RF1236
BROADBAND MEDIUM POWER DIFFERENTIAL
SP3T SWITCH
Package Style: QFN, 12-Pin, 2.0mmx2.0mmx0.55mm
RF1_P
RF1_N
Features




Broadband Frequency Performance
Low Frequency - 3.5GHz
RF2_P
RF2_N
Very Low Insertion Loss:
0.3dB Typ. at 0.90GHz
0.55dB Typ. at 1.90GHz
COM_P
COM_N
RF3_P
RF3_N
Excellent Linearity Performance:
IIP2 Typ. 103dBm at 0.90GHz
IIP2 Typ. 100dBm at 1.90GHz
V1
1.8V Capable for Low Power
Applications
Applications



Multi-Mode GSM, W-CDMA Applications

WLAN Applications

SAW Filter Switching
V3
Functional Block Diagram
Cellular Handset Applications
IEEE802.11b/g WLAN Applications
V2
Product Description
The RF1236 is a single-pole three-throw (SP3T) differential switch
designed for general purpose switching applications which require very
low insertion loss and low power signal routing applications. The RF1236
features low insertion loss, high linearity, and very good harmonic characteristics. The switch is operable from 1.8V to 3.6V control voltage. It is fabricated with 0.5m GaAs pHEMT process and is packaged in a very
compact 2.0mmx2.0mm, 12-pin, leadless QFN package.
Ordering Information
RF1236
RF1236PCBA-410
Broadband Medium Power Differential SP3T Switch
Fully Assembled Evaluation Board
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MEMS
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
DS110418
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
1 of 9
RF1236
Absolute Maximum Ratings
Parameter
Rating
Unit
V1, V2, V3
6.0
V
Maximum Input Power (DC to
3.5GHz, 1.8V Control)
31
dBm
Operating Temperature
-30 to +85
°C
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
Storage Temperature
-65 to +100
°C
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any
infringement of patents, or other rights of third parties, resulting from its use. No
license is granted by implication or otherwise under any patent or patent rights of
RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice.
Parameter
Min.
Specification
Typ.
Max.
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied.
Unit
Condition
V1, V2, V3=High=3.0V,
V1, V2, V3=Low=0V. Temp=25°C.
Overall - Vcontrol_high =3V
Operating Frequency
600
DC Supply
1.8
3500
MHz
3.6
V
V1, V2, V3 (H)
0.40
V
V1, V2, V3 (L)
6
uA
0.30
0.47
dB
RF ON, 824MHz to 960MHz;
0.55
0.70
dB
RF ON, 1850MHz to 1990MHz
0.64
1.2
dB
RF ON, 2170MHz to 2500MHz
0.73
1.35
dB
RF ON, 2500MHz to 3500MHz
3.0
0.00
Control Current
0.4
Insertion Loss
COM_P - RF1P, RF2P, RF3P
COM_N - RF1N, RF2N, RF3N
Isolation
RF1P - RF2P, RF3P
RF1N - RF2N, RF3N
COM_P - RF2P RF3P
COM_N - RFIN, RF2N, RF3N
25.5
27.0
dB
RF ON, 824MHz to 960MHz
20
21
dB
RF ON, 1850MHz to 1990MHz
18.0
19.5
dB
RF ON, 2170MHz to 2500MHz
15.5
18.0
dB
RF ON, 2500MHz to 3500MHz
25
27
dB
RF ON, 824MHz to 960MHz
19.5
21.0
dB
RF ON, 1850MHz to 1990MHz
18
19
dB
RF ON, 2170MHz to 2500MHz
15.0
17.5
dB
RF ON, 2500MHz to 3500MHz
62
93
dBc
PIN =16dBm; F0 =880MHz
PIN =16dBm; F0 =1880MHz
RF Port Return Loss
Second Harmonic
Third Harmonic
2 of 9
1.5:1
VSWR
62
88
dBc
62
84
dBc
PIN =16dBm; F0 =2500MHz
62
97.5
dBc
PIN =16dBm; F0 =880MHz
62
97
dBc
PIN =16dBm; F0 =1880MHz
62
94
dBc
PIN =16dBm; F0 =2500MHz
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110418
RF1236
Parameter
Min.
Specification
Typ.
Max.
Unit
Overall - Vcontrol_high =3V
(continued)
Condition
V1, V2, V3=High=3.0V,
V1, V2, V3=Low=0V. Temp=25°C.
