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[AK2921]
AK2921
Zero Drift operational amplifiers
Feature
AK2921 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, 260μA typ./ch (VDD:5.0V), which is available to operate full swing signals in output. AK2921 is appropriated to Sensor Pre Amp. applications.
Low Voltage, Single Supply Operation : 1.6V - 5.5V
Very Low Input Offset Voltage : +/- 1.0μV typ.
Near Zero Dirft over time and temperature : +/- 5.0nV/°C typ.
Full Swing Outputs to 10kΩ Load
Power Supply Current : 260μA typ./ch (VDD: 5.0V, No Load)
Gain Bandwidth : 0.8MHz typ.
Package : TMSOP8
Part Name AK2921T 2
Channel Number
Package TMSOP8
Pin Location
1:OUTA 2:NINA 3:PINA 4:VSS
8:VDD
A B
7:OUTB 6:NINB 5:PINB
TMSOP8 (AK2921T)
Rev.1.00Ea -1-
2012/4
http://www.Datasheet4U.com
[AK2921] Pin Function Descriptions
Pin number 1 2 3 4 5 PINB 6 7 8 Note) PWR AI AO
Name OUTA NINA PINA VSS 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
: Power Supply : Analog Input : Analog Output
Absolute Maximum Ratings VSS=0V ; Note Units V V mA °C
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
Note : All voltage with respect to ground WARNING : Operational a t or bey ond t hese lim its may result in permanent da mage to the dev ice. Normal opera tion i s not guaranteed at these extremes.
Recommended Operating Conditions
Parameter Operationg Temperature Range Supply Voltage Minimum Gain Power Supply Current
Symbol Ta VDD Av Idd1
Min. Typ. -40 2.7 5.5 1 0.26
Max. 85
0.6
Units °C V V/V mA./ch
Conditions
VDD=5.0V,No Load
Note : When the gain is adjusted to one or less , there is a possibility that operation becomes unstable. *We asuumes no responsibility for the usage beyond the conditions in this datasheet.
Rev.1.00Ea -2-
2012/4
[AK2921] Electrical Characteristics
DC Characteristics VDD:5V, Ta:-40 to 85°C, unless otherwise noted Typ. Max. Units Conditions +/- 1 +/- 20 μV +/- 5 +/- 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 120 dB 130 dB RL ≥10kΩ connected to VDD/2 +/- 85 mA +/- 35 mA
Parameter Input Voltage Offset Input Voltage Offset Drift Input Bias Current Input Common Mode Range Output Voltage Swing Common Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain Short Circuit Current Output Current
Min.
100 100 110
AC Characteristics 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:50V/V pF PF 150 pF
Parameter Gain Bandwidth Slew Rate Input Voltag.