NJU76/NJU77/NJU78 μa/ch, Rail-to-Rail Output CMOS Operational Amplifier FEATURES (V + =5V, V - =V, Ta=5 C, typ.) Supply Current (All Amplifiers) NJU76 µa NJU77 6µA NJU78 8µA Supply Voltage.8V to 5.5V Gain Bandwidth Product 6kHz Rail-to-Rail Output R L =kω to V + / 5mV from rail Ground Sense Common-Mode Input Voltage Range V to.v Input Offset Voltage mv max. Input Offset Voltage Drift.5µV/ C Thin and Ultra Small Package ESON8-U. x. x. mm RF noise Immunity Unity-Gain Stable Package NJU76 NJU77 NJU78 APPLICATIONS Battery-powered instruments Current sensor amplifiers Voltage/current monitoring Power line monitoring Photodiode amplifiers SOT--5, SC-88A MSOP8 (TVSP8)* *meet JEDEC MO-87-DA / thin type DFN8-U(ESON8-U) SSOP DESCRIPTION The NJU76/NJU77/NJU78 are single, dual and quad rail-to-rail output single supply CMOS operational amplifiers featuring low supply current. These amplifiers operates from single.8v to 5.5V supply or dual ±.9V to ±.75V supply and provide a 6kHz gain-bandwidth products while using only μa of supply current per channel, ideal for -cell battery systems and -cell li-ion battery systems. NJU76/NJU77/NJU78 have rail-to-rail outputs that typically swing to within 5mV of the rails with kω load and the input common mode voltage range includes negative supply rail and swing to within.9v of the positive rail. These characteristics make them suited for low-side current sense applications. In addition to low power and rail-to-rail output, very low bias current make them to used for photodiode amplifiers, charge amplifiers, piezoelectric sensors and other applications with high source impedance. NJU76/NJU77/NJU78 are high RF-immunity to reduce malfunctions caused by RF noises from mobile phones and others. The NJU76 is available in 5-pin SC-88A and SOT- package. NJU77 is available in 8-pin MSOP (TVSP): meet JEDEC MO-87-DA / thin type package and DFN which is thin and mm square small package. NJU78 is available in -pin SSOP package. RELATED PRODUCTS Features Single Dual Quad.µA/ch, Rail-to-rail I/O (Ultralow power type) 5nV/ Hz, Rail-to-rail Output (Low Noise type) 9V/µs, 5MHz, Rail-to-rail I/O (High slew rate type) NJU77 NJU77 NJU77 NJU77 NJU756 NJU757 NJU758 NJU76 NJU77 NJU78 Ver. []
PIN CONFIGURATION / PRODUCT INFORMATION NJU76/NJU77/NJU78 Pin Function +INPUT V - -INPUT (Top View) 5 V + OUTPUT A OUTPUT A -INPUT A +INPUT V - (Top View) 8 7 6 5 V + B OUTPUT B -INPUT B +INPUT A OUTPUT A -INPUT A +INPUT V - (Top View) Exposed Pad on Underside 8 7 6 5 V + B OUTPUT B -INPUT B +INPUT Connect to exposed pad to V- Package Product Name SC-88A SOT--5 MSOP8(TVSP8) DFN8-U(ESON8-U) NJU76F NJU76F NJU77RB NJU77KU (Top View) A OUTPUT D OUTPUT A -INPUT D -INPUT Pin Function A +INPUT V + D +INPUT V - B +INPUT 5 C +INPUT B -INPUT 6 9 C -INPUT B OUTPUT 7 8 C OUTPUT Package Product Name SSOP NJU78V Ver. []