IIP2
RF1, RF2, RF3-COM (Cell)
103
dBm
Tone 1: 836.5MHz at 16dBm, Tone 2:
1718MHz at -20dBm, Receive Freq: 881.5MHz
RF1, RF2, RF3-COM (AWS)
100
dBm
Tone 1: 1732.5MHz at 16dBm, Tone 2:
3865MHz at -20dBm, Receive Freq:
2132.5MHz
RF2, RF3-COM (PCS)
100
dBm
Tone 1: 1880MHz at 16dBm, Tone 2:
3840MHz at -20dBm, Receive Freq:
1960MHzRF1,
RF1, RF2, RF3-COM (Cell)
68
dBm
Tone 1: 836.5MHz at 16dBm, Tone 2:
791.5MHz at -20dBm, Receive Freq:
881.5MHz
RF1, RF2, RF3-COM (IMT)
66
dBm
Tone 1: 1950MHz at 16dBm, Tone 2:
1760MHz at -20dBm, Receive Freq: 2140MHz
IIP3
IP0.1 dB
Switching Speed
26
dBm
0.27
s
50% control to 90% RFON
0.40
s
50% control to 10% RFOFF
V1, V2, V3=High=1.8V,
V1, V2, V3=Low=0V. Temp=25°C.
Overall - Vcontrol_low =1.8V
Operating Frequency
600
3500
MHz
0.30
0.45
dB
RF ON, 824MHz to 960MHz
0.57
0.73
dB
RF ON, 1850Mhz to 1990MHz
0.65
1.2
dB
RF ON, 2170MHz to 2500MHz
0.75
1.35
dB
RF ON, 2500MHz to 3500MHz
Insertion Loss
COM_P - RF1P, RF2P, RF3P
COM_N - RF1N, RF2N, RF3N
Isolation
RF1P - RF2P, RF3P
RF1N - RF2N, RF3N
COM_P - RF1P, RF2P, RF3P
COM_N - RF1N, RF2N, RF3N
RF Port Return Loss
DS110418
25
27
dB
RF ON, 824MHz to 960MHz
19.5
21.0
dB
RF ON, 1850MHz to 1990MHz
18
19
dB
RF ON, 2170MHz to 2500MHz
15.5
17.5
dB
RF ON, 2500MHz to 3500MHz
25.0
26.5
dB
RF ON, 824MHz to 960MHz
19.0
20.5
dB
RF ON, 1850MHz to 1990MHz
18
19
dB
RF ON, 2170MHz to 2500MHz
15.0
17.5
dB
RF ON, 2500MHz to 3500MHz
1.5:1
VSWR
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
3 of 9
RF1236
Parameter
Min.
Specification
Typ.
Unit
Max.
Overall - Vcontrol_low =1.8V
(continued)
Condition
V1, V2, V3=High=1.8V,
V1, V2, V3=Low=0V. Temp=25°C.
Second Harmonic
62
78
dBc
PIN =16dBm; F0 =880MHz
62
78
dBc
PIN =16dBm; F0 =1880MHz
PIN =16dBm; F0 =2500MHz
62
74
dBc
62
68
dBc
PIN =16dBm; F0 =880MHz
62
75
dBc
PIN =16dBm; F0 =1880MHz
62
68
dBc
PIN =16dBm; F0 =2500MHz
RF1, RF2, RF3-COM (Cell)
83
dBm
Tone 1: 836.5MHz at 16dBm, Tone 2:
1718MHz at -20dBm, Receive Freq: 881.5MHz
RF1, RF2, RF3-COM (AWS)
82
dBm
Tone 1: 1732.5MHz at 16dBm, Tone 2:
3865MHz at -20dBm, Receive Freq:
2132.5MHz
RF1, RF2, RF3-COM (PCS)
83
dBm
Tone 1: 1880MHz at 16dBm, Tone 2:
3840MHz at -20dBm, Receive Freq: 1960MHz
RF1, RF2, RF3-COM (Cell)
46
dBm
Tone 1: 836.5MHz at 16dBm, Tone 2:
791.5MHz at -20dBm, Receive Freq:
881.5MHz
RF1, RF2, RF3-COM (IMT)
46
dBm
Tone 1: 1950MHz at 16dBm, Tone 2:
1760MHz at -20dBm, Receive Freq: 2140MHz
IP0.1dB
19.5
dBm
Switching Speed
0.34
s
50% Control to 90% RFON
1.16
s
50% Control to 90% RFOFF
Third Harmonic
IIP2
IIP3
Control Logic
Control Signals
VC1
Valid States
Invalid
States
VC2
Signal Paths
VC3
RF1N - COM_N
RF1P - COM_P
RF2P - COM_P,
RF2P - COM_P
RF3N - COM_N,
RF3P - COM_P
1
0
0
ON
OFF
OFF
0
1
0
OFF
ON
OFF
0
0
1
OFF
OFF
ON
0
0
0
Indeterminate State*
0
1
1
Indeterminate State*
1
0
1
Indeterminate State*
1
1
0
Indeterminate State*
1
1
1
Indeterminate State*
0: Logic level low, 0V~0.4V
1: Logic level high, 1.6V~3.6V
Note: In indeterminate states, both signal paths are ON with degraded performance.
4 of 9
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110418
RF1236
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Function
RF1_P
RF1_N
VC1
VC3
RF3_N
RF3_P
VC2
RF2_N
RF2_P
COM_P
GND
COM_N
Description
Positive RF Port 1.
Negative RF Port 1.
Voltage Control 1.
Voltage Control 3.
Negative RF Port 3.
