AKM AK1291 If variable gain amplifier with rssi Datasheet

[AK1291]
AK1291
IF Variable Gain Amplifier with RSSI
1. Overview
AK1291 is a variable gain amplifier with a power detector. It’s operating frequency ranges from
100MHz to 300MHz. The gain control adopts an analog signal control, and the gain characteristic is dB
linear. The gain control range is -9dB to +21dB and a dynamic range is 30dB. AK1291 has single-ended
input and output, with impedance of 50 Ω. As a typical characteristic, NF is 7dB (at maximum gain) , and
IMD3 is 70dBc at output power of -15dBm ,at frequency of 165MHz.The power supply voltage is 4.75V
to 5.25V.
2. Feature
▪Operation Frequency Range
▪Gain variable range
▪Noise Figure
▪IMD3
▪Supply Voltage
▪Operating Temperature
▪Package
100MHz to 300MHz
-9dB to 21dB
7dB @max gain
70dBc @output power -15dBm
4.75V to 5.25V
-40°C to +85°C
24pin QFN0404
3. Block Diagram
VSS6
COM
VSS5
IAVDD
OAVD
VSS4
VSS1
VSS3
RFINP
RFOUT
Buffer
RFINN
PVDD
DETVDD
GCON
Detector
DETIN
VSS2
BIAS
ENAB
DETOUT
Fig 1. Block Diagram
MS-E-1148-00
2012/11
-1-
[AK1291]
Content
1. Overview ................................................................................................................. 1
2. Feature ..................................................................................................................... 1
3. Block Diagram ........................................................................................................ 1
4. Pin Configuration .................................................................................................... 3
5. Pin function Description.......................................................................................... 4
6. Maximum Absolute Rating ..................................................................................... 5
7. Recommended operational condition...................................................................... 5
8. Electrical Characteristic ........................................................................................... 6
9. Interface circuit........................................................................................................ 8
10. Evaluation Board Schimatic.................................................................................. 10
11. Typical Performance ............................................................................................. 11
12. Marking ................................................................................................................. 13
13. Outer Dimensions.................................................................................................. 14
MS-E-1148-00
2012/11
-2-
[AK1291]
VSS1
1
RFINP
2
RFINN
3
PVDD
4
GCON
5
VSS2
6
VSS5
OAVDD
VSS4
23
22
21
20
19
11
12
TEST3
TEST4
Fig 2
10
TEST2
9
TEST1
BIAS
8
ENAB
7
IAVDD
24
COM
TOP VIEW
VSS6
4. Pin Configuration
18
VSS3
17
RFOUT
16
DETVD
15
DETIN
14
DETOU
13
TEST5
Pin Configuration
5. Block Function
Block
VGA
Power Detector
Function
Variable Gain Amplifier which is controlled by the voltage of 0.2 to 2.5V
Power detector which detect power level of VGA output
MS-E-1148-00
2012/11
-3-
[AK1291]
6. Pin function Description
Pin No
1
2
3
4
5
6
Table 1. Pin function
function
Name
VSS1
RFINP
RFINN
PVDD
GCON
VSS2
I/O
G
AI
AI
P
AI
G
7
BIAS
AIO
8
ENAB
DI
Power down control
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TEST1
TEST2
TEST3
TEST4
TEST5
DETOUT
DETIN
DETVDD
RFOUT
VSS3
VSS4
OAVDD
VSS5
IAVDD:
DI
DI
DI
DI
DO
AO
AI
P
AO
G
G
P
G
P
23
COM
AIO
24
VSS6
G
Test pin
Test pin
Test pin
Test pin
Test pin
Detector output
Detector input
Power supply
RF output
Ground
Ground
Power supply
Ground
Power supply
Pin for input common
voltage
Ground
Ground
RF input Positive
RF input Negative
Power Supply
Control voltage input
Ground
Resistance connection
pin for current adjustment
Remark
No resistance is connected.
ENAB=”High” Power on
ENAB=”Low” Power down
Connect to ground
Connect to ground
Connect to ground。
Connect to ground
Connectionless
connect a capacitor of 10pF to ground
connect a resistor of 50Ω to ground
connect a capacitor of 10nF to ground
The exposed pad at the center of the
backside should be connected to ground.
