ELM824xA 3.μA Very low power CMOS dual operational amplifier General description ELM824xA is a very low current consumption-typ.3.μa CMOS dual OP-AMP provided with a wide common mode input voltage range. It has a quasi rail-to-rail input stage and a push-pull rail-to-rail output stage. ELM824xA can operate down to 1.2V. ELM824xA is suitable for portable devices which require low power and a single voltage source. Features Application Operation from a single power source Battery-operated portable devices Low voltage operation : 1.2V Vdd 6.V Micropower signal process Low current consumption : Typ.3.μA Low voltage analog circuit N-channel depletion differential input : No gm dependence on input operating points Common-mode input voltage range : Quasi rail-to-rail input Vss to Vdd-.3V(Vdd=V) Vss to Vdd-.1V(Vdd=3.V) Output stage : Push-pull rail-to-rail output Unity gain bandwidth : Typ.15kHz(Vdd V) Package : SOT-28, SOP-8, TSSOP-8 Maximum absolute ratings Parameter Symbol Limit Unit Power supply voltage Vdd 7. V Input voltage Vin Vss-.3 to Vdd+.3 V Output voltage Vout Vss-.3 to Vdd+.3 V Output short circuit Continuous Sec. Power dissipation Pd 3 mw Operating temperature Top -4 to +85 C Storage temperature Tstg -55 to +125 C Selection guide ELM824xA-x Symbol a Package B: SOT-28 D: SOP-8 E: TSSOP-8 b Product version A c Taping direction S: Refer to PKG file N: Refer to PKG file ELM824 x A - x a b c 1-1
ELM824xA 3.μA Very low power CMOS dual operational amplifier Pin configuration SOT-28(TOP VIEW) SOP-8(TOP VIEW) TSSOP-8(TOP VIEW) Pin No. Pin name Pin No. Pin name 1 OUTA 5 IN+B 2 IN-A 6 IN-B 3 IN+A 7 OUTB 4 VSS 8 VDD Standard circuit Marking SOT-28 SOP-8 TSSOP-8 Symbol Mark Content a to 9 Last numeral of A.D. b A to M (excepted I.) Assembly month c to 9 d e to 9 and A to Z (I, O, X excepted.) Lot No. 1-2
ELM824xA 3.μA Very low power CMOS dual operational amplifier Electrical characteristics Vss=V, Top=-4~+85 C Parameter Symbol Condition Min. Typ. Max. Unit Operating voltage Vdd 1.2 6. V Vdd=V Vss=V, Top=25 C Parameter Symbol Condition Min. Typ. Max. Unit Input offset voltage Vio Vcm=Vdd/2, Unity gain follower ±6 mv Input bias current Iib 1. na Common-mode input voltage range Vcmr For CMRR 45dB. 1.2 V Maximum output voltage swing Voutsh Vid=1mV, RL=1kΩ to Vss 1.4 V Minimum output voltage swing Voutsl Vid=1mV, RL=1kΩ to Vdd.1 V Source current Isource Vout=1.2V, Vid=1mV.4 1. ma Sink current Isink Vout=.3V, Vid=1mV 1. 2.5 ma Large-signal voltage gain Avd RL=1kΩ to Vss, Vcm=.75V 95 db Common-mode rejection ratio CMRR RL=1kΩ to Vss, Vcm=.75V 85 db Supply voltage rejection ratio PSRR RL=1kΩ to Vss, Vcm=.75V 95 db Current consumption Iss Vcm=Vdd/2, Unity gain follower 3. 7.6 μa Short current Ishortp Vout to Vss shrot, Vid=1mV 1.4 ma Ishortn Vout to Vdd shrot, Vid=1mV 4. ma Unity gain bandwidth GBW 15 khz Slew rate SR RL=1kΩ, CL=2pF 7. 