AK1224

[AK1224]
AK1224
900MHz Low Noise Mixer
1. Overview
The AK1224 is a high linearity and low noise mixer. RF frequency range coverage is from 100 to 900MHz and IF
coverage is from 20 to 100MHz. AK1224 can be driven by a single ended RF input and a low-power differential LO
input that can be driven with a differential or single ended LO signal. IF output ports are differential open drain
outputs. The analog circuit characteristics and power consumption performances can be optimized by the
resistance connected to the BIAS Pin.
2. Feature

Operating Frequency:

Linearity vs. Power selectable architecture:
100MHz to 900MHz
Current consumption:21mA, IIP3:+16dBm, Gain:5.5dB, NF:8.5dB

Lo input level:
0dBm ±5dB

Operating Supply Voltage:
4.75 to 5.25 V

Package:
16pin UQFN（0.5mm pitch、3mm  3mm  0.60mm）

Operating Temperature Range
-40 to 85C
3. Applications

Two-way Radios (PMR/LMR)

Radio Communications for disaster prevention

Marine Radios

Amateur Radios
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4. Table contents
1.
Overview ___________________________________________________________________________ 1
2.
Feature ____________________________________________________________________________ 1
3.
Applications ________________________________________________________________________ 1
4.
Table contents _______________________________________________________________________ 2
5.
Block Diagram ______________________________________________________________________ 3
6.
Pin Function Description _______________________________________________________________ 4
7.
Absolute Maximum Ratings ____________________________________________________________ 5
1.
Recommended Operating Range ________________________________________________________ 5
8.
Electrical Characteristics_______________________________________________________________ 6
9.
Typical Performance __________________________________________________________________ 7
10.
Typical Evaluation Board Schematic _____________________________________________________ 14
11.
LSI Interface schematic ______________________________________________________________ 16
12.
Application Information _______________________________________________________________ 18
13.
Outer Dimensions ___________________________________________________________________ 23
14.
Marking ___________________________________________________________________________ 24
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5. Block Diagram
BIAS
SELECT
15
VSS
16
IFOUTN
VDD
VDD
9
TOP
VIEW
1
2
3
4
LOINN
14
10
VSS
POWER
DOWN_H
11
VSS
13
12
RFIN
VSS
IFOUTP
Figure 1. Block Diagram
8
VDD
7
BIAS2
6
BIAS1
5
LOINP
Figure 2. Package Pin Layout
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6. Pin Function Description
Table 1
No.
Name
I/O
Pin Function
Remarks
Pin Function
1
RFIN
AI
RF Input
Connecting a inductor between this pin and ground.
2
VSS
G
Ground pin
3
VSS
G
Ground pin
4
LOINN
AI
Lo Input Negative
5
LOINP
AI
Lo Input Positive
6
BIAS1
AIO
Resistance pin for current
Connecting a resistor between this pin and ground.
adjustment
7
BIAS2
AIO
Resistance pin for current
Connecting a resistor between this pin and ground.
adjustment
8
VDD
P
Power Supply
VDD
9
VDD
P
Power Supply
VDD
10
VDD
P
Power Supply
VDD
IFOUTN
AO
IF Output Negative
This pin is open drain output.
11
It needs power feeding via an inductor.
IFOUTP
AO
IF Output Positive
This pin is open drain output.
