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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AD73360 Datenblatt(PDF) 10 Page - Analog Devices |
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AD73360 Datenblatt(HTML) 10 Page - Analog Devices |
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10 / 35 page  REV. A AD73360 –10– TERMINOLOGY Absolute Gain Absolute gain is a measure of converter gain for a known signal. Absolute gain is measured (differentially) with a 1 kHz sine wave at 0 dBm0 for each ADC. The absolute gain specification is used for gain tracking error specification. Crosstalk Crosstalk is due to coupling of signals from a given channel to an adjacent channel. It is defined as the ratio of the amplitude of the coupled signal to the amplitude of the input signal. Crosstalk is expressed in dB. Gain Tracking Error Gain tracking error measures changes in converter output for different signal levels relative to an absolute signal level. The absolute signal level is 0 dBm0 (equal to absolute gain) at 1 kHz for each ADC. Gain tracking error at 0 dBm0 (ADC) is 0 dB by definition. Group Delay Group Delay is defined as the derivative of radian phase with respect to radian frequency, dø(f)/df. Group delay is a measure of average delay of a system as a function of frequency. A linear system with a constant group delay has a linear phase response. The deviation of group delay from a constant indicates the de- gree of nonlinear phase response of the system. Idle Channel Noise Idle channel noise is defined as the total signal energy measured at the output of the device when the input is grounded (mea- sured in the frequency range 0 Hz–4 kHz). Intermodulation Distortion With inputs consisting of sine waves at two frequencies, fa and fb, any active device with nonlinearities will create distortion products at sum and difference frequencies of mfa ± nfb where m, n = 0, 1, 2, 3, etc. Intermodulation terms are those for which neither m nor n are equal to zero. For final testing, the second order terms include (fa + fb) and (fa – fb), while the third order terms include (2fa + fb), (2fa – fb), (fa + 2fb) and (fa – 2fb). Power Supply Rejection Power supply rejection measures the susceptibility of a device to noise on the power supply. Power supply rejection is measured by modulating the power supply with a sine wave and measuring the noise at the output (relative to 0 dB). Sample Rate The sample rate is the rate at which each ADC updates its out- put register. It is set relative to the DMCLK and the program- mable sample rate setting. SNR + THD Signal-to-noise ratio plus harmonic distortion is defined to be the ratio of the rms value of the measured input signal to the rms sum of all other spectral components in a given frequency range, including harmonics but excluding dc. ABBREVIATIONS ADC Analog-to-Digital Converter. BW Bandwidth. CRx A Control Register where x is a placeholder for an alphabetic character (A–E). There are eight read/write control registers on the AD73360— designated CRA through CRE. CRx:n A bit position, where n is a placeholder for a numeric character (0–7), within a control regis- ter; where x is a placeholder for an alphabetic character (A–E). Position 7 represents the MSB and Position 0 represents the LSB. DMCLK Device (Internal) Master Clock. This is the internal master clock resulting from the external master clock (MCLK) being divided by the on- chip master clock divider. FSLB Frame Sync Loop-Back—where the SDOFS of the final device in a cascade is connected to the RFS and TFS of the DSP and the SDIFS of first device in the cascade. Data input and output occur simultaneously. In the case of nonFSLB, SDOFS and SDO are connected to the Rx Port of the DSP while SDIFS and SDI are connected to the Tx Port. PGA Programmable Gain Amplifier. SC Switched Capacitor. SNR Signal-to-Noise Ratio. SPORT Serial Port. THD Total Harmonic Distortion. VBW Voice Bandwidth. |
Ähnliche Teilenummer - AD73360_15 |
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Ähnliche Beschreibung - AD73360_15 |
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