1/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. d/a converter series for electronic adjustments standard 8bit 4ch ? 6ch type d/a converters BH2227FV, bh2228fv description the BH2227FV and bh2228fv ics are 8bit r-2r-type d/a converters with 4 and 6 channels, respectively. optimized circuitry allows two output voltages to be supplied (3v/5v). furthermore, the built-in reset f unction ensures that the output voltage at all channels is low during power up. a broad power supply voltage range is available (2.7v-5.5v), providing design flexibility. features 1) suitable for 2 independent power sources (3v/5v) 2) built-in reset function 3) high speed output response characteristics 4) 3-line serial interface 5) broad power supply voltage range: 2.7v-5.5v applications dvcs, dscs, dvds, cd-rs, cd-rws lineup parameter BH2227FV bh2228fv power source voltage range 2.7 to 5.5v 2.7 to 5.5v number of channels 4ch 6ch current consumption 0.9ma 0.9ma differential non linearity error 1.0lsb 1.0lsb integral non linearity error 1.5lsb 1.5lsb output current performance 1.0ma 1.0ma settling time 100s 100s data transfer frequency 10mhz 10mhz input method cmos cmos data latch method csb method csb method package ssop-b14 ssop-b14 absolute maximu m ratings(ta=25 ) parameter symbol limits unit remarks power source voltage vcc -0.3 to 7.0 v - terminal voltage vin -0.3 to vcc v - storage temperature range tstg -55 to 125 - power dissipation pd 400* 1 mw - *1 derated at 4.0mw/ at ta>25 *2 this product is not robust against radiation. no.11052ebt04
BH2227FV, bh2228fv technical note 2/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. recommended operating conditions(ta=25 ) parameter symbol limits unit remarks min. typ. max. vdd power source voltage vdd 2.7 - 5.5 v - vfs voltage to be impressed vfs 2.7 - 5.5 v - terminal input voltage range vin 0 - vdd v - analog output current io -1.0 - 1.0 ma - action temperature range topr -20 - 85 - serial clock frequency fclk - 1.0 10.0 mhz - limit load capacity cl - - 0.1 f - electrical characteristics(unless otherwise s pecified, vdd=vfs=3.0v, rl=open, cl=0pf, ta=25 ) parameter symbol limits unit conditions min. typ. max. vdd system idd - 0.5 1.5 ma vdd=5v clk=1mhz vfs system ifs - 0.3 0.9 ma l input voltage vil vss - 0.6 v vdd=5.0v h input voltage vih 2.4 - vdd v vdd=5.0v input current iin -10 - 10 a output zero scale voltage zs vss - 0.1 v 00h setting, at no load vss - 0.3 v 00h setting, iol=1.0ma output full scale voltage fs1 vdd-0.1 - vdd v ffh setting, at no load vdd-0.3 - vdd v ffh setting,ioh=1.0ma fs2 vfs-0.1 - vfs v ffh setting, at no load vfs-0.3 - vfs v ffh setting,ioh=1.0ma differential non linearity error dnl -1.0 - 1.0 lsb input code 02h to fdh integral non linearity error inl -1.5 - 1.5 lsb input code 02h to fdh vdd power source voltage rise time trvdd 100 - - s vdd=0 2.7 power on reset release voltage vpor - 1.9 - v
BH2227FV, bh2228fv technical note 3/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. timing chart(unless otherwise specified, vdd = vfs = 3.0v, rl = open, cl = 0pf, ta = 25 ) parameter symbol limits unit conditions min. typ. max. clk l level time tclkl 50 - - ns clk h level time tclkh 50 - - ns di setup time tsdi 20 - - ns di hold time thdi 40 - - ns csb setup time tscsb 50 - - ns csb hold time thcsb 50 - - ns csb h level time tcsbh 50 - - ns d/a output settling time tout - - 100 s cl=50pf,rl=10k ? fig.1 tclkl tclkh tsdi thdi tout clk di csb a nalog output 2.4v 0.6v 2.4v 0.6v 90% 10% tscsb 2.4v 0.6v thcsb tcsbh
BH2227FV, bh2228fv technical note 4/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. terminal description / block diagrams (BH2227FV) terminal terminal name function 1 ao1 analog output terminal 2 ao2 3 testmoni1 test terminal (open at normal use) 4 testmoni2 5 ao3 analog output terminal 6 ao4 7 nc internally not connected yet 8 nc 9 vdd power source terminal (ao3, 4 full scale voltage use in common) 10 csb chip select signal input terminal 11 clk serial clock input terminal 12 di serial data input terminal 13 vfs ao1,2 full scale voltage setting terminal 14 vss ground terminal fig.2 (bh2228fv) terminal terminal name function 1 ao1 analog output terminal 2 ao2 3 ao3 4 ao4 5 ao5 6 ao6 7 nc internally not connected yet 8 nc 9 vdd power source terminal (ao4~6 full scale voltage use in common) 10 csb chip select signal input terminal 11 clk serial clock input terminal 12 di serial data input terminal 13 vfs ao1,2,3 full scale voltage setting terminal 14 vss ground terminal fig.3 equivalent circuits terminal equivalent circuit terminal equivalent circuit ao1 ao2 ao3 ao4 ao5 ao6 di clk csb fig.4 equivalent circuit ao3 ao4 2 ao2 serial interface vdd poweron reset vdd r2r reg vfs vdd 1 ao1 5 ao5 6 ao6 7 nc r2r reg vfs vdd r2r reg vdd vdd r2r reg vdd vdd 14 vss 13 vfs 12 di 11 clk 10 csb 9 vdd 8 nc 4 vfs vdd 3 r2r reg vfs vdd r2r reg vdd vdd vss vss vdd vdd vss vss vdd vdd 6 test moni1 test moni2 2 ao2 serial interface poweron reset r2r reg vfs vdd 1 ao1 5 ao3 ao4 7 nc r2r reg vfs vdd r2r reg vdd vdd r2r reg vdd vdd 14 vss 13 vfs 12 di 11 clk 10 csb 9 vdd 8 nc 4 3
