SM5883A Audio 3rd-order ∑Δ D/A Converter OVERVIEW The SM5883A, fabricated using NPC’s Molybdenum-gate CMOS process, are D/A converter IC for digital audio, that provide all the basic converter functions in miniature 8-pin package. It features built-in 8-times oversampling digital filter, ∑Δ jitter-compensated D/A converter, and post-analog lowpass filter converter stages required for digital audio. It can sample at up to 96kHz for 16-bit input word length. FEATURES PINOUT ■ 2-channel stereo configuration (Top view) ■ 384fs system clock ■ Input format 3-wire serial, MSB first, rear-packed, 16-bit ■ 8-times oversampling digital filter DATA • 32dB stopband attenuation 1 8 LO • ±0.05dB passband ripple BCKI VDD ■ ∑Δ 2-channel D/A converter LRCI VSS • 3rd-order noise shaper CLK • 48fs oversampling operation 4 5 RO ■ 3rd-order post-analog lowpass filter ■ 4.5 to 5.5V supply voltage ■ Molybdenum-gate CMOS process ■ 8-pin SOP PACKAGE DIMENSIONS (Unit : mm) APPLICATIONS ■ Audio equipment ORDERING INFOMATION Device Package SM5883AS 8 pin SOP SEIKO NPC CORPORATION - 1 SM5883A BLOCK DIAGRAM DATA LRCI Input interface L Timing control CLK BCKI R Filter&attenuation operation block L R Noise shaper operation block 9 Level DEM DAC 9 Level DEM DAC + 9 Level DEM DAC - 9 Level DEM DAC - VDD VSS LO + RO PIN DESCRIPTION Number Name I/O Description 1 DATA I Serial data input 2 BCKI I Bit clock input 3 LRCI I 4 CLK I External clock input 5 RO O Right-channel analog output 6 VSS - Ground 7 VDD - Supply 8 LO O Left-channel analog output Sample rate (fs) clock input. Left-channel input when HIGH, and right-channel input when LOW. SEIKO NPC CORPORATION - 2 SM5883A SPECIFICATIONS Absolute Maximum Ratings VSS=0V Parameter Symbol Rating Unit Supply voltage range VDD -0.3 to 7.0 V *1 VIN VSS-0.3 to VDD+0.3 V TSTG -55 to 125 C PD 300 mW Symbol Rating Unit Supply voltage VDD 4.5 to 5.5 V Operating temperature TOPR -40 to 85 C Input voltage range Storage temperature range Power dissipation *1. All inputs Also it is applicable during supply switching. Recommended Operating Conditions VSS=0V Parameter DC Characteristics VDD=4.5V or 5.5V, VSS=0V, Ta=-40 to 85C Parameter Symbol Rating Condition Unit MIN TYP MAX - 12.5 25.0 mA Current consumption*1 IDD CLK HIGH-level input voltage VIH1 Clock input 0.7VDD - - V CLK LOW-level input voltage VIL1 Clock input - - 0.3VDD V CLK AC-coupled input voltage VINAC 0.7 - - VP-P VIH2 0.5VDD - - V VIL2 - - 0.2VDD V HIGH-level input voltage LOW-level input voltage *2 *2 CLK HIGH-level input current IIH VIN=VDD 20 62 170 µA CLK LOW-level input current IIL VIN=0V 20 62 170 µA ILH VIN=VDD - - 1.0 µA ILL VIN=0V - - 1.0 µA Input leakage current*2 *1. VDD=5V, CLK clock input frequency fCLK=16.9344MHz, no output load. Input data: NPC pattern. *2. Pins BCKI, DATA, LRCI SEIKO NPC CORPORATION - 3 SM5883A AC Digital Characteristics VDD=4.5 to 5.5V, VSS=0V, Ta=-40 to 85C System clock (CLK) Parameter Rating Symbol Unit MIN TYP MAX HIGH-level clock pulsewidth tCWH 13.15 - 125 ns LOW-level clock pulsewidth tCWL 13.15 - 125 ns Clock pulse cycle tXI 26.3 - 250 ns VIH1 CLK 0.5VDD tCWL VIL1 tCWH tXI Serial inputs (BCKI, DATA, LRCI) Parameter Rating Symbol Unit MIN TYP MAX BCKI HIGH-level pulsewidth tBCWH 50.0 - - ns BCKI LOW-level pulsewidth tBCWL 50.0 - - ns BCKI pulse cycle tBCY 1/(64fs) - - ns DATA setup time tDS 50.0 - - ns DATA hold time tDH 50.0 - - ns LRCI edge to first BCKI rising edge tLB 50.0 - - ns Last BCKI rising edge to LRCI edge tBL 50.0 - - ns BCKI 0.35VDD tBCWH tBCWL tBCY DATA 0.35VDD tDS tDH 0.35VDD LRCI tLB tBL SEIKO NPC CORPORATION - 4 SM5883A AC Analog Characteristics VSS=0V, VDD=5V, clock input frequency fCLK=16.9344MHz, Ta=25C Parameter Symbol Total harmonic distortion Rating Condition THD+N 1kHz, 0dB Unit MIN TYP MAX - 0.003 0.0120 % LSI output level VOUT1 1kHz, 0dB - 1.09 - Vrms Evaluation board output level VOUT2 1kHz, 0dB - 1.33 - Vrms Dynamic range D.R 1kHz, -60dB 90.4 96.4 - dB Signal-to-noise ratio S/N 1kHz, 0dB/-∞ 93.0 99.0 - dB Channel separation Ch.Sep 1kHz, -∞-0dB 88.5 94.5 - dB Note. These parameters are measured using the measurement block diagram (page 5) and the measurement circuit (page 6). AC analog measurement block diagram CLK 384fs BCLK LRCK(fs) fs=44.1kHz NF Corporation CD Player EVA.Filter3346A Evaluation Board DATA=16bit Lch Rch 100kΩ Input Impedance Serial Interface Adaptor corresponds to SIA-2322 Audio Precision System Two corresponds to SYS-2322 AC analog measurement conditions Parameter Total harmonic distortion Symbol THD+N 3346A left/right-channel selector Audio Precision System Two audio switch Not used Output level VOUT Dynamic range D.R D-RANGE Signal-to-noise ratio S/N Not used Channel separation Ch. Sep Not used analyzer with built-in filter 20kHz lowpass filter 22kHz lowpass filter A-WTD 20kHz lowpass filter Note. Pins LO and RO should have an output load of 10kΩ (min). SEIKO NPC CORPORATION - 5 ＣＬ Ｋ Ｌ ＲＣＩ ＢＣＫＩ EXT.CLK 3 1 6 4 INT.CLK 2 5 5 6 74HCU04 9 11 8 10 1 7 3 13 0. 