AKM AK1222

[AK1222]
AK1222
900MHz Low Power Mixer
1. Overview
The AK1222 is a low power mixer. RF and LO frequency range coverage from 100 to 900MHz and IF coverage is
from 20 to 100MHz. The RF input provides single-ended 50 interface. LO ports are 50 matched and
complementary inputs should be decoupled to the ground. IF output ports are differential open drain outputs.
The linearity and power consumption performances can optimize with the resistance connected to the BIAS pin.
2. Features

Operating Frequency:

Linearity vs Power Selectable architecture
100 to 900MHz
Power Consumption:5.3mA, IIP3:+11dBm, Gain:-2dB, NF:12dB
Power Consumption:2.9mA, IIP3:+2dBm, Gain:-3.5dB, NF:11.5dB

LO input level:
0dBm±5dB

Operating Supply Voltage:
4.75 to 5.25 V

Package:
16pin UQFN (0.5mm pitch, 3mm x 3mm x 0.60mm)

Operating Temperature Range:
-40 to 85C
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Table of Contents
1.
Overview _______________________________________________________________ 1
2.
Features _______________________________________________________________ 1
3.
Block Dagram ___________________________________________________________ 3
4.
System Diagram _________________________________________________________ 4
5.
Pin Functional Description ________________________________________________ 5
6.
Absolute Maximum Ratings _______________________________________________ 7
7.
Recommended Operating Range ___________________________________________ 7
8.
Electrical Characteristics__________________________________________________ 8
9.
Typical Performance _____________________________________________________ 9
10.
Typical Evaluation Board Schematic _______________________________________ 16
11.
IC Interface Schematic ___________________________________________________ 24
12.
Outer Dimensions ______________________________________________________ 25
13.
Marking _______________________________________________________________ 26
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BIAS
3. Block Diagram
LOINP
Iref
Lo Buffer
LOINN
IFOUTP
RFIN
Mixer
VSS
VDD
IFOUTN
Fig. 1 Block Diagram
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[AK1222]
4. System Diagram
VSS
Current Adjustment Resistor
VDD
BIAS
(Power feeding for Open-drain Output)
AK1222
LO Input
LOINP
LO Buffer
Iref
LOINN
VSS
IFOUTP
Mixer
RF Input
Output Load Resistor VSS
RLoad
BALUN
IF Output
RFIN
IFOUTN
VDD
VSS
VSS
VSS
VDD
VSS
Fig. 2 System Diagram
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5. Pin Functional Description
Table 1 Pin Function
No.
Name
I/O
Pin Functions
1
RFIN
AI
RF Input
2
VSS
G
Ground pin
3
LOINN
AI
LO Input Negative
4
LOINP
AI
LO Input Positive
5
NC
-
Non Connect
6
NC
-
Non Connect
7
NC
-
Non Connect
8
NC
-
Non Connect
9
BIAS
Resistance pin for current
Remarks
Connecting an inductor between this pin and ground.
Connecting a resistor between this pin and ground.
AIO
adjustment
10
VDD
11
IFOUTN
P
Power Supply
IF Output Negative
This pin is open drain output.
AO
It needs power feeding via an inductor.
12
IFOUTP
IF Output Positive
This pin is open drain output.
AO
It needs power feeding via an inductor.
13
NC
-
Non Connect
14
NC
-
Non Connect
15
NC
-
Non Connect
16
NC
-
Non Connect
Note) It is recommended to connect NC pins to ground, although it will not make any impact on the electrical
characteristics if the pin is open.
AI: Analog input pin
P: Power supply pin
AO: Analog output pin
G: Ground pin
AIO: Analog I/O pin
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LOINN
3
LOINP
4
NC
NC
NC
13
TOP
VIEW
5
6
7
8
NC
2
14
NC
VSS
15
NC
1
16
NC
RFIN
NC
[AK1222]
12
IFOUTP
11
IFOUTN
10
VDD
9
BIAS
Fig. 3 Package Pin Layout
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6. Absolute Maximum Ratings
Table 2 Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Unit
-0.3
5.5
V
Supply Voltage
VDD
RF Input Power
RFPOW
7
dBm
LO Input Power
LOPOW
12
dBm
Storage Temperature
Tstg
125
C
-55
Remarks
Exceeding these maximum ratings may result in damage to the AK1222. Normal operation is not guaranteed at
these extremes.
7. Recommended Operating Range
Table 3 Recommended Operating Range
Symbol
Min.
