[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 (+/- 1.0V) and near zero input offset dirft.
It’s operated with very small current consumptions, 700A 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 : +/- 1.0V typ.
 Near Zero Dirft over time and temperature : +/- 2.0nV/C typ.
 Full Swing Outputs to 10k Load
 Power Supply Current : 700A 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
V
+/- 2
+/- 100 nV/C
+/- 20
pA
0.0 –
V
VDD-0.2
0.03 –
V RL 10k connected to VDD/2
VDD-0.03
130
dB
130
dB
130
dB RL 10k 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/s Av:1V/V
nVrms f:1kHz
/√Hz
Vpp
Vpp
msec Av:1V/V
pF
PF
150
pF
2012/4
-3-
[AK2929]
Typical Operating Characteristics
 Supply Current vs. Temperature
(Vin:1/2VDD)
IDD-T emperat ure
2500
IDD [ A]
2000
1500
1000
2.7V
500
5.0V
0
-40
-20
0
20
40
60
80
T emperat ure [°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
0.1
sink
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]
Closed 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 = 2 k
0
-20
1 .E+01
Av = 1 0, RL = 2k
20
-10
-30
Av = 1 00 , RL = 2 k
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
impedance[]
Output
impedance [ ]
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[]
impedance[]
Output
140
Phase [degrees]
Open loop gain and Phase vs. Frequency
Av=100
150
100
50
0
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
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 (4s/DIV)
Time (4sec/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
-0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.2
Time (4s/DIV)
Time (4s/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+
40
OS-
Overshoot [%]
Overshoot [%]
40
30
20
10
OS-
30
20
10
0
1.E+00
OS+
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 (10  sec/DIV)
Time (10sec/DIV)
Rev.1.00Ea
2012/4
-8-
[AK2929]
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]
 Common Mode Rejection Ratio vs. Frequency
 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]
Rev.1.00Ea
2012/4
-9-
[AK2929]
 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 = 10k)
 Maximum output swing vs. Frequency
(VDD=5V, Ta=25C, Av = 1, RL = 10k)
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
3
2
1
0
0
1.E+01
4
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]
Rev.1.00Ea
2012/4
- 10 -
[AK2929]
 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 densit y
Voltage noise density
120
Voltage noise density [nV/Hz]
Volt age 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]
2000
2500
Frequency [Hz]
 Voltage noise density
(VDD=2.7V, Ta=25C, f=0~20kHz)
 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
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]
Rev.1.00Ea
2012/4
- 11 -
[AK2929]
 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
+0.2
+0.3
Vn
+0.2
Voltage [V]
Voltage [V]
+0.1
-0.2
Vn
-0.1
-0.2
Vn = 0.18 V pp
Vn = 0.31 V pp
-0.3
-0.3
Time (1sec/DIV)
Time (1sec/DIV)
Rev.1.00Ea
2012/4
- 12 -
[AK2929]
 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
Rev.1.00Ea
2012/4
- 13 -
[AK2929]
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
929
(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±0.2
2.9 +0.12
-0.1
0.95MAX
1
0.65
+0.1
0.1 -0.05
0~10°
0.1
0.2±0.05
0.1 M
Rev.1.00Ea
2012/4
- 14 -
[AK2929]
IMPORTANT NOTICE
 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.
 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.
 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.
 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.
 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.
Rev.1.00Ea
2012/4
- 15 -