200122H.pdf

data sheet
SKY65006-348LF: 2.4–2.5 GHz WLAN/Zigbee®
Power Amplifier
Features
Block Diagram
2.4–2.5 GHz operation
WLAN/Zigbee® applications
l Advanced GaAs HBT process
l Integrated output power detector and F2 filter
l Low voltage positive bias supply (3.3 V)
l Low quiescent current: 50 mA
l 27 dB small signal gain
l 802.11g linear power: 18 dBm (includes integrated filter loss)
l 802.11b mask-compliant power: 21 dBm (includes integrated
filter loss)
l 802.15.4 mask-compliant power: 15.4 dBm (includes integrated
filter loss)
l Low-cost plastic package QFN 16-pin (3 x 3 x 0.75 mm)
l Lead (Pb)-free, and RoHS-compliant
l
N/C
N/C
VCC
N/C
l
16
15
14
13
1
RF IN
2
N/C
N/C
12
N/C
11
RF OUT/VCC
3
10
RF OUT/VCC
4
9
VDETOUT
LPF
5
6
7
8
VBCC
VREG1
VREG2
VDCC
QFN-16 (3 x 3 mm)
Description
The SKY65006-348LF is a linear, high-gain two-stage power
amplifier with integrated output power detector and second
harmonic (F2) filter, designed for low voltage operations. This
device is manufactured on an advanced Gallium Arsenide
(GaAs), Heterojunction Bipolar Transistor (HBT) process. It is
designed for power amplifier applications in WLAN, Zigbee®,
and spread spectrum systems from 2.4–2.5 GHz. The amplifier is packaged in a QFN-16, 3 x 3 x 0.75 mm package.
NEW
N/C
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
Pin 1
Indicator
0.008 (0.20 mm)
Ref.
0.118
(3.00 mm)
0.001
(0.02 mm)
+0.03
-0.02
(0.001 mm)
0.118
(3.00 mm)
0.030 (0.75 mm)
± 0.002 (0.05 mm)
0.057 (1.45 mm)
± 0.004 (0.10 mm)
Exposed Pad
0.029
(0.73 mm)
0.059
(1.500 mm)
0.057 (1.45 mm)
± 0.004 (0.10 mm)
0.059 (1.500 mm)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
1
Data Sheet • SKY65006-348LF
Pin Assignments
Absolute Maximum Ratings
PinSymbolDescription
1, 3, 4, 12, N/C
13, 15, 16
No connect
2
RF IN
RF input
5
VBCCDC control voltage input that sets bias to the first
and second amplifier stages.
Characteristic
Value
Supply voltage (VCC)
5 V
Supply current (ICC)
500 mA
Regulator supply voltage (VREG1 & VREG2)
< VCC V
Operating temperature (TC)
-40 °C to +85 °C
-55 °C to +125 °C
6
VREG1DC control voltage input to regulate the current to
the first amplifier stages.
Storage temperature(TST)
7
VREG2DC control voltage input to regulate the current to
the 2nd amplifier stage.
RF input power (PIN)
10 dBm
Junction temperature (TJ)
150 °C
8
VDCC
Reference voltage input to power detector.
9
VDET
Power detector output voltage.
10, 11
14
Center
RF OUT/VCCRF outputs and supply voltage inputs to second
amplifier stage. These pins must be connected
directly together for current sharing.
VCC
DC supply voltage input to the first amplifier stage.
GNDEquipotential point. Connect package backside
center paddle to the printed circuit board common
via the lowest possible impedance.
DC Voltage Control Table
Mode
VCC
VREG(1)
VBCC
VDCC
RF IN-RF OUT
3.3 V
3.0 V
3.3 V
3.0 V
Performance is guaranteed only under the conditions listed in the specifications table and is
not guaranteed under the full range(s) described by the Absolute Maximum specifications.
Exceeding any of the absolute maximum/minimum specifications may result in permanent
damage to the device and will void the warranty. Each absolute maximum rating listed is an
individual parameter. Biasing and driving the amplifier with more than one absolute maximum
rating listed may result in permanent damage to the device. Exposure to maximum rating
conditions for extended periods may reduce device reliability.
CAUTION: A lthough this device is designed to be as robust as
possible, ESD (Electrostatic Discharge) can damage
this device. This device must be protected at all
times from ESD. Static charges may easily produce
potentials of several kilovolts on the human body or
equipment, which can discharge without detection.