Operating
Temperature
Parameter
Ta
-40
Supply Voltage
VDD
4.75
Typ.
5
Max.
Unit
85
C
5.25
V
Remarks
The specifications are applicable within the recommended operating range (supply voltage/operating temperature).
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8. Electrical Characteristics
1．Analog Circuit Characteristics
Unless otherwise noted IF output=50MHz, LO Input Level=-5dBm to +5dBm,
Output Load Resistor (RLoad)=2.2k, VDD=4.75 to 5.25V, Ta=-40 to 85°C
Parameter
Min.
Typ.
Max.
Unit
RF Input Frequency
100
900
MHz
LO Input Frequency
100
900
MHz
IF output Frequency
20
100
MHz
LO Input Power
-5
+5
dBm
Current Adjustment Resistor(BIAS)
22
56
k
IDD
0
Remarks
BIAS=22k
5.3
7.9
mA
The total current of VDD pin,
BIAS=56k
2.9
4.7
mA
IFOUTP pin and IFOUTN pin.
RFIN=600MHz, Output Load Resistor = 22k
Conversion Gain
-4
SSB Noise Figure (NF)
-2
0
dB
12
14
dB
IP1dB
-3
0
dBm
IIP3
+8
+11
dBm
Design guarantee value
RFIN=600MHz, Output Load Resistor = 56k
Conversion Gain
-5.5
SSB Noise Figure (NF)
-3.5
-1.5
dB
11.5
13.5
dB
IP1dB
-9
-6
dBm
IIP3
-1
+2
dBm
Design guarantee value
Note 1) In the shipment test, NC pins and the exposed pad on the center of the back of the package is connected
to ground.
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9. Typical Performance
Unless otherwise noted, RF input =600MHz, LO input =550MHz, IF output =50MHz,
Output Load Resistor (RLoad)=2.2k
1. Current Adjustment Resistor vs. IIP3, NF, IP1dB, Gain, IDD
14.0
16.0
12.0
15.0
14.0
NF [dB]
IIP3 [dBm]
10.0
8.0
6.0
4.0
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
20
30
40
50
60
20
30
BIAS [kΩ]
4.0
5.0
3.0
4.0
50
60
50
60
3.0
2.0
2.0
1.0
Gain [dB]
IP1dB [dBm]
40
BIAS [kΩ]
0.0
-1.0
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-5.0
20
30
40
50
60
20
BIAS [kΩ]
30
40
BIAS [kΩ]
6.0
5.0
IDD [mA]
4.0
3.0
2.0
1.0
0.0
20
30
40
50
60
BIAS [kΩ]
Fig. 4
Note 1)
Current Adjustment Resistor vs. IIP3, NF, IP1dB, Gain, IDD
A resistor with 5% tolerance are used.
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2.
Over temperature vs. IIP3, NF, IP1dB, Gain, IDD
14.0
16.0
12.0
15.0
14.0
BIAS=22kΩ
BIAS=56kΩ
8.0
6.0
NF [dB]
10.0
IIP3 [dBm]
BIAS=22kΩ
BIAS=56kΩ
4.0
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
-40
-20
0
20
40
60
80
100
-40
-20
0
Temperature [deg]
4.0
5.0
3.0
4.0
40
60
80
100
BIAS=22kΩ
BIAS=56kΩ
3.0
2.0
2.0
1.0
BIAS=22kΩ
BIAS=56kΩ
0.0
-1.0
Gain [dB]
IP1dB [dBm]
20
Temperature [deg]
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-5.0
-4.0
-40
-20
0
20
40
60
80
-40
100
-20
0
20
40
60
80
100
Tempurature [deg]
Temperature [deg]
6.0
IDD [mA]
5.0
4.0
3.0
2.0
1.0
BIAS=22kΩ
BIAS=56kΩ
0.0
-40
-20
0
20
40
60
80
100
Temperature [deg]
Fig. 5
Over temperature vs. IIP3, NF, IP1dB, Gain, IDD
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3. Supply voltage vs. IIP3, NF, IP1dB, Gain, IDD