NJU76/NJU77/NJU78 ABSOLUTE MAXIMUM RATINGS (Ta=5 C, unless otherwise noted.) PARAMETER SYMBOL RATING UNIT Supply Voltage V + - V - 7 V Input Voltage V IN V - -. to V + +. V Differential Input Voltage () V ID ±7 () V Input Current () I IN ma Power Dissipation () P D (-layer / -layer) (5) SOT--5 8 / 65 SC-88A 6 / 9 MSOP8(TVSP8) 5 / 68 SSOP 5 / 6 DFN8-U(ESON8-U) 5 (6) / (6) Operating Temperature Range T opr - to +5 C Storage Temperature Range T stg -55 to +5 C () Differential voltage is the voltage difference between +INPUT and -INPUT. () For supply voltage less than +7V, the absolute maximum rating is equal to the supply voltage. () Input voltages outside the supply voltage will be clamped by ESD protection diodes. If the input voltage exceeds the supply voltage, the input current must be limited ma or less by using a restriction resistance. () Power dissipation is the power that can be consumed by the IC at Ta=5 C, and is the typical measured value based on JEDEC condition. When using the IC over Ta=5 C subtract the value [mw/ C]=P D/(Tstg(MAX)-5) per temperature. (5) -layer: EIA/JEDEC STANDARD Test board (76.x.x.6mm, layers, FR-) mounting -layer: EIA/JEDEC STANDARD Test board (76.x.x.6mm, layers, FR-) mounting (6) -layer: EIA/JEDEC STANDARD Test board (.5x.5x.6mm, layers, FR-) mounting -layer: EIA/JEDEC STANDARD Test board (.5x.5x.6mm, layers, FR-) mounting mw Power Dissipation P D [mw] 7 6 5 Power Dissipation vs. Temperature -Layer SOT--5 MSOP8(TVSP8) DFN8-U(ESON8-U) SSOP SC-88A 5 5 75 5 5 Ambient Temperature [ºC] Power Dissipation P D [mw] 9 8 7 6 5 Power Dissipation vs. Temperature -Layer MSOP8(TVSP8) SOT--5 SSOP DFN8-U(ESON8-U) SC-88A 5 5 75 5 5 Ambient Temperature [ºC] RECOMMENDED OPERATING CONDITIONS (Ta=5 C) PARAMETER CONDITION MIN. TYP. MAX. UNIT Supply Voltage.8-5.5 V Ver. []
NJU76/NJU77/NJU78 ELECTRICAL CHARACTERISTICS (V + =5V, V - =V, Ta=5 C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT DC CHARACTERISTICS Supply Current (All Amplifiers) I SUPPLY No Signal NJU76 - μa NJU77-6 μa NJU78-8 7 μa Input Offset Voltage V IO V COM= V, R S=5Ω -.9 mv Input Offset Voltage Drift Ta = - C to 5 C NJU76/NJU77 ΔV IO/ΔT -.5 - µv/ C NJU78 - - µv/ C Input Bias Current I B - - pa Input Offset Current I IO - - pa Open-Loop Voltage Gain A V R L=kΩ to.5v, Vout=.5V to.5v 7 9 - db Common-Mode Rejection Ratio CMR V ICM=V to.v 65 8 - db Supply Voltage Rejection Ratio SVR V + =.8V to 5.5V 7 9 - db Common-Mode Input Voltage Range V ICM CMR 65dB -. V R L=kΩ to.5v.9.95 - V High-level Output Voltage Low-level Output Voltage AC CHARACTERISTICS Slew Rate (7) SR R L=kΩ to V.9.95 - V I SOURCE=mA.8.85 - V R L=kΩ to.5v -.5. V R L=kΩ to V -..5 V I SINK=mA -.5. V G V=dB, R L=kΩ to.5v, C L=pF, V IN=V PP -.5 - V/µs Gain Bandwidth Product GBW R L=kΩ to.5v, C L=pF, f=khz - 6 - khz Full Power Bandwidth FPBW G V=6dB, R F=R G=5kΩ, C L=pF, V IN=.5V PP, Vout.8V PP - 5 - khz Phase Margin Φ M R L=kΩ to.5v, C L=pF - 8 - deg Gain Margin G M R L=kΩ to.5v, C L=pF - 5 - db Equivalent Input Noise Voltage V NI f=khz - 5 - nv/ Hz Total Harmonic Distortion + Noise THD+N G V=6dB, R F=R G=5kΩ, C L=pF, V O=V PP, f=hz -. - % Channel Separation CS f=khz, NJU77/NJU78 - - db (7) Slew rate is defined by the lower value of the rise or fall. Ver. []
NJU76/NJU77/NJU78 ELECTRICAL CHARACTERISTICS (V + =V, V - =V, Ta=5 C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT DC CHARACTERISTICS Supply Current (All Amplifiers) I SUPPLY No Signal NJU76-9 μa NJU77-6 μa NJU78-5 68 μa Input Offset Voltage V IO V COM= V, R S=5Ω -.9 mv Input Offset Voltage Drift Ta = - C to 5 C NJU76/NJU77 ΔV IO/ΔT -.5 - µv/ C NJU78 - - µv/ C Input Bias Current I B - - pa Input Offset Current I IO - - pa Open-Loop Voltage Gain A V R L=kΩ to.5v, Vout=.5V to.5v 7 9 - db Common-Mode Rejection Ratio CMR V ICM=V to.v 65 8 - db Supply Voltage