[AK2929] AK2929 Zero Drift operational amplifiers Feature AK2929 is the dual channel CMOS operational amplifires which is available to output with very low input offset voltage (+/- 1.0μV) and near zero input offset dirft. It’s operated with very small current consumptions, 700μA typ./ch (VDD:3.2V +/- 5%), which is available to operate full swing signals in output. AK2929 is appropriated to Sensor Pre Amp. applications. Low Voltage, Single Supply Operation : 2.7V - 5.5V Very Low Input Offset Voltage : +/- 1.0μV typ. Near Zero Dirft over time and temperature : +/- 2.0nV/°C typ. Full Swing Outputs to 10kΩ Load Power Supply Current : 700μA typ./ch (VDD: 3.2V +/- 5%, No Load) Gain Bandwidth : 2MHz typ. Package : TMSOP8 Part Name AK2929T Channel Number 2 Package TMSOP8 Pin Location 1:OUTA 2:NINA 8:VDD A 7:OUTB B 3:PINA 4:VSS 6:NINB 5:PINB TMSOP8 (AK2929T) Rev.1.00Ea 2012/4 -1- [AK2929] Pin Function Descriptions Pin number 1 2 3 4 5 6 7 8 Name OUTA NINA PINA VSS PINB NINB OUTB VDD I/O note) AO AI AI PWR AI AI AO PWR Function Amplifier A Output Amplifier A Inverted Input Amplifier A No Inverted Input Power Supply Ground Amplifier B No Inverted Input Amplifier B Inverted Input Amplifier B Output Positive Power Supply Note) PWR AI AO : Power Supply : Analog Input : Analog Output Absolute Maximum Ratings Parameter Supply Voltage Input Voltage Input Current Storage Temperature Range Symbol VDD VTD IIN Tstg Min -0.3 -0.3 -10 -55 Max 6.5 VDD + 0.3 +10 150 VSS=0V ; Note Units V V mA °C Note : All voltage with respect to ground WARNING : Operational at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. Recommended Operating Conditions Parameter Operationg Temperature Range Supply Voltage Power Supply Current Symbol Ta VDD Idd1 Min. -40 2.7 Typ. 0.7 Max. 85 5.5 1.1 Units °C V mA/ch. Conditions VDD=3.2V +/- 5%, No Load *We asuumes no responsibility for the usage beyond the conditions in this datasheet. Rev.1.00Ea 2012/4 -2- [AK2929] Electrical Characteristics DC Characteristics Parameter Input Voltage Offset Input Voltage Offset Drift Input Bias Current Input Common Mode Range Min. Output Voltage Swing Common Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain Short Circuit Current Output Current 90 100 100 VDD:5V, Ta:-40 to 85°C, unless otherwise noted Typ. Max. Units Conditions +/- 1 +/- 10 μV +/- 2 +/- 100 nV/°C +/- 20 pA 0.0 – V VDD-0.2 0.03 – V RL ≥10kΩ connected to VDD/2 VDD-0.03 130 dB 130 dB 130 dB RL ≥10kΩ connected to VDD/2 +/- 40 mA +/- 20 mA AC Characteristics Parameter Gain Bandwidth Slew Rate Input Voltage Noise 0.1 – 10Hz 0.1 – 1Hz Overload Recovery Time Input Capacitance Differential Common Mode Maximum Capacitance Loads Min. Typ. 2 1 25 0.5 0.2 0.05 1.5 12 Rev.1.00Ea VDD:5V, Ta:-40 to 85°C, unless otherwise noted Max. Units Conditions MHz Av:1V/V V/μs Av:1V/V nVrms f:1kHz /√Hz μVpp μVpp msec Av:1V/V pF PF 150 pF 2012/4 -3- [AK2929] Typical Operating Characteristics Supply Current vs. Temperature (Vin:1/2VDD) IDD-T emperature 2500 IDD [ A] 2000 1500 1000 2.7V 500 5.0V 0 -40 -20 0 20 40 60 80 T emperature [°C] Supply Current vs. Supply Voltage (Vin:1/2VDD) IDD-VDD (Ta = 25°C) 2500 IDD [ A] 2000 1500 1000 500 0 0 1 2 3 4 5 6 Supply voltage [V] Rev.1.00Ea 2012/4 -4- [AK2929] Output voltage vs. Load current (VDD=2.7V, Ta=25°C) Output voltage vs. Load current (VDD=5V, Ta=25°C) Isouce / Isink - VOL / VOH 10000 