14.0
16.0
12.0
15.0
14.0
8.0
BIAS=22kΩ
BIAS=56kΩ
6.0
NF [dB]
IIP3 [dBm]
10.0
13.0
12.0
11.0
4.0
10.0
2.0
9.0
0.0
8.0
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
VDD [V]
VDD [V]
4.0
3.0
1.0
BIAS=22kΩ
BIAS=56kΩ
0.0
-1.0
Gain [dB]
2.0
IP1dB [dBm]
BIAS=22kΩ
BIAS=56kΩ
-2.0
-3.0
-4.0
5.0
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
BIAS=22kΩ
BIAS=56kΩ
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
VDD [V]
VDD [V]
6.0
IDD [mA]
5.0
4.0
3.0
2.0
1.0
BIAS=22kΩ
BIAS=56kΩ
0.0
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
VDD [V]
Fig. 6 Supply voltage vs. IIP3, NF, IP1dB, Gain, IDD
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14.0
16.0
12.0
15.0
10.0
14.0
8.0
NF [dB]
IIP3 [dBm]
4. RF input frequency vs. IIP3, NF, IP1dB, Gain
BIAS=22kΩ
BIAS=56kΩ
6.0
4.0
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
100
200 300 400 500
600 700 800 900 1000
100 200 300 400 500
RF Frequency [MHz]
600 700 800 900 1000
RF Frequency [MHz]
4.0
5.0
3.0
4.0
3.0
2.0
2.0
1.0
0.0
Gain [dB]
IP1dB [dBm]
BIAS=22kΩ
BIAS=56kΩ
BIAS=22kΩ
BIAS=56kΩ
-1.0
BIAS=22kΩ
BIAS=56kΩ
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-5.0
100
200 300 400 500
600 700 800 900 1000
100 200 300 400 500
RF Frequency [MHz]
Fig. 7
600 700 800 900 1000
RF Frequency [MHz]
RF input frequency vs. IIP3, NF, IP1dB, Gain
Note 1) AK1222 supports 100MHz to 900MHz RF Input.
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[AK1222]
5. IF output frequency vs. IIP3, NF, IP1dB, Gain
14.0
16.0
12.0
15.0
14.0
10.0
BIAS=22kΩ
BIAS=56kΩ
8.0
NF [dB]
IIP3 [dBm]
BIAS=22kΩ
BIAS=56kΩ
6.0
4.0
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
20
40
60
80
100
120
20
40
IF Frequency [MHz]
4.0
5.0
3.0
4.0
80
Gain [dB]
2.0
1.0
BIAS=22kΩ
BIAS=56kΩ
0.0
100
120
BIAS=22kΩ
BIAS=56kΩ
3.0
2.0
IP1dB [dBm]
60
IF Frequency [MHz]
-1.0
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-5.0
20
40
60
80
100
120
20
IF Frequency [MHz]
40
60
80
100
120
IF Frequecy [MHz]
Fig. 8 IF output frequency vs. IIP3, NF, IP1dB, Gain
Note 1) AK1222 supports 20MHz to 100MHz IF Output.
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[AK1222]
14.0
16.0
12.0
15.0
10.0
14.0
8.0
NF [dB]
IIP3 [dBm]
6. LO input power vs. IIP3, NF, IP1dB, Gain
BIAS=22kΩ
BIAS=56kΩ
6.0
4.0
BIAS=22kΩ
BIAS=56kΩ
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
-20
-15
-10
-5
0
5
10
-20
-15
Lo
Level[dBm]
[dBm]
LOInput
Input Level
-5
0
4.0
5.0
3.0
4.0
3.0
Gain [dB]
1.0
BIAS=22kΩ
BIAS=56kΩ
-1.0
10
BIAS=22kΩ
BIAS=56kΩ
2.0
0.0
5
Lo
[dBm]
LOInput
Input Level
Level [dBm]
2.0
IP1dB [dBm]
-10
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-5.0
-20
-15
-10
-5
0
5
10
-20
Lo
[dBm]
LOInput
Input Level
Level [dBm]
-15
-10
-5
0
5
10
Lo
[dBm]
LOInput
Input Level
Level [dBm]
Fig. 9 LO input power vs. IIP3, NF, IP1dB, Gain
Note 1) AK1222 supports -5dBm to 5dBm LO input power.