Rejection Ratio SVR V + =.8V to 5.5V 7 9 - db Common-Mode Input Voltage Range V ICM CMR 65dB -. V R L=kΩ to.5v.9.95 - V High-level Output Voltage Low-level Output Voltage AC CHARACTERISTICS Slew Rate (7) SR R L=kΩ to V.9.95 - V I SOURCE=mA.8.85 - V R L=kΩ to.5v -.5. V R L=kΩ to V -..5 V I SINK=mA -.5. V G V=dB, R L=kΩ to.5v, C L=pF, V IN=V PP -.5 - V/µs Gain Bandwidth Product GBW R L=kΩ to.5v, C L=pF, f=khz - 5 - khz Full Power Bandwidth FPBW G V=6dB, R F=R G=5kΩ, C L=pF, V IN=.5V PP, Vout.8V PP - 8 - khz Phase Margin Φ M R L=kΩ to.5v, C L=pF - 8 - deg Gain Margin G M R L=kΩ to.5v, C L=pF - 5 - db Equivalent Input Noise Voltage V NI f=khz - 5 - nv/ Hz Total Harmonic Distortion + Noise THD+N G V=6dB, R F=R G=5kΩ, C L=pF, V O=V PP, f=hz -. - % Channel Separation CS f=khz, NJU77/NJU78-5 - db (7) Slew rate is defined by the lower value of the rise or fall. Ver. [5]
NJU76/NJU77/NJU78 ELECTRICAL CHARACTERISTICS (V + =.8V, V - =V, Ta=5 C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT DC CHARACTERISTICS Supply Current (All Amplifiers) I SUPPLY No Signal NJU76-8 μa NJU77 - μa NJU78-65 μa Input Offset Voltage V IO V COM= V, R S=5Ω -.9 mv Input Offset Voltage Drift Ta = - C to 5 C NJU76/NJU77 ΔV IO/ΔT -.5 - µv/ C NJU78 - - µv/ C Input Bias Current I B - - pa Input Offset Current I IO - - pa Open-Loop Voltage Gain A V R L=kΩ to.9v, Vout=.5V to.v 7 9 - db Common-Mode Rejection Ratio CMR V ICM=V to.9v 65 8 - db Supply Voltage Rejection Ratio SVR V + =.8V to 5.5V 7 9 - db Common-Mode Input Voltage Range V ICM CMR 65dB -.9 V R L=kΩ to.9v.7.75 - V High-level Output Voltage Low-level Output Voltage AC CHARACTERISTICS Slew Rate (7) SR R L=kΩ to V.7.75 - V I SOURCE=.5mA.5.55 - V R L=kΩ to.9v -.5. V R L=kΩ to V -..5 V I SINK=.5mA -.5. V G V=dB, R L=kΩ to V, C L=pF, V IN=.5V PP -.5 - V/µs Gain Bandwidth Product GBW R L=kΩ to.9v, C L=pF, f=khz - - khz Full Power Bandwidth FPBW G V=6dB, R F=R G=5kΩ, C L=pF, V IN=.9V PP, Vout.6V PP - - khz Phase Margin Φ M R L=kΩ to.9v, C L=pF - 8 - deg Gain Margin G M R L=kΩ to.9v, C L=pF - 5 - db Equivalent Input Noise Voltage V NI f=khz - 5 - nv/ Hz Total Harmonic Distortion + Noise THD+N G V=6dB, R F=R G=5kΩ, C L=pF, V O=V PP, f=hz -. - % Channel Separation CS f=khz, NJU77/NJU78 - - db (7) Slew rate is defined by the lower value of the rise or fall. Ver. [6]
NJU76/NJU77/NJU78 TYPICAL CHARACTERISTICS 8 Supply Current per Amplifier vs. Supply Voltage G V =db 8 Supply Current per Amplifier vs. Temperature G V =db Supply Current per Amplifier [μa] 6 8 6 Supply Current per Amplifier [μa] 6 8 6 V + =5V V + =.8V V + =V 5 6 7 Supply Voltage V + [V] -5-5 5 5 75 5 5 Ambient Temperature [ºC] Input Offset Voltage vs. Supply Voltage V COM =V + / Input Offset Voltage vs. Common-Mode Input Voltage V + =5V Input Offset Voltage [mv] Ta=85ºC Input Offset Voltage [mv] - 5 6 Supply Voltage V + [V] - - 5 Common-Mode Input Voltage [V] Input Offset Voltage vs. Common-Mode Input Voltage V + =V Input Offset Voltage vs. Common-Mode Input Voltage V + =.8V Input Offset Voltage [mv] Input Offset Voltage [mv] - - Common-Mode Input Voltage [V] - -.6 -...6.9..5.8 Common-Mode Input Voltage [V] Ver. [7]
