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| DECO SM588x series NIPPON PRECISION CIRCUITS INC. Audio 3rd-order D/A Converter OVERVIEW The DECO SM588x series, fabricated using NPC's Molybdenum-gate CMOS process, are D/A converter ICs for digital audio, that provide all the basic converter functions in miniature 8-pin packages. They each feature built-in 8-times oversampling digital filter, jitter-compensated D/A converter, and post-analog lowpass filter converter stages required for digital audio. They can sample at up to 96kHz for 16 or 24-bit input word length. A type with built-in deemphasis filter is also available for applications requiring deemphasis. FEATURES 3-wire Input I I 2-wire Input with Deemphasis Filter I I I I I I I I I 2-channel stereo configuration 256fs, 384fs, or 512fs system clock (applied by product / version) Input format 3-wire serial, MSB first, rear-packed 16 or 24-bit (applied by product / version) 8-times oversampling digital filter * 32 dB stopband attenuation * 0.05 dB passband ripple 2-channel D/A converter * 3rd-order noise shaper * Oversampling operation 3rd-order post-analog lowpass filter 4.5 to 5.5 V supply voltage 8-pin SOP Molybdenum-gate CMOS process I I I I I I I I 2-channel stereo configuration 256fs, 384fs, or 512fs system clock (applied by product / version) Input format 2-wire serial, MSB first, rear-packed 16 or 24-bit (applied by product / version) Deemphasis filter (fs = 44.1 kHz sample rate) 8-times oversampling digital filter * 32 dB stopband attenuation * 0.05 dB passband ripple 2-channel D/A converter * 3rd-order noise shaper * Oversampling operation 3rd-order post-analog lowpass filter 4.5 to 5.5 V supply voltage 8-pin SOP Molybdenum-gate CMOS process APPLICATIONS I Audio equipment PINOUTS 3-wire input DATA BCKI LRCI CLK 2-wire input with built-in deemphasis filter 8 LO VDD VSS DATA DEEM LRCI CLK 1 1 8 LO VDD VSS 588 588 4 5 RO 4 5 RO ORDERING INFORMATION Device SM5882AS SM5883AS SM5883BS SM5885CS NIPPON PRECISION CIRCUITS--1 8-pin SOP Package SM588x series PACKAGE DIMENSIONS (Unit : mm) Weight : 0.07g + 0.15 - 0.1 0.05 4.4 0.2 6.2 0.3 0.695typ 5.2 0.3 0.05 0.05 1.5 0.1 1.27 0.10 0.4 0.1 0.12 M 0.4 0.2 0 to 10 SERIES LINEUP Device SM5882AS SM5883AS SM5883BS SM5885CS Input length 16 16 16 24 Type 2-wire input 3-wire input 3-wire input 3-wire input Pin 2 function Deemphasis control Bit clock input Bit clock input Bit clock input Master clock 384fs 384fs 256fs 512fs NIPPON PRECISION CIRCUITS--2 SM588x series BLOCK DIAGRAM LRCI DATA Input interface L R BCKI* CLK Timing control Filter & attenuation operation block L R DEEM** Noise shaper operation block 9 Level DEM DAC 9 Level DEM DAC 9 Level DEM DAC 9 Level DEM DAC + - - + LO * : Not available for 2-wire input type ** : Not available for 3-wire input type VSS VDD RO PIN DESCRIPTION Number 1 2 3 4 5 6 7 8 1. 2. Name DATA BCKI1 DEEM2 LRCI CLK RO VSS VDD LO I/O I I I I I O - - O Serial data input Bit clock input Deemphasis ON/OFF control (44.1 kHz, ON when HIGH) Sample rate (fs) clock input. Left-channel input when HIGH, and right-channel input when LOW. External clock input Right-channel analog output Ground Supply Left-channel analog output Description 3-wire type 2-wire type with built-in deemphasis filter NIPPON PRECISION CIRCUITS--3 SM588x series SPECIFICATIONS Absolute Maximum Ratings VSS = 0 V Parameter Supply voltage range Input voltage range1 Storage temperature range Power dissipation 1. All inputs Also applicable during supply switching. Symbol VDD VIN TSTG PD Rating -0.3 to 7.0 VSS - 0.3 to VDD + 0.3 -55 to 125 300 Unit V V C mW Recommended Operating Conditions VSS = 0 V Parameter Supply voltage Operating temperature Symbol VDD TOPR Rating 4.5 to 5.5 -40 to 85 Unit V C DC Characteristics VDD = 4.5 to 5.5 V, VSS = 0 V, Ta = -40 to 85 C Rating Parameter Current consumption1 CLK HIGH-level input voltage CLK LOW-level input voltage CLK AC-coupled input voltage HIGH-level input voltage2 LOW-level input voltage2 CLK HIGH-level input current CLK LOW-level input current Input leakage current2 1. 