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[AK1222]
14.0
16.0
12.0
15.0
10.0
14.0
8.0
NF [dB]
IIP3 [dBm]
7. Output Load Resistor (RLoad) vs. IIP3, NF, IP1dB, Gain
BIAS=22kΩ
BIAS=56kΩ
6.0
4.0
BIAS=22kΩ
BIAS=56kΩ
13.0
12.0
11.0
10.0
2.0
9.0
0.0
8.0
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
1.4
1.6
1.8
RLoad [kΩ]
4.0
5.0
3.0
4.0
2.2
2.4
2.6
2.8
3.0
2.0
BIAS=22kΩ
BIAS=56kΩ
2.0
1.0
Gain [dB]
IP1dB [dBm]
2
RLoad [kΩ]
BIAS=22kΩ
BIAS=56kΩ
0.0
-1.0
1.0
0.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-5.0
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
1.4
1.6
RLoad [kΩ]
Fig. 10
1.8
2
2.2
2.4
2.6
2.8
RLoad [kΩ]
Output Load Resistor （RLoad） vs. IIP3, NF, IP1dB, Gain
8．Leakage
RF input=600MHz, -20dBm, LO input=600MHz, 0dBm, Ta=25°C VDD=5V
Parameter
RF – LO Leakage
RF – IF Leakage
LO – RF Leakage
LO – IF Leakage
BIAS
Typ.
Unit
22k
-50
dBc
56k
-50
dBc
22k
-80
dBc
56k
-80
dBc
22k
-50
dBc
56k
-50
dBc
22k
-80
dBc
56k
-80
dBc
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[AK1222]
10. Typical Evaluation Board Schematic
1. Typical Evaluation Board Schematic
VSS
Current Adjustment Resistor
22 to 56kΩ
BIAS
AK1222
LO Input
50Ω
100pF
100pF
VSS
RF Input C1
LOINP
LO Buffer
VDD
(Powefeeding for Open-drain Output)
Iref
10nF
100pF
LOINN
IFOUTP
Mixer
RFIN
Output Load
Resistor
RLoad
VSS
BALUN
IF Output
IFOUTN
L1
VDD
VSS
RF Input
Impedance Matching
VSS
IF Output
Impedance Matching
100pF
VSS
10nF
VDD
VSS
Fig. 11 Typical Evaluation Board Schematic
Note 1) The open drain output needs power feeding via a inductor. (IFOUTP pin and IFOUTN)
Note 2) It is necessary to adjust impedance matching as to its setting frequency. (RF input and IF output)
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[AK1222]
2. Example of impedance matching
・RFIN
RF Input
RFIN
C1
AK1222
L1
Frequency[MHz]
C1[pF]
L1[nH]
150
15
82
450
5.1
22
600
3.6
15
900
3.9
6.8
Frequency[MHz]
C1[pF]
L1[nH]
150
15
82
Start 50MHz, Stop 1GHz
1
-1
Marker 1
1
0
1
150MHz: 36.1
4.2
Fig. 12 RFIN 150MHz example of impedance matching
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[AK1222]
Frequency[MHz]
C1[pF]
L1[nH]
450
5.1
22
Start 50MHz, Stop 1GHz
1
-1
21
Marker 1
2
0
3
1
450MHz: 51.1
3.3
Marker 2
3
394MHz: 25.1
-7.6
Marker 3
524MHz: 85.6
-30.1
Fig. 13 RFIN 450MHz example of impedance matching
Frequency[MHz]
C1[pF]
L1[nH]
600
3.6
15
Start 50MHz, Stop 1GHz
1
-1
1
Marker 1
0
1
600MHz: 46.2
-3.3
Fig. 14 RFIN 600MHz example of impedance matching
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[AK1222]
Frequency[MHz]
C1[pF]
L1[nH]
900
3.9
6.8
Start 50MHz, Stop 1GHz
1
-1
Marker 1
0
1
900MHz: 61.8
11.0
Fig. 15 RFIN 900MHz example of impedance matching
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[AK1222]
・IFOUT
VDD
(Powefeeding for Open-drain Output)
10nF
100pF
Output Load Resistor VSS
RLoad
L2
AK1222
BALUN
IF Output
IFOUTP
R1
C2
IFOUTN
L3
VSS
Frequency [MHz]
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
30
2.2
3.9
1800
1800
50
2.2
2.0
1000
1000
60
2.2
0.5
1000
1000
80
2.2
N/A
680
680
470nH : Murata LQW21HNR47J00L
100
2.2
N/A
470
470
BALUN:Mini-Circuits ADT4-6T+
1800nH : Murata LQW21HN1R8J00L
1000nH : Murata LQW21HN1R0J00L
680nH : Murata LQW21HNR68J00L
Frequency [MHz]
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
30
2.2
3.9
1800
1800
3
Start 10MHz, Stop 140MHz
-1
1
0
1
Marker 1
30MHz: 55.5
2
-19.7
Marker 2
28MHz: 55.7
-37.3
Marker 3
36MHz: 72.8
38.4
Fig. 16 IFOUT 30MHz example of impedance matching
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[AK1222]
Frequency [MHz]
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
50
2.2
2
1000
1000
3
Start 10MHz, Stop 140MHz
1
-1
0
1
Marker 1
50MHz: 43.2
2
-7.5
Marker 2
45MHz: 37.3
-28.6
Marker 3
59MHz: 81.6
34.6
Fig. 17 IFOUT 50MHz example of impedance matching
Frequency [MHz]
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
60
2.2
0.5
1000
1000
Start 10MHz, Stop 140MHz
-1
0
1
3
1
Marker 1
60MHz: 52.7
2
-19.0
Marker 2
54MHz: 43.4
-33.1
Marker 3
70MHz: 100.7
-8.4
Fig. 18 IFOUT 60MHz example of impedance matching
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[AK1222]
Frequency [MHz]
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
80
2.2
N/A
680
680
Start 10MHz, Stop 140MHz
1
-1
0
1
Marker 1
3
2
80MHz: 38.5
-14.5
Marker 2
75MHz: 31.2
-21.3
Marker 3
95MHz: 78.7
-33.8
Fig. 19 IFOUT 80MHz example of impedance matching
