NJU7028 13µA/ch, Rail-to-Rail Output Quad CMOS Operational Amplifier ■ GENERAL DESCRIPTION The NJU7028 is a low power, quad CMOS operational amplifier. It is tolerant to RF noise. The NJU7028 can operate from a single-supply voltage of +1.8V to +5.5V. In addition, this amplifier features Rail-to-Rail output and low input bias current (1pA). Because of these features, the NJU7028 is ideal for low-side current sense amplifier. The very low supply current of the NJU7028 (13µA/ch) makes it suitable for battery-operated application. ■ PACKAGE OUTLINE NJU7028V (SSOP14) ■ FEATURES ●Low Supply Current ●Low Operating Voltage ●Rail-to-Rail Output IDD=13µA/ch typ. Vopr= 1.8V to 5.5V VOH=4.9V min./ VOL=0.1V max. (at VDD= 5V, RL=100kΩ) VOH=4.8V min./ VOL=0.2V max. (at VDD= 5V, IO=1mA) ●Enhanced RF Noise Immunity ●CMOS Process ●Package SSOP14 ■ APPLICATION ●Battery-operated application ●Battery monitor ●Current sensor ●Photodiode amplification ■ PIN CONFIGURATION Top View 1 2 14 1 4 13 3 12 4 11 5 10 6 7 Ver.2011-04-06 2 3 9 Pin Function 1. OUTPUT 1 2. -INPUT 2 3. +INPUT 2 4. VDD 5. +INPUT 2 6. -INPUT 2 7. OUTPUT 2 8. OUTPUT 3 9. -INPUT 3 10. +INPUT 3 11. VSS 12. +INPUT 4 13. -INPUT 4 14. OUTPUT 4 8 -1- NJU7028 ■ ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD +7 Input Common Mode Voltage VICM V SS -0.3 to V DD +0.3 Differential Input Voltage VID ±7 (Note1) Power Dissipation PD 400 (Note2) Operating Temperature Range T opr -40 to +85 Storage Temperature Range T st g -55 to +125 (Note1) For supply voltage less than +7V, the absolute maximum rating is equal to the supply voltage. (Note2) EIA/JEDEC STANDARD Test board (114.3 x 76.2 x 1.6mm, 2layers, FR-4) mounting. (Note3) Do not exceed “Power dissipation: PD” in which power dissipation in IC is shown by the absolute maximum rating. See Figure “Power Dissipation Curve” when ambient temperature is over 25˚C. V V V mW ˚C ˚C Figure 1 Power Dissipation Derating Curve 600 Power Dissipation Pd (mW) (a)∆Pd=-4mW/°C(Note2) 500 400 300 200 100 0 5 25 45 65 85 105 Ambient Temperature Ta (°C) 125 ■ RECOMMENDED OPERATING CONDITION (Ta=25˚C) -2- PARAMETER SYMBOL RATING UNIT Supply Voltage V DD 1.8 to 5.5 V Ver.2011-04-06 NJU7028 ■ ELECTRICAL CHARACTERISTICS ●DC CHARACTERISTICS (VDD=5V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Supply Current IDD No Signal - 48 72 µA Input Offset Voltage Input Offset Voltage drift Input Bias Current VIO ∆VIO/∆T IB VIC=0V, RS=50Ω - 0.9 1.5 1 4 - mV µV/ºC pA - 1 - pA VO=0.5V to 4.5V, RL=100kΩ to 2.5V 70 90 - dB Input Offset Current IIO Open loop gain AV Common Mode Rejection Ratio CMR VICM=0V to 4.1V 65 80 - dB Supply Voltage Rejection Ratio SVR VDD=1.8V to 5.5V 70 90 - dB VOH1 RL=100kΩ to 2.5V 4.9 4.95 - V VOL1 RL=100kΩ to 2.5V - 0.05 0.1 V VOH2 RL=100kΩ to 0V 4.9 4.95 - V VOL2 RL=100kΩ to 0V - 0.02 0.05 V VOH3 Isource=1mA 4.8 4.85 - V VOL3 Isink=1mA - 0.15 0.2 V VICM CMR≥65dB 0 - 4.1 