2. Symbol IDD VIH1 VIL1 VINAC VIH2 VIL2 IIH IIL ILH ILL VIN = VDD VIN = 0 V VIN = VDD VIN = 0 V Clock input Clock input Condition min - 0.7VDD - 0.7 0.5VDD - 20 20 - - typ 12.5 - - - - - 62 62 - - max 25.0 - 0.3VDD - - 0.2VDD 170 170 1.0 1.0 mA V V Vp-p V V A A A A Unit VDD = 5 V, CLK clock input frequency fCLK = 16.9344 MHz (384fs type)/11.2896 MHz (256fs type)/22.5792MHz (512fs type), no output load. Input data: NPC pattern. Pins BCKI (3-wire type), DEEM (2-wire type with deemphasis filter), DATA, LRCI NIPPON PRECISION CIRCUITS--4 SM588x series AC Digital Characteristics VDD = 4.5 to 5.5 V, VSS = 0 V, Ta = -40 to 85 C System clock (CLK) 256fs type Rating Parameter HIGH-level clock pulsewidth LOW-level clock pulsewidth Clock pulse cycle Symbol min tCWH tCWL tXI 20.0 20.0 40.0 typ - - - max 125 125 250 ns ns ns Unit 384fs type Rating Parameter HIGH-level clock pulsewidth LOW-level clock pulsewidth Clock pulse cycle Symbol min tCWH tCWL tXI 13.15 13.15 26.3 typ - - - max 125 125 250 ns ns ns Unit 512fs type Rating Parameter HIGH-level clock pulsewidth LOW-level clock pulsewidth Clock pulse cycle Symbol min tCWH tCWL tXI 10 10 20 typ - - - max 125 125 250 ns ns ns Unit CLK t CWL t XI t CWH VIH1 0.5VDD VIL1 NIPPON PRECISION CIRCUITS--5 SM588x series Serial inputs 3-wire type (BCKI, DATA, LRCI) Parameter BCKI HIGH-level pulsewidth BCKI LOW-level pulsewidth BCKI pulse cycle DATA setup time DATA hold time LRCI edge to first BCKI rising edge Last BCKI rising edge to LRCI edge Symbol tBCWH tBCWL tBCY tDS tDH tLB tBL Rating min 50.0 50.0 1/(64fs) 50.0 50.0 50.0 50.0 typ - - - - - - - max - - - - - - - Unit ns ns ns ns ns ns ns BCKI t BCWH DATA t DS LRCI t LB t BL t DH t BCY t BCWL 0.35VDD 0.35VDD 0.35VDD 2-wire type (DATA, LRCI) Parameter DATA setup time DATA hold time LRCI edge to internal BCLK rising edge Symbol tDS tDH tLB 256fs/512fs 384fs Condition Rating min 50 50 1.5tXI 3.5tXI typ - - - - max - - 2.5tXI 4.5tXI Unit ns ns ns ns Internal BCLK t DS DATA t DH 0.35VDD 0.35VDD LRCI t LB 0.35VDD Control input (DEEM: 2-wire type) Parameter Rise time Fall time Symbol tr tf Rating min - - typ - - max 50 50 Unit ns ns tf tr 0.5VDD 0.2VDD DEEM 0.5VDD 0.2VDD 0.35VDD NIPPON PRECISION CIRCUITS--6 SM588x series AC Analog Characteristics 256fs type specification (SM5883BS) : VSS = 0 V, VDD = 5 V, 16-bit input type, crystal oscillator frequency fOSC = 11.2896 MHz, Ta = 25 C Rating Parameter Total harmonic distortion LSI output level Evaluation board output level Dynamic range Signal-to-noise ratio Channel separation Symbol THD + N VOUT1 VOUT2 D.R S/N Ch. Sep Condition min 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, -60 dB 1 kHz, 0dB/ - 1 kHz, - -0dB - - - 90.4 92.8 87.5 typ 0.0035 1.09 1.33 96.4 98.8 93.5 max 0.0130 - - - - - % Vrms Vrms dB dB dB Unit Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9). 384fs type specification (SM5882AS, SM5883AS) : VSS = 0 V, VDD = 5 V, DEEM = 0 V (2-wire type), 16-bit input type, crystal oscillator frequency fOSC = 16.9344 MHz, Ta = 25 C Rating Parameter Total harmonic distortion LSI output level Evaluation board output level Dynamic range Signal-to-noise ratio Channel separation Symbol THD + N VOUT1 VOUT2 D.R S/N Ch. Sep Condition min 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, -60 dB 1 kHz, 0dB/ - 1 kHz, - -0dB - - - 90.4 93.0 88.5 typ 0.003 1.09 1.33 96.4 99.0 94.5 max 0.0120 - - - - - % Vrms Vrms dB dB dB Unit Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9). 