new product r03ds0014ej0100 rev.1.00 2011.09.05 page 1 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 8-bit 4ch d/a converter wit h buffer amplifiers for i 2 c bus (corresponds to fast mode) R2A20154NS/sp description the r2a20154 is an integrated circuit semiconductor of cmos structure with 4 channels of built in d/a converters with output buffer operational amplifiers. it is the electrical characteristic improvement version of the m62334. features ? guarantee differential nonlinearity error : +/ -0.7lsb, nonlinearity error : +/-1.0lsb ? digital data transfer format: i 2 c bus serial data method (corresponds to fast mode: 400khz) ? output buffer operational amplifier it operates in the whole range from vcc to ground. ? high output current drive capacity: 1ma over ? the very small size son-8 package is added to the lineup. application conversion from digital data to analog control data for home-use and industrial equipment. signal gain control or automatic adjustment of lcd-tv, pdp-tv or lcd display-monitor. blurring correction control or various control of the interchangeable lens of digital camera block diagram 8 7 6 5 1 2 3 4 i 2 c bus transceiver channel decoder power on reset vcc scl sda gnd ao1 ao2 ao3 ao4 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 input is 2-wires serial method is used for the transfer format of digital data to allow connection with a microcomputer with minimum wiring. this ic corresponds to fast mode of i 2 c bus standard. 8-bit upper segment r-2r 8-bit latch + - 8 8-bit upper segment r-2r 8-bit latch + - 8-bit upper segment r-2r 8-bit latch + - 8-bit upper segment r-2r 8-bit latch + -
new product R2A20154NS/sp page 2 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 pin arrangement r2a20154sp (top view) pin description R2A20154NS (top view) ao3 3 ao4 4 gnd terminal gnd 5 8-bit resolution d/a converter output terminal (after power on, analog output of every channel is set in dac data ?00h?) ao1 1 ao2 2 power supply terminal vcc 8 serial clock input terminal scl 7 serial data input terminal sda 6 function pin name pin no. 1 2 3 4 8 7 6 5 ao1 ao2 ao3 ao4 vcc scl sda gnd 1 2 3 4 8 7 6 5 ao1 ao2 ao3 ao4 vcc scl sda gnd outline: prsp0008de-c [sp] outline: pwsn0008ka-a [ns]
new product R2A20154NS/sp page 3 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 (vcc= +5v +/-10%, gnd=0v, ta= -30 to +85deg unless otherwise noted) ta > +25deg ta = +85deg continuous condition mw/deg 6.75(ns) / 6.8(sp) k theta thermal derating factor mw 270(ns) / 272(sp) pd power dissipation tstg topr i ao vo vin vcc symbol v -0.3 to vcc+0.3 < 6.5 output voltage ma -2.0 to +2.0 buffer amplifier output current deg -40 to +125 storage temperature deg -30 to +85 operating temperature v -0.3 to vcc+0.3 < 6.5 input voltage v -0.3 to +6.5 supply voltage unit ratings item absolute maximum ratings electrical characteristics *1 : when power supply is turned on, internal circuit is initia lized by power on reset circuit. but, if re-powered on quickly, initialize is not operate. so, k eep the time period of re-powered on (t por ). vcc internal reset signal t por tr vcc < 0.1v (equivalent to tr vcc ) vcc por resetting period gnd gnd v 1.9 1.5 - vcc=0 to 2.7v vcc por operating voltage of internal resetting *1 s -- 100 vcc=0 to 2.7v tr vcc supply voltage rise-up time *1 ms --1 vcc < 0.1v t por time period of re-power on (power supply off ? on) *1 ma 2.0 0.8 - clk = 500 khz operation, i ao =0a, data: 6ah (at maximum current) ma 1.0 - -1.0 upper side saturation voltage = 0.3v, lower side saturation voltage = 0.2v i ao buffer amplifier output drive range ns 50 -0 t sp pulse width of spics v- 0.8 0.5 v hys hysteresis (sda, scl) v 0.4 -- i sink = 3ma v ol output low voltage (sda) vcc=5.12v (20mv/ lsb), without load (i ao = 0a) i ao =500a i ao =100a v in = 0 to vcc sda = scl = gnd, i ao =0a test conditions ro co s full s zero s l s dl v ao v ih v il i ilk icc vcc symbol lsb 2.0 - -2.0 zero code error : - 5.0 - buffer amplifier output impedance vcc ? 0.2 - 0.2 v vcc ? 0.1 - 0.1 buffer amplifier output voltage range lsb 1.0 - -1.0 nonlinearity a 10 - -10 input leak current v 0.2vcc -0 input low voltage v vcc - 0.8vcc input high voltage lsb 0.7 - -0.7 differential nonlinearity lsb 2.0 - -2.0 full scale error f 0.1 -- output capacitate load ma 1.5 0.5 - supply current v 5.5 5.0 2.7 supply voltage max. typ. min. unit limits item resetting period (ta= 25 deg unless otherwise noted)
