital outputs that provide the conversion result for the part. These are three-state outputs that are controlled by CS and RD. The output high voltage level for these ...
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... The first transition is a 0.5 LSB above the low end of the scale (zero in the case of AD7470/ AD7472). The gain error is the deviation of the actual difference between the first and last code transitions from the ideal differ- ence between the first and last code transitions with offset errors removed ...
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... The CS and RD lines are then activated in parallel to read the 10- or 12-data bits. The recom- mended REF IN voltage is 2.5 V providing an analog input range 2.5 V, making the AD7470/AD7472 a unipolar ADC recommended to perform a dummy conversion after power-up as the first conversion result could be incorrect. This COMPARATOR also ensures that the part is in the correct mode of operation ...
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... The output coding of the AD7470/AD7472 is straight binary. The designed code transitions occur midway between succes- sive integer LSB values (0.5 LSB, 1.5 LSB, etc). The LSB size is equal to (REF IN)/4096 for the AD7472 and to (REF IN)/1024 for the AD7470. The ideal transfer characteristic for the AD7472 is shown in Figure 6. ...
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... AD7470/AD7472 PARALLEL INTERFACE The parallel interfaces of the AD7470 and AD7472 are 10 bits and 12 bits wide, respectively. The output data buffers are acti- vated when both CS and RD are logic low. At this point, the con- tents of the data register are placed onto the data bus. Figure 10 shows the timing diagram for the parallel port ...
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... V supply, the V DRIVE The ADC has better dynamic performance than operating the part while still being able to interface parts, pushes the AD7470/AD7472 to the top bracket of high performance 10-bit/12-bit ADCs. Of course, the ADC can have its V and DV DRIVE ered from supply ...
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... During the wake-up phase, the AD7472 will draw 650 µA typically. Overall power dissipated is ( 531 CONVST BUSY QUIESCENT 1.468 s TPC 1 sand TPC 2 show a typical graphical representation of Power vs. Throughput for the AD7472 when in (a) Mode and 3 V and Mode and 3 V –14– µ × ...
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... TPC 2. Power vs. Throughput (Mode and 3 V) 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 512 1024 1536 2048 2560 CODE TPC 3. Typical INL for 2. ° C Typical Performance Characteristics–AD7470/AD7472 –0.2 –0.4 –0.6 –0.8 –1.0 1100 1300 1500 600 650 700 750 3072 3584 4096 1.0 0.8 0.6 0.4 ...
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... AD7470/AD7472 70.6 70.4 –40 C +25 C 70.2 70.0 69.8 69.6 69.4 69.2 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 SUPPLY (V) TPC 7. Typical SNR vs. Supply 0 –20 –40 –60 –80 –100 –120 0 100 200 300 FREQUENCY (kHz) TPC 8. Typical SNR @ 500 kHz Input Tone 0.2 –0.3 –0.8 –1.3 +85 C –1.8 –2.3 –2.8 –3.3 –3.8 10 400 500 600 –16– ...
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... AD7470/ AD7472 should use as large a trace as possible to provide a low impedance path and reduce the effects of glitches on the power supply line; avoid crossover of digital and analog signals and place traces that are on opposite sides of the board at right angles to each other ...
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... PORTC and PORTD of the microcontroller are AD7470/ bidirectional and used to address the AD7470/AD7472 and also AD7472* to read in the 10-bit (AD7470) or 12-bit (AD7472) data. The OE pin on the PIC can be used to enable the output buffers on the AD7470/AD7472 and to perform a read operation. CS ...
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... CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN (RU-24) Dimensions shown in millimeters 7.90 7.80 7. 4.50 4.40 4.30 6.40 BSC 1 12 0.65 1.20 BSC MAX 0.30 0.20 SEATING 0.19 PLANE 0.09 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-153AD –19– AD7470/AD7472 0.75 (0.0295) 45 0.25 (0.0098 1.27 (0.0500) 0.40 (0.0157) 0. 0.60 0.45 ...
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... AD7470/AD7472 Revision History Location 10/03—Data Sheet changed from REV REV. B. Added Y version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Universal Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Changes to TIMING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Changes to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Changes to PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Changes to Offset Error description Changes to Gain Error description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Changes to OPERATING MODES section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Changes to POWER-UP section ...