01u ＶＤＤ RO VSS VDD 0. 01u 10p 16. 9344MHz 10p 2 X' t al 1M 4 12 14 CLK LRCI BCKI 0. 01u ＶＳＳ 100u 33u 33u 27k - + 33u 33u 27k - + 33k 33k 33u 33u + 3 2 5 + 6 NJM 2100 8 8 + NJM 2100 - + 68p 33k + - 68p 7 1 33u LO - + DATA - + ＤＡＴ Ａ - + ＳＭ ５８８3 AＳ - 22k 22k - 330p 330p 22k 22k 2. 2u + - 2. 2u + - 100k 100k 100 100p + 100 470u 100p 33k Ｒ ＯＵ Ｔ ＶＥＥ ＶＣＣ Ｌ ＯＵ Ｔ SM5883A AC analog measurement circuit SEIKO NPC CORPORATION - 6 0. 1u SM5883A Theoretical Filter Characteristics Overall characteristics Frequency band Parameter f @ fs=44.1kHz MIN TYP MAX 0 to 0.4535fs 0 to 20.0kHz -0.05 - +0.05 0.5465fs to 7.4535fs 24.1 to 328.7kHz 32 - - 0.4535fs 20.0kHz - -0.34 - Passband ripple Stopband attenuation Attenuation [dB] Built-in analog LPF compensation Overall frequency characteristic 0 Attenuation [dB] 10 20 30 40 50 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Frequency (fs) Passband characteristic Attenuation [dB] 0. 0 0. 2 0. 4 0. 6 0. 8 0. 000 0. 125 0. 250 0. 375 0. 4535 0. 500 Frequency (fs) SEIKO NPC CORPORATION - 7 SM5883A FUNCTIONAL DESCRIPTION System Clock (CLK) The system clock CLK frequency can be used 384fs clock 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. System Reset SM5883A incorporates 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 Output Muted RO System reset timing Audio Data Input (BCKI, DATA, LRCI) Input data format MSB first, 16bit serial, 2’s complement Input timing 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. Bit clock The bit clock frequency on BCKI is 32fs to 64fs inclusive. SEIKO NPC CORPORATION - 8 SM5883A TIMING DIAGRAMS 1/fs LRCI DATA Lch 31(max) MSB 16bit 15 14 LSB Rch 2 1 0 31(max) MSB 15 14 16bit LSB 2 1 0 BCKI TYPICAL APPLICATIONS Input Interface Example (fs=44.1 kHz) X'tal 16.9344MHz(384fs) 44.1kHz LRCI BCKI CKI SM5883A DATA Note that the output analog characteristics and other specifications are not guaranteed for a particular format or application circuit. SEIKO NPC CORPORATION - 9 SM5883A Please pay your attention to the following points at time of using the products shown in this document. 1. The products shown in this document (hereinafter ”Products”) are designed and manufactured to the generally accepted standards of reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and measurement equipment. The Products are not designed and manufactured to be used in any other special equipment requiring extremely high level of reliability and safety, such as aerospace equipment, nuclear power control equipment, medical equipment, transportation equipment, disaster prevention equipment, security equipment. The Products are not designed and manufactured to be used for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the Products. If you wish to use the Products in that apparatus, please contact our sales section in advance. In the event that the Products are used in such apparatus without our prior approval, we assume no responsibility whatsoever for any damages resulting from the use of that apparatus. 2. NPC reserves the right to change the specifications of the Products in order to improve the characteristics or reliability thereof. 3. The information described in this document is presented only as a guide for using the Products. No responsibility is assumed by us for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of the third parties. Then, we assume no responsibility whatsoever for any damages resulting from that infringements. 4. The constant of each circuit shown in this document is described as an example, and it is not guaranteed about its value of the mass production products. 5. In the case of that the Products in this document falls under the foreign exchange and foreign trade control law or other applicable laws and regulations, approval of the export to be based on those laws and regulations are necessary. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 1-9-9, Hatchobori, Chuo-ku, Tokyo 104-0032, Japan Telephone: +81-3-5541-6501 Facsimile: +81-3-5541-6510 http://www.npc.co.jp/ Email:[email protected] ND12002-E-00 2012.1 SEIKO NPC CORPORATION - 10