512fs type specification (SM5885CS) : VSS = 0 V, VDD = 5 V, 24-bit input type, crystal oscillator frequency fOSC = 22.5792MHz, Ta = 25 C Rating Parameter Total harmonic distortion LSI output level Evaluation board output level Dynamic range Signal-to-noise ratio Channel separation Symbol THD + N VOUT1 VOUT2 D.R S/N Ch. Sep Condition min 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, 0 dB 1 kHz, -60 dB 1 kHz, 0dB/ - 1 kHz, - -0dB - - - 92.0 92.8 87.5 typ 0.0035 1.09 1.33 98.0 98.8 93.5 max 0.0130 - - - - - % Vrms Vrms dB dB dB Unit Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9). NIPPON PRECISION CIRCUITS--7 SM588x series AC analog measurement block diagram CLK BCLK* LRCK(fs) fs= 44.1kHz *Not available for 2-wire type 256fs/384fs /512fs Evaluation Board NF Corporation CD Player EVA. Filter3346A Left DATA= 16/24bit Channel Right Channel 100k Input Impedance Serial Interface Adaptor corresponds to SIA-2322 Audio Precision System Two corresponds to SYS-2322 AC analog measurement conditions Parameter1 Total harmonic distortion Output level Dynamic range Signal-to-noise ratio Channel separation 1. Symbol THD + N VOUT D.R S/N Ch. Sep D-RANGE Not used Not used 22 kHz lowpass filter A-WTD 20 kHz lowpass filter 3346A left/right-channel selector switch Not used 20 kHz lowpass filter Audio Precision System Two audio analyzer with built-in filter Pins LO and RO should have an output load of 10 k (min). NIPPON PRECISION CIRCUITS--8 33k 68p SM5882/83/85 0.01u DATA BCKI /DEEM VDD VSS 33u 33u 27k -+ 33k 2 -+ RO + 3 + NJM 2100 22k LO 8 1 + 2.2u +- AC analog measurement circuit DATA BCKI/DEEM LRCI CLK LRCI - CLK 100 L ch. OUT 10 11 33u - 33u 22k 330p 12 13 8 4 3 7 33k 68p 0.01u 1M 9 VCC 6 5 100k 100p 470u - + 14 - 0.1u SM588x series 74HCU04 VEE 4 2 X'tal 10p 100u -+ -+ 33u 33u 27k -+ 1 0.01u 33k 5 22k Int. CLK 6 6 1 10p 33u - 330p 22k 3 VDD VSS NIPPON PRECISION CIRCUITS--9 Ext. CLK 16.9344MHz(384fs) 11.2896MHz(256fs) 22.5792MHz(512fs) 100k 100p 2 + 5 + NJM 2100 - 8 7 2.2u +- 100 R ch. OUT SM588x series Theoretical Filter Characteristics Overall characteristics Frequency band Parameter f Passband ripple Stopband attenuation Built-in analog LPF compensation 0 to 0.4535fs 0.5465fs to 7.4535fs 0.4535fs @ fs = 44.1 kHz 0 to 20.0 kHz 24.1 to 328.7 kHz 20.0 kHz min -0.05 32 - typ - - -0.34 max +0.05 - - Attenuation (dB) Overall frequency characteristic 0 10 20 Gain(dB) 30 40 50 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 (x fs) Passband characteristic 0.0 0.2 Gain(dB) 0.4 0.6 0.8 0.000 0.125 0.250 0.375 0.4535 0.500 (x fs) NIPPON PRECISION CIRCUITS--10 SM588x series 2-wire input, deemphasis ON overall characteristics Frequency band Parameter f Passband ripple Stopband attenuation Built-in analog LPF compensation 0 to 0.4535fs 0.5465fs to 7.4535fs 0.4535fs @ fs = 44.1 kHz 0 to 20.0 kHz 24.1 to 328.7 kHz 20.0 kHz min -0.09 36 - typ - - -0.34 max +0.23 - - Attenuation (dB) Deemphasis ON overall frequency characteristic 0 10 20 Gain(dB) 30 40 50 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 (x fs) Deemphasis ON passband characteristic 0 2 4 6 8 10 12 0.000 Gain(dB) 0.125 0.250 0.375 0.4535 0.500 (x fs) NIPPON PRECISION CIRCUITS--11 SM588x series FUNCTIONAL DESCRIPTION System Clock (CLK) The system clock CLK frequency varies with device within the series as shown below, where fs is the input frequency on LRCI. Note that the input clock accuracy and signal-to-noise ratio greatly influence the AC analog characteristics. The D/A converter operates at the speed shown in the following table. Table 1. System clock Device A version B, C version Master clock 384fs 256/512fs DAC oversampling operation 48fs 32fs System Reset The SM588x series devices incorporate a built-in power-ON