new product R2A20154NS/sp page 4 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 timing chart sda v ih v il scl v ih v il start start start stop t r , t f t buf t hd:sta t su:dat t hd:dat t su:st0 t low t high tsu: sta cb t su:sto t f t r t su:dat t hd:dat t su:sta t high t low t hd:sta t buf f scl symbol max. min. - 4.0 - - 250 0 4.7 4.0 4.7 4.0 4.7 0 standard mode 400 - 300 1000 - 3.45 - - - - - 100 s - 0.6 set-up time for start condition. only relevant for a repeated start condition. ns 300 - fall time of sda and scl signals s - 0.6 high period of the clock s - 1.3 low period of the clock khz 400 0 scl clock frequency s - 1.3 free time: the bus must be free before a new transmission can start s - 0.6 hold time start condition after this period, the first clock pulse is generated s 0.9 0 data hold time pf 400 - capacitive load of bus line ns 300 - rise time of sda and scl signals s - 0.6 set-up time for stop condition ns - 100 data set-up time max. min. unit fast mode item all of above value are corresponds to v ih min and v il max. i 2 c bus line characteristics
new product R2A20154NS/sp page 5 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 i 2 c bus format sta stp a a aw slave address sub address dac data note: sta: start condition, a: acknowledge bit, w: write (sda=low), stp: stop condition 00 11001 ? slave address first last xs1s0 xxxxx ? sub address first last channel select data ch1 selection 00 ch2 selection 10 1 1 s1 ch4 selection 1 ch3 selection 0 channel selection s0 don?t care channel select data d2 d1 d0 d3d4d5d6d7 ? dac data first msb last lsb 1 1 : 1 1 0 0 d1 vcc/256 x 3 0 000000 vcc 1 111111 vcc/256 x 255 0 111111 : : :::::: vcc/256 x 4 1 000000 vcc/256 x 2 1 000000 vcc/256 x 1 0 000000 dac output d0 d2d3d4d5d6d7 first msb last lsb
new product R2A20154NS/sp page 6 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 data timing chart scl and sda (model) < start condition to slave address bit > sda scl d/a output < sun address bit > sda scl d/a output start condition 1234 56 7 w a 1234 56 7 8 a sda scl d/a output 1234 56 7 8 a < dac data bit to stop condition > stop condition ? start condition with scl at high, sda line goes from high to low ? stop condition with scl at high, sda line goes from low to high ( under normal circumstance, 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 8-bit data. )
new product R2A20154NS/sp page 7 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 digital data format a dac data 1 a sub address 1 aw slave address sta a dac data 2 a sub address 2 sub address n stp a dac data n a after the start condition, the transmitting ic accesse s the slave ic by slave address, and transmits the data to each channel by two bites (sub address and dac data). ? 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 converter 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 capacit ive load, so, it?s no problem at device action when connect capacitor ( 0.1 f max ) among output to gnd for every noise elimination. application example 8 7 6 5 analog output terminals + 10f mcu 5v 5v R2A20154NS/sp vcc scl sda gnd 4 ao4 3 ao3 2 ao2 1 ao1 precaution for use ordering information embossed taping/2,500 pcs. sp prsp0008de-c sop-8 r2a20154sp embossed taping/5,000 pcs. ns pwsn0008ka-a son-8 R2A20154NS packing/quantity package type no. package code package name order part no.
new product R2A20154NS/sp page 8 of 8 r03ds0014ej0100 rev.1.00 2011.09.05 package dimensions pwsn0008ka-a[ns] prsp0008de-c [sp]
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