DATA SHEET
SKY66111-21: Low-Power Bluetooth® Low Energy
Front-End Module for Range Extension Applications
Applications
VBIAS CTX CRX
Range extender
VCC
Wearable technology
Beacons
Sensors
TR
Home automation
ANT
Internet of Things (IoT) devices
Features
204671-001
Low power consumption: 10 mA @ +10 dBm
Figure 1. SKY66111-21 Functional Block Diagram
Output: +6 to +13 dBm (single-pin controllable)
Supply operation: 1.8 to 5 V
Description
Low sleep current: < 1 μA
The SKY66111-21 is a highly integrated front-end module (FEM)
designed for Bluetooth Low Energy (BLE) range extension
applications operating in the 2.4 to 2.485 GHz range.
RX bypass
Small MCM (20-pin, 3.3 x 3.0 x 0.7 mm) package
(MSL3, 260 °C per JEDEC-J-STD-020)
BIAS
CTX
GND
CRX
GND
GND
Skyworks GreenTM products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of GreenTM, document number
SQ04–0074.
20
19
18
17
16
15
14
VCC
13
GND
3
12
GND
4
11
ANT
GND
1
GND
2
GND
TR
5
6
7
8
9
10
GND
GND
GND
GND
GND
GND
Paddle
The device is provided in a 3.3 x 3.0 x 0.7 mm 20-pin MCM
package. A functional block diagram is shown in Figure 1. Pin
assignments are shown in Figure 2. Signal pin assignments and
functional pin descriptions are provided in Table 1.
204671-002
Figure 2. SKY66111-21 Pinout (Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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1
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Table 1. SKY66111-21 Signal Descriptions1
Pin
Name
Description
Pin
Name
Description
1
GND
Ground
11
ANT
Antenna port
2
GND
Ground
12
GND
Ground
3
GND
Ground
13
GND
Ground
4
TR
Common receive/transmit port
14
VCC
Positive power supply
5
GND
Ground
15
GND
Ground
6
GND
Ground
16
GND
Ground
7
GND
Ground
17
CRX
RX control signal
8
GND
Ground
18
GND
Ground
9
GND
Ground
19
CTX
Tx control signal
10
GND
Ground
20
BIAS
PA bias current input, connect to CTX through a resistor
1 The paddle should be connected to ground. See Figure 6.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY66111-21 are provided
in Table 2. The recommended operating conditions are specified
in Table 3.
Electrical specifications are provided in Tables 4 through 8.
Table 2. SKY66111-21 Absolute Maximum Ratings1
Parameter
Symbol
Minimum
Maximum
Units
Supply voltage
VCC
5.5
V
Control voltages
VCTX, VCRX
5.0
V
Bias voltage
VBIAS
5.0
V
RF Input power
PIN
+20
dBm
Voltage standing wave ratio
VSWR
10:1
Operating temperature
TA
-40
+85
°C
Storage temperature
TSTG
-65
+150
°C
Electrostatic discharge:
ESD
150
V
Human Body Model (HBM), Class 0
1 Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters
set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
ESD HANDLING: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device.
This device must be protected at all times from ESD when handling or transporting. Static charges may easily produce
potentials of several kilovolts on the human body or equipment, which can discharge without detection.
Industry-standard ESD handling precautions should be used at all times.
Table 3. Recommended Operating Conditions
Parameter
Symbol
Min
Frequency
f
2.4
Supply voltage
VCC
1.8
Control voltages
VCTX, VCRX
Bias voltage
VBIAS
Operating temperature
TA
Typ
Max
Units
2.485
GHz
3
5.0
V
1.7
3
VCC
V
1.25
1.8
VCC
V
25
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°C
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Table 4. SKY66111-21 Electrical Specifications: DC Characteristics1
(VCC = VCTX = 3.3 V, VBIAS = 1.8 V, VCRX = 0 V, TA = +25 C, RBIAS (R1) = 0 kΩ, Characteristic Impedance [ZO] = 50 Ω,
Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
RX current (bypass)
ICQ_RX
RX mode
1
μA
TX quiescent current2
ICQ_TX
TX mode
6
mA
8.5
10
10.5
11
mA
mA
mA
mA
550
μA
TX mode (PIN = -1 dBm):
TX operating current2
IOP_TX
TX bias current (BIAS pin)
