AKM AK2929 Zero drift operational amplifier Datasheet

[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-
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