Positive RF Port 3.
Voltage Control 2.
Negative RF Port 2.
Positive RF Port 2.
Positive Common Port.
Ground.
Negative Common Port.
Package Drawing
DS110418
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 9
RF1236
COM_N
GND
COM_P
Pin Out
12
11
10
RF1_P 1
9 RF2_P
RF1_N 2
8 RF2_N
6 of 9
4
5
6
RF3_N
RF3_P
7 VC2
VC3
VC1 3
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110418
RF1236
Application Schematic
RF1_N
RF1_P
50  strip
50  strip
100 pF
100 pF
VC1
3
VC3
RF3_N
RF3_P
2
1
4
50  strip
100 pF
50  strip
100 pF
50  strip
12
COM_N
100 pF
5
11
6
10
7
8
50  strip
COM_P
100 pF
9
VC2
100 pF
50  strip
RF2_N
DS110418
100 pF
50  strip
RF2_P
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
7 of 9
RF1236
Typical Performance
Isolation
(Temp=25°C, VRF=2.35V)
Isolation
(Temp=25°C, VRF=1.8V)
0
0
-10
-10
-20
-20
Isolation (dB)
Isolation (dB)
-30
-30
-40
-40
-50
400 600 800 10001200 1400 1600180020002200 2400260028003000
-50
400 600 800 10001200 1400 1600180020002200 2400260028003000
Frequency (MHz)
Frequency (MHz)
Ant Port Return Loss
(Temp=25°C, VRF=1.8V)
Ant Port Return Loss
(Temp=25°C, VRF=2.35V)
0
0
-10
-10
-20
-20
Return
Loss (dB)
Return
Loss (dB)
-30
-30
1.8v RF1_N
1.8v RF1_P
1.8v RF2_N
1.8v RF2_P
1.8v RF3_N
1.8v RF3_P
-40
-50
400 600 800 10001200 1400 1600180020002200 2400260028003000
-50
400 600 800 10001200 1400 1600180020002200 2400260028003000
Frequency (MHz)
Frequency (MHz)
Max Insertion Loss
(Temp=25°C, VRF=1.8V)
0.0
Max Insertion Loss
(Temp=25°C, VRF=2.35V)
0.0
1.8v RF1_N
1.8v RF1_P
1.8v RF2_N
1.8v RF2_P
1.8v RF3_N
1.8v RF3_P
-0.1
-0.2
-0.3
-0.2
-0.3
-0.4
Insertion
Loss (dB)
-0.5
-0.5
-0.6
-0.6
-0.7
-0.7
-0.8
-0.8
-0.9
-0.9
-1.0
400 600 800 10001200 1400 1600180020002200 2400260028003000
Frequency (MHz)
8 of 9
2.35v RF1_N
2.35v RF1_P
2.35v RF2_N
2.35v RF2_P
2.35v RF3_N
2.35v RF3_P
-0.1
-0.4
Insertion
Loss (dB)
2.35v RF1_N
2.35v RF1_P
2.35v RF2_N
2.35v RF2_P
2.35v RF3_N
2.35v RF3_P
-40
-1.0
400 600 800 10001200 1400 1600180020002200 2400260028003000
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110418
RF1236
Typical Performance
Harmonics
(Temp=25°C, F0=1880MHz, VRF=2.35V)
Harmonics
(Temp=25°C, F0=1880MHz, VRF=1.8V)
0
0
-10
-10
-20
-20
-30
-30
-40
-40
Harmonic -50
Level (dBc)
Harmonic -50
Level (dBc)
-60
-60
-70
-70
2Fo
3Fo
-80
-80
2Fo
-90
-90
3Fo
-100
-100
10
11
12
13
14
15
16
17
18
19
20
21
10
22
11
12
13
Output Power versus Input Power
(Temperature=25°C, Frequency=880MHz, VRF=1.8V)
22
22
20
20
16
14
17
18
19
20
21
22
16
14
12
12
10
10
8
10
11
12
13
14
15
16
17
18
19
20
21
22
10
11
12
13
Input Power PIN (dBm)
14
15
16
17
18
19
20
21
22
Input Power PIN (dBm)
Output Power versus Input Power
(Temperature=25°C, Frequency=1880MHz, VRF=1.8V)
Output Power versus Input Power
(Temperature=25°C, Frequency=1880MHz, VRF=2.35V)
22
22
20
20
18
18
Output
Power
POUT
(dBm)
16
14
16
14
12
12
10
10
8
8
10
11
12
13
14
15
16
17
18
Input Power PIN (dBm)
DS110418
16
18
Output
Power
POUT
(dBm)
8
Output
Power
POUT
(dBm)
15
Output Power versus Input Power
(Temperature=25°C, Frequency=880MHz, VRF=2.35V)
18
Output
Power
POUT
(dBm)
14
Input Power (dBm)
Input Power (dBm)
19
20
21
22
10
11
12
13
14
15
16
17
18
19
20
21
22
Input Power Pin (dBm)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
9 of 9