10000 1000 1000 VOL / VOH [mV] VOL / VOH [mV] Isource / Isink - VOL / VOH 100 10 1 100 10 1 source source 0.1 sink 0.1 sink 0.01 0.01 0.0001 0.001 0.01 0.1 1 0.0001 10 0.001 0.01 Closed loop gain vs. Frequency (VDD=2.7V, Ta=25°C) 70 60 60 Closed loop gain [dB] Close d loop gain [dB] 50 Av = 100, RL = 2k 40 Av = 10, RL = 2k 20 10 Av = 1, RL = 2k 0 30 10 -20 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 -30 1.E+00 1.E+07 Av = 1, RL = 2k⎠ 0 -20 1 .E+01 Av = 10, RL = 2k⎠ 20 -10 -30 Av = 100, RL = 2k⎠ 40 -10 1.E+00 10 Closed loop gain 70 30 1 Closed loop gain vs. Frequency (VDD=5V, Ta=25°C) Closed loop gain 50 0.1 Isource / Isink [mA] Isource / Isink [mA] 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 Frequency [Hz] Frequency [Hz] Rev.1.00Ea 2012/4 -5- [AK2929] Open loop gain and Phase vs. Frequency (VDD=2.7V, Ta=25°C) Open loop gain and Phase vs. Frequency (VDD=5V, Ta=25°C) Open loop gain and Phase vs. Frequency 70 Gain 60 180 70 140 60 180 Gain 100 40 60 30 20 20 -20 Phase 50 Open loop gain [dB] 50 Phase [degrees] Open loop gain [dB] Phase 100 40 60 30 20 20 -20 10 -60 10 -60 0 -100 0 -100 -10 -140 -10 -140 -180 -20 -20 1.E+03 1.E+04 1.E+05 1.E+06 1.E+03 1.E+07 -180 1.E+04 Output impedance vs. Frequency (VDD=2.7V, Ta=25°C) 1.E+07 Output impedance vs. Frequency 250 300 Av=1 Av=1 Av=10 Output Outputimpedance[Ω] impedance [Ω] 200 1.E+06 Output impedance vs. Frequency (VDD=5V, Ta=25°C) Output impedance vs. Frequency 250 1.E+05 Frequency [Hz] Frequency [Hz] Outputimpedance[Ω] impedance[Ω] Output 140 Phase [degrees] Open loop gain and Phase vs. Frequency Av=100 150 100 50 0 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 200 Av=10 Av=100 150 100 50 0 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 Frequency [Hz] Frequency [Hz] Rev.1.00Ea 2012/4 -6- [AK2929] Large signal transient response (VDD/VSS = +1.35V/- 1.35V, Ta = 25°C, CL = 150pF) Large signal transient response (VDD/VSS = +2.5V/-2.5V Ta = 25°C, CL = 150pF) Large signal tansient respons 2 4 1.5 3 Output voltage (1V/DIV) Output voltage (0.5V/DIV) Large signal transient response 1 0.5 0 -0.5 -1 -1.5 2 1 0 -1 -2 -3 -4 -2 Time (4μs/DIV) Time (4μsec/DIV) Small signal transient response (VDD/VSS = +1.35V/- 1.35V, Ta = 25°C, CL = 150pF) Small signal transient response (VDD/VSS = +2.5V/-2.5V Ta = 25°C, CL = 150pF) Small signal transinet response 0.2 0.2 0.15 0.15 Output voltage (50mV/DIV) Output voltage (50mV/DIV) Small signal transient response 0.1 0.05 0 -0.05 -0.1 0.1 0.05 0 -0.05 -0.1 -0.15 -0.15 -0.2 -0.2 Time (4μs/DIV) Time (4μs/DIV) Rev.1.00Ea 2012/4 -7- [AK2929] Small signal overshoot vs. Load Capacitance (VDD=2.7V, Ta=25°C) Small signal overshoot vs. Load Capacitance (VDD=5V, Ta=25°C) Small signal overshoot vs. Load capacitance Small signal overshoot vs. Load capacitance 50 50 OS+ OS+ 40 OS- OS- Overshoot [%] Overshoot [%] 40 30 20 10 0 1.E+00 30 20 10 0 1.E+01 1.E+02 1.E+03 1.E+04 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 Load capacitance [pF] Load capacitance [pF] Positive overvoltage recovery (VDD/VSS = +2.5V/-2.5V, Ta = 25°C) Negative overvoltage recovery (VDD/VSS = +2.5V/-2.5V, Ta = 25°C) Positive overvoltage recovery Av = -50 RL = 10k CH1 = 1V/DIV CH2 = 50mV/DIV Voltage [V] Voltage [V] Negative overvoltage recovery Av = -50 RL = 10k CH1 = 1V/DIV CH2 = 50mV/DIV Time (10μsec/DIV) Time (10μsec/DIV) Rev.1.00Ea 2012/4 -8-