Industry-standard ESD precautions must be employed
at all times.
1. Voltage applied at evaluation board DC pins.
General RF Transmit Electrical Specifications
TC = 25 °C, VCC = 3.3 V, VREG = 3 V, VDCC = 3 V
ParameterSymbol
Frequency range
Gain
Gain variation over frequency
Condition
F
lS21l
Small signal
Min.Typ.
Max.
Unit
2400
2500
MHz
26
27
dB
0.2
dB
Small signal
27
dB
Small signal
6.5
dB
CW
24
dBm
CW at P1 dB
-35
dBm
dBm
l∆S21l
Small signal
Input return loss
lS11l
Output return loss
lS22l
Output P1 dB
2nd harmonic
P1 dB
F2
23
3rd harmonic
F3
CW at P1 dB
-49
Detector voltage
VDET
POUT = 10 dBm, 802.11g modulation
0.4
V
Noise figure
NF
Small signal
6.2
7
dB
PAE @ P1 dB
PAE
CW at P1 dB
29
%
Quiescent current
ICQ
(No RF signal )
53
mA
Reference current
IREF
(No RF signal)
6
mA
ICC @ P1 dB
ICC
at P1 dB
265
mA
2
26
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
Data Sheet • SKY65006-348LF
802.11g Electrical Specifications
OFDM Modulation, 54 Mbps, TC = 25 °C, VCC = 3.3 V, VREG = 3 V, VDCC = 3 V
ParameterSymbol
Linear power at 2.442 GHz
Condition
Min.Typ.
Max.
Unit
POUT
54 Mbps at 3.5% EVM
17
dBm
Current consumption ICC
54 Mbps at linear power
130
mA
Detector voltage
VDET
54 Mbps at linear power
1
V
802.11b Electrical Specifications
CCK Modulation, 11 Mbps, TC = 25 °C, VCC = 3.3 V, VREG = 3 V, VDCC = 3 V
ParameterSymbol
Compliant power at 2.442 GHz
Condition
Min.Typ.
Max.
Unit
POUT
11 Mbps
21.5
dBm
Current consumption ICC
11 Mbps at compliant power
190
mA
Detector voltage
VDET
11 Mbps at compliant power
1.4
V
802.11b data is taken with a raised cosine filter and an alpha factor of 0.7.
802.15.4 Electrical Specifications
Zigbee® O-QPSK Modulation, 250 Kb/s, TC = 25 °C, VCC = 3.3 V, VREG = 3 V, VDCC = 3 V
ParameterSymbol
Condition
Min.Typ.
Max.
Unit
Compliant power at 2.442 GHz
POUT
250 Kb/s @ PIN = -12 dBm
15.4
dBm
Power at 2.442 GHz
POUT
250 Kb/s @ PIN = -2 dBm
25
dBm
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
3
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
-40 °C
28.0
25 °C
85 °C
27.2
27.0
26.8
26.6
28
27
26
25
26.4
24
23
26.0
3.0
3.3
0
3.6
5
10
15
20
25
30
VCC (V)
Power Out (dBm)
small signal Gain vs. VCC across temperature
Gain vs. Power Out across temperature
28.0
3.0 V
3.3 V
3.6 V
3.0 V
29
27.8
3.3 V
3.6 V
28
27.6
27.4
27
27.2
Gain (dB)
Small Signal Gain (dB)
85 °C
29
27.4
26.2
27.0
26.8
26
25
26.6
26.4
24
26.2
26.0
2.400
23
2.425
2.450
2.475
2.500
0
5
10
15
20
25
30
Frequency (GHz)
Power Out (dBm)
small signal Gain vs. Frequency across VCC
Gain vs. Power Out across VCC
28.0
-40 °C
25 °C
85 °C
27.8
2.90 V
3.10 V
30
2.95 V
3.15 V
3.00 V
3.20 V
3.05 V
3.25 V
27.6
29
27.4
27.2
28
27.0
Gain (dB)
Small Signal Gain (dB)
25 °C
30
27.6
Gain (dB)
Small Signal Gain (dB)
27.8
26.8
26.6
26.0
2.400
27
26
26.4
26.2
25
2.425
2.450
2.475
2.500
VCC (V)
Small Signal Gain vs. Frequency across temperature
