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AD6600 Datasheet(PDF) 10 Page - Analog Devices |
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AD6600 Datasheet(HTML) 10 Page - Analog Devices |
10 / 24 page REV. 0 AD6600 –10– DEFINITIONS OF SPECIFICATIONS Analog Bandwidth The analog input frequency at which the spectral power of the fundamental frequency (as determined by the FFT analysis) is reduced by 3 dB. The bandwidth is determined by the internal track-and-hold when the filter node is resonated. Aperture Delay The delay between the 50% point of the rising edge of the ENCODE command and the instant at which the analog input- is sampled. Aperture Uncertainty (Jitter) The sample-to-sample variation in aperture delay. Attenuator 3OIP The third order intercept point of the front end of the AD6600. It is the point at which the third order products would theoreti- cally intercept the input signal level if the input level could increase without bounds. This is measured using the ADC within the AD6600 while the input is stimulated with dual tones in the minimum attenuation (i.e., maximum gain) range. Channel Isolation The amount of signal leakage from one channel to the next when one channel is driven with a full-scale input, and the other channel is swept from –20 dBFS to –90 dBFS with a frequency offset. The leakage is measured on the side with the smaller signal. Differential Analog Input Resistance, Differential Analog Input Capacitance and Differential Analog Input Impedance The real and complex impedances measured at each analog input port. The resistance is measured statically and the capaci- tance and differential input impedances are measured with a network analyzer. Differential Analog Input Voltage Range The peak-to-peak differential voltage that must be applied to the converter to generate a full-scale response. Peak differential voltage is computed by observing the voltage on a single pin and subtracting the voltage from the other pin, which is 180 degrees out of phase. Peak-to-peak differential is computed by rotating the inputs phase 180 degrees and taking the peak measurement again. The difference is then computed between both peak measurements. Differential Nonlinearity The deviation of any code width from an ideal 1 LSB step. Differential Resonant Port Resistance The resistance shunted across the resonant port (nominally 630 Ω). Used to determine the filter bandwidth and gain of that stage. Encode Pulsewidth/Duty Cycle Pulsewidth high is the minimum amount of time that the ENCODE pulse should be left in logic “1” state to achieve rated performance; pulsewidth low is the minimum time ENCODE pulse should be left in low state. See timing implications of changing tENCH in text. At a given clock rate, these specifications define an acceptable Encode duty cycle. Full-Scale Gain Tolerance Unit-to-unit variation in full-scale input power. Full-Scale Input Power Expressed in dBm. Computed using the following equation: Power V Z FULL SCALE FULL SCALE rms INPUT = 10 0 001 2 log . Gain Matching (Input A:B) Variation in full-scale power between A and B inputs. Harmonic Distortion, 2nd The ratio of the rms signal amplitude to the rms value of the second harmonic component, reported in dBc. Harmonic Distortion, 3rd The ratio of the rms signal amplitude to the rms value of the third harmonic component, reported in dBc. Integral Nonlinearity The deviation of the transfer function from a reference line measured in fractions of 1 LSB using a “best straight line” determined by a least square curve fit. Minimum Conversion Rate The encode rate at which the SNR of the lowest analog signal fre- quency drops by no more than 3 dB below the guaranteed limit. Maximum Conversion Rate The encode rate at which parametric testing is performed. Noise (For Any Range Within the ADC) VZ NOISE FS SNR Signal dBm dBc dBFS =× × −− 0 001 10 10 . where: Z is the input impedance, FS is the full-scale of the device for the frequency in question, SNR is the value for the particular input level, Signal is the signal level within the ADC reported in dB below full scale. This value includes both thermal and quanti- zation noise. Range-Range Gain Tolerance The gain error in the RSSI attenuator ladder from one range to the next. Range-Range Phase Tolerance The phase error in the RSSI attenuator ladder from one range to the next. Differential Resonant Port Capacitance The capacitance between the two resonant pins. Used to deter- mine filter bandwidth and resonant frequency. |
Similar Part No. - AD6600_15 |
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Similar Description - AD6600_15 |
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