NJU76/NJU77/NJU78 TYPICAL CHARACTERISTICS % Input Offset Voltage Distribution V + =5V, V COM =V,, n= % Input Offset Voltage Drift Distribution V + =5V, V COM =V, n= 5% 5% Percent of Amplifiers % 5% % Percent of Amplifiers % 5% % 5% 5% % -. -. -. -...... Input Offset Voltage [mv] % -9. -6. -... 6. 9. Input Offset Voltage Drift [μv/ºc] Input Offset Voltage vs. Temperature V + =5V, V COM =.5V, n= n Input Bias Currentvs. Temperature V COM =V + / Input Offset Voltage [mv] - - - Input Bias Current [A] n p p p V + =5V V + =.8V - -5-5 5 5 75 5 5 Ambient Temperature [ºC] f 5 5 75 5 5 Ambient Temperature [ºC] Common-Mode and Supply Voltage Rejection Ratio vs. Temperature Open-Loop Voltage Gain vs. Temperature V O =.5V to V + -.5V, R L =kω to V + / Common-Mode and Supply Voltage Rejection Ratio [db] 8 6 CMR (V + =.8V) SVR CMR (V + =V) CMR (V + =5V) Open-Loop Voltage Gain [db] 8 6 V + =.8V V + =5V V + =V -5-5 5 5 75 5 5 Ambient Temperature [ºC] -5-5 5 5 75 5 5 Ambient Temperature [ºC] Ver. [8]
NJU76/NJU77/NJU78 TYPICAL CHARACTERISTICS 5. Maximum Output Voltage vs. Output Current V + =5V, V COM =.5V. Maximum Output Voltage vs. Output Current V + =V, V COM =.5V Maximum Output Voltage [V].... Maximum Output Voltage [V].5..5..5.. Output Current [ma].. Output Current [ma].8 Maximum Output Voltage vs. Output Current V + =.8V, V COM =.9V 5. Maximum Output Voltage vs. Load Resistance V + =5V, G V =OPEN, R L connected to V Maximum Output Voltage [V].5..9.6.... Output Current [ma] High-level Output Voltage [V].....5..5.. k k k Load Resistance [Ω] Low-level Output Voltage [mv]. Maximum Output Voltage vs. Load Resistance V + =V, G V =OPEN, R L connected to V.8 Maximum Output Voltage vs. Load Resistance V + =.8V, G V =OPEN, R L connected to V High-level Output Voltage [V].5..5..5.5..5.. k k k Load Resistance [Ω] Low-level Output Voltage [mv] High-level Output Voltage [V].5..9.6...... k k k Load Resistance [Ω] Low-level Output Voltage [mv] Ver. [9]
NJU76/NJU77/NJU78 TYPICAL CHARACTERISTICS Maximum Output Voltage [V].5..5..5 -.5 -. Maximum Output Voltage vs. Load Resistance V + /V - =±.5V -.5 -. -. -.5 -.5 k k k k Load Resistance [Ω] Load Resistance [Ω] Maximum Output Voltage [V].5..5 -.5 Maximum Output Voltage vs. Load Resistance V + /V - =±.5V Maximum Output Voltage [V].9.7.5.. -. -. Maximum Output Voltage vs. Load Resistance V + /V - =±.9V -.5 - C L =pf - -.7 C L =5pF -.9-6 -8 k k k k k k M Load Resistance [Ω] Frequency [Hz] Voltage Gain [db] 6 - db Voltage Gain/Phase vs. Frequency V + =5V, G V =db, R L =kω, Gain Phase C L =5pF C L =pf C L =pf C L =pf -6 Phase [deg] 6 db Voltage Gain/Phase vs. Frequency G V =db, R L =kω, C L =pf, Pulse Response V + =5V, G V =db, R L =kω, Gain V + =5V V + =V Voltage Gain [db] - Phase V + =5V V + =.8V -6 Phase [deg] V/div INPUT C L =pf - V + =V V + =.8V - OUTPUT C L =pf -6-8 k k k M Frequency [Hz] 5μs/div Ver. []
NJU76/NJU77/NJU78 TYPICAL CHARACTERISTICS Total Harmonic Distortion + Noise [%]... THD+N vs. Output Voltage V + =5V, G V =6dB, R F =R G =5kΩ, C L =pf BW=Hz-5kHz, f=hz f=hz f=khz... Output Voltage [Vpp] Equivalent Input Noise Voltage [nv/ Hz] 75 5 5 75 5 5 Voltage Noise Density vs. Frequency V + =5V, k k Frequency [Hz] -6 Channel Separation vs. Frequency -7 Channel Separation [db] -8-9 - - - - V + =V V + =.8V V + =5V - -5 k k k Frequency [Hz] Ver. []