4
-40 °C
31
24
0
5
10
15
20
25
Power Out (dBm)
Gain vs. Power Out across VReG
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
30
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
lS21l
lS11l
30
lS22l
PAE @ P1 dB (%)
lS11l, lS21l, lS22l (dB)
0
-10
-20
-30
-40
29.2
29.0
28.8
28.6
28.4
28.2
-60
28.0
2.400
0
1
2
3
4
5
6
7
8
9
10 11 12
2.425
2.450
2.475
2.500
Frequency (GHz)
Frequency (GHz)
S-Parameters vs. Frequency
Pae @ P1 dB vs. Frequency across VCC
-40 °C
25 °C
85 °C
-40 °C
40
-20
25 °C
85 °C
35
-21
30
PAE @P1dB (%)
-22
|S11| (dB)
29.4
-50
-19
-23
-24
-25
-26
-27
25
20
15
10
5
-28
3.0
3.3
0
2.400
3.6
2.450
2.475
2.500
VCC (V)
|s11| vs. VCC across temperature
Pae @ P1 dB vs. Frequency across temperature
25 °C
85 °C
-5.0
0.06
-5.5
0.05
ICCQ (A)
0.07
-6.0
-6.5
0.02
0.01
3.6
85 °C
0.03
-7.5
3.3
25 °C
0.04
-7.0
-8.0
-40 °C
0.08
-4.5
3.0
2.425
Frequency (GHz)
-40 °C
-4.0
|S22| (dB)
3.6 V
29.6
10
-29
3.3 V
29.8
20
3.0 V
30.0
0.00
3.0
3.3
VCC (V)
VCC (V)
|s22| vs. VCC across temperature
ICCQ vs. VCC across temperature
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
3.6
5
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
-40 °C
40
25 °C
85 °C
35
PAE @ P1 dB (%)
PAE (%)
25
20
15
10
3.6 V
25
20
15
10
5
5
0
0
0
5
10
15
20
25
0
30
5
10
15
20
25
30
Power Out (dBm)
Power Out (dBm)
Pae @ P1 dB vs. Power Out across temperature
Pae @ P1 dB vs. Power Out across VCC
-40 °C
-25
25 °C
85 °C
2nd Harmonic Power (dBm)
-35
-40
-45
-50
-55
-60
-65
3.0 V
-25
-30
2nd Harmonic Power (dBm)
3.3 V
30
30
3.3 V
3.6 V
-30
-35
-40
-45
-50
-55
-60
-65
-70
0
5
10
15
20
25
-70
30
0
5
10
15
20
25
30
Power Out (dBm)
POUT (dBm)
2nd harmonic vs. Power Out across temperature
2nd harmonic vs. Power Out across VCC
-40 °C
25 °C
85 °C
-50
-55
-60
-65
-70
0
5
10
15
20
25
30
3.0 V
-45
3rd Harmonic Power (dBm)
3rd Harmonic Power (dBm)
-45
6
3.0 V
35
3.3 V
3.6 V
-50
-55
-60
-65
-70
0
5
10
15
20
25
30
Power Out (dBm)
Power Out (dBm)
3rd harmonic vs. Power Out across temperature
3rd harmonic vs. Power Out across VCC
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
-40 °C
25 °C
85 °C
7.5
26.0
7.0
25.5
6.5
6.0
5.5
5.0
4.5
25 °C
85 °C
25.0
24.5
24.0
23.5
23.0
22.5
4.0
22.0
3.0
3.3
3.6
3.0
3.1
3.2
3.3
3.4
3.5
3.6
VCC (V)
VCC (V)
Noise Figure vs. VCC across temperature
Output P1 dB vs. VCC across temperature
3.0 V
3.3 V
3.6 V
3.0 V
6.8
3.3 V
3.6 V
25.5
6.7
25.0
6.6
6.5
P1 dB (dBm)
Noise Figure (dB)
-40 °C
26.5
Output P1 dB (dBm)
Noise Figure (dB)
8.0
6.4
6.3
24.5
24.0
23.5
6.2
23.0
6.1
6.0
2.400
2.425
2.450
2.475
22.5
2.400
2.500
2.450
2.475
2.500
Frequency (GHz)
Frequency (GHz)
Noise Figure vs. Frequency across VCC
Output P1 dB vs. Frequency across VCC
-40 °C
25 °C
85 °C
-40 °C
8
25 °C
85 °C
26.0
7
25.5
6
5
P1 dB (dBm)
Noise Figure (dB)
2.425
4
3
25.0
24.5
24.0
2
23.5
1
0
2.400
2.425
2.450
2.475
2.500
23.0
2.400
2.425
2.450
2.475
2.500
