INTERSIL ISL3984IR

Data Sheet
P RE L I M I NA R Y
December 2000
File Number
4862.4
2.4GHz Power Amplifier and Detector
Features
The ISL3984 is a 2.4GHz monolithic
SiGe Power Amplifier designed to
operate in the ISM Band. It features
two low voltage single supply stages.
Cascaded, they deliver 18dBm (Typ) output power for the
typical DSSS signal (ACPR, 1st Side Lobe < -30dBc, 2nd
Side Lobe < -50dBc).
• Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 3.6V
In addition, the device includes a 2.4GHz detector which is
accurate over a 15dB dynamic range within (±)1dB.
Therefore, an accurate ALC function can be implemented.
Applications
• Output Power . . . . . . . . . . . 18dBm (Typ) at ACPR, DSSS,
1st Side Lobe < -30dBc, 2nd Side Lobe < -50dBc
• Power Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30dB (Typ)
• Detector Linear Input Power Range . . . . . . . . . . . . . .15dB
• Detector Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±1dB
• IEEE802.11 1, 2 or 5.5Mbps Standard
• Systems Targeting IEEE802.11b, 11Mbps Standard
The ISL3984 is housed in a 16 lead MLFP package well
suited for PCMCIA board applications.
• Wireless Local Area Networks (WLAN)
Ordering Information
• ISM Systems Including Automatic Level Control (ALC)
• PCMCIA Wireless Transceivers
• TDMA Packet Protocol Radios
16 Ld MLFP
ISL3984IR96
-40 to 85
Tape and Reel
ISL3984 (MLFP)
TOP VIEW
L16.4x4
GND
-40 to 85
Pinouts
GND
ISL3984IR
PKG. NO.
12 11 10
9
GND
PACKAGE
Simplified Block Diagram
RF_IN
PART NUMBER
TEMP
RANGE (oC)
DS_VCC
DET_OUT 13
RF_IN
RF_OUT
VCC_DET 14
PE 15
8 GND
PACKAGE PINOUT
SUBJECT TO CHANGE
7 GND
6 RF_OUT
PEAK DETECTOR
BIAS_GND 16
BIAS
1
2
3
4
GND
DET_OUT
1
DS_VCC
REXT
LOG
REXT
PE
5 GND
BIAS_VCC
[ /Title
(ISL39
84)
/Subject
(2.4G
Hz
Power
Amplifier
and
Detector)
/Autho
r ()
/Keywords
(Intersil
Corporation,
semiconductor,
Wireless
Communications
, RF,
Radio
Frequency
, IF,
Intermediate
Fre-
ISL3984
TM
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
PRISM® is a registered trademark of Intersil Corporation. PRISM and design is a trademark of Intersil Corporation.
ISL3984
Pin Descriptions
PIN NUMBER
1
NAME
DESCRIPTION
BIAS_VCC Power Supply.
2
REXT
3
DS_VCC
4, 5
GND
6
RF_OUT
7, 8, 9, 10
GND
11
RF_IN
12
GND
13
DET_OUT
Detector Output.
14
VCC_DET
Detector Power Supply.
15
PE
16
Bias Resistor, biasing scheme
independent of absolute
temperature.
Driver Stage Power Supply.
DC and RF Ground.
RF Output of the Power Amplifier.
DC and RF Ground.
RF Input of the Power Amplifier.
DC and RF Ground.
Digital Input Control Pin to enable
operation of the Power Amplifier.
Enable logic level is high.
BIAS_GND DC and RF Ground.
The ISL3984 works seamlessly with the PRISM II and
PRISM II.V WLAN chip set components to give you a highly
integrated, cost effective 11Mb/s WLAN solution in the 2.4 to
2.5GHz ISM band. The ISL3984 is fabricated in the fastest
SiGe BiCMOS process available allowing superior RF
performance, normally found only in GaAs ICs. Cost effective
functions, normally requiring external components, are
integrated into one IC. The ISL3984 integrates the following
functions in one compact 16 pin MLFP:
• Two Stage, 30dB Gain RFPA,
• Logarithmic power detect function (15dB Dynamic
Range),
• CMOS level compatible Power Up/Down function,
• Single Supply, 2.7V to 3.6V Operation.
2
The ISL3984 contains a highly linear RFPA designed to deliver
18dBm and meet an ACPR specification of -30dBc in the 2.4 to
2.5GHz ISM band. The performance of this two stage RFPA
can be optimized by adjusting the bias current with a dedicated
resistor. No external positive or negative power supplies are
required to set the bias currents. The on chip bias network
provides the optimum bias current temperature compensation
when low TC external resistor is used. To get the best
performance from the ISL3984, the output stage matching
network can be tailored using external components.