IBIAS_TX
Sleep current3
ICC_OFF
VCC = 1.8 V
VCC = 3.0 V
VCC = 3.3 V
VCC = 5.0 V
Sleep mode
0.1
1
μA
1 Performance is guaranteed only under the conditions listed in this table.
2 For total current, IBIAS_TX should be added to the values.
3 VCTX = VBIAS = 0 V.
Table 5. SKY66111-21 Electrical Specifications Transmit Characteristics1
(VCC = VCTX = 3.3 V, VBIAS = 1.8 V, VCRX = 0 V, TA = +25 C, PIN = -1 dBm, RBIAS (R1)= 0 kΩ, Characteristic Impedance [ZO] = 50 Ω,
Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
+8
+10
+10.3
+10.8
dBm
dBm
dBm
dBm
dB
Output power
POUT
VCC = 1.8 V
VCC = 3.0 V
VCC = 3.3 V
VCC = 5.0 V
Saturated gain2
G_SAT
PIN = -1 dBm
11
Gain slope
GSLOPE
Over frequency range
0.7
Input return loss
S11
-14
dB
Output return loss
S22
-10
dB
Insertion loss (sleep mode) 2
S21_SLEEP
Third order input intercept point2
IIP3
Third order output intercept point2
OIP3
-15
1
-12
dB
dB
@ 2.44 GHz, Δ f = ± 1 MHz,
PIN = -14 dBm/tone
+5
dBm
@ 2.44 GHz, Δ f = ± 1 MHz,
PIN = -14 dBm/tone
+16
dBm
1 dB input compression point
IP1dB
-1
dBm
1 dB output compression point
OP1dB
+10
dBm
2
nd
to 10 harmonics2
th
2fo to 10fo
-30
dBm/MHz
RX to TX transition time2
tSWITCH
10% to 90% RF
50% VCTX to 90% RF
500
ns
TX power on time2
tON
10% to 90% RF
50% VCTX to 90% RF
500
ns
TX power off time2
tOFF
90% to 10% RF
50% VCTX to 10% RF
150
ns
1 Performance is guaranteed only under the conditions listed in this table.
2 Guaranteed by characterization.
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DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Table 6. SKY66111-21 Electrical Specifications: Receive Characteristics1
(VCC = 3.3 V, VCRX = 3.3 V, VCTX = 0 V, TA = +25 C, PIN = -20 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted)
Parameter
Symbol
Insertion loss
S21
Isolation
S12
Input return loss
S11
Output return loss
S22
TX to RX transition time2
RX power on time2
RX power off time2
Test Condition
Min
TX Mode (PIN = -20 dBm)
Typ
Max
Units
0.9
dB
25
dB
-15
dB
-15
dB
tSWITCH
10% to 90% RF
50% VCRX to 90% RF
500
ns
tON
10% to 90% RF
50% VCRX to 90% RF
150
ns
tOFF
90% to 10% RF
50% VCRX to 10% RF
150
ns
1 Performance is guaranteed only under the conditions listed in this table.
2 Guaranteed by characterization.
Table 7. SKY66111-21 Electrical Characteristics: Logic Characteristics (TA = +25 C)
Parameter
Voltage logic high1
Voltage logic low
Symbol
Minimum
Maximum
Units
VHIGH
1.7
5
V
VLOW
0
0.2
V
1 Difference between logic high voltages for VCRX and VCTX should not exceed 0.2 V.
Table 8. SKY66111-21 Mode Logic Truth Table
Mode
Sleep mode
CTX
CRX
BIAS
0
0
0
Receive (RX) mode
0
1
0
Transmit (TX) mode
1
0
11
Non-permissible state2
1
1
x
1 Analog voltage control for PA output power. See Figure 3.
2 This state will enable both the TX and RX paths. It is not permitted to operate in this state.
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DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
BIAS Pin Usage
The BIAS pin can also be used to adjust the SKY66111-21 output
power when the RF source (transceiver or baseband) has a fixed
level.
