AD7813 Analog Devices, AD7813 Datasheet
AD7813
Specifications of AD7813
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AD7813 Summary of contents
Page 1
... This feature significantly reduces the power consumption of the part at lower throughput rates. The AD7813 can also operate in a high speed mode where the part is not powered down between conversions. In this mode of opera- tion the part is capable of providing 400 kSPS throughput. ...
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... AD7813–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE 1 Signal to (Noise + Distortion) Ratio 1 Total Harmonic Distortion (THD) 1 Peak Harmonic or Spurious Noise 2 Intermodulation Distortion 2nd Order Terms 3rd Order Terms DC ACCURACY Resolution Minimum Resolution for Which No Missing Codes Are Guaranteed 1 Relative Accuracy 1 Differential Nonlinearity (DNL) 1 Gain Error ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD7813 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... CONVST 4 CONVST signal. A high-to-low transition on this line initiates the conversion process if the internal CONVST signal is low. Depending on the signal on this pin at the end of a conversion, the AD7813 automatically powers down. CS Chip Select. This is a logic input used in conjunction with RD to enable outputs. ...
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... N-bit converter with a sine wave input is given by: Signal to (Noise + Distortion) = (6.02N + 1.76) dB Thus for an 10-bit converter, this is 62 dB. Total Harmonic Distortion Total harmonic distortion (THD) is the ratio of the rms sum of harmonics to the fundamental. For the AD7813 it is defined as ...
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... DAC Analog Input Figure 5 shows an equivalent circuit of the analog input struc- CONTROL ture of the AD7813. The two diodes, D1 and D2, provide ESD LOGIC protection for the analog inputs. Care must be taken to ensure that the analog input signal never exceeds the supply rails by CLOCK more than 200 mV ...
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... The power dissipation during normal operation is 10.5 mW 1.5 µs and the conversion time is 2.3 µs, the AD7813 can then be said to dissipate 10.5 mW for 3.8 µs (worst-case) during each conversion cycle. If the throughput rate is 10 kSPS, the cycle time is 100 µ ...
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... AD7813 is powered down. The AD7813 is powered up again on the rising edge of the CONVST signal. The gated CONVST pulse will now remain high long enough for the AD7813 to fully power up, which takes about 1.5 µs. This is ensured by the internal CONVST signal, which will remain high for 1.5 µs. ...
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... ADC conversion result again. The parallel interface of the AD7813 is reset when BUSY goes logic high. This feature allows the AD7813 to be used as an 8-bit converter if the user only wishes to access the 8 MSBs of the conversion. Care must be taken to ensure that a read operation does not occur while BUSY is high ...
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... Port 2. Port 2 latches remain stable when the AD7813 is addressed, as they do not have to be turned around (set to 1) for data input as is the case for Port 0. 8051* AD0– ...
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... Thin Shrink Small Outline Package (RU-16) 0.201 (5.10) 0.193 (4.90 PIN 1 0.006 (0.15) 0.0433 0.002 (0.05) (1.10) MAX 8° 0.0118 (0.30) 0.0256 0° SEATING 0.0079 (0.20) (0.65) 0.0075 (0.19) PLANE BSC 0.0035 (0.090) –11– AD7813 0.325 (8.25) 0.195 (4.95) 0.300 (7.62) 0.115 (2.93) 0.015 (0.381) 0.008 (0.204) 0.0196 (0.50) x 45° 0.0099 (0.25) 0.0500 (1.27) 0.0160 (0.41) 0.028 (0.70) 0.020 (0.50) ...