New Product R2A20154NS/SP 8-bit 4ch D/A Converter with Buffer Amplifiers for I2C BUS (Corresponds to Fast mode) R03DS0014EJ0100 Rev.1.00 2011.09.05 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. 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 I2C BUS standard. 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. Features Guarantee Differential nonlinearity error : +/-0.7LSB, Nonlinearity error : +/-1.0LSB Digital data transfer format: I2C 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 Vcc SCL SDA GND 8 7 6 5 I2C BUS transceiver Power on reset 8 R03DS0014EJ0100 Rev.1.00 2011.09.05 Channel decoder 8-bit latch 8-bit latch 8-bit latch 8-bit latch 8-bit upper segment R-2R 8-bit upper segment R-2R 8-bit upper segment R-2R 8-bit upper segment R-2R +- +- +- +- 1 2 3 4 Ao1 Ao2 Ao3 Ao4 Page 1 of 8 New Product R2A20154NS/SP Pin Arrangement R2A20154NS R2A20154SP Ao1 1 8 Vcc Ao1 1 8 Vcc Ao2 2 7 SCL Ao2 2 7 SCL Ao3 3 6 SDA Ao3 3 6 SDA Ao4 4 5 GND Ao4 4 5 GND (Top view) (Top view) Outline: PWSN0008KA-A [NS] Outline: PRSP0008DE-C [SP] Pin Description Pin No. Pin Name 1 Ao1 2 Ao2 8-bit resolution D/A converter output terminal 3 Ao3 (After power on, analog output of every channel is set in DAC data “00h”) 4 Ao4 5 GND GND terminal 6 SDA Serial data input terminal 7 SCL Serial clock input terminal 8 Vcc Power supply terminal R03DS0014EJ0100 Rev.1.00 2011.09.05 Function Page 2 of 8 New Product R2A20154NS/SP Absolute Maximum Ratings (Ta= 25 deg unless otherwise noted) Item Symbol Condition Ratings Unit Supply voltage Vcc -0.3 to +6.5 V Input voltage Vin -0.3 to Vcc+0.3 < 6.5 V Output voltage Vo -0.3 to Vcc+0.3 < 6.5 V Buffer amplifier output current IAO Continuous -2.0 to +2.0 mA Pd Ta = +85deg 270(NS) / 272(SP) mW Thermal derating factor K theta Ta > +25deg 6.75(NS) / 6.8(SP) mW/deg Operating temperature Topr -30 to +85 deg Storage temperature Tstg -40 to +125 deg Power dissipation Electrical Characteristics (Vcc= +5V +/-10%, GND=0V, Ta= -30 to +85deg unless otherwise noted) Symbol Item Limits Test Conditions Vcc Supply voltage Supply voltage rise-up time *1 Operating voltage of Internal resetting *1 Input leak current Input low voltage Input high voltage Hysteresis (SDA, SCL) Output low voltage (SDA) Pulse width of spics 5.5 V - 0.8 2.0 mA SDA = SCL = GND, IAO=0µA - 0.5 1.5 mA 100 - - µs - 1.5 1.9 V 1 - - ms -10 - 10 µA 0 - 0.2Vcc V 0.8Vcc - Vcc V 0.5 0.8 - V Isink = 3mA - - 0.4 V 0 - 50 ns IAO =100µA 0.1 - Vcc – 0.1 IAO =500µA 0.2 - Vcc – 0.2 Upper side saturation voltage = 0.3V, Lower side saturation voltage = 0.2V -1.0 - 1.0 Vcc=0 to 2.7V tPOR Vcc < 0.1V IILK VIL VIH Vhys VOL tSP VIN = 0 to Vcc VAO Buffer amplifier output drive range IAO SDL SL SZERO SFULL Co Differential nonlinearity Nonlinearity Zero code error Full scale error Output capacitate load Buffer amplifier output impedance Unit 5.0 trVcc Buffer amplifier output voltage range Max. 2.7 VccPOR Vcc=0 to 2.7V Time period of re-power on (Power supply OFF ON) *1 Typ. CLK = 500 kHz operation, IAO=0µA, DATA: 6Ah (at maximum current) Icc Supply current Min. Vcc=5.12V (20mV/ LSB), without load (IAO = 0µA) Ro V mA -0.7 - 0.7 LSB -1.0 - 1.0 LSB -2.0 - 2.0 LSB -2.0 - 2.0 LSB - - 0.1 µF - 5.0 - *1 : When power supply is turned on, internal circuit is initialized by power on reset circuit. But, if re-powered on quickly, initialize is not operate. So, keep the time period of re-powered on (tPOR). trVcc Vcc tPOR (equivalent to trVcc) VccPOR GND Internal Reset signal < 0.1V GND Resetting