14
12
12
10
10
8
–4 dBm
–1 dBm
0 dBm
4 dBm
6
4
1.2
1.5
1.8
2.1
2.4
2.7
3
8
1.3 V
1.4 V
1.5 V
6
4
-10
3.3
-8
-6
-4
VBIAS (V)
2
4
6
8
10
12
14
12
14
Figure 4. Gain vs POUT & VBIAS (VCC = 3.3 V)
25
40
35
1.3 V
1.4 V
1.5 V
1.6 V
1.8 V
2.0 V
2.5 V
3.3 V
1.3 V
1.4 V
1.5 V
30
1.6 V
1.8 V
2.2 V
2.5 V
3.3 V
25
PAE (%)
15
10
20
15
0
-10
-5
0
5
10
Output Power (dBm)
Figure 5. ICC vs POUT & VBIAS (VCC = 3.3 V)
15
204671-006
10
5
204671-005
ICC + IBIAS (mA)
0
2.5 V
3.3 V
Output Power (dBm)
Figure 3. POUT vs VBIAS & PIN (VCC = 3.3 V)
20
-2
1.6 V
1.8 V
2.0 V
204671-004
Gain (dB)
14
204671-003
POUT (dBm)
The SKY66111-21 BIAS pin supplies the bias to the internal PA.
By varying the voltage at this pin, PA operating parameters
including gain, supply current, and efficiency can be adjusted.
5
0
-10
-8
-6
-4
-2
0
2
4
6
8
10
Output Power (dBm)
Figure 6. Power-Added Efficiency vs POUT & VBIAS (VCC = 3.3 V)
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DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
In many applications, a variable DC supply voltage may not be
available. The desired bias voltage can be generated by
connecting BIAS to the GPIO controlling CTX with a resistor (refer
to Figure 12). With no RF input, the BIAS pin draws approximately
10% of the main supply current. Toggling BIAS from the CTX GPIO
2.5
also causes the PA to turn off when CTX is pulled low, reducing
the RX and shutdown mode current.
Table 9 lists the relationship between bias voltage/current and
bias resistance.
25
3.3
3
IBIAS (mA)
2
20
ICC (mA)
15
1
10
VBIAS (V)
1.5
ICC (mA)
IBIAS (mA)
2.7
2.4
2.1
1.8
0.5
204671-008
5
1.5
0
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
VBIAS (V)
2.4
2.7
0
3.3
3
204671-007
Figure 7. IBIAS and ICC vs VBIAS (VCC = 3.3 V, no RF)
1.2
0
3
6
9
12
15
18
21
24
RBIAS (kΩ)
Figure 8. VBIAS vs RBIAS (Vcc = 3.3 V)
Table 9. Bias Voltage and Current vs Bias Resistance (VCC = 3.3 V)
RBIAS (k)
VBIAS (V)
IBIAS (mA)
0
3.30
2.09
0.47
2.65
1.41
1
2.28
1.03
1.5
2.07
0.82
2.2
1.90
0.64
3.3
1.78
0.48
4.7
1.62
0.36
6.8
1.52
0.26
10
1.44
0.19
15
1.37
0.13
22
1.32
0.09
33
1.29
0.06
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30
33
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
If a fixed BIAS voltage (for example, from an LDO) is available in
the application circuit, using this instead of a resistor reduces the
variation of output power with VCC. To minimize SKY66111-21
current consumption in RX bypass and shutdown modes, the
voltage to the BIAS pin should be switched off when the CTX is
logic low.
14
2.5 V
3.3 V
12
POUT (dBm)
1.6 V
1.8 V
2.0 V
10
8
6
4
1.2
204671-009
POUT (dBm)
12
1.3 V
1.4 V
1.5 V
1.5
1.8
2.1
2.4
2.7
VCC (V)
Figure 9. POUT vs VCC & VBIAS (PIN = −1 dBm)
3
3.3
0Ω
470 Ω
1000 Ω
1500 Ω
2200 Ω
3300 Ω
4700 Ω
6800 Ω
10000 Ω
15000 Ω
22000 Ω
33000 Ω
10
8
6
4
1.2
204671-010
14
1.5
1.8
2.1
2.4
2.7
3
3.3
VCC (V)
Figure 10. POUT vs VCC & RBIAS (PIN = −1 dBm)
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7
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Evaluation Board Description
The SKY66111-21 Evaluation Board is used to test the
performance of the SKY66111-21 front-end module. The board is
optimized for evaluation, experimentation, and investigation with
a Bluetooth Low Energy signal source. The design and layout can
be quickly and easily transferred into a production design.