Note) the exposed pad at the center of the backside should be connected to ground.
AI:Analog input pin
AO:Analog output pin DI: Digital Input pin DO:Digital Output pin
P: Power supply pin
G: Ground pin
25
EXPAD
G
Ground
*About power down control: The power down of the whole IC is done by ENAB (pin8). In the case that ENAB
is “High”, VGA block and Detector block are power on state. In the case that let only Detector block power
down, connect DETVDD to the ground.
MS-E-1148-00
2012/11
-4-
[AK1291]
7. Absolute Maximum Rating
Table 2. Absolute Maximum rating
項目
記号
Min.
Max.
単位
Supply Voltage
VDD
-0.3
5.5
V
Ground Level
VSS
0
0
V
Analog input voltage
VAIN
-0.3
VDD+0.3
V
VDIN
-0.3
VDD+0.3
RFINP/RFINN
Pmax
+10
Maximum input Level
Storage
Tstg
-55
125
Temperature
Note1) All voltage reference ground Level: 0V
V
備考
Applied to [PVDD]、[IAVDD]、
[OAVDD]、[DETVDD] note1)
Applied to [VSS1]、[VSS2] 、
[VSS3] 、[VSS4] 、[VSS5] 、
[VSS6] and [EXPAD]
Applied to [RFINP]、[RFINN]、
[GCON] and [DETIN]
Applied to [ENAB] note1)
dBm
°C
Exceeding these maximum ratings may result in damage to the AK1291. Normal operation is not
guaranteed at these extremes
8. Recommended operational condition
Table 3. Recommended operational condition
項目
Operating
Temperature
記号
Ta
Min.
Typ.
-40
Max.
単位
85
°C
備考
Applied to [PVDD]、
[IAVDD]、[OAVDD]、and
[DETVDD]
Each specification is applied in the power supply voltage and the operating temperature applied to
recommended operational condition.
Supply
Voltage
VDD
4.75
5
5.25
MS-E-1148-00
V
2012/11
-5-
[AK1291]
9. Electrical Characteristic
DC Characteristic
Item
High Level Input Voltage
Low Level Input Voltage
Input leak current
Symbol
VIH
VIL
IIL
Current consumption 1
ICC1
Current consumption 2
ICC2
Current consumption 3
ICC3
Condition
Note1)
Note1)
Note1)
PVDD=OAVDD=IAVDD=
DETVDD=VDD,
ENAB=High
PVDD=OAVDD=IAVDD
=VDD、DETVDD=VSS、
ENAB=High
PVDD=OAVDD=IAVDD
=VDD、DETVDD=VSS、
ENAB=Low
Min.
0.8*VDD
0.0
-10
Typ.
Max.
0.2*VDD
10
Unit
V
V
µA
155
199
mA
151
195
mA
10
µA
Note1) Applied to [ENAB] pin。
AC Characteristic
PVDD=OAVDD=IAVDD=4.75V~5.25V, Ta=-40°C~85°C f0=165MHz, unless otherwise specified
Item
Symbol
Condition
Min.
Typ.
Max.