NJU76/NJU77/NJU78 APPLICATION NOTE Single and Dual Supply Voltage Operation The NJU76/NJU77/NJU78 works with both single supply and dual supply when the voltage supplied is between V + and V. These amplifiers operate from single.8 to 5.5V supply and dual ±.9V to ±.75V supply. Vin Current Limit ma R LIMIT V + Vout Common-Mode Input Voltage Range When the supply voltage does not meet the condition of electrical characteristics, the range of common-mode input voltage is as follows: V ICM (typ.) = V to V + -.9 (Ta = 5 C) Difference of V ICM when Temperature change, refer to typical characteristic graph. During designing, consider variations in characteristics for use with allowance. Maximum Output Voltage Range When the supply voltage does not meet the condition of electrical characteristics, the range of the typ. value of the maximum output voltage is as follows: V OM (typ.) = V - +5mV to V + -5mV (R L=kΩ to V + /, Ta=5 C) During designing, consider variations in characteristics and temperature characteristics for use with allowance. In addition, also note that the output voltage range becomes narrow as shown in typical characteristics graph when an output current increases. Input Voltage Exceeding the Supply Voltage Inputs of the NJU76/NJU77/NJU78 are protected by ESD diodes (shown in Figure) that will conduct if the input voltages exceed the power supplies by more than approximately mv. Momentary voltages greater than mv beyond the power supply, inputs can be tolerated if the current is limited to ma. Figure is easily accomplished with an input resistor. If the input voltage exceeds the supply voltage, the input current must be limited ma or less by using a restriction resistance (R LIMIT ) as shown in figure. Figure. Input Current Protection for Voltages exceeding the Supply Voltage. Capacitive load The NJU76/NJU77/NJU78 can use at unity gain follower, but the unity gain follower is the most sensitive configuration to capacitive loading. The combination of capacitive load placed directly on the output of an amplifier along with the output impedance of the amplifier creates a phase lag which in turn reduces the phase margin of the amplifier. If phase margin is significantly reduced, the response will cause overshoot and ringing in the step response. The NJU76/NJU77/NJU78 is unity gain stable for capacitive loads of pf. To drive heavier capacitive loads, an isolation resistor, R ISO as shown Figure, should be used. R ISO improves the feedback loop s phase margin by making the output load resistive at higher frequencies. The larger the value of R ISO, the more stable the output voltage will be. However, larger values of R ISO result in reduced output swing, reduced output current drive and reduced frequency bandwidth. Vin V + V - R ISO C L Vout V + V - Figure. Isolating capacitive load +INPUT -INPUT OUTPUT V - Figure. Simplified Schematic Ver. []
NJU76/NJU77/NJU78 PACKAGE DIMENSIONS.9±. ~5 5.9±..MIN +..6 -..8±..6.6MAX.95±. +..-..±...MAX.±. Unit: mm SOT--5 Package +..-.5 5.65±.7.±..±..5±..5±..5±..±. - +.. -. (.5) +..5±.5.-..9±. +.5.95-.5 Unit: mm SC-88A Package Ver. []
NJU76/NJU77/NJU78 PACKAGE DIMENSIONS.9±. ~ 8 5.8±..±..55±..75±..65 +.5.7-..MAX Unit: mm.±.5.8.5 M.±.5 MSOP8 (TVSP8) Package meet JEDEC MO-87-DA / thin Exposed pad *Connect the exposed pad to V-. Unit: mm DFN8-U(ESON8-U) Package Ver. []
NJU76/NJU77/NJU78 PACKAGE DIMENSIONS +. 5. -. ~ º 8.±. 6.±. 7.5±..5±..65.67MAX +..5-.5 Unit: mm..±..±.. M SSOP Package [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver. [5]