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| MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS DESCRIPTION The M62333/M62338 is an integrated circuit semiconductor of CMOS structure with 3 channels of built in D-A converters with output buffer operational amplifiers. The input is 2-wires serial method is used for the transfer format of digital data to allow connection with a microcomputer with minimum wiring. The output buffer operational amplifier employs AB class output circuit with sync and source drive capacity of 1.0mA or more,and it operates in the whole voltage range from Vcc to ground. The M62333 and the M62338 differ only in their slave address. PIN CONFIGURATION(TOP VIEW) Ao1 1 M62333 M62338 Ao2 2 Ao3 3 N.C. 4 8 Vcc 7 SCL 6 SDA 5 GND Outline 8P4 (P) 8P2S-A (FP) FEATURES * Digital data transfer format I 2C BUS serial data method * Output buffer operational amplifier it operates in the whole voltage range from Vcc to ground. N.C.:NO CONNECTION * High output current drive capacity 1.0mA over APPLICATION Conversion from digital data to analog control data for home-use and industrial equipment. Signal gain control or automatic adjustment of DISPLAYMONITOR or CTV. BLOCK DIAGRAM Vcc 8 SCL 7 SDA 6 GND 5 POWER ON RESET I 2 C BUS TRANSCEIVER CHANNEL DECODER 8 8bit Latch 8bit upper segment R-2R 8bit Latch 8bit upper segment R-2R 8bit Latch 8bit upper segment R-2R 1 2 3 Ao1 Ao2 Ao3 MITSUBISHI ELECTRIC 980714 rev.E (1 / 6 ) MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS EXPLANATION OF TERMINALS Pin No. 6 7 1 2 3 8 5 Symbol SDA SCL Ao1 Ao2 Ao3 Vcc GND Function Serial data input terminal Serial clock input terminal 8-bit resolution D-A converter output terminal Power supply terminal GND terminal ABSOLUTE MAXIMUM RATING Symbol Vcc Vin Vo Pd Topr Tstg Parameter Supply voltage Input voltage Output voltage Power dissipation Operating temperature Storage temperature Conditions Ratings -0.3 to 7.0 -0.3 to Vcc+0.3 -0.3 to Vcc+0.3 417 (DIP) / 272 (FP) -20 to 85 -55 to 125 Unit V V V mW C C ELECTRICAL CHARACTERISTICS (Vcc=+5V10%,GND=0V,Ta=-20 to 85C unless otherwise noted) Symbol Vcc Icc IILK VIL VIH VAO IAO SDL SL Parameter Suplly voltage Supply current Input leak current Input low voltage Input high voltage Buffer amplifier output voltage range Buffer amplifier output drive range Differential nonlinearity Nonlinearity VCC=5.12V(20mV/LSB) without load (IAO=0) IAO=100A IAO=500A Upper side saturation voltage=0.3V Lower side saturation voltage=0.2V CLK=500kHz Operation, IAO=0A Data : 6Ah (at maximum current ) SDA=SCL=GND,IAO=0A Test conditions MIN 2.7 0 0 -10 Ratings TYP 5.0 0.9 0.6 MAX 5.5 2.7 1.8 10 0.2VCC Unit V mA mA A V V VIN=0 to Vcc 0.8VCC 0.1 0.2 -1.0 -1.0 -1.5 -2.0 -2.0 VCC-0.1 VCC-0.2 1.0 1.0 1.5 2.0 2.0 0.1 5.0 V V mA LSB LSB LSB LSB F 980714 rev.E ( 2 / 6 ) SZERO Zero code error SFULL Co Ro Full scale error Output capacitative load Buffer amplifier output inpedance MITSUBISHI ELECTRIC MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS I2C BUS LINE CHARACTERISTICS Symbol fSCL tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR tF tSU:STO Parameter SCL clock frequency Time the bus must be free before a new transmission can start Hold time START Condition. After this period,the first clock pulse is generated. LOW period of the clock HIGh period of the clock Set-up time for START condition (Only relevant for a repeated START condition) Hold time DATA Set-up time