14. mv/μs Vdd=3.V Vss=V, Top=25 C Parameter Symbol Condition Min. Typ. Max. Unit Input offset voltage Vio Vcm=Vdd/2, Unity gain follower ±6 mv Input bias current Iib 1. na Common-mode input voltage range Vcmr For CMRR 45dB. 2.9 V Maximum output voltage swing Voutsh Vid=1mV, RL=1kΩ to Vss 2.9 V Minimum output voltage swing Voutsl Vid=1mV, RL=1kΩ to Vdd.1 V Source current Isource Vout=2.7V, Vid=1mV 4. ma Sink current Isink Vout=.3V, Vid=1mV 3. 7.5 ma Large-signal voltage gain Avd RL=1kΩ to Vss, Vcm=V 1 db Common-mode rejection ratio CMRR RL=1kΩ to Vss, Vcm=V 9 db Supply voltage rejection ratio PSRR RL=1kΩ to Vss, Vcm=V 1 db Current consumption Iss Vcm=Vdd/2, Unity gain follower 3. 7.6 μa Short current Ishortp Vout to Vss shrot, Vid=1mV 14 ma Ishortn Vout to Vdd shrot, Vid=1mV 25 ma Unity gain bandwidth GBW 15 khz Slew rate SR RL=1kΩ, CL=2pF 7.5 14.5 mv/μs 1-3
Note ELM824xA 3.μA Very low power CMOS dual operational amplifier 1) Common mode input voltage range ELM824xA common mode input voltage range is fixed under the condition of CMRR 45dB; ELM824xA 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-.3)V to (Vdd+.3)V. 2) Operation from single power source ELM824xA is designed to be most suitable for single power source; therefore, ELM824xA is able to share power supply with logic circuit one. Meanwhile, ELM824xA can also operate from double power sources. To protect power supplies of ELM824xA 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 1kHz to 1kHz 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 in parallel 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. (RL=3 to 5Ω) c) Being used as an unity gain follow, ELM824xA is able to drive capacitive load of 1pF 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. 1-4
ELM824xA 3.μA Very low power CMOS dual operational amplifier Typical characteristics 6. Iss-Vdd Unity Gain, Vcm=Vdd/2, No load 6. Iss-Top Unity Gain, Vcm=Vdd/2, No load Iss ( A) 5. 4. 3. 2. Top=-4 Iss ( A) 5. 4. 3. 2. Vdd=3.V Vdd=6.V Vdd=V Vdd=1.2V 1. 1.. 1. 2. 3. 4. 5. 6. Vdd (V) -4-2 2 4 6 8 Top ( ) 6. 5. Iss-Input Voltage Unity Gain, Vdd=3.V, No load 12. 1. Offset Voltage distribution Unity Gain, Vdd=3.V, Vcm=V, No load, Top=25 ss ( A) 4. 3. 2. Top=-4 Percent (%) 8. 6. 4. 1. 2...5 1. 2. 2.5 3. Input Voltage (V) -6. -4. -2.. 2. 4. 6. Offset Voltage (mv) 1 Avd-Frequency Vcm=Vdd/2, 1k load, Top=25 1 Avd-Frequency Vdd=3.V, Vcm=V, 1k load 8 Vdd=6.V 8 Avd (db) 6 4 2 Vdd=3.V Vdd=V Vdd=1.2V Avd (db) 6 4 2 Top=-4-2.1.1.1 1 1 1-2.1.1.1 1 1 1 1-5
ELM824xA 3.μA Very low power CMOS dual operational amplifier 12 1 8 6 4 2 CMRR-Frequency Unity Gain, Vcm=Vdd/2, 1k load, Top=25 Vdd=6.V Vdd=3.V Vdd=V Vdd=1.2V CMRR-Frequency 12 Unity Gain, Vdd=3.V, Vcm=V, 1k load 1 8 6 4 Top=-4 2-2.1.1.1 1 1 1-2.1.1.1 1 1 1 12 CMRR-Vcm [Vdd=1.2V] Frequency=1Hz, Unity Gain, 1k load 12 CMRR-Vcm [Vdd=V] Frequency=1Hz, Unity Gain, 1k load 1 8 6 4 2 Top=-4 1 8 6 4 2 Top=-4..2.4.6.8 1. 1.2 Vcm (V)..5 1. Vcm (V) 12 CMRR-Vcm [Vdd=3.V] Frequency=1Hz, Unity Gain, 1k load 12 CMRR-Vcm [Vdd=6.V] Frequency=1Hz, Unity Gain, 1k load 1 1 8 6 4 Top=-4 8 6 4 Top=-4 2 2..5 1. 2. 2.5 3. Vcm (V). 1. 2. 3. 4. 5. 6. Vcm (V) 1-6