12
It needs power feeding via an inductor.
13
VSS
G
Ground pin
POWER
DI
Power Down control pin
High：Power OFF
14
DOWN_H
BIAS
Low：Power ON
DI
Bias Resistance select pin
High：Bias2 pin is enable
15
SELECT
VSS
Low：Bias1pin is enable
G
Ground pin
16
Note)
The exposed pad at the center of the backside should be connected to ground.
AI:Analog input pin
P: Power supply pin
MS1413-E-02
AO:Analog output pin
G: Ground pin
AIO:Analog I/O pin
DI:Digital input pin
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7. 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
12
dBm
LO Input Power
LOPOW
12
dBm
Storage Temperature
Tstg
125
C
-55
Remarks
Exceeding these maximum ratings may result in damage to the AK1224. Normal operation is not guaranteed at
these extremes.
1. Recommended Operating Range
Table 3 Recommended Operating Range
Parameter
Symbol
Min.
Operating
Temperature
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）=2.2kΩ, VDD=4.75 to 5.25V, Ta=-40C to 85C
Parameter
Min.
Typ.
Max.
Unit
Remarks
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
100
kΩ
IDD (BIAS=22kΩ)
20
26
36
mA
The total current of VDD
IDD (BIAS=27kΩ)
16
21
30
mA
pin, IFOUTP pin and
IDD (BIAS =100kΩ)
4.5
6
8.5
mA
IFOUTN pin.
1
10
uA
IDD (POWERDOWN_H=VDD)
0
RFIN=600MHz, Current Adjustment Resistor=27k
Conversion Gain
3.5
SSB Noise Figure
5.5
7.5
dB
8.5
11
dB
IP1dB
-3
0
dBm
IIP3
13
16
dBm
Design guarantee value
2. Digital Circuit Characteristics
This table is for POWER DOWN_H pin and BIAS SELECT pin.
Parameter
Symbol
Conditions
High level input voltage
Vih
Low level input voltage
Vil
High level input current
Iih
Vih = VDD=5.25V
Low level input current
Iil
Vil = 0V, VDD1=5.25V
MS1413-E-02
MIN
TYP
MAX
Remark
V
0.8VDD
6
Unit
0.2VDD
V
-1
1
A
-1
1
A
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[AK1224]
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. IIP, NF, P1dB, Gain, IDD
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
8
6
20
30
40
50
60
70
80
90
100
20
30
40
R_Bias [kohm]
60
70
80
90
100
80
90
100
R_Bias [kohm]
12
8
10
6
8
Gain [dB]
IP1dB [dBm]
50
6
4
2
4
2
0
0
-2
-2
-4
-4
20
30
40
50
60
70
80
90
100
R_Bias [kohm]
20
30
40
50
60
70
R_Bias [kohm]
30
IDD [mA]
25
20
15
10
5
0
20
30
40
50
60
70
80
90
100
R_Bias [kohm]
Figure 3. Current Adjustment Resistor vs. IIP3, NF, P1dB, Gain, IDD
Note ) A resistor with 5% tolerance are used.
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2.
Over temperature vs. IIP3, NF, P1dB, Gain, IDD
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
6
8
-40
-20
0
20
40
60
-40
80
-20
0
12
40
60
80
60
80
8
10
6
8
Gain [dB]
IP1dB [dBm]
20
Temp [℃]
Temp [℃]
6
4
2
4
2
0
0
-2
-2
-4
-4
-40
-20
0
20
40
60
80
-40
Temp [℃]
-20
0
20
40
Temp [℃]
30
IDD [mA]
25
Resistance for current adjustment
20
22kohm
15
27kohm
10
100kohm
5
0
-40
-20
0
20
40
60
80
Temp [℃]
Figure 4. Over temperature vs. IIP3, NF, IP1dB, Gain, IDD
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3.
Supply voltage vs. IIP3, NF, P1dB, Gain, IDD
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
8
6
4.75
4.85
4.95
5.05
5.15
5.25
4.75
4.85
VDD [V]
5.05
5.15
5.25
5.15
5.25
VDD [V]
12
8
10
6
8
Gain [dB]
IP1dB [dBm]
4.95
6
4
2
4
2
0
0
-2
-2
-4
-4
4.75
4.85
4.95
5.05
5.15
5.25
4.75
VDD [V]
4.85
4.95
5.05
VDD [V]
30
IDD [mA]
25
20
Resistance for current adjustment
15
22kohm
27kohm
10
100kohm
5
0
4.75
4.85
4.95
5.05
5.15
5.25
VDD [V]
Figure 5. Supply voltage vs. IIP3, NF, IP1dB, Gain, IDD
