1/4 STRUCTURE FUNCTION SILICON MONOLITHIC INTEGRATED CIRCUIT LOW INPUT OFFSET VOLTAGE CMOS OPERATIONAL AMPLIFIER BU5281G BU5281SG PRODUCT SERIES ・Wide output voltage range(VSS～VDD) ・Low input bias current(1[pA] typ.) ・Low input offset voltage(2.5[mV] Max.) ・Slew Rate(2.0[V/μs] typ.) ・Low supply current(750[μA] typ.) ・Low power supply voltage operation(1.8[V]～5.5[V]) FEATURES ○ABSOLUTE MAXIMUM RATINGS(Ta=25[℃]) Parameter Symbol Rating Unit VDD-VSS ＋7 V Power dissipation Pd 540(*1)(*2) mW Differential Input Voltage(*3) Vid VDD-VSS V Input Common-mode Voltage Range Vicm (VSS-0.3)～VDD+0.3 V Supply Voltage Operating Temperature range BU5281 -40～+85 BU5281S -40～+105 Topr ℃ Storage Temperature Range Tstg -55～+125 ℃ Maximum junction Temperature Tjmax +125 ℃ ・This IC is not designed for protection against radioactive rays. (*1) To use at temperature above Ta＝25[℃] reduce 5.4[mW]. (*2) Mounted on a glass epoxy PCB(70[mm]×70[mm]×1.6[mm]). (*3) The voltage difference between inverting input and non-inverting input is the differential input voltage. Then input terminal voltage is set to more than VSS. ○OPERATING CONDITION(BU5281:Ta=-40[℃]～+85[℃] BU5281S:Ta=-40[℃]～+105[℃]) Parameter Supply Voltage Symbol Rating Unit VDD ＋1.8～＋5.5 (Single Supply) V REV. B 2/4 ○ELECTRICAL CHARACTERISTICS (unless otherwise specified VDD=+3[V]、VSS=0[V]) Parameter Symbol range Input offset voltage(*4) Guaranteed Limit Temperature Min. Unit Typ. Max. Vio 25℃ - 0.1 2.5 mV ΔVio/ΔT - - 0.8 - μV/℃ Input offset current(*4) Iio 25℃ - 1 - pA Input bias current(*4) Ib 25℃ - 1 - pA Input offset voltage drift(*4) Supply current(*6) 25℃ - 750 1000 Full range - - 1200 VDD-0.1 - - IDD μA High level output voltage VOH 25℃ Low level output voltage VOL 25℃ - - Large signal voltage gain AV 25℃ 70 110 Input common mode voltage Vicm 25℃ 0 - Common mode rejection ratio CMRR 25℃ 45 60 Power supply rejection ratio PSRR 25℃ 60 Output source current (*5) IOH 25℃ 5 Output sink current (*5) IOL 25℃ Slew rate SR Gain band width FT Phase margin θ 25℃ Total harmonics distortion THD RL=∞ All Op-Amps AV=0[dB],VIN=0.9[V] V RL=10[kΩ] VSS+0.1 V RL=10[kΩ] - dB RL=10[kΩ] 1.8 V VSS～VDD-1.2 - dB 80 - dB 8 - mA VDD-0.4[V] 10 16 - mA VSS+0.4[V] 25℃ - 2.0 - V/μs CL=25[pF] 25℃ - 3 - MHz Input referred noise voltage Vni Condition - 40° - - 18 - - 3.2 - μVrms - 0.003 - % CL=25[pF], AV=40[dB] CL=25[pF], AV=40[dB] nV/(Hz)1/2 AV=40[dB],f=1[kHz] 25℃ 25℃ AV=40[dB],DINAUDIO VOUT=0.4[Vp-p],f=1[kHz] (*4) Absolute value (*5) Reference to power dissipation under the high temperature environment and decide the output current. Continuous short circuit is occurring the degenerate of output current characteristics. (*6) Full range BU5281:Ta=-40[℃]～+85[℃] BU5281S:Ta=-40[℃]～+105[℃] REV. B 3/4 ○Physical Dimensions BU5281SG(SSOP5) (Unit：[mm]) BU5281G(SSOP5) (Unit：[mm]) ○Block diagram ○Pin No.・Pin Name IN+ 1 VSS 2 IN- Pin No. Pin Name 1 2 IN+ VSS ＋ 3 IN- － 4 OUT 5 VDD 5 3 4 VDD OUT G:SSOP5 ○Application example (1) Absolute maximum ratings Absolute maximum ratings are the values which indicate the limits, within which the given voltage range can be safely charged to the terminal. However, it does not guarantee the circuit operation. (2) Applied voltage to the input terminal For normal circuit operation of operational amplifier, please input voltage for its input terminal within input common mode voltage VDD+0.3[V]. Then, regardless of power supply voltage,VSS-0.3[V] can be applied to input terminals without deterioration or destruction of its characteristics. (3) Operating power supply (split power supply/single power supply) The operational amplifier operates if a given level of voltage is applied between VDD and VSS. Therefore, the operational amplifier can be operated under single power supply or split power supply. (4) Power dissipation (pd) If the IC is used under excessive power dissipation. An increase in the chip temperature will cause deterioration of the radical characteristics of IC. For example, reduction of current capability. Take consideration of the effective power dissipation and thermal design with a sufficient margin. Pd is reference to the provided power dissipation curve. (5) Short circuits between pins and incorrect mounting Short circuits between pins and incorrect mounting when mounting the IC on a printed circuits board, take notice of the direction and positioning of the IC. If IC is mounted erroneously, It may be damaged. Also, when a foreign object is inserted between output, between output and VDD terminal or VSS terminal which causes short circuit, the IC may be damaged. REV. B 4/4 (6) Output short circuit If short circuit occurs between the output terminal and VDD terminal, excessive in output current may flow and generate heat, causing destruction of the IC. Take due care. (7) Using under strong electromagnetic field Be careful when using the IC under strong electromagnetic field because it may malfunction. (8) Usage of IC When stress is applied to the IC through warp of the printed circuit board, The characteristics may fluctuate due to the piezo effect. Be careful of the warp of the printed circuit board. (9) Testing IC on the set board When testing IC on the set board, in cases where the capacitor is connected to the low impedance, make sure to discharge per fabrication because there is a possibility that IC may be damaged by stress. When removing IC from the set board, it is essential to cut supply voltage. As a countermeasure against the static electricity, observe proper grounding during fabrication process and take due care when carrying and storage it. (10) The IC destruction caused by capacitive load The transistors in circuits may be damaged when VDD terminal and VSS terminal is shorted with the charged output terminal capacitor. When IC is used as a operational amplifier or as an application circuit, where oscillation is not activated by an output capacitor,the output capacitor must be kept below 0.1[μF] in order to prevent the damage mentioned above. (11) Decupling capacitor Insert the deculing capacitance between VDD and VSS, for stable operation of operational amplifier. (12) Latch up Be careful of input vltage that exceed the VDD and VSS. When CMOS device have sometimes occur latch up operation. And protect the IC from abnormaly noise REV. 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