V MIN. TYP. MAX. UNIT Maximum Output Voltage 1 Maximum Output Voltage 2 Maximum Output Voltage 3 Common Mode Input Voltage Range ●AC CHARACTERISTICS (VDD=5V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION Gain Bandwidth Product GBW RL=100kΩ to 2.5V, CL=20pF, f=10kHz - 160 - kHz M RL=100kΩ to 2.5V, CL=20pF - 80 - deg Gain Margin GM RL=100kΩ to 2.5V, CL=20pF - 15 - dB Equivalent Input Noise Voltage en f=1kHz - 50 - nV/√Hz Slew Rate SR GV=0dB, RL=100kΩ to 2.5V, CL=20pF, Vin=3Vpp (1V to 4V) (Note4) (Note5) - 0.05 - V/us Power Bandwidth PBW GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vin=2.5Vpp (1.25V to 3.75V), Vo≥4.8Vpp (Note6) - 5 - kHz Total Harmonic Distortion THD GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vo=4Vpp, f=100Hz (Note6) - 0.01 - % Phase Margin (Note4) Slew rate is defined by the lower value of the rise or fall. (Note5) See figure2-1 for test circuit. (Note6) See figure2-3 for test circuit. Ver.2011-04-06 -3- NJU7028 ■ ELECTRICAL CHARACTERISTICS ●DC CHARACTERISTICS (VDD=3V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Supply Current IDD No Signal - 45 68 µA Input Offset Voltage Input Offset Voltage drift Input Bias Current VIO ∆VIO/∆T IB Vic=0V, RS=50Ω - 0.9 1.5 1 4 - mV µV/ºC pA - 1 - pA Vo=0.5V to 2.5V, RL=100kΩ to 1.5V 70 90 - dB Input Offset Current IIO Open loop gain AV Common Mode Rejection Ratio CMR VICM=0V to 2.1V 65 80 - dB Supply Voltage Rejection Ratio SVR VDD=1.8V to 5.5V 70 90 - dB VOH1 RL=100kΩ to 1.5V 2.9 2.95 - V VOL1 RL=100kΩ to 1.5V - 0.05 0.1 V VOH2 RL=100kΩ to 0V 2.9 2.95 - V VOL2 RL=100kΩ to 0V - 0.02 0.05 V VOH3 Isource=1mA 2.8 2.85 - V VOL3 Isink=1mA - 0.15 0.2 V VICM CMR≥65dB 0 - 2.1 V MIN. TYP. MAX. UNIT Maximum Output Voltage 1 Maximum Output Voltage 2 Maximum Output Voltage 3 Common Mode Input Voltage Range ●AC CHARACTERISTICS (VDD=3V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION Gain Bandwidth Product GBW RL=100kΩ to 1.5V, CL=20pF, f=10kHz - 150 - kHz M RL=100kΩ to 1.5V, CL=20pF - 80 - deg Gain Margin GM RL=100kΩ to 1.5V, CL=20pF - 15 - dB Equivalent Input Noise Voltage en f=1kHz - 50 - nV/√Hz Slew Rate SR GV=0dB, RL=100kΩ to 1.5V, CL=20pF, Vin=1Vpp (1V to 2V) (Note4) (Note5) - 0.05 - V/us Power Bandwidth PBW GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vin=1.5Vpp (0.75V to 2.25V), Vo≥2.8Vpp (Note6) - 8 - kHz Total Harmonic Distortion THD GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vo=2Vpp, f=100Hz (Note6) - 0.01 - % Phase Margin (Note4) Slew rate is defined by the lower value of the rise or fall. (Note5) See figure2-1 for test circuit. (Note6) See figure2-3 for test circuit. -4- Ver.2011-04-06 NJU7028 ■ ELECTRICAL CHARACTERISTICS ●DC CHARACTERISTICS (VDD=1.8V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Supply Current IDD No Signal - 43 65 µA Input Offset Voltage Input Offset Voltage drift Input Bias Current VIO ∆VIO/∆T IB Vic=0V, RS=50Ω - 0.9 