The ISL3984 power detect function provides a DC output
voltage that is proportional to the logarithm of the output
power. For an output power of 18dBm, the detector is
accurate to within a 0.5dB. The slope of the detector output
voltage is 100mV/dB over a 15dB dynamic range. A simple
application of the detector is to provide in-line monitoring of
the output power using a DC voltmeter. No longer is a power
meter or spectrum analyzer required. A more value added
application would use the HFA3861B/HFA3863 Baseband
Processor to dynamically monitor the ISL3984 output power
and to control transmit power by adjusting the AGC of the
HFA3783 IF Quadrature Modem to provide the best possible
error free data transfer rate for any given environment.
Closed loop power control is very important feature which
compensates for variability in the transmit chain (radio to
radio, channel to channel, over temperature...).
The ISL3984 power up/down feature integrates the power
down capability onto the IC and requires no external
components thus freeing up board space and reducing
external component count and cost. When the CMOS
compatible Power Enable (PE) pin is driven low, the total
supply current drops to under 50µA in, typically, 300ns.
When the PE pin is driven high, the full ISL3984 output
power is available in a few hundred nanoseconds.
In summary, the ISL3984 RFPA provides a highly cost
effective solution for the PA function by integrating many
features that would require significant development time,
drive up the total bill of materials cost and consume precious
board space. It mates seamlessly with the other PRISM II
ICs to provide a highly integrated, cost effective 11Mb/s
WLAN solution in the 2.4 to 2.5GHz ISM band.
ISL3984
Absolute Maximum Ratings
Thermal Information
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4V
Voltage on Any Other Pin. . . . . . . . . . . . . . . . . . . -0.3 to VCC +0.3V
VCC to VCC Decouple . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V
Any GND to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V
Thermal Resistance (Typical, Note 1)
θJA (oC/W)
MLFP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC
Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 85oC
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 3.6V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Intersil TB379.
General DC Electrical Specifications
TEMP. (oC)
MIN
Supply Voltage
Full
Total Power Amplifier Supply Current at 3.3V, 18dBm Output
25
PARAMETER
TYP
MAX
UNITS
2.7
-
3.6
V
-
137
-
mA
RF Detector Supply Current
25
-
-
2
mA
Power Down Supply Current
Full
-
200
-
µA
Power Up/ Down Speed
Full
-
300
-
ns
CMOS Low Level Input Voltage
Full
-
-
0.3*VDD
V
CMOS High Level Input Voltage (VDD = 3.6V)
Full
0.7*VDD
-
-
V
CMOS Threshold Voltage
Full
>0.3*VDD
0.5*VDD
<0.7*VDD
V
CMOS High or Low Level Input Current
Full
-10
-
+10
µA
Power Amplifier AC Electrical Specifications
VCC = 3.3V, f = 2.45GHz, Unless Otherwise Specified. Typical Application Circuit
(external input and output matching networks) has been used.
TEMP. (oC)
MIN
RF Frequency Range
Full
Power/Voltage Gain
Full
Input 50Ω VSWR
Output 50Ω VSWR
PARAMETER
TEST CONDITIONS
TYP
MAX
UNITS
2400
-
2500
MHz
27
30
35
dB
25
-
-
2:1
-
25
-
-
3:1
-
Full
-
18
-
dBm
Output Power
ACPR, DSSS, 1st Side Lobe <30dBc, 2nd Side Lobe <-50dBc
Output Stability VSWR
Output Spurs Less than -60dBc
Full
-
-
10:1
-
Output Load Mismatch
(Note 2)
Full
-
-
10:1
-
NOTE:
2. Devices sustain no damage when subjected to a mismatch of maximum 10:1.
Peak Detector AC Electrical Specifications
TEST CONDITIONS
TEMP.