BH2227FV, bh2228fv technical note 5/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. operation description command transmission the control command consists of 3-lines of 12bit serial input data (msb first). data is read at the rise edge of clk, and data becomes vali d in the csb low area (before the csb rise for 12bit data). fig.5 data settings d0 d1 d2 d3 d4 d5 d6 d7 setting 0 0 0 0 0 0 0 0 gnd 1 0 0 0 0 0 0 0 (vdd or vfs-gnd)/256x1 0 1 0 0 0 0 0 0 (vdd or vfs-gnd)/256x2 1 1 0 0 0 0 0 0 (vdd or vfs-gnd)/256x3 0 0 1 0 0 0 0 0 (vdd or vfs-gnd)/256x4 ~ ~ 0 1 1 1 1 1 1 1 (vdd or vfs-gnd)/256x254 1 1 1 1 1 1 1 1 (vdd or vfs-gnd)/256x255 note: initial status d[7:0]=00h channel settings d8 d9 d10 d11 BH2227FV bh2228fv 0 0 0 0 inconsequential inconsequential 0 0 0 1 ao1 ao1 0 0 1 0 ao2 ao2 0 0 1 1 inconsequential ao3 0 1 0 0 inconsequential ao4 0 1 0 1 ao3 ao5 0 1 1 0 ao4 ao6 0 1 1 1 inconsequential inconsequential 1 0 0 0 inconsequential inconsequential 1 0 0 1 inconsequential inconsequential 1 0 1 0 inconsequential inconsequential 1 0 1 1 inconsequential inconsequential 1 1 0 0 inconsequential inconsequential 1 1 0 1 inconsequential inconsequential 1 1 1 0 inconsequential inconsequential 1 1 1 1 inconsequential inconsequential d0 d1 csb clk di d2 d3 d4 d5 d6 d7 d8 d9 d10 d11 x x 1 2345678 9 10 11 12
BH2227FV, bh2228fv technical note 6/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. electrical characteristics curves fig.6 vdd current consumption fig.7 vfs current consumption fig.8 output voltage characteristic fig.9 differential non linearity error fig.10 integral non linearity error fig.11 power source voltage to differential non linearity error fig.12 power source voltage to integral non linearity error fig.13 output zero scale voltage fig.14 output full scale voltage fig.15 reset release voltage fig.16 settling time fig.17 input voltage 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vdd[v] circuit current:idd[ma] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vfs[v] circuit current:ifs[ma] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 temparature:ta[ ] reset voltage:vpor[v] 0 20 40 60 80 100 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] settling time:tout[s] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] input voltage:vil,vih[v] 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] inl [lsb] 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] zero scale voltage:zs[mv] -140 -120 -100 -80 -60 -40 -20 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] full scale voltage:fs[mv] -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0 64 128 192 256 input code [dec] dnl [lsb] -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 0 64 128 192 256 input code [dec] inl [lsb] 0.00 0.05 0.10 0.15 0.20 0.25 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage:vcc[v] dnl [lsb] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 64 128 192 256 input code [dec] output voltage:vo[v] 85 25 -20 -20 25 85 -20 25 85 85 25 -20 85 25 -20 vdd=3.0v vdd=3.0v vdd=3.0v il=1.0ma il=1.0ma vih vil
BH2227FV, bh2228fv technical note 7/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. operation notes (1) absolute maximum ratings operating or testing the device over the maximum specifications may damage the part itself as well as peripheral components. therefore, please ensure that the specifications are not exceeded. (2) gnd potential ensure that the gnd terminal is at the lowe st potential under all operating conditions. (3) thermal design use a thermal design that allows for a sufficient margin regarding power dissipation (pd) under actual operating conditions. (4) terminal shorts and mis-mounting incorrect orientation or misalignment of the ic when mounting to the pcb may damage part. short-circuits caused by the introduction of foreign matter between the output terminals or across the output and power supply or gnd may also result in destruction. (5) operation in a strong magnetic field operation in a strong electromagnet ic field may cause malfunction. (6) set the power source voltage so that vdd R vfs. (7) reset function the power on reset circuit, which initializes internal settings, may malfunction during abrupt power ons. therefore, set the time constant so as to satisfy the power source rise time. thermal derating curve ?ssop-b14 board size : 70 x 70 x 1.6mm material : fr4 glass epoxy board (copper foil area less than 3%) fig.18 0 100 200 300 400 500 0 25 50 75 100 125 ta [ ] pd [mw]
BH2227FV, bh2228fv technical note 8/8 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. ordering part number b h 2 2 2 7 f v - e 2 part no. part no. package fv: ssop-b14 packaging and forming specification e2: embossed tape and reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin (unit : mm) ssop-b14 8 7 14 1 0.10 6.4 0.3 4.4 0.2 5.0 0.2 0.22 0.1 1.15 0.1 0.65 0.15 0.1 0.3min. 0.1
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.
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