ASAHI KASEI [AK2920] AK2920 Zero Drift operational amplifiers Feature AK2920 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, 800μA typ./ch (VDD:5.0V), which is available to operate full swing signals in output. AK2920 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 : 800μA typ./ch (VDD: 5.0V, No Load) Gain Bandwidth : 2MHz typ. Package : TMSOP8 Part Name AK2920T 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 (AK2920T) MS0953-E-01 2011/06 -1- ASAHI KASEI [AK2920] 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. 0.8 Max. 85 5.5 1.5 Units °C V mA/ch Conditions VDD=5.0V,No Load *We asuumes no responsibility for the usage beyond the conditions in this datasheet. MS0953-E-01 2011/06 -2- ASAHI KASEI [AK2920] 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 110 110 110 Typ. +/- 1 +/- 2 +/- 100 0.0 – VDD-0.2 0.03 – VDD-0.03 130 130 130 +/- 50 +/- 25 VDD:5V, Ta:-40 to 85°C, unless otherwise noted Max. Units Conditions +/- 10 μV +/- 20 nV/°C pA V V RL ≥10kΩ connected to VDD/2 dB dB dB RL ≥10kΩ connected to VDD/2 mA 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 0.2 0.1 0.02 1.5 12 MS0953-E-01 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 2011/06 -3- ASAHI KASEI [AK2920] 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] MS0953-E-01 2011/06 -4- ASAHI KASEI [AK2920] 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] MS0953-E-01 2011/06 -5- ASAHI KASEI [AK2920] 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] MS0953-E-01 2011/06 -6- ASAHI KASEI [AK2920] 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) MS0953-E-01 2011/06 -7- ASAHI KASEI [AK2920] 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) MS0953-E-01 2011/06 -8- ASAHI KASEI [AK2920] Common Mode Rejection Ratio vs. Frequency CMRR 120 2.7V 100 5.0V CMRR [dB] 80 60 40 20 0 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 Frequency [Hz] Power Supply Rejection Ratio vs. Frequency (VDD=2.7V, Ta=25°C) Power Supply Rejection Ratio vs. Frequency (VDD=5V, Ta=25°C) PSRR PSRR 140 140 2.7V_VDD 120 5.0V_VSS 100 PSRR [dB] PSRR [dB] 100 80 60 80 60 40 40 20 20 0 1.E+00 5.0V_VDD 120 2.7V_VSS 0 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 Frequency [Hz] 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 Frequency [Hz] MS0953-E-01 2011/06 -9- ASAHI KASEI [AK2920] Power Supply Rejection Ratio vs. Temperature (VDD=5V PSRR - Temperature 130 120 PSRR [dB] 110 100 90 80 70 60 50 -40 10 60 Temperature [°C] Maximum output swing vs. Frequency (VDD=2.7V, Ta=25°C, Av = 1, RL = 10kΩ) Maximum output swing vs. Frequency (VDD=5V, Ta=25°C, Av = 1, RL = 10kΩ) Maximum output swing 3 6 2.5 5 Maximum output swing [V] Maximum output swing [V] Maximum output swing 2 1.5 1 0.5 0 1.E+01 4 3 2 1 0 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 Frequency [Hz] 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 Frequency [Hz] MS0953-E-01 2011/06 - 10 - ASAHI KASEI [AK2920] Voltage noise density (VDD=2.7V, Ta=25°C, f=0~2.5kHz) Voltage noise density (VDD=5V, Ta=25°C, f=0~2.5kHz) Voltage noise density Voltage noise density 120 Voltage noise density [nV/√Hz] Voltage noise density [nV/√Hz ] 120 100 80 60 40 20 100 80 60 40 20 0 0 0 500 1000 1500 2000 0 2500 500 1000 Frequency [Hz] Voltage noise density (VDD=2.7V, Ta=25°C, f=0~20kHz) 2000 2500 Voltage noise density (VDD=5V, Ta=25°C, f=0~20kHz) Voltage noise density Voltage noise density 120 120 Voltage noise density [nV/√Hz] Voltage noise density [nV/√Hz] 1500 Frequency [Hz] 100 80 60 40 20 0 100 80 60 40 20 0 0 5000 10000 15000 20000 Frequency [Hz] 0 5000 10000 15000 20000 Frequency [Hz] MS0953-E-01 2011/06 - 11 - ASAHI KASEI [AK2920] Voltage noise density (VDD=5V, Ta=25°C, f=1~10kHz) Voltage noise density Voltage noise density [nV/√Hz] 100 10 1 10 100 1000 10000 Frequency [Hz] Voltage noise (VDD=2.7V, Ta=25°C, f=0.1~10Hz) Voltage noise (VDD=5V, Ta=25°C, f=0.1~10Hz) 0.1Hz to 10Hz Noise 0.1Hz to 10Hz Noise +0.3 +0.3 Vn +0.2 +0.2 Vn Voltage [μV] Voltage [μV] +0.1 -0.2 -0.1 -0.2 Vn = 0.31μVpp Vn = 0.18μVpp -0.3 -0.3 Time (1sec/DIV) Time (1sec/DIV) MS0953-E-01 2011/06 - 12 - ASAHI KASEI [AK2920] Output short-circuit current vs. Temperature (VDD=2.7V, Ta=-40 to 85°C) Maximum output swing vs. Frequency (VDD=5V, Ta=25°C, Ta=-40 to 85°C) Output short-circuit current 50 40 30 20 10 0 -10 -20 -30 -40 -50 Output short-circuit current [mA] Output short-circuit current [mA] Output short-circuit current IscIsc+ -40 -20 0 20 40 60 100 80 60 40 20 0 -20 -40 -60 -80 -100 IscIsc+ -40 80 -20 0 20 40 60 80 Temperature [°C] Temperature [°C] Input offset voltage drift(VDD=5V, Ta=25°C, Ta=-40 to 85°C) Input offset voltage drifft Number of amplifiers 30 25 20 15 10 5 0 -12 -8 -4 0 4 8 Input offset voltage drift [nV/℃] 12 MS0953-E-01 2011/06 - 13 - ASAHI KASEI [AK2920] Package 1. Marking 1.1 TMSOP8 8 7 6 5 (1) Pin Number 1 indication mark (2) Part Number (3) Date Code (Year) (4) Date Code (Month) (5) Lot Number 920 (2) YMA (1) (3) (4) (5) 1 2 3 4 2. Outline Dimensions 2.1 TMSOP8 Package Outline (UNIT:mm) 0.127 +0.1 -0.05 0.55±0.2 2.8 4.0±0.1 2.9 +0.12 -0.1 0.9±0.08 1 0.65 +0.1 0.1 -0.05 0~10° 0.1 0.2 +0.05 -0.03 0.1 M MS0953-E-01 2011/06 - 14 - ASAHI KASEI [AK2920] IMPORTANT NOTICE z These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of the products. z Descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application examples of the semiconductor products. You are fully responsible for the incorporation of these external circuits, application circuits, software and other related information in the design of your equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. z Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. z AKM products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), and AKM assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKM. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. z It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification. MS0953-E-01 2011/06 - 15 -