Frequency (GHz)
Frequency (GHz)
Noise Figure vs. Frequency across temperature
Output P1 dB vs. Frequency across temperature
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
7
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
-40 °C
25 °C
-40 °C
85 °C
0.35
85 °C
0.0075
0.30
IREF (A)
0.25
ICC (A)
25 °C
0.0085
0.40
0.20
0.15
0.10
0.0065
0.0055
0.0045
0.05
0
0
10
20
0.0035
30
0
10
20
30
Power Out (dBm)
Power Out (dBm)
ICC vs. Power Out across temperature
IReF vs. Power Out across temperature
3.0 V
3.3 V
3.6 V
3.0 V
0.40
3.3 V
3.6 V
0.0085
0.35
0.0075
0.30
IREF (A)
ICC (A)
0.25
0.20
0.0065
0.0055
0.15
0.10
0.0045
0.05
0
0
10
2.9 V
3.1 V
0.35
20
0.0035
30
0
10
20
30
Power Out (dBm)
Power Out (dBm)
ICC vs. Power Out across VCC
IReF vs. Power Out across VCC
2.95 V
3.15 V
3.0 V
3.2 V
3.05 V
3.25 V
2.9 V
3.1 V
0.0085
2.95 V
3.15 V
3.0 V
3.2 V
3.05 V
3.25 V
0.3
0.0075
0.2
IREF (A)
ICC (A)
0.25
0.15
0.0065
0.0055
0.1
0.0045
0.05
0
8
0
10
20
30
0.0035
0
10
20
Power Out (dBm)
Power Out (dBm)
ICC vs. Power Out across VReG
IReF vs. Power Out across VReG
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
30
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
-40 °C
12
25 °C
85 °C
10
VDET (V)
EVM (%)
8
6
4
2
0
0
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
POUT (dBm)
eVM vs. Modulated Power Out across
temperture 802.11g, 54 Mbps, 64 QaM
detector Voltage vs. Power Out
802.11g , 54 Mbps, 64 QaM
2412 GHz
2442 GHz
2462 GHz
3.0 V
3.3 V
20
3.6 V
12
10
8
8
EVM (%)
10
6
6
4
4
2
2
0
0
0
20
Modulated Power Out (dBm)
12
EVM (%)
2
VDET
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2
4
6
8
10
12
14
16
18
20
0
0
2
4
6
8
10
12
14
16
18
20
Modulated Power Out (dBm)
Modulated Power Out (dBm)
eVM vs. Modulated Power Out across Frequency
802.11g, 54 Mbps, 64 QaM
eVM vs. Modulated Power Out across VCC
802.11g, 54 Mbps, 64 QaM
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
9
Data Sheet • SKY65006-348LF
Typical Performance Data
VCC = VBCC = 3.3 V, VREF = VDCC = 3 V, ZO = 50 W, TC = 25 °C, Frequency = 2.442 GHz unless otherwise noted
POUT
29
0.195
0.194
28
0.193
27
0.192
26
0.191
25
0.190
24
0.189
23
0.188
22
0.187
21
0.186
20
2412
2424
2436
2448
2460
2472
0.185
2484
Frequency (MHz)
Ref 18 dBm
Att 25 dB
0
1 AP
CLRWR
GAT
-20
TRG
-30
-40
-50
-60
-70
3DB
-80
tx Channel
Bandwidth 2.632 MHz
adjacent Channel
Bandwidth 1 MHz
Spacing
4 MHz
Applications Circuit
A
-10
Center 2.445 GHz
POUt, Gain, and ICC vs. Frequency
802.11b, CCK, 11 Mbps
* RBW 100 kHz
* VBW 30 kHz
SWT 65 ms
10
ICC (mA)
POUT (dBm), Gain (dB)
ICC
Gain
30
1 MHz /
Span 10 MHz
Power
15.37 dBm
Lower
Upper
-27.59 dBm
-27.25 dBm
Zigbee® 802.15.4, Spectral Mask, O-QPSK, 250 Kb/s
F = 2.445 Ghz, Channel Power = 15.4 dBm
RF IN
C1
Channel Absolute Power Spectral Density at Mask Limit (absolute limit of -30 dBm
with |f-fc| > 3.5 MHz with 100 MHz resolution bandwidth).
