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| MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER DESCRIPTION The M62356P is an integrated circuit semiconductor of C-MOS structure with 8 channels of built-in D-A converters. The input data is a easy-to-use 3-wires serial data transfer method and it is able to cascading serial use with Do terminal. PIN CONFIGURATION (TOP VIEW) LD CLK 1 2 3 4 5 6 7 8 18 17 16 15 14 13 12 11 10 R VDD DO Ao4 Ao3 Ao2 Ao1 VrefU1 VrefU2 FEATURES *Digital data transfer format 3-wires serial data transfer method *Output voltage range 0V to 12V *Short setting time *D-A converter high level reference voltage is possess two input terminal then two reference voltage is possible to input. Digital voltage supply........................VDD=5V10% DI Ao5 Ao6 Ao7 Ao8 GND VrefL 9 APPLICATION Conversion from digital control data to analog control data for home-use and industrial equipment. Automatic adjustment by combination with EEPROM and microcomputer(replacement of conventional half-fixed resistor). Signal gain control of DISPLAY-MONITOR or CTV. Outline 18P4 BLOCK DIAGRAM R VDD Do Ao4 Ao3 Ao2 Ao1 VrefU1 VrefU2 18 17 16 15 14 13 12 11 10 D-A D-A D-A D-A CONVERTER CONVERTER CONVERTER CONVERTER 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH 8-BIT LATCH D-A D-A D-A D-A CONVERTER CONVERTER CONVERTER CONVERTER 1 LD 2 CLK 3 DI 4 Ao5 5 Ao6 6 Ao7 7 Ao8 8 GND 9 VrefL MITSUBISHI ELECTRIC ( 1/6) MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER EXPLANATION OF TERMINALS Pin No. 3 16 2 1 17 11 8 10 9 18 12 13 14 15 4 5 6 7 Symbol DI DO CLK LD VDD VrefU1 GND VrefU2 VrefL R Ao1 Ao2 Ao3 Ao4 Ao5 Ao6 Ao7 Ao8 Function Serial data input terminal Serial data output terminal Serial clock input terminal LD terminal input high level than latch circuit data load Digital power supply terminal D-A converter upper reference voltage input terminal(CH1~CH4) GND D-A converter upper reference voltage input terminal(CH5~CH8) D-A converter lower reference voltage input terminal Reset terminal 8-bit D-A converter output terminal ABSOLUTE MAXIMUM RATINGS(Ta=25C, unless otherwise noted) Symbol VDD VrefU VIN IDO IAO Topr Tstg Parameter Supply voltage D-A converter upper reference voltage Input voltage Output current D-A converter output current Operating temperature Storage temperature Conditions Ratings -0.3~7.0 12.5 -0.3~Vcc+0.3 -5~+5 10 -20~+75 -40~+125 Unit V V V mA A C C RECOMMENDED OPERATING CONDITIONS *Digital voltage supply VDD 5V10% ELECTRICAL CHARACTERISTICS Digital part(Ta=25C,VDD=5V, unless otherwise noted) Symbol VDD IDD VIL VIH VOL VOH Parameter Supply voltage Circuit current Input low voltage Input high voltage Output low voltage Output high voltage CLK=1MHz operation Test conditions Min. 4.5 Limits Typ. Max. 5.5 1 0.2VDD 0.8VDD IOL=1.0mA IOH=-400A VDD-0.4 0.4 Unit V mA V V V V MITSUBISHI ELECTRIC ( 2/6) MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER Analog part(VDD=+5V,VrefU=12V,VrefL=0V,Ta=-20C~+85C, unless otherwise noted) Symbol Parameter D-A converter upper reference input current max D-A converter upper reference voltage range D-A converter lower reference voltage range D-A converter output voltage range Differential nonlinearity Nonrineality Guaranteed