SM5876AM Nippon Precision Circuits Inc, SM5876AM Datasheet
SM5876AM
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SM5876AM Summary of contents
Page 1
... LSI for CD-ROM digital audio reproduc- tion equipment. It incorporates an 8-times oversam- pling digital filter, deemphasis filter, attenuator, and soft mute circuits built-in., using NPC’s Molybde- num-gate CMOS technology. The SM5876AM operates from a 2.7 to 5.5 V supply, and is available in 24-pin SSOPs. FEATURES System clock • 768fs (33.8688MHz) • ...
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... DVDD 8 LRCI Ip 9 TSTN AVDDL 12 LON O 13 AVSS 14 RON O SM5876AM LRCI BCKI DI Input interface L R Filter & attenuation operation block Noise shaper operation block R LON AVSS RON Description Microcontroller control latch clock input 768fs/384fs clock select. 768fs when HIGH, and 384fs when LOW. ...
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... Parameter Supply voltage range Supply voltage variation Operating temperature range SM5876AM Description Right-channel analog supply pin Right-channel analog output (+) Crystal oscillator supply pin Crystal oscillator or external clock input pin Crystal oscillator output pin Crystal oscillator ground pin Infinity-zero detector output (analog mute control) Reset pin ...
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... V, CKSL = HIGH (768fs), XTI clock input frequency Pins MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT. 3. Pins LO, LON, RO, RON,MUTEO operation Parameter 1 DVDD digital supply current 1 XVDD system clock supply current 1 AVDD analog supply current XTI HIGH-level input voltage SM5876AM = DDL DDR Symbol ...
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... operation CKSL = LOW (384fs system clock) a System clock (XTI) Crystal Oscillator Parameter Oscillator frequency External clock input Parameter HIGH-level clock pulsewidth LOW-level clock pulsewidth Clock pulse cycle SM5876AM Symbol Condition V Clock input IL1 V INAC V IH2 V IL2 0.5 mA OHA 0.5 mA OLA 0.5 mA ...
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... Serial input (BCKI, DI, LRCI) Parameter BCKI HIGH-level pulsewidth BCKI LOW-level pulsewidth BCKI pulse cycle DI setup time DI hold time Last BCKI rising edge to LRCI edge LRCI edge to first BCKI rising edge Serial input timing BCKI DI LRCI SM5876AM t CWH CWL t XI Symbol t BCWH t BCWL t BCY ...
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... MLEN hold time MLEN level pulsewidth Rise time Fall time Control input timing MCK MDT MLEN MCK MDT MLEN Reset Input (RSTN) Parameter RSTN LOW-level pulsewidth after supply rising edge SM5876AM Symbol min t 140 MCWH t 140 MCWL t 280 MCY t 100 MDS ...
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... Overall frequency characteristic (deemphasis OFF 0.0 1.0 Passband characteristic (deemphasis OFF) 0.0 0.2 0.4 0.6 0.8 0.000 SM5876AM Frequency band 44.1 kHz 0 to 20.0 kHz 24.1 to 328.7 kHz 0.4535fs 20.0 kHz 2.0 3.0 4.0 Frequency (fs) 0.125 0.250 Frequency (fs) Attenuation (dB) min typ max 0 ...
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... Built-in analog LPF compensation Overall frequency characteristic (deemphasis ON 0.0 1.0 Passband characteristic (deemphasis ON 0.000 SM5876AM Frequency band 44.1 kHz 0 to 0.4535fs 0 to 20.0 kHz 24.1 to 328.7 kHz 0.4535fs 20.0 kHz 2.0 3.0 4.0 Frequency (fs) 0.125 0.250 Frequency (fs) Attenuation (dB) min typ max 0.09 – ...
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... LSI output level Evaluation board output level Dynamic range 2 Signal-to-noise ratio Channel separation 1. The LSI output level = 0.3058AV Vrms Signal-to-noise is measured following a device reset, with DATA = 0 (DI = LOW). Under these conditions, the signal-to-noise ratio includes noise-shaper noise. SM5876AM = 16.9344 MHz, T OSC Symbol ...
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... DATA= 16bit Measurement conditions 1 Parameter Total harmonic distortion Output level Dynamic range Signal-to-noise ratio Channel separation 1. Pins LO and RO should have an output load (min). SM5876AM Left Channel Evaluation L/R Channel Board Selector Right Channel 10k Input Impedance NF Corporation 3346A 3346A left/right-channel selector ...
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... Measurement circuit SM5876AM AVSS LON AVDDL RON LO AVDDR TSTN RO LRCI XVDD DVDD XTI DI XTO BCKI XVSS DVSS MUTEO CKO RSTN CKSL MDT MLEN MCK NIPPON PRECISION CIRCUITS—12 ...
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... Mute is released on the 9th LRCI rising edge after RSTN goes HIGH. During this cycle, the timing reset can cause output noise to be generated. SM5876AM Note that the input clock accuracy and signal-to- noise ratio greatly influence the AC analog character- istics ...
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... Infinity-Zero Detector (analog mute control) Output (MUTEO) The SM5876AM outputs an infinity-zero detection output signal under the following circumstances. 1. When an infinity-zero occurs on both the left and right channels. 2. When an infinity-zero occurs in the input data for the channel set by the output mode setting. ...
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... When an attenuation value is set, the output gain decreases from the value set by the attenuation data until the gain is . Similarly for mute release, the output gain increases from the current value until the gain is 0 dB. Soft mute operation is shown in figure 3. SM5876AM PL3 Left-channel output Right-channel output 0 Mute 1 ...
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... BCKI, LRCI) Left Channel DI MSB BCKI (64fs MAX) LRCI (MDT, MCK, MLEN) L channel Attenuation Data MCK MDATA LSB MLEN SM5876AM 1/fs 16 bit Right Channel LSB R channel Attenuation Data MSB LSB Data is recognized on the rising edge of MLEN. 16 bit MSB LSB Output ...
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... Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. SM5876AM XTI CKO 44.1kHz ...