Optional
L3
C8
VCC
5
C5
4
NC
VBCC
3
NC
2
1
NC
NC 16
6
NC 15
SKY65006-348LF
7
R1
VREG
C3
R2
8
C9
C7
R3
NC 13
NC
VDCC
9
VDET
L1
14
10
11
C2
12
L2
C4
C6
C10
L4
Optional
C11
RF OUT
10
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected]ksinc.com • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
Data Sheet • SKY65006-348LF
Evaluation Board
SKY65006
EN18-D730
REV 3
RFIN
GND
VCC
+
VREG
C1
+
R2
C9
C5
R3
C7 C10
C11
VDET
L3
1
R1
GND
GND
C8
C3
L1
C4
C2
L2
+
C6
L4
VCC 3.3V
VREG 3.0V
RFOUT
Board Layout
Bill of Material for Evaluation Board
Part # ID
Size
Value
Units
1
C1
0402
5.6
pF
Murata
GRM1555C1H5R6CZ01E
2
C2
0402
5.6
pF
Murata
GRM1555C1H5R6CZ01E
3
C3
0402
10K
pF
Murata
GRM155R71E103KA01
4
C4
0402
10K
pF
Murata
GRM155R71E103KA01
5
C5
0402
1.8
pF
Murata
GRM1555C1H1R8CZ01D
6
C6
0603
4.7
µF
Panasonic
ECST1AZ475R
7
C7
0402
4.7
pF
Murata
GRM1555C1H4R7CZ01E
8
C8
1206
10
µF
AVX
TAJA106M006R
9
C9
1206
10
µF
AVX
TAJA106M006R
10
C10
0402
1
pF
Murata
GRM1555C1H1R0CZ01E
11
C11
0402
1
pF
Murata
GRM1555C1H1R0CZ01E
12
L1
0402
22
nH
TDK
MLK1005S22NJT000
13
L2
0402
22
nH
TDK
MLK1005S22NJT000
14
L3
0402
2.2
nH
TDK
MLK1005S2N2ST000
15
L4
0402
2.2
nH
TDK
MLK1005S2N2ST000
16
R1
0402
180
Ω
Panasonic
ERJ2GEJ181X
17
R2
0402
240
Ω
Panasonic
ERJ2GEJ241X
18
R3
0402
51K
Ω
19
PCB
Manufacturer
Product Number
Panasonic
ERJ2GEJ513X
Metro circuits
EN18-D730
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
11
Data Sheet • SKY65006-348LF
Test Board Biasing Procedure
Application Information
1. Connect the RF input and output ports as labeled on the
engineering evaluation board.
2. Set the input power level from a CW signal generator to
approximately -25 dBm.
3. Apply ground connection from DC voltage supply to all
GND pins before applying any voltage.
4. Adjust the power supply to 3.3 V and set the current limit to
400 mA. Apply voltage to the pin labeled VCC and note that
there is no current draw from the supply. Be sure to apply
the voltage to VCC before applying any other voltages to the
test board.
5. Adjust a second power supply output to 3.0 V and set the
current limit to 30 mA. Apply voltage to the pin labeled VREG
and VDCC. Note that the current draw for VREG is approximately 10 mA.
6. Observe that the current on the VCC supply is in the range
of the quiescent current specification. The SKY65006
should be approximately 50 mA.
7. Observe that the small signal gain is within the range specified. The SKY65006 should be in the range of 27 dB. This
should verify the proper working conditions for this device,
and further testing can proceed.
8. To observe the detector voltage output, connect a voltmeter
or oscilloscope to the VDET pin on the evaluation test board.
Set the signal source to CW mode and increase power until
the output voltage begins to increase. The nominal offset
voltage with low or no signal inputs should be approximately
50–200 mV and should increase monotonically to approximately 700–1000 mV, when driven at an output level of
approximately 18 dBm. The evaluation circuit contains an
external 51K Ω resistor and an equivalent capacitance of
10 pF to ground.
9. Bias the unit off by first removing the VREG power supply and
finally remove the connection to the VCC power supply.