An Evaluation Board schematic is provided in Figure 11. A
reference design schematic is provided in Figure 12. Table 10
provides the Bill of Materials (BOM) list for Evaluation Board
components. A photograph of the Evaluation Board is shown in
Figure 13.
Evaluation Board Setup Procedure
Connect Supply
Measure Performance
TX
Monitor the 2.4 GHz amplifier performance by applying an RF
signal to connector J4 (TR) and verify the output power on
connector J1 (ANT).
RX
Monitor the 2.4 GHz switch performance by applying an RF signal
to connector J1 (ANT) and verify the output signal on connector J4
(TR).
CAUTION: Be careful not to overdrive the switch by applying too
much RF on the input to the device. A starting input
power of -20 dBm is suitable.
1. Connect J1 and J4 to 50 instruments. Terminate all unused
ports (if applicable) with 50 .
2. Connect the supply ground to Pins 1, 4, and 6 of J2.
3. Connect 3.3 V to pin 7 of J2.
4. Connect 1.8 V to one of the logic pins (pin 3 or pin 5) on J2 to
select RX or TX mode. For TX mode, also connect pin 2 to
1.8 V. Connect the other logic pin to ground. Refer to Table 8
for mode control settings.
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DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
J2
1
BIAS
2
CTX
C6
DNI
R1
0Ω
3
4
C4
DNI
CRX
R5
0Ω
5
6
C5
DNI
VCC
7
15
GND
16
GND
17
CRX
18
GND
19
CTX
GND
C3
1 μF
GND 12
R4
0Ω
ANT 11
GND
R3
0Ω
SMA
J1
C2
DNI
C1
DNI
10
GND
9
6
5
GND
TR
GND
4
SMA
J4
GND 13
SKY66111-21
U1
8
3
GND
GND
2
VCC 14
GND
7
1
GND
R6
DNI
BIAS
C7
DNI
20
R2
DNI
204671-011
CRX
CTX
Figure 11. SKY66111-21 Evaluation Board Schematic
15
GND
16
GND
17
CRX
18
GND
19
SKY66111-21
U1
GND
VCC 14
VCC
GND 13
C3
1 μF
GND 12
L4
2.7 nH
ANT 11
GND
R3
0Ω
C1
1 pF
SMA
J1
C2
1 pF
10
GND
9
GND
8
7
5
GND
TR
GND
4
GND
GND
3
GND
6
2
CTX
20
1
TX-RX
R5
0Ω
R2 (RBIAS)
0Ω
BIAS
Note: Include a footprint for R2 to
enable compatibility with both
the SKY66110-11 and the SKY66111-21
204671-012
Figure 12. SKY66111-21 Reference Design Schematic
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204671B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • May 15, 2018
9
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Table 10. SKY66111-21 Evaluation Board Bill of Materials (BOM)
Component
C1, C2
Value
Size
Manufacturer
Mfr Part Number
Characteristics
DNI
0201
C3
1 μF
0402
C4, C5, C6
DNI
0402
J1, J4
SMA
end launch
Johnson Components
142-0701-851
SMA end launch straight jack
receptacle - tab contact
J2
7X1
100 mil
Samtec
TSW-107-07-G-S
100 mil header
Skyworks Solutions Inc.
Z720-B
Capacitor
PCB1
Z720-B
R2, R6
DNI
0201
PCB
R1 (RBIAS), R3, R4, R5
0Ω
0201
Panasonic
ERJ1GE0R00
Thick film chip resistor
U1
SKY66111-21
MCM50P300X330-20
Skyworks Solutions Inc.