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4.
RF input frequency vs. IIP3, NF, Gain
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
8
12
7
10
8
6
100 200 300 400 500 600 700 800 900
100 200 300 400 500 600 700 800 900
RF [MHz]
RF [MHz]
12
8
10
6
8
Gain [dB]
IP1dB [dBm]
9
6
4
2
4
2
0
0
-2
-2
-4
-4
100 200 300 400 500 600 700 800 900
100 200 300 400 500 600 700 800 900
RF [MHz]
RF [MHz]
Resistance for current adjustment
22kohm
27kohm
100kohm
Figure 6. RF input frequency vs. IIP3, NF, Gain
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[AK1224]
5.
IF input frequency vs. IIP3, NF, Gain
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
8
6
20
30
40
50
60
70
80
90
100
20
30
40
IF [MHz]
60
70
80
90
100
80
90
100
IF [MHz]
12
8
10
6
8
Gain [dB]
IP1dB [dBm]
50
6
4
2
4
2
0
0
-2
-2
-4
-4
20
30
40
50
60
70
80
90
100
20
IF [MHz]
30
40
50
60
70
IF [MHz]
Resistance for current adjustment
22kohm
27kohm
100kohm
Figure 7. IF input frequency vs. IIP3, NF, Gain
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[AK1224]
6.
Lo input power vs. IIP3, NF, Gain
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
8
6
-20
-15
-10
-5
0
5
10
-20
-15
LO Level [dBm]
-5
0
5
10
5
10
LO Level [dBm]
12
8
10
6
8
Gain [dB]
IIP1dB [dBm]
-10
6
4
2
4
2
0
0
-2
-2
-4
-4
-20
-15
-10
-5
0
5
10
-20
-15
-10
-5
0
LO Level [dBm]
LO Level [dBm]
Resistance for current adjustment
22kohm
27kohm
100kohm
Figure 8. Lo input power vs. IIP3, NF, Gain
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7.
Output Load Resistor（RLoad） vs. IIP3, NF, Gain
22
11
10
18
NF [dB]
IIP3 [dBm]
20
16
14
9
8
12
7
10
8
6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
0.8
1.0
1.2
RL [kohm]
12
1.6
1.8
2.0
2.2
1.8
2.0
2.2
8
10
6
8
Gain [dB]
IP1dB [dBm]
1.4
RL [kohm]
6
4
2
4
2
0
0
-2
-2
-4
-4
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
0.8
1.0
RL [kohm]
1.2
1.4
1.6
RL [kohm] Resistance for current adjustment
22kohm
27kohm
100kohm
Figure 9. Output Load Resistor（RLoad） vs. IIP3, NF, Gain
8.
Leakage
RFIN=600MHz,-20dBm, LO input=550MHz,0dBm, RLoad=2.2k, Ta=25℃ VDD=5V
Parameter
RF – LO Leakage
RF – IF Leakage
LO – RF Leakage
LO – IF Leakage
MS1413-E-02
BIAS
Typ.
Unit
22k
-60
dBc
100k
-58
dBc
22k
-59
dBc
100k
-60
dBc
22k
-52
dBc
100k
-55
dBc
22k
-57
dBc
100k
-56
dBc
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[AK1224]
10. Typical Evaluation Board Schematic
1. Typical Evaluation Board Schematic
Figure 10. Typical Evaluation Board Schematic
Note)
The exposed pad at the center of the backside should be connected to ground.
Note)
The open drain output needs power feeding via a inductor. (IFOUTP pin and IFOUTN pin)
Note)
It is necessary to adjust impedance matching as to its setting frequency. (RF input and IF output)
2.
Example of impedance matching
・RFIN
RF Input
C
L
MS1413-E-02
RFIN
AK1224
Frequency[MHz]
C1[pF]
L[nH]
Impedance[ohm]
100
68
220
49.3 - j5.4
600
15
22
48.3 - j0.7
900
12
12
44.48 – j1.0
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[AK1224]
・IFOUT
VDD (Powefeeding for Open-drain Output)
10nF
100pF
Output Load Resistor
RLoad
AK1224
IFOUTP
VSS
BALUN
IF Output
L
R
C
IFOUTN
4:1
L
VSS
Frequency [MHz]
20
50
100
R1 [kohm]
C [pF]
2.2
10
2.2
3.3
2.2
1.2
L [nH]
2200
1000
470
Impedance[ohm]
*1
51.2 – j11.6
*1
51.6 – j0.6
*1
48.6 – j5.7
*1)Murata LQW series
・LOINP/LOINN
LO Input
50ohm
LOINP
10nF
LOINN
AK1224
10nF
VSS
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11. LSI Interface schematic