monotonic VrefL +2.5LSB Test conditions All ch`s set up at 107/256 Min. Limits Typ. 1.2 Max. 2.5 Unit mA IrefU VrefU VrefL VAO DNL NL 3.5 12 1.5 VrefU -1.5LSB 1.0 1.5 V V V LSB LSB TIMING CHART (MODEL) R MSB DI D11 D10 D9 LSB D0 CLK LD AO Input data is carried out LD signal Low besides CLK signal positive edge. CLK,LD is keep generally High level. MITSUBISHI ELECTRIC ( 3/6) MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER AC CHARACTERISTICS(Ta=25C,VDD=+5V,VrefU=12V,VrefL=0V, unless otherwise noted) Symbol tCKL tCKH tCR tCF tDCH tCHD tCHL tLDC tLDH tDO tLDD Parameter Clock "L"pulse width Clock "H"pulse width Clock rise time Clock fall time Data set up time Data hold time LD set up time LD hold time LD "H" pulse width Data output delay time Data output setting time CL100pF Without load Test conditions Min 200 200 Limits Typ Max Unit ns ns ns ns ns ns ns ns ns ns s 200 200 60 100 200 100 100 70 350 20 TIMING CHART tCR tCKH tCF CLK tCKL DI tDCH tCHD tLDH tCHL LD tLDC tLDD D-A OUTPUT tDO DO OUTPUT MITSUBISHI ELECTRIC ( 4 /6) MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER DIGITAL FORMAT 1.12-bit shift register To set DAC,12-bit data is input in series at CLK signal"positive" edges while the LD pin status is "Low". *12 bit serial data DATA (LSB) 2.Decoder(DAC select data) One DAC circuit is selected from among 8 circuits according to the DAC select data(4-bits:D8,D9,D11 and D14). *DAC select data D8 0 0 D9 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 (MSB) D2 0 0 0 0 1 1 1 D10 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D11 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 DAC selection Don`t care Ao1 selection Ao2 selection Ao3 selection Ao4 selection Ao5 selection Ao6 selection Ao7 selection Ao8 selection Don`t care Don`t care Don`t care Don`t care Don`t care Don`t care Don`t care CK 0 0 0 *Data assignment DAC select data 0 0 0 1 1 DAC set up data 1 1 1 1 1 1 (LSB) (MSB) *DAC set up data (LSB) D0 0 1 0 1 0 1 0 D1 0 0 1 1 1 1 D3 0 0 0 0 1 1 2 D4 0 0 0 0 1 1 D5 0 0 0 0 1 1 6 7 D6 0 0 0 0 1 1 D7 0 0 0 0 1 1 Output voltage 1/256*(VrefU-VrefL)+VrefL 2/256*(VrefU-VrefL)+VrefL 3/256*(VrefU-VrefL)+VrefL 4/256*(VrefU-VrefL)+VrefL 255/256*(VrefU-VrefL)+VrefL 256/256*(VrefU-VrefL)+VrefL Ao= 2 X D0 + 2 X D1 + 2 X D2 +********+ 2 X D6 + 2 X D7 + 1 * (VrefU - VrefL) + VrefL 256 MITSUBISHI ELECTRIC ( 5/6) MITSUBISHI M62356P 8-BIT 8CH D-A CONVERTER APPLICATION CIRCUIT 5V 10F 17 VDD 11 5V 10F VrefU1 Ao1 12 Ao2 13 OUTPUT VOLTAGE RANGE (0 to 5V) 10 VrefU2 12V 10F Ao3 14 Ao4 15 Ao5 4 Ao6 1 MICRO COMPUTER 2 3 LD Ao7 CLK D1 GND 8 VrefL 9 Ao8 3 OUTPUT VOLTAGE RANGE (0 to 12V) 2 1 *This IC has relatively high output impedance.To reduce the influence of noise when an output line is long,connect capacitance of a few hundred picofarads to a few thousand picofarads between the output and GND. This application circuit is connected to two reference voltages. To use this IC with a single reference voltage,short-circuit pins 10 , 11 ; the outputs from pins Ao1 ~ Ao8 will be controlled at an even level. To prevent interference by noise;be sure to connect capacitance of 10F to the power supply pin and VrefU pin. MITSUBISHI ELECTRIC ( 6/6) |
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