2
R1 [k]
C2 [pF]
L2 [nH]
L3 [nH]
100
2.2
N/A
470
470
Start 10MHz, Stop 140MHz
1
-1
Frequency [MHz]
0
1
Marker 1
100MHz: 38.9
1.6
Marker 2
90MHz: 26.9
-12.2
Fig. 20 IFOUT 100MHz example of impedance matching
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[AK1222]
・LOINP/LOINN
LO Input
50ohm
100pF
LOINP
LOINN
AK1222
100pF
VSS
Fig. 21
LOINP/LOINN example of impedance matching
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11. IC Interface Schematic
No.
Name
I/O
Function
1
RFIN
I
RF input pin
3
LOINN
I
LO input pins
4
LOINP
I
27kohm
9
BIAS
I/O
Analog I/O pin
300ohm
11
IFOUTN
O
12
IFOUTP
O
IF output pins
IFOUTP
IFOUTN
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12. Outer Dimensions
1 pin marking
(Note 1)
0.58±0.05
3.0±0.10
3.0±0.10
1
4
16
5
13
8
9
12
Fig. 22 Outer Dimensions
Note 1. 1 pin marking is only a reference for the 1 pin location on the top of package.
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13. Marking
(a) Style
:
QFN
(b) Number of pins
:
16
(c) 1 pin marking:
:
○
(d) Product number
:
1222
(e) Date code
:
YWWL (4 digits)
Y:
Lower 1 digit of calendar year (Year 2011 → 1, 2012 → 2 ...)
WW:
Week
Lot identification, given to each product lot which is made in a week
 LOT ID is given in alphabetical order (A, B, C…).
1222(d)
YWWL (e)
(c)
Fig. 23
Marking
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[AK1222]
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to
the information contained in this document without notice. When you consider any use
or application of AKM product stipulated in this document (“Product”), please make
inquiries the sales office of AKM or authorized distributors as to current status of the
Products.
1. All information included in this document are provided only to illustrate the operation
and application examples of AKM Products. AKM neither makes warranties or
representations with respect to the accuracy or completeness of the information
contained in this document nor grants any license to any intellectual property rights
or any other rights of AKM or any third party with respect to the information in this
document. You are fully responsible for use of such information contained in this
document in your product design or applications. AKM ASSUMES NO LIABILITY
FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE
USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that
require extraordinarily high levels of quality and/or reliability and/or a malfunction or
failure of which may cause loss of human life, bodily injury, serious property damage
or serious public impact, including but not limited to, equipment used in nuclear
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finance-related fields. Do not use Product for the above use unless specifically agreed
by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you
are responsible for complying with safety standards and for providing adequate
designs and safeguards for your hardware, software and systems which minimize risk
and avoid situations in which a malfunction or failure of the Product could cause loss
of human life, bodily injury or damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any
information contained in this document for any military purposes, including without
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and regulations and follow the procedures required by such laws and regulations. The
Products and related technology may not be used for or incorporated into any products
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as the RoHS compatibility of the Product. Please use the Product in compliance with
all applicable laws and regulations that regulate the inclusion or use of controlled
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liability for damages or losses occurring as a result of noncompliance with applicable
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6. Resale of the Product with provisions different from the statement and/or technical
features set forth in this document shall immediately void any warranty granted by
AKM for the Product and shall not create or extend in any manner whatsoever, any
liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part,
without prior written consent of AKM.
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