The Skyworks SKY65006 is a high-performance 2-stage InGaP
power amplifier designed for 2.4–2.5 GHz ISM, IEEE802.11b,
802.11g WLAN and Zigbee® band applications. The SKY65006
is a high-efficiency linear amplifier designed for single 3.3 V
supply operation, requiring no input and output matching components for 50 Ω operation. This device also includes an internal
power detector and integrated harmonic filter for reduced PC
board component count. The integrated low pass filter is also
highly effective in reducing harmonics at their source by localizing harmonic rejection to a tiny portion of the PA chip. This
significantly reduces the risk of radiation from a high order filter
design external to the amplifier. Filtering of harmonics in this way
may eliminate the need for an external shield over the PA, and
reduces overall cost. If additional suppression of harmonics is
required, an external low pass filter can be added to the output of
the amplifier. Optional shunt inductor, L3, is included on the applications board at the input of the amplifier to improve the return
loss. The typical performance data shown includes these optional
components.
12
The SKY65006 requires a nominal VCC supply voltage of 3.3 V
and a positive control voltage VREG1, 2 providing bias for the
first and second stage amplifiers. Nominal control voltage, VREG,
is 2.5–2.6 V resulting from the stack of two emitter-base junctions of about 1.3 V each for typical GaAs HBT device. To insure
proper reference currents into VREG1, 2, for normal operation of
the RF stages, drop-in resistors could be used between VREG1, 2
and a VREG supply. Bias control would then be set in the range of
2.7–3.5 V allowing added flexibility for both the control voltage
value and desired RF stage currents. If additional output power is
required, VCC can also be increased 4.0 V. Biasing of each stage
consists of an external resistor of 180 Ω (R1) and 240 Ω (R2) for
the recommended typical bias currents of 15 mA and 35 mA for
stage 1 and 2 respectively. In most applications one end of each
of the bias resistors is tied to the VREG supply, so both amplifier
stages are biased with a single common voltage. Capacitor C5,
1.8 pF, bypasses the VREG stage 1 control bias pin and is used to
improve RF rejection of the bias control lines.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
Data Sheet • SKY65006-348LF
Although there is no need for external matching when operating
in a 50 Ω system, an input and output 6 pF decoupling capacitor
is shown on the evaluation circuit. This capacitor is only mandatory on the RF output side of the device. The RF input is DC
isolated and could be connected to driver circuits directly without
the need for additional blocking capacitors. Capacitors of 5.6 pF
were chosen because their self-resonant frequency would not
add any unwanted disturbances in the 50 Ω transmission line
path. The SKY65006 is unconditionally stable at any frequency
and voltage setting as long as it is grounded correctly. It is
extremely important to pay special attention to the RF grounding
pad under the device. Ground pad vias and solder mask patterns are designed in such a way to ensure minimum parasitic
inductance to the underlying ground and at each RF bypassing
component. To ensure reliable soldering of the device paddle, it
is highly recommended that filled vias with a minimal reliable
diameter and filling the entire pattern be used. The filled-via
technique would remove the possibility of solder migration down
via holes, which can cause a large increase in inductance and
possible instabilities.
The SKY65006 also includes an on-board, compensated power
detector providing a single-ended output voltage for measuring
power over a wide dynamic range. The detector load and
settling time constant are set external to the device. Nominal
detector load is 51K Ω and 5 pF, yielding a settling time of
approximately 500 ns. Note that there is an internal 5 pF onchip capacitance, so the net capacitance value is approximately
10 pF. Lower resistor values may be used if necessary with
the net impact being a lower output detector voltage over its
useful dynamic range. For proper detector operation, a reference
voltage must be applied to the VDET line. Any voltage between 2
and 4 V is acceptable for the reference voltage, but it is recommended to supply VDET from the VREG power supply. The benefit
in doing
this is that the approximate 2 mA of current that the reference
circuit consumes will not be wasted with the PA in the “Off”
state. There is also the option of not biasing the detector reference if the current consumption is of prime importance, but the
detector will then act as a normal unbiased detector, and
sensitivity and accuracy will be degraded.
Each amplifier stage is biased through a series choke and shunt
capacitor combination which is completely integrated on chip to
provide maximum RF isolation and harmonic radiation immunity.
To avoid interferences from the low-frequency gain of the amplifier and to insure stability at low out of band frequencies, stage
1 amplifier is biased through inductor L1. It is also then shunted
by a large value capacitance to ensure proper low-frequency
bypassing of the amplifier. To avoid a shunting effect on the
50 Ω line, a high-impedance, self-resonating choke L2 (in the
range of 22–33 nH depending on vendor and size) and a large
value bypass capacitor are used for biasing the output stage.