ELM824xA 3.μA Very low power CMOS dual operational amplifier 12 1 PSRR-Frequency Unity Gain, Vcm=Vdd/2, Vdd=3.V 1k load, Top=25 12 1 PSRR-Frequency Unity Gain, Vdd=3.V, Vcm=V, 1k load PSRR (db) 8 6 4 Vdd=V Vdd=1.2V Vdd=6.V PSRR (db) 8 6 4 Top=-4 2 2-2.1.1.1 1 1 1-2.1.1.1 1 1 1 3 25 SR-Vdd Unity Gain, 1k load Falling edge (Top=+85 ) Rising edge (Top=+85 ) 3 25 SR-Top Vdd=3.V, Unity Gain, 1k load SR (mv/ s) 2 15 Falling edge (Top=+25 ) 1 Rising edge (Top=+25 ) 5 Falling edge (Top=-4 ) Rising edge (Top=-4 ) 1. 2. 3. 4. 5. 6. Vdd (V) SR (mv/ s) 2 15 1 5 Falling edge Rising edge -4-2 2 4 6 8 Top ( ) Isource (ma).6.5.4.3.2.1 Isource-Vout [Vdd=1.2V] Vid=1mV Top=-4 Isource (ma) 2. 1..5 Isource-Vout [Vdd=V] Vid=1mV Top=-4..2.4.6.8 1. 1.2..5 1. 1-7
ELM824xA 3.μA Very low power CMOS dual operational amplifier Isource (ma) 2. 15. 1. 5. Isource-Vout [Vdd=3.V] Top=-4 Vid=1mV Isource (ma) 7 6 5 4 3 2 Isource-Vout [Vdd=6.V] Top=-4 Vid=1mV 1..5 1. 2. 2.5 3.. 1. 2. 3. 4. 5. 6. 2. Isink-Vout [Vdd=1.2V] Vid=1mV Top=-4 5. 4. Isink-Vout [Vdd=V] Top=-4 Vid=1mV Isink (ma) 1. Isink (ma) 3. 2..5 1...2.4.6.8 1. 1.2..5 1. 35 Isink-Vout [Vdd=3.V] Vid=1mV 12 Isink-Vout [Vdd=6.V] Vid=1mV Isink (ma) 3 25 2 15 1 Top=-4 Isink (ma) 1 8 6 4 Top=-4 5 2..5 1. 2. 2.5 3.. 1. 2. 3. 4. 5. 6. 1-8
ELM824xA 3.μA Very low power CMOS dual operational amplifier Short Circuit Current (ma) 7 6 5 4 3 2 1 Short Circuit Current-Vdd Vout to Vss short, Vid=1mV Top=-4 1. 2. 3. 4. 5. 6. Vdd (V) Short Circuit Current (ma) 12 1 8 6 4 2 Short Circuit Current-Vdd Vout to Vdd short, Vid=1mV Top=-4 1. 2. 3. 4. 5. 6. Vdd (V) Maximum 1.4 1.2 1..8.6.4.2 Maximum Vout-RL [Vdd=1.2V] RL is connected between Vout and Vss. Vid=1mV Top=-4 Maximum 2. 1..5 Maximum Vout-RL [Vdd=V] RL is connected between Vout and Vss. Vid=1mV Top=-4. 1 1 1 1 1 1. 1 1 1 1 1 1 Maximum 3.5 3. 2.5 2. 1. Maximum Vout-RL [Vdd=3.V] RL is connected between Vout and Vss. Vid=1mV Top=-4 Maximum 7. 6. 5. 4. 3. 2. Maximum Vout-RL [Vdd=6.V] RL is connected between Vout and Vss. Vid=1mV Top=-4.5 1.. 1 1 1 1 1 1. 1 1 1 1 1 1 1-9
ELM824xA 3.μA Very low power CMOS dual operational amplifier Minimum 1.4 1.2 1..8.6.4 Minimum Vout-RL [Vdd=1.2V] RL is connected between Vdd and Vout. Vid=1mV.2 Top=-4. 1 1 1 1 1 1 Minimum 2. 1..5 Minimum Vout-RL [Vdd=V] RL is connected between Vdd and Vout. Vid=1mV Top=-4. 1 1 1 1 1 1 3.5 3. Minimum Vout-RL [Vdd=3.V] RL is connected between Vdd and Vout. Vid=1mV 7. 6. Minimum Vout-RL [Vdd=6.V] RL is connected between Vdd and Vout. Vid=1mV Minimum 2.5 2. 1. Minimum 5. 4. 3. 2..5 Top=-4 1. Top=-4. 1 1 1 1 1 1. 1 1 1 1 1 1 Pulse Response [Vdd=V] Unity Gain, 1k load, Top=25 3. Pulse Response [Vdd=3.V] Unity Gain, 1k load, Top=25 Vin (V) 1..5 Vin Vin (V) 2. 1. Vin 3.. Vout 1..5. Vout 2. 1.. 2 4 6 8 1 Time ( s). 2 4 6 8 1 Time ( s) 1-1