reset circuit for system reset. When power is applied, the internal arithmetic operation and output timing counter are reset, and then reset again and timing synchronized to the external input on the next LRCI rising edge. After system reset, the outputs are muted until the 9th rising of LRCI when output muting is released. When the timing is reset, the PWM outputs may generate an output noise. An external muting circuit may be required to prevent this output noise. VDD 1 2 3 9 10 LRCI Internal Reset LO RO Output Muted Figure 1. System reset timing NIPPON PRECISION CIRCUITS--12 SM588x series Audio Data Input Input data format (DATA) The input data has a format that varies with device within the series, as shown below. Table 2. Input format Device SM5882/SM58831 SM58852 1. 2. Input length 16 bits 24 bits Format MSB first, bit serial, rear-packed, 2s complement The 2-wire type supports bit clocks of 48fs (384fs) or 64fs (256fs/512fs) only. The 3-wire type supports bit clocks of up to 64fs. Input timing 3-wire input (DATA, LRCI, BCKI) Serial data bits on DATA are read into the SIPO register (serial-to-parallel converter register) on the rising edge of the bit clock BCKI, and then converted to parallel data. The arithmetic operation and output timing are independent of the input timing. Accordingly, after a reset, as long as the clock frequency ratio between LRCI and the system clock CLK is maintained, phase differences between LRCI, BCKI and the system clock CLK do not affect the functional operation. Also, any jitter present on the data input clock does not appear as output pulse jitter. 2-wire input (DATA, LRCI) Serial data bits on DATA are read into the SIPO register (serial-to-parallel converter register) on the rising edge of an internally generated bit clock, and then converted to parallel data. Deemphasis Filter (DEEM: 2-wire input) The 2-wire type with built-in digital deemphasis filter is designed to operate at 44.1 kHz. Deemphasis is ON when DEEM is HIGH, and OFF when DEEM is LOW. NIPPON PRECISION CIRCUITS--13 SM588x series TIMING DIAGRAMS 2-wire Input Type with Deemphasis Filter Built-in 1/fs Left Channel 16 or 24 bit MSB LSB Right Channel MSB 16 or 24 bit LSB DATA Internal bit clock (Generated by system clock) LRCI 24 bit clock (384fs type) 32 bit clock (256fs/512fs type) 24 bit clock (384fs type) 32 bit clock (256fs/512fs type) 3-wire Input Type 1/fs Left Channel 16 or 24 bit MSB LSB Right Channel MSB 16 or 24 bit LSB DATA BCKI (64fs MAX) LRCI NIPPON PRECISION CIRCUITS--14 SM588x series TYPICAL APPLICATIONS Input Interface Examples (fs = 44.1kHz) X'tal 16.9344MHz (384fs) 44.1kHz CKI X'tal 16.9344MHz (384fs) 44.1kHz CKI LRCI BCKI DATA LRCI SM5882/83/85 DATA SM5882/83/85 3-wire input type System clock 384fs 2-wire input type System clock 384fs X'tal 11.2896MHz (256fs) 44.1kHz CKI X'tal 11.2896MHz (256fs) 44.1kHz CKI LRCI BCKI DATA LRCI SM5882/83/85 DATA SM5882/83/85 3-wire input type System clock 256fs 2-wire input type System clock 256fs X'tal 22.5792MHz (512fs) 44.1kHz CKI X'tal 22.5792MHz (512fs) 44.1kHz CKI LRCI BCKI DATA LRCI SM5882/83/85 DATA SM5882/83/85 3-wire input type System clock 512fs 2-wire input type System clock 512fs Note that the output analog characteristics and other specifications are not guaranteed for a particular format or application circuit. NIPPON PRECISION CIRCUITS--15 SM588x series NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. 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. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: +81-3-3642-6661 Facsimile: +81-3-3642-6698 http://www.npc.co.jp/ Email: sales@npc.co.jp NC9720GE 2000.11 NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS--16 |
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