VGA Block
Input Frequency
FOP
100
300
Input Impedance
IIMP
50
Output Impedance
OIMP
50
Gain control Range
GCONT
30
Max. Gain
GMAX
GCON=2.5V
21
Min. Gain
GMIN
GCON=0.2V
-6.5
Gain 1
Ga1
GCON=2V
21
Gain 2
Ga2
GCON =0.5V
-9
Gain control voltage
VGT
0.2
2.5
range
Gain curve slope
GCS
1
20
80
0.5V≦VGCONT≦2.0V
note1)
Gain step response
GSR
5
<RFIN=100MHz>
Noise Figure note2)
NF
Gain = 21 dB
7
Output P1dB
OP1
5
IMD3
IMD3
Output Level = -15dBm
65
70
<RFIN=165MHz>
Noise Figure note2)
NF
Gain = 21 dB
7
Output P1dB
OP1
5
IMD3
IMD3
Output Level = -15dBm
65
70
<RFIN=300MHz>
Noise Figure note2)
NF
Gain = 21 dB
7
Output P1dB
OP1
5
IMD3
IMD3
Output Level = -15dBm
55
60
MS-E-1148-00
Unit
MHz
Ω
Ω
dB
dB
dB
dB
dB
V
dB/V
µS
dB
dBm
dBc
dB
dBm
dBc
dB
dBm
dBc
2012/11
-6-
[AK1291]
Detector Block
Input Frequency range
Output voltage Level 1
Output voltage Level 2
Temperature
dependency note 2)
FOP2
Det_H
Det_H
Detvdev
100
DETIN=-15dBm
DETIN=-35dBm
Refer to 25°C
0.5
1.6
0.9
±1
500
2.2
MHz
V
V
dB
Note1) guaranteed monotonicity
Note2) guaranteed by design
MS-E-1148-00
2012/11
-7-
[AK1291]
10. Interface circuit
Pin No
2
Pin Name
RFINP
3
RFINN
5
GCON
I/O
I
RF input
I
Interface circuit
Analog Input
300Ω
7
BIAS
23
COM
17
RFOUT
I/O Analog Input/Output
300Ω
O
RF output
MS-E-1148-00
2012/11
-8-
[AK1291]
Pin No.
8
Pin Name
ENAB
I/O
I
Digital input Pull-Down
9
TEST1
10
TEST2
11
TEST3
12
TEST4
13
TEST5
O
Digital output
14
DETOUT
O
Output
Interface Circuit
300Ω
100kΩ
300Ω
15
DETIN
I
RF input
MS-E-1148-00
2012/11
-9-
[AK1291]
11. Evaluation Board Schimatic
VDD
0.1uF
1nF
VDD
1nF
0.1uF
IINPUT
10nF
VDD
0.1uF
VSS4
OAVD
VSS5
IAVD
COM
VSS6
1nF
VSS1
VSS3
RFINP
RFOUT
RFINN
DETVDD
PVDD
DETIN
GCON
DETOUT
VSS2
TEST5
10nF
IOUTPUT
10nF
1nF
0.1uF
Detector
INPUT
1nF
10nF
TEST4
TEST3
TEST2
TEST1
ENAB
BIAS
51Ω
Detector
OUTPUT
10pF
Gain
Control
VDD
Fig 3. Typical Evaluation Board Schimatic
MS-E-1148-00
2012/11
- 10 -
[AK1291]
12. Typical Performance
Unless otherwise noted,
PVDD=OAVDD=IAVDD=DETVDD=5V, Ta=25℃, Freq=165MHz
1. Gain vs Analog Controll Voltage
Fig.4-1 Gain VS Control Voltage(fo=100MHz)
Fig.4-1 Gain VS Control Voltage(fo=165MHz)
Fig.4-1 Gain VS Control Voltage(fo=300MHz)
MS-E-1148-00
2012/11
- 11 -
[AK1291]
2. Noise Figure
Fig.5-1 NF VS Gain
Fig.5-2 NF VS Gain (fo=165MHz)
(Temp =25°C)
3. IMD3
Fig.6-1 IMD3 VS Gain
Fig.6-2 IMD3 VS Gain
(Temp =25°C)
MS-E-1148-00
(fo=165MHz)
2012/11
- 12 -
[AK1291]
13. Marking
(a) Style
:
QFN
(b) Number of pins
:
24
(c) 1 pin marking:
○
(d) Product number
:
1291
(e) Date code
:
YWWL (4 digits)
Y:
Lower 1 digit of calendar year (Year 2013 → 3, 2014 → 4 ...)
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…).
1291
YWWL
(d)
(e)
●(c)
MS-E-1148-00
2012/11
- 13 -
[AK1291]
14. Outer Dimensions
HWQFN24-4×4-0.5
Note) the exposed pad at the center of the backside should be connected to ground.
MS-E-1148-00
2012/11
- 14 -
[AK1291]
IMPORTANT NOTICE
z
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. Asahi
Kasei Microdevices Corporation (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.
z
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.
z
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:
z
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.
MS-E-1148-00
2012/11
- 15 -
Similar pages