1.5 1 4 - mV µV/ºC pA Input Offset Current IIO - 1 - pA Open loop gain AV Vo=0.5V to 2.5V, RL=100kΩ to 0.9V 70 90 - dB Common Mode Rejection Ratio CMR VICM=0V to 0.9V 65 80 - dB Supply Voltage Rejection Ratio Maximum Output Voltage 1 Maximum Output Voltage 2 Maximum Output Voltage 3 Common Mode Input Voltage Range SVR VDD=1.8V to 5.5V 70 90 - dB VOH1 RL=100kΩ to 0.9V 1.7 1.75 - V VOL1 RL=100kΩ to 0.9V - 0.05 0.1 V VOH2 RL=100kΩ to 0V 1.7 1.75 - V VOL2 RL=100kΩ to 0V - 0.02 0.05 V VOH3 Isource=0.5mA 1.5 1.55 - V VOL3 Isink=0.5mA - 0.25 0.3 V VICM CMR≥65dB 0 - 0.9 V ●AC CHARACTERISTICS (VDD=1.8V, VSS=0V, Ta=25˚C, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITION Gain Bandwidth Product GBW MIN. TYP. MAX. UNIT RL=100kΩ to 0.9V, CL=20pF, f=10kHz - 140 - kHz M RL=100kΩ to 0.9V, CL=20pF - 80 - deg Gain Margin GM RL=100kΩ to 0.9V, CL=20pF - 15 - dB Equivalent Input Noise Voltage en f=1kHz - 50 - nV/√Hz Slew Rate SR GV=0dB, RL=100kΩ to 1.5V, CL=20pF, Vin=0.5Vpp (0.3V to 0.8V) (Note4) (Note7) - 0.05 - V/us Power Bandwidth PBW GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vin=0.9Vpp (0V to 0.9V), Vo≥1.6Vpp (Note8) - 14 - kHz Total Harmonic Distortion THD GV=6dB, RF=50kΩ, RG=50kΩ, CL=20pF, Vo=1Vpp, f=100Hz (Note8) - 0.01 - % Phase Margin (Note4) Slew rate is defined by the lower value of the rise or fall. (Note7) See figure2-2 for test circuit. (Note8) See figure2-4 for test circuit.. Ver.2011-04-06 -5- NJU7028 ■ MEASUREMENT CIRCUITS VDD Vin VDD Vin Vout Vout RL RL CL CL VDD 2 Figure 2-1:Measurement circuit 1 Vin Figure 2-2:Measurement circuit 2 VDD Vin VDD Vout Vout CL CL RF RG RF RG VDD 2 Figure 2-3:Measurement circuit 3 -6- Figure 2-4:Measurement circuit 4 Ver.2011-04-06 NJU7028 ■ TYPICAL CHARACTERISTICS Supply Current vs. Temperature (Supply Voltage) Supply Current vs. Supply Voltage (Temperature) Ta=25ºC 50 Ta=85ºC 60 50 40 30 Ta=-40ºC Ta=-50ºC 20 40 0 30 20 0 0 1 2 3 4 5 Supply Voltage [V] 6 7 -50 -25 0 25 50 75 100 Ambient Temperature [ºC] 125 Input Offset Voltage vs. Common Mode Input Voltage Input Offset Voltage vs. Temperature (Supply Voltage) (Temperature) VDD=3V VICM=VDD/2 4.0 4.0 VDD=1.8V 3.0 VDD=3V Input Offset Voltage [mV] 3.0 Input Offset Voltage [mV] VDD=3.0V VDD=1.8V 10 10 2.0 1.0 VDD=5V 0.0 -1.0 -2.0 -3.0 2.0 Ta=-40ºC 1.0 Ta=25ºC 0.0 -1.0 Ta=85ºC -2.0 -3.0 -4.0 -4.0 -50 -25 0 25 50 75 100 Ambient Temperature [ºC] 125 -2.0 120 110 110 100 100 90 90 Number of Amplifier 120 70 60 50 40 30 80 70 60 50 40 30 20 20 10 10 0 4.0 VDD=5V, VICM=0V, Ta=-40 to 85ºC, n=240 VDD=5V, VICM=0V, Ta=25ºC, n=240 80 -1.0 0.0 1.0 2.0 3.0 Common Mode Input Voltage [V] Input Offset Voltage Drift Distribution Input Offset Voltage Distribution Number of Amplifier VDD=5.0V VDD=5.5V Ta=125ºC Supply Current [µA] 60 Supply Current [µA] GV=0dB GV=0dB 0 -4.5 -3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5 4.5 Input Offset Voltage [mV] Ver.2011-04-06 -9.0 -7.0 -5.0 -3.0 -1.0 1.0 3.0 5.0 7.0 9.0 Input Offset Voltage Drift [µV/ºC] -7- NJU7028 ■ TYPICAL CHARACTERISTICS CMR vs. Temperature (Supply Voltage) 120 VDD=3V 100 VDD=5V 100 80 VDD=1.8V 60 40 20 0 80 60 40 20 0 -50 -25 0 25 50 75 100 Ambient Temperature [ºC] 125 -50 Gain vs. Temperature -25 0 25 50 75 100 Ambient Temperature [ºC] VDD=5V, VCM=2.5V 5.0 4.5 VDD=5V 100 Ta=85ºC VDD=3V Output Voltage [V] 4.0 80 VDD=1.8V 60 40 Ta=25ºC 3.5 Ta=-40ºC 3.0 2.5 2.0 1.5 Ta=85ºC 1.0 20 Ta=25ºC Ta=-40ºC 0.5 0 -50 -25 0 25 50 75 100 Ambient Temperature [ºC] 0.0 0.001 125 Output Voltage vs. Output Current (Temperature) 100 1.8 Ta=85ºC 2.5 Ta=25ºC Output Voltage [V] Ta=-40ºC 2.0 Ta=85ºC 1.5 Ta=25ºC Output Voltage [V] 0.1 1 10 Output Current [mA] VDD=1.8V, VCM=0.9V 3.0 1.5 1.0 Ta=85ºC Ta=-40ºC 1.2 0.9 0.6 Ta=85ºC Ta=25ºC Ta=25ºC 0.5 -8- 0.01 Output Voltage vs. Output Current (Temperature) VDD=3V, VCM=1.5V 0.0 0.001 125 Output Voltage vs. Output Current (Temperature) VO=0V → VDD-0.5V, RL=100kΩ to 0V 120 Voltage Gain [dB] VDD=1.8V → 5.5V 120 Supply Voltage Rejection Ratio [dB] 140 Common Mode Rejection Ratio [dB] SVR vs. Temperature VICM=0V → VDD-0.9V 0.3 Ta=-40ºC 0.01 0.1 1 10 Output Current [mA] 100 0.0 0.001 Ta=-40ºC 0.01 0.1 1 10 Output Current [mA] 100 Ver.2011-04-06 NJU7028 ■ TYPICAL CHARACTERISTICS Gain / Phase vs. Frequency Gain / Phase vs. Frequency (Load Capacitance) RF=1MΩ, RG=10kΩ, RL=100kΩ, CL=20pF, Ta=25ºC VDD=3V, RF=1MΩ, RG=10kΩ, RL=100kΩ, Ta=25ºC 60 120 40 20 60 VDD=1.8V Phase 0 0 VDD=5V -20 -60 -40 VDD=3V 1k Phase [deg] Voltage Gain [dB] VDD=3V Voltage Gain [dB] VDD=5V -60 100 180 Gain Gain 40 180 -120 120 CL=100pF CL=20pF 20 60 Phase 0 0 CL=20pF -20 -40 -60 -120 CL=150pF VDD=1.8V CL=100pF 10k 100k Frequency[Hz] 1M -180 10M -60 100 1k 10k 100k Frequency [Hz] 1M -180 10M THD+Noise vs. Output Voltage Voltage Noise vs. Frequency VDD=3V, Gv=6dB, RF=50kΩ, CL=20pF BW=10Hz-500kHz, Ta=25ºC VDD=3V, GV=40dB, RF=100kΩ, RG=1kΩ, Ta=25ºC 10 200 Total Harmonic Distortion+Noise[%] 180 Equivalent Input Noise Voltage [nV/√Hz] CL=150pF Phase [deg] 60 160 140 120 100 80 60 40 20 0 1 10 100 Frequency [Hz] 1k 10k 1 0.1 0.01 0.001 0.001 f=100Hz f=20Hz 0.01 0.1 1 Output Voltage [Vrms] 10 Channel Separation vs. Frequency VDD=3V, GV=40dB, RF=100kΩ, RL=open, VO=0.5Vrms, Ta=25ºC -60 Channel Separation [dB] -70 -80 -90 A→B -100 -110 A→C -120 A→D -130 -140 -150 10 Ver.2011-04-06 100 1k 10k Frequency [Hz] 100k -9- NJU7028 ■ TYPICAL CHARACTERISTICS Pulse Response (Load Capacitance) Pulse Response (Load Capacitance) VDD=3V, Gv=0dB, RL=100kΩ, Ta=25ºC VDD=3V, Gv=0dB, RL=100kΩ, Ta=25ºC 3 1 3 1 2 1 2 1 0 2 2 INPUT 0 1 -1 1 -1 CL=20pF 0.5V/div. 0.5V/div. INPUT 1 -1 CL=100pF 1 OUTPUT 0 CL=120pF OUTPUT -1 CL=100pF -1 0 0 0 0 10µs/div. 0 0 0 0 0 -2 0 -2 -1 -3 -1 -1 CL=20pF -2 CL=120pF -2 -3 0 0 0 0 10µs/div. 0 0 0 0 0 [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. - 10 - Ver.2011-04-06