period R03DS0014EJ0100 Rev.1.00 2011.09.05 Resetting period Page 3 of 8 New Product R2A20154NS/SP I2C BUS Line Characteristics Item Symbol SCL clock frequency Free 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. Data Hold time Data Set-up time Rise time of SDA and SCL signals FAST MODE Unit Min. Max. Min. Max. fSCL 0 100 0 400 kHz tBUF 4.7 - 1.3 - µs tHD:STA 4.0 - 0.6 - µs tLOW tHIGH 4.7 4.0 - 1.3 0.6 - µs µs tSU:STA 4.7 - 0.6 - µs tHD:DAT tSU:DAT tR 0 250 - 3.45 1000 0 100 - 0.9 300 µs ns ns tF - 300 - 300 ns tSU:STO Cb 4.0 - 400 0.6 - 400 µs pF Fall time of SDA and SCL signals Set-up time for STOP condition Capacitive load of bus line STANDARD MODE All of above value are corresponds to VIHmin and VILmax. Timing Chart tR, tF tBUF VIH SDA VIL tHD:STA tSU:DAT tHD:DAT tsu:STA tSU:ST0 VIH SCL VIL tLOW Start R03DS0014EJ0100 Rev.1.00 2011.09.05 tHIGH Start Stop Start Page 4 of 8 New Product R2A20154NS/SP I2C BUS Format STA W Slave address A A Sub address DAC data A STP Note: STA: start condition, A: acknowledge bit, W: write (SDA=Low), STP: stop condition Slave address First 1 Last 0 0 1 1 0 0 Sub address First X Last X X X X X Don’t care S1 Channel select data S1 0 0 1 1 S0 Channel Select data S0 0 1 0 1 Channel selection ch1 selection ch2 selection ch3 selection ch4 selection DAC data First MSB D7 Last LSB D6 D5 D4 D3 D2 D1 D0 First MSB Last LSB D7 D6 D5 D4 D3 D2 D1 D0 DAC output 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 Vcc/256 x 1 Vcc/256 x 2 Vcc/256 x 3 Vcc/256 x 4 : : : : : : : : : 1 1 1 1 1 1 1 0 Vcc/256 x 255 1 1 1 1 1 1 1 1 Vcc R03DS0014EJ0100 Rev.1.00 2011.09.05 Page 5 of 8 New Product R2A20154NS/SP Data Timing Chart SCL and SDA (Model) < Start condition to slave address bit > SDA 1 2 3 4 5 6 7 W A 2 3 4 5 6 7 8 A SCL D/A output Start condition < Sun address bit > SDA 1 SCL D/A output < DAC data bit to stop condition > SDA 1 2 3 4 5 6 7 8 A SCL D/A output 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. ) R03DS0014EJ0100 Rev.1.00 2011.09.05 Page 6 of 8 New Product R2A20154NS/SP Digital Data Format STA Slave address Sub address 2 A W DAC data 2 A Sub address 1 A A DAC data 1 Sub address n A DAC data n A A STP After the Start condition, the transmitting IC accesses the slave IC by Slave address, and transmits the data to each channel by two bites (Sub address and DAC data). 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 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 capacitive load, So, it’s no problem at device action when connect capacitor ( 0.1 µF Max ) among output to GND for every noise elimination. Application Example 1 Ao1 Analog output terminals 3 Ao3 R2A20154NS/SP 2 Ao2 Vcc 4 Ao4 8 + 10µF 5V 5V SCL 7 MCU SDA 6 GND 5 Ordering Information Order part No. Package Name Package Code Package type No. Packing/Quantity R2A20154SP SOP-8 PRSP0008DE-C SP Embossed Taping/2,500 pcs. R2A20154NS SON-8 PWSN0008KA-A NS Embossed Taping/5,000 pcs. R03DS0014EJ0100 Rev.1.00 2011.09.05 Page 7 of 8 R2A20154NS/SP New Product Package Dimensions PRSP0008DE-C [SP] PWSN0008KA-A[NS] R03DS0014EJ0100 Rev.1.00 2011.09.05 Page 8 of 8 Notice 1. All information included in this document is current as of the date this document is issued. Such information, however, is subject to change without any prior notice. Before purchasing or using any Renesas Electronics products listed herein, please confirm the latest product information with a Renesas Electronics sales office. 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