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AD1870AR-REEL Datasheet(PDF) 5 Page - Analog Devices |
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AD1870AR-REEL Datasheet(HTML) 5 Page - Analog Devices |
5 / 20 page AD1870 REV. A –5– PIN FUNCTION DESCRIPTIONS Input/ Pin Pin Output Name Description 1 I/O L RCK Left/ Right Clock 2 I/O WCLK Word Clock 3 I/O BCLK Bit Clock 4I DVDD1 5 V Digital Supply 5 I DGND1 Digital Ground 6 I RDEDGE Read Edge Polarity Select 7I S/ M Slave/ Master Select 8 I 384/ 256 Clock Mode 9I AVDD 5 V Analog Supply 10 I VINL Left Channel Input 11 O CAPL1 Left External Filter Capacitor 1 12 O CAPL2 Left External Filter Capacitor 2 13 I AGNDL Left Analog Ground 14 O VREFL Left Reference Voltage Output 15 O VREFR Right Reference Voltage Output 16 I AGNDR Right Analog Ground 17 O CAPR2 Right External Filter Capacitor 2 18 O CAPR1 Right External Filter Capacitor 1 19 I VINR Right Channel Input 20 I AGND Analog Ground 21 I R LJUST Right/ Left Justify 22 I MSBDLY Delay MSB One BCLK Period 23 I RESET Reset 24 I DGND2 Digital Ground 25 I DVDD2 5 V Digital Supply 26 O SOUT Serial Data Output 27 O TAG Serial Overrange Output 28 I CLKIN Master Clock DEFINITIONS Dynamic Range The ratio of a full-scale output signal to the integrated output noise in the pass band (20 Hz 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 establishes the dynamic range. The dynamic range is specified with and with- out an A-Weight filter applied. Signal to Total Harmonic Distortion + Noise (S/(THD + N)) The ratio of the root-mean-square (rms) value of the fundamen- tal input signal to the rms sum of all other spectral components in the pass band, expressed in decibels. Signal to Total Harmonic Distortion (S/THD) The ratio of the rms value of the fundamental input signal to the rms sum of all harmonically related spectral components in the pass band, expressed in decibels. Pass Band The region of the frequency spectrum unaffected by the attenu- ation of the digital decimator’s filter. Pass-Band Ripple The peak-to-peak variation in amplitude response from equal- amplitude input signal frequencies within the pass band, expressed in decibels. Stop Band The region of the frequency spectrum attenuated by the digi- tal decimator’s filter to the degree specified by stop-band attenuation. Gain Error With a near full-scale input, the ratio of actual output to expected 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. Midscale Offset Error Output response to a midscale dc input, expressed in least significant bits (LSBs). Midscale Drift Change in midscale offset error with a change in temperature, expressed as parts-per-million (ppm) per °C. Crosstalk (EIAJ Method) Ratio of response on one channel with a grounded input to a full-scale 1 kHz sine wave input on the other channel, expressed in decibels. Power Supply Rejection With no analog input, signal present at the output when a 300 mV p-p signal is applied to the power supply pins, ex- pressed in decibels of full scale. Group Delay Intuitively, the time interval required for an input pulse to appear at the converter’s output, expressed in milliseconds (ms). 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 smallest group delays in the pass band, expressed in microseconds ( µs). |
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