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AD1859JRS Folha de dados(PDF) 5 Page - Analog Devices |
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AD1859JRS Folha de dados(HTML) 5 Page - Analog Devices |
5 / 16 page AD1859 REV. A –5– Serial Control Port Interface Pin Name Number I/O Description CDATA 20 I Serial control input, MSB first, containing 8 bits of unsigned data per channel. Used for specifying channel specific attenuation and mute. CCLK 19 I Control clock input for control data. Control input data must be valid on the rising edge of CCLK. CCLK may be continu- ous or gated. CLATCH 21 I Latch input for control data. This input is rising edge sensitive. Digital Audio Serial Input Interface Pin Name Number I/O Description SDATA 12 I Serial input, MSB first, contain- ing two channels of 16 or 18 bits of twos complement data per channel. BCLK 14 I Bit clock input for input data. Need not run continuously; may be gated or used in a burst fashion. LRCLK 13 I Left/right clock input for input data. Must run continuously. IDPM0 9 I Input serial data port mode control zero. With IDPM1, defines one of four serial input modes. IDPM1 10 I Input serial data port mode con- trol one. With IDPM0, defines one of four serial input modes. 18/16 8 I 18-bit or 16-bit input data mode control. Connect this signal HI for 18-bit input mode, LO for 16-bit input mode. Gain Error With a near full-scale input, the ratio of actual output to ex- pected output, expressed as a percentage. Interchannel Gain Mismatch With identical near full-scale inputs, the ratio of outputs of the two stereo channels, expressed in decibels. Gain Drift Change in response to a near full-scale input with a change in temperature, expressed as parts-per-million (ppm) per °C. Crosstalk (EIAJ method) Ratio of response on one channel with a zero input to a full-scale 1 kHz sine-wave input on the other channel, expressed in decibels. Interchannel Phase Deviation Difference in output sampling times between stereo channels, expressed as a phase difference in degrees between 1 kHz inputs. Power Supply Rejection With zero input, signal present at the output when a 300 mV p-p signal is applied to power supply pins, expressed in decibels of full scale. Group Delay Intuitively, the time interval required for an input pulse to ap- pear at the converter’s output, expressed in seconds (s). More precisely, the derivative of radian phase with respect to radian frequency at a given frequency. Group Delay Variation The difference in group delays at different input frequencies. Specified as the difference between the largest and the smallest group delays in the passband, expressed in microseconds ( µs). DEFINITIONS Dynamic Range The ratio of a full-scale output signal to the integrated output noise in the passband (0 to 20 kHz), expressed in decibels (dB). Dynamic range is measured with a –60 dB input signal and is equal to (S/[THD+N]) + 60 dB. Note that spurious harmonics are below the noise with a –60 dB input, so the noise level es- tablishes the dynamic range. This measurement technique is consistent with the recommendations of the Audio Engineering Society (AES17-1991) and the Electronics Industries Association of Japan (EIAJ CP-307). Total Harmonic Distortion + Noise (THD+N) The ratio of the root-mean-square (rms) value of a full-scale fundamental input signal to the rms sum of all other spectral components in the passband, expressed in decibels (dB) and percentage. Passband The region of the frequency spectrum unaffected by the attenu- ation of the digital interpolation filter. Passband Ripple The peak-to-peak variation in amplitude response from equal- amplitude input signal frequencies within the passband, ex- pressed in decibels. Stopband The region of the frequency spectrum attenuated by the digi- tal interpolation filter to the degree specified by “stopband attenuation.” PIN DESCRIPTIONS |
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