SKY66111-21
Low-power Bluetooth Low Energy
ranger extender
Do not install
Figure 13. SKY66111-21 Evaluation Board
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DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Package Dimensions
Package and Handling Information
The PCB layout footprint for the SKY66111-21 is provided in
Figure 14. Typical part markings are shown in Figure 15.
Package dimensions are shown in Figure 16, and tape and reel
dimensions are provided in Figure 17.
Since the device package is sensitive to moisture absorption, it
is baked and vacuum packed before shipping. Instructions on
the shipping container label regarding exposure to moisture
after the container seal is broken must be followed. Otherwise,
problems related to moisture absorption may occur when the
part is subjected to high temperature during solder assembly.
The SKY66111-21 is rated to Moisture Sensitivity Level 3
(MSL3) at 260 C. It can be used for lead or lead-free soldering.
For additional information, refer to the Skyworks Application
Note, PCB Design and SMT Assembly/Rework Guidelines for
MCM-L Packages, document number 101752.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
3.6 mm
Pin 20
Package Outline
Pin 1 Indicator
0.2 x 0.2
Pin 1
Pitch 0.5 mm
3.3 mm
2X 0.85 mm
Exposed Center Pad
Stencil aperture size of 80% to 100%
of the module/package solder
mask openings
2X 0.85 mm
20X 0.5 mm
20X 0.25 mm
Stencil Aperture
Pin 20
3.7 mm
Pin 20
3.6 mm
Package
Outline
Pin 1
Pitch 0.5 mm
0.5 mm Pitch
Pitch 0.6 mm
Package Outline
Pin 1 Indicator
0.2 x 0.2
Pin 1
3.4 mm
3.3 mm
6X 0.25 mm
Thermal via array
ø0.3 mm on 0.6 mm pitch
improves thermal performance
2X 0.85 mm
Exposed Center Pad
Opening size of 60% to 100%
of the exposed center opening shown
6X 0.5 mm
0.25 mm Min
0.6 mm Pitch
20X 0.6 mm
20X 0.35 mm
2X 0.85 mm
Solder Mask Opening
Metallization
Notes:
1. All dimensions are in millimeters, unless otherwise specified.
2. Thermal vias should be resin filled and capped in accordance with IPC-4761Type VII vias.
Recommended Cu thickness is 30 to 35 μm.
204671-014
Figure 14. PCB Layout Footprint
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11
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Pin 1
Indicator
66111-21
XXXXXXX
YYWW CC
204671-015
Skyworks Part Number
Lot Code
Date/Country Code:
YY = Calendar Year
WW = Week
CC = Country Code
Figure 15. Typical Part Markings
Figure 16. SKY66111-21 Package Dimensions
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May 15, 2018 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 204671B
.50
4.00 ±0.10
2.00 ±0.05
+0
–0 .10
.00
3.75 ±0.05 (Bo)
A
Pin 1 Location
A
5° Max
4.00 ±0.10
B
Ø1.50
12.00 ±0.20
B
Ø1
5.50 ±0.05
0.25 ±0.05
1.75 ±0.10
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
±0.10
1.05 ±0.05 (Ko)
Detail B
5° Max
Notes:
1. Carrier tape must meet all requirements of Skyworks GP01-D233 procurement spec
for tape and reel shipping.
2. Carrier tape material: black conductive polycarbonate.
3. Cover tape material: transparent conductive material.
4. ESD surface resistivity shall be ≤ 1 x 1010 Ohms/square per EIA, JEDEC TNR specification.
5. 10 -sprocket hole pitch cumulative tolerance on tape: ±0.20 mm.
6. Ao and Bo measured on plane 0.30 mm above the bottom of the pocket.
7. All dimensions are in millimeters.
3.20 ±0.05 (Ao)
Detail A
204671-017
Figure 17. SKY66111-21 Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
204671B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • May 15, 2018
13
DATA SHEET • SKY66111-21: LOW-POWER BLUETOOTH LOW ENERGY FEM
Ordering Information
Part Number
Product Description
Evaluation Board Part Number
®
SKY66111-21
SKY66111-21: Low-Power Bluetooth Low Energy Front-End Module for
Range Extension Applications
SKY66111-21EK1
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