No.
Name
I/O
Function
1
RFIN
I
RF Input pin
4
LOINN
I
LO Input pins
5
LOINP
6
BIAS1
7
BIAS2
I/O Analog I/O pins
300Ω
11
IFOUTN
12
IFOUTP
O
IF Output pins
IFOUTP
IFOUTN
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[AK1224]
14
Power
I
Digital Input pins
Down_H
15
BIAS Select
300Ω
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12. Application Information
•Impedance matching network with LC
Figure 11. Impedance matching network with LC
Impedance matching network with LC is shown in Figure 11. AK1224 has open drain outputs, so RL1 + RL2 is
output load resistance. C11 and L11 compose lowpass filter. C12 and L12 are for highpass filter. C13 is DC
blocking capacitor and L13 is RF choke. IFOUTP and IFOUTN pins need power feeding via L11, L12 and L13.
The differential voltage from IFOUTP/N can be converted to a single-ended by L11, L12, C11 and C12 properly.
The differential impedance (RL1 + RL2) is converted to single-ended output terminating impedance Ro.
L11, C11, L12 and C12 are calculated as below. fout is IF output frequency.
C11  C12 
L11  L12 
1
2π * f OUT * RL1  RL2 * RO
RL1  RL2 * RO
2π * f OUT
For example, in the case of IF Output = 50MHz, Output Load Resistor (Rload) = 2.2k in 50 interface, L11,
C11, L12 and C12 are calculated as below.
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C11  C12 
1
 9.6pF
2π * 50 *10^6* 2.2 *10^3* 50
L11  L12 
2.2 *10^3* 50
 1056nH
2π * 50 *10^6
L13 and C13 should be large enough not to affect the impedance at IF output frequency. In some cases the
impedance matching can be optimized by L13 and C13.
For example, in the case of IF Output = 50MHz, Output Load Resistor (Rload) = 2.2k in 50 interface, it is
recommended to choose 2200nH and 1000pF as L13 and C13. If any correction is needed, it can be adjusted
by reducing the value of L13 and C13.
These calculated values are approximation. In some cases, some correction is needed due to the effect of
parasitic capacitance of external parts or/and PCBs. The impedance matching network components should be
decided through enough evaluation on AK1224
Typical Performance using impedance matching network with LC is below. RF Input = 600MHz, IF Output =
50MHz, LO Input = 550MHz, Output Load Resistor (Rload) = 2.2k, Vdd = 5V, Ta = 25C, LO Input Level =
0dBm, Current Adjustment Resistor=27k.
MS1413-E-02
Ref.
Value
Size
Part Number
RL1, RL2
1.1k
1005
KOA RK73K1ETP112
L11, L12
1000nH
2012
Murata LQW21HN1R0J00
C11, C12
10pF
1005
Murata GRM1552C1H100JA01
L13
2200nH
2012
Murata LQW21HN2R2J00
C13
150pF
1005
Murata GRM1552C1H151JA01
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[AK1224]
Parameter
Min.
Typ.
Max.
Unit
Conversion Gain
5.1
dB
SSB Noise Figure (NF)
8.6
dB
IP1dB
2.0
dBm
IIP3
16.3
dBm
The phase and amplitude balance is achieved at IF Output frequency by using impedance matching network with
LC. The port-to-port leakage is improved with the phase and amplitude balance is achieved at RF, LO, and IF
frequency with wide band balun.
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・Evaluation Board
Figure 12. AK1224/AK1228 Evaluation Board (Balun)
Figure 13. AK1224/AK1228 Evaluation Board Schematic (Balun)
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Figure 14. AK1224/AK1228 Evaluation Board (matching network with LC)
Figure 15. AK1224/AK1228 Evaluation Board Schematic (matching network with LC)
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13. Outer Dimensions