Capacitor C6, 4.7 µF, on the VCC line should be placed as close
as possible to the biasing network supplying stage 2 or the
output stage of the amplifier. Applications with the DC bias being
generated strictly from a battery as the voltage source may not
require this capacitor, or as large a value as specified in the
applications circuit. However, in that case, a smaller ceramic
capacitor of at least 0.1 µF should be used and also placed
as close as possible to the biasing network supplying stage 2.
Capicator C9 affects amplifier turn-on time. Reduce the
value of C9 to decrease turn-on time as long as bias stability
is not compromised.
The evaluation circuit board is constructed as a four-layer FR4
stack with an overall thickness of 0.062 inches (1.57 mm). Top
layer dielectric is 0.01-inch thick with 50 Ω transmission line
widths of 0.0195 inches. The printed circuit board is constructed
using a symmetrical 0.01-inch stack on the top and bottom
layers and with a 0.032-inch thick pre-preg core. All components
are 0402 in size with the exception of the 4.7 µF and 10 µF tantalum capacitors. Please note the 10 µF capacitors are installed
to provide low frequency filtering for lab testing. Actual values,
if necessary, will be dependent upon layout and circuit environment. All ground vias used are 0.012 inches in diameter and
placed as close to the ground ends of by-passing components
as possible. Four vias are used under the device to create a low
inductance path to ground. If a smaller diameter is to be used, or
if the substrate thickness is greater than 0.01 inches, additional
vias must be placed under the device to reduce the potential risk
of parasitic oscillation.
Note: Normal operation requires that VCC including VBCC be
applied before the application of the VREG voltages biasing stage
1 and 2 bias currents. If VCC and VBCC are not applied prior to
the application of the VREG biasing, voltage damage could occur
from excessive base current draw through the collector junction
of the bias transistor.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
13
Data Sheet • SKY65006-348LF
Device Branding Specifications
Evaluation Board Stack-Up
Pin 1
Indicator
MSK-NS
TRA-NS
Via Plating
Thru Both Boards
See Note 3
Circuit Board
See Note 1a
Pin 1
0.254
Ref.
1.5747 ± 0.127
Pin 16
S006
XXXX
YXX
Skyworks P/N
Lot #
Date Code
Y = Calendar Year
WW = Week
Top View
Copper Side
of Backing
TRA-2
Circuit Board Backing
See Note 1b
TRA-FS
MSK-FS
Detail A
Notes:
Units = mm.
1. Material:
1a. Circuit board: FR4, 0.254 mm thick, 1 oz finished copper TRA-NS layer,
1/2 oz finished copper TRA-2 layer.
1b. Circuit board backing: FR4 prepreg, 1 oz copper one side.
1c. Laminate the unmetalized side of backing to bottom of circuit board for a total
thickness of 1.5747 ± 0.127 mm. (See Detail A)
2. Plating: 200 microinches of nickel, and 50–100 microinches of soft gold.
3. Via plating: Cu plate 0.001 to 0.0015 thru both boards.
4. RF lines marked with * to be finished width of 0.50 mm measured at bottom of trace
(trace to board interface).
All line width tolerances ± 0.025 mm.
All rubout tolerances ± 0.025 mm.
5. Silk-screen reference designators approximately as shown.
6. Separate boards with router.
Package Footprint
16X 1.10
12X 0.50 Pitch
0.25
4X Plated
Thru Via
See Detail A
Metal GND Pad (Sq.) 1.45
0.23
Recommended Solder Reflow Profiles
Refer to the “Recommended Solder Reflow Profile”
Application Note.
Exposed
Solder Area
0.60
Tape and Reel Information
Refer to the “Discrete Devices and IC Switch/Attenuators
Tape and Reel Package Orientation” Application Note.
Detail A
Units = mm
14
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
November 19, 2008 • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • 200122 Rev. H
Data Sheet • SKY65006-348LF
Ordering Information
Model Name
SKY65006-348LF: 2.4–2.5 GHz WLAN/Zigbee Power Amplifier
®
Manufacturing Part Number
Evaluation Kit Part Number
SKY65006-348LF (Pb-free package)
TW17-D620-001
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Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200122 Rev. H • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • November 19, 2008
15