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AD1890 датащи(PDF) 5 Page - Analog Devices |
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AD1890 датащи(HTML) 5 Page - Analog Devices |
5 / 20 page AD1890/AD1891 REV. 0 –5– AD1890/AD1891 PIN LIST Serial Input Interface Pin Name Number I/O Description DATA_I 3 I Serial input, MSB first, containing two channels of 4- to 20-bits of twos-complement data per channel. AD1891 ONLY: Maximum of 16 data bits per channel; additional bits ignored. BCLK_I 4 I Bit clock input for input data. WCLK_I 5 I Word clock input for input data. This input is rising edge sensitive. (Not required in LR input data clock triggered mode [TRGLR_I = HI].) LR_I 6 I Left/right clock input for input data. Must run continuously. Serial Output Interface Pin Name Number I/O Description DATA_O 23 O Serial output, MSB first, containing two channels of 4- to 24-bits of twos-complement data per channel. BCLK_O 26 I Bit clock input for output data. WCLK_O 25 I Word clock input for output data. This input is rising edge sensitive. (Not required in LR output data clock triggered mode [TRGLR_O = HI].) LR_O 24 I Left/right clock input for output data. Must run continuously. Input Control Signals Pin Name Number I/O Description BKPOL_I 10 I Bit clock polarity. LO: Normal mode. Input data is sampled on rising edges of BCLK_I. HI: Inverted mode. Input data is sampled on falling edges of BCLK_I. TRGLR_I 11 I Trigger on LR_I. HI: Changes in LR_I indicate beginning 1 of valid input data. LO: Rising edge of WCLK_I indicates beginning of valid input data. MSBDLY_I 12 I MSB delay. HI: Input data is delayed one BCLK_I after either LR_I (TRGLR_I = HI) or WCLK_I (TRGLR_I = LO) indicates the beginning of valid input data. Included for I 2S data format compatibility. LO: No delay. NOTE 1The beginning of valid data will be delayed by one BLCK_I if MSBDEL_I is selected (HI). Group Delay Intuitively, the time interval required for a full-level input pulse to appear at the converter’s output, at full level, expressed in milliseconds (ms). More precisely, the derivative of radian phase with respect to radian frequency at a given frequency. Transport Delay The time interval between when an impulse is applied to the converters input and when the output starts to be affected by this impulse, expressed in milliseconds (ms). Transport delay is independent of frequency. DEFINITIONS Dynamic Range The ratio of a near full-scale input signal to the integrated noise in the passband (0 to ≈20 kHz), expressed in decibels (dB). Dy- namic range is measured with a –60 dB input signal and “60 dB” arithmetically added to the result. Total Harmonic Distortion + Noise Total Harmonic Distortion plus Noise (THD+N) is defined as the ratio of the square root of the sum of the squares of the val- ues of the harmonics and noise to the rms value of a sinusoidal input signal. It is usually expressed in percent (%) or decibels. Interchannel Phase Deviation Difference in input sampling times between stereo channels, ex- pressed as a phase difference in degrees between 1 kHz inputs. |
Аналогичный номер детали - AD1890 |
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Аналогичное описание - AD1890 |
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