DATA Rise time of both SDA and SCL lines Fall time of both SDA and SCL lines Set-up time for STOP condition Min. 0 4.7 4.0 4.7 4.0 4.7 0 250 4.0 Max. 100 1000 300 - units KHz s s s s s s ns ns ns s * Note that a transmitter must internally provide at least a hold time to bridge the undefined region (max.300 ns) of the falling edge of SCL. TIMING CHART tR, tF tBUF VIH SDA VIL tHD:STA VIH SCL tSU:DAT tHD:DAT tSU:STA tSU:STO VIL tLOW START tHIGH START STOP START MITSUBISHI ELECTRIC 980714 rev.E ( 3 / 6 ) MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS I2C BUS FORMAT STA SLAVE ADDRESS W A STA: start condition W: write(SDA=Low) SUB ADDRESS A DAC DATA A STP A: affirmation bit STP: stop condition * SLAVE ADDRESS M62333 First Last M62338 First Last 1 0 0 1 1 1 1 1 0 0 1 1 1 0 * SUB ADDRESSS First Last CHANNEL SELECT DATA X X X X X X S1 S0 S1 0 0 1 1 S0 0 1 0 1 Channel selection Don't care CHANNEL SELECT DATA ch1 selection ch2 selection ch3 selection Don't care * DAC DATA First MSB Last LSB D7 First MSB D6 D5 D4 D3 D2 D1 D0 Last LSB D7 0 0 0 0 : 1 1 D6 0 0 0 0 : 1 1 D5 0 0 0 0 : 1 1 D4 0 0 0 0 : 1 1 D3 0 0 0 0 : 1 1 D2 0 0 0 0 : 1 1 D1 0 0 1 1 : 1 1 D0 0 1 0 1 : 0 1 DAC output Vcc/256 Vcc/256 Vcc/256 Vcc/256 : Vcc/256 Vcc x1 x2 x3 x4 x 255 MITSUBISHI ELECTRIC 980714 rev.E ( 4 / 6 ) MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS TIMING CHART (MODEL) *start condition to slave address bite SDA SCL D/A output start condition *sub address bite 1 2 3 4 5 6 7 W A SDA SCL D/A output 1 2 3 4 5 6 7 8 A *DAC data bite to stop condition SDA SCL D/A output 1 2 3 4 5 6 7 8 A stop condition *Start condition *Stop condition With SCL at HIGH,SDA line goes from HIGH to LOW With SCL at HIGH,SDA line goes from LOW to HIGH (Under normal circumstances,SDA is changed when SCL is LOW) *Acknowledge bit The receiving IC has to pull down SDA line whenever receive slave data. (The transmitting IC releases the SDA line just then transmit 8bit data.) Digital Data Formats STA SLAVE ADDRESS W A SUB ADDRESS 1 A DAC DATA 1 A SUB ADDRESS 2 A DAC DATA 2 A SUB ADDRESS n A DAC DATA n A STP MITSUBISHI ELECTRIC 980714 rev.E (5 / 6 ) MITSUBISHI M62333P/FP M62338P/FP 8-BIT 3CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIERS PRECAUTION FOR USE Supply voltage terminal(Vcc) is also used for D-A converter upper reference voltage setting. IF ripple or spike is input this terminal,accuracy of D-A conversion is down. So,when use this device,please connect capacitor among Vcc to GND for stable D-A conversion. This IC's output amplifier has an advantage to capacitive load.So it's no problem at device action when connect capacitor (0.1 F MAX) among output to GND for every noise eliminate. APPLICATION EXAMPLE 1 Ao1 VCC 8 10F 5V Analog output terminals 2 Ao2 5V 3 Ao3 SCL 7 MCU SDA 6 4 GND 5 Note regarding I2C BUS * Purchase of MITSUBISHI ELECTRIC CORPORATION'S I2C components conveys a license under the Philips I2C Patent Rights to use these components an I2C system,provided that the system comforms to I2C Standard Specification as defined by Philips. Keep safety first in your circuit designs! * Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury,fire or property damage. Remember to give due consideration to safety when making your circuit design, in order to prevent fires from spreading, redundancy, malfunction or other mishap. MITSUBISHI ELECTRIC 980714 rev.E ( 6 / 6 ) |
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