1 pin marking
(Note 1)
1
4
16
5
13
8
12
9
Figure 16. 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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14. Marking
(a) Style
:
UQFN
(b) Number of pins
:
16
(c) 1 pin marking
:
○
(d) Product number
:
1224
(e) Date code
:
YWWL (4 digits)
Y:
Lower 1 digit of calendar year (Year 2012 → 2, 2013 → 3 ...)
WW :
Week
L:
Lot identification, given to each product lot which is made in a week
 LOT ID is given in alphabetical order (A, B, C…).
1224
(d)
YWWL
(e)
●(c)
Figure 17. Marking
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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.
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and application examples of AKM Products. AKM neither makes warranties or
representations with respect to the accuracy or completeness of the information
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FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE
USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
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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.
MS1413-E-02
25
2014/10
Related Parts
Part#
Discription
Comments
AK1220
100MHz~900MHz High Linearity Down Conversion Mixer
IIP3:+22dBm
AK1222
100MHz~900MHz Low Power Down Conversion Mixer
IDD:2.9mA
AK1224
100MHz~900MHz Low Noise, High Liniarity Down Conversion Mixer
NF:8.5dB, IIP3:+18dBm
AK1228
10MHz~2GHz Up/Down Conversion Mixer
3V Supply, NF:8.5dB
AK1221
0.7GHz~3.5GHz
IIP3:+25dBm
AK1223
3GHz~8.5GHz High Linearity Down Conversion Mixer
Mixer
High Linearity Down Conversion Mixer
IIP3:+13dB, NF:15dB
PLL Synthesizer
AK1541
20MHz~600MHz Low Power Fractional-N Synthesizer
IDD:4.6mA
AK1542A
20MHz~600MHz Low Power Integer-N Synthesizer
IDD:2.2mA
AK1543
400MHz~1.3GHz Low Power Fractional-N Synthesizer
IDD:5.1mA
AK1544
400MHz~1.3GHz Low Power Integer-N Synthesizer
IDD:2.8mA
AK1590
60MHz~1GHz Fractional-N Synthesizer
IDD:2.5mA
AK1545
0.5GHz~3.5GHz Integer-N Synthesizer
16-TSSOP
AK1546
0.5GHz~3GHz Low Phase Noise Integer-N Synthesizer
Normalized C/N:-226dBc/Hz
AK1547
0.5GHz~4GHz Integer-N Synthesizer
5V Supply
AK1548
1GHz~8GHz Low Phase Noise Integer-N Synthesizer
Normalized C/N:-226dBc/Hz
100~300MHz Analog Signal Control IF VGA w/ RSSI
Dynamic Range:30dB
IFVGA
AK1291
integrated VCO
AK1572
690MHz~4GHz Down Conversion Mixer with Frac.-N PLL and VCO
IIP3:24dBm, -111dBc/Hz@100kHz
AK1575
690MHz~4GHz Up Conversion Mixer with Frac.-N PLL and VCO
IIP3:24dBm, -111dBc/Hz@100kHz
IF Reciever (2nd Mixer + IF BPF + FM Detector)
AK2364
Built-in programmable AGC+BPF, FM detector IC
IFBPF:10kHz ~ 4.5kHz
AK2365A
Built-in programmable AGC+BPF, IFIC
IFBPF:7.5kHz ~ 2kHz
Analog BB for PMR/LMR
AK2345
AK2360/
C
AK2360A
CTCSS Filter, Encoder, Decoder
24-VSOP
Inverted frequency(3.376kHz/3.020kHz) scrambler
8-SON
AK2363
MSK Modem/DTMF Receiver
24-QFN
AK2346B
0.3-2.55/3.0kHz Analog audio filter,
Emphasis, Compandor, scrambler, MSK Modem
24-VSOP
0.3-2.55/3.0kHz Analog audio filter
Emphasis, Compandor, scrambler, CTCSS filter
24-VSOP
AK2346A
AK2347B
AK2347A
24-QFN
24-QFN
Function IC
AK2330
8-bit 8ch Electronic Volume
VREF can be selected for each
channel
AK2331
8-bit 4ch Electronic Volume
VREF can be selected for each
channel
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, please make inquiries the
sales office of AKM or authorized distributors as to current status of the Products.
2014/10