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| ELM854xx CMOS Dual operational amplifier General description ELM854xx is low power consumption CMOS dual OP-AMP with wide range of common mode signal input voltage and push-pull output stage. With 1.2V single power supply, ELM854xx makes it easy to design power circuit. ELM854xx is suitable for circuit of portable equipments which require low power consumption or single power. Features * Single supply operation * Low voltage operation * Low current consumption * * * * : 1.2VVdd6.0V : Typ. 300A (Vdd=3.0V, 2Amp. units total) Common-mode input voltage range : Vss to Vdd-0.3V (Vdd=1.5V) Vss to Vdd-0.1V (Vdd=3.0V) : Push-pull Output stage : Typ. 1MHz (Vdd=1.5V) Unity gain bandwidth Typ. 0.8MHz (Vdd=3.0V) : SOP-8, TSSOP-8 Package Application * Battery-operated devices * Micropower signal process * Low voltage analog circuit Maximum absolute ratings Parameter Power supply voltage Input voltage Differential input voltage Output voltage Output short circuit Power dissipation Operating temperature Storage temperature Symbol Vdd Vin Vid Vout Pd Top Tstg Limit 10 Vss-0.3 to Vdd+0.3 Vdd-Vss Vss-0.3 to Vdd+0.3 Continuous 300 -20 to +70 -55 to +125 Unit V V V V Sec. mW C C Selection guide ELM854xx-x Symbol a, b c Package Taping direction AA : SOP-8 BB : TSSOP-8 S : Refer to PKG file N : Refer to PKG file ELM854 x x - x abc 9- 1 ELM854xx CMOS Dual operational amplifier Pin configuration SOP-8 (TOP VIEW) TSSOP-8 (TOP VIEW) Pin No. 1 2 3 4 Pin name OUTA IN-A IN+A VSS Pin No. 5 6 7 8 Pin name IN+B IN-B OUTB VDD Standard circuit Electrical characteristics(Vdd=1.5V) Parameter Input offset voltage Input bias current Common-mode input voltage range Maximum output voltage swing Large-signal voltage gain Common-mode rejection ratio Supply voltage rejection ratio Current consumption Unity gain bandwidth Slew rate Symbol Vio Iib Vcmr Vouts Avd CMRR PSRR Iss GBW SR Condition Vin+=Vdd/2, Unity gain follower For CMRR45dB Vid=100mV, RL=10k to Vss RL=10k to Vss RL=10k to Vss RL=10k to Vss Vdd=1.35V to 6.0V Vin+=Vdd/2, Unity gain follower RL=100k, CL=20pF Min. Vss=0V, Top=25C Typ. Max. Unit 6 mV nA V V 0.00 1.40 85 65 85 270 0.55 1.0 0.85 1.0 1.20 dB dB dB 400 A MHz V/s 9- 2 ELM854xx CMOS Dual operational amplifier Electrical characteristics(Vdd=3.0V) Parameter Input offset voltage Input bias current Common-mode input voltage range Maximum output voltage swing Large-signal voltage gain Common-mode rejection ratio Supply voltage rejection ratio Current consumption Unity gain bandwidth Slew rate Symbol Vio Iib Vcmr Vouts Avd CMRR PSRR Iss GBW SR Condition Vin+=Vdd/2, Unity gain follower For CMRR45dB Vid=100mV, RL=10k to Vss RL=10k to Vss RL=10k to Vss RL=10k to Vss Vdd=2.7V to 6.0V Vin+=Vdd/2, Unity gain follower RL=100k, CL=20pF Min. Vss=0V, Top=25 Typ. Max. Unit 6 mV nA V V 0.00 2.90 90 70 90 300 0.40 0.8 0.65 1.0 2.90 dB dB dB 450 A MHz V/s Marking SOP-8 TSSOP-8 No. a b c Mark 0 to 9 A to M (excepted I) 0 to 9 Content Last numeral of A.D. Assembly month Lot No. 9- 3 ELM854xx CMOS Dual operational amplifier Note 1) Common-mode input voltage range ELM854xx common mode input voltage range is fixed under the condition of CMRR45dB; ELM854xx is able to accept the input above its specification if the degradation of CMRR is not considered. Even if the input voltage exceeds either positive or negative power voltage, troubles such as reverse of output will not occur. As maximum absolute rating, the input voltage is possible within (Vss-0.3)V to (Vdd+0.3)V. 2) Operation from single power source ELM854xx is designed to be most suitable for single power source; therefore, ELM854xx is able to share power supply with logic circuit one. Meanwhile, ELM832BW can also operate from double power sources. To protect power supplies of ELM854xx and logic circuit from noise, please separate wire from power supply and use decoupling (bypass) capacitor. Using the capacitor can improve PSRR characteristics, especially on 10kHz to 100kHz or more. 3) Feedback When OP-AMP circuit is used with feedback resistor, oscillation may happen in the circuit with loop-gain like unity gain follower. a) When large feedback resistance is used, the phase margin is decreased by its combination with the parasitic capacitance of the input part of OP-AMP. In this situation, please connect small capacitor parallelly with feedback resistor as shown in fig-1. b) For capacitive load, external resistor in series connection will be effective as shown in fig-2. (R=300 to 500) c) Being used as an unity gain follow, ELM854xx is able to drive capacitive load of 100pF directly without oscillation. a) fig-1 b) fig-2 4) Unused Amplifier Two amplifiers will consume power even if only one amplifier is used. In order to minimize power consumption by the unused amplifier, ELM recommends to connect this amplifier as voltage follower circuit and the input terminal (IN+) to Vdd. 9- 4 ELM854xx CMOS Dual operational amplifier Typical characteristics 9- 5 ss ELM854xx CMOS Dual operational amplifier 1.5V Performance 9- 6 ELM854xx CMOS Dual operational amplifier 9- 7 ELM854xx CMOS Dual operational amplifier 3.0V Performance 9- 8 ELM854xx CMOS Dual operational amplifier 9- 9 |
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