(oC)
MIN
TYP
MAX
UNITS
RF Output Detector Response Time
External Capacitor, C = 5pF
Full
-
0.15
-
µs
RF Output Detector Voltage Range
Load > 1M
Full
0
-
1.5
V
RF Output Detector Linearity
Over Linear Range
Full
-0.5
-
0.5
dB/V
RF Output Detector Accuracy
600mVDC Output
Full
-1
-
+1
dB
RF Output Detector Slope
Over Linear Range
Full
-
10
-
dB/V
PARAMETER
3
ISL3984
Typical Application Example
ISL3984 - 16 PIN MLFP PACKAGE
L2
BLM31P500S
RFIN (50Ω)
VCC
C10
P1
C1
4.7µF
C3
0.1µF
2.7pF
3.3V
P2
D1
12 11 10
DL4001
C11
270pF
DETOUT
C9
1000pF
VCC
9
R4
1kΩ
R3
13
8
14
7
15
6
16
5
10Ω
VCC
1
4
L1
BLM10A1215
L3
1.5nH
C4
1000pF
3
2
4.64kΩ
R2
100kΩ
R1
C6
1000pF
PE
V CC
C2
1000pF
L5
2.2nH
L4
BLM10A1215
RFOUT (50Ω)
C5
1000pF
C7
10pF
C8
1.8pF
Typical Performance Curves
-5
INPUT RETURN LOSS (dB)
INPUT RETURN LOSS (dB)
-5
-17
-20
2.7V
-29
2.0
3.6V
2.4
2.5
-17
-40oC
-20
25oC
-29
85oC
3.0
2.0
2.4
2.5
3.0
FREQUENCY (GHz)
FREQUENCY (GHz)
FIGURE 1. INPUT RETURN LOSS OVER VOLTAGE
FIGURE 2. INPUT RETURN LOSS OVER TEMPERATURE
4
ISL3984
(Continued)
OUTPUT RETURN LOSS (dB)
OUTPUT RETURN LOSS (dB)
Typical Performance Curves
-4
2.7V
-9
-10
-4
-40oC
-9
25oC
-10
85oC
3.6V
2.0
2.4
2.5
2.0
3.0
2.4
2.5
3.0
FREQUENCY (GHz)
FREQUENCY (GHz)
FIGURE 3. OUTPUT RETURN LOSS OVER VOLTAGE
FIGURE 4. OUTPUT RETURN LOSS OVER TEMPERATURE
32
32
28
LINEAR GAIN (dB)
30
28
2.4
2.5
25oC
85oC
3.0
2.0
2.4
2.5
3.0
FREQUENCY (GHz)
FREQUENCY (GHz)
FIGURE 5. LINEAR GAIN OVER VOLTAGE
FIGURE 6. LINEAR GAIN OVER TEMPERATURE
0
1
3.6V
2
2.7V
3.6V
2.7V
-25
-11
2dB/DIV.
OUTPUT POWER (dBm) COMPRESSION (dBm)
2.0
-40oC
-5
INPUT POWER (dBm)
FIGURE 7. GAIN COMPRESSION OVER VOLTAGE
5
0
85oC
1
2
25oC
-40oC
85oC
25oC
-25
-11
-40oC
2dB/DIV.
2.7V
OUTPUT POWER (dBm) COMPRESSION (dBm)
LINEAR GAIN (dB)
3.6V
30
-5
INPUT POWER (dBm)
FIGURE 8. GAIN COMPRESSION OVER TEMPERATURE
ISL3984
Typical Performance Curves
(Continued)
-40C
10dB/DIV.
10dB/DIV.
2.7V
3V
3.3V
3.6V
25C
85C
CENTER FREQUENCY 2450MHz
SPAN 50MHz
CENTER FREQUENCY 2450MHz
INPUT POWER -2dBm
SPAN 50MHz
FIGURE 9. DSSS OUTPUT SIGNAL OVER VOLTAGE
INPUT POWER -2dBm
FIGURE 10. DSSS OUTPUT SIGNAL OVER TEMPERATURE
0.9
0.9
0.8
0.8
DETECTOR OUTPUT (V)
DETECTOR OUTPUT (V)
0.7
0.6
0.5
0.4
0.3
2.7V
0.2
3.6V
0.1
14
85oC
0.6
25oC
0.5
0.4
-40oC
0.3
0.2
0
13
0.7
15
16
17
18
19
20
OUTPUT POWER (dBm)
FIGURE 11. DETECTOR OUTPUT OVER VOLTAGE
6
0.1
13
14
15
16
17
18
19
20
OUTPUT POWER (dBm)
FIGURE 12. DETECTOR OUTPUT OVER TEMPERATURE
ISL3984
Micro Lead Frame Plastic Package (MLFP)
L16.4x4
2X
0.25 C A
D
A
16 LEAD MICRO LEAD FRAME PLASTIC PACKAGE
(COMPLIANT TO JEDEC MO-220-VGGC ISSUE A)
D/2
INCHES
D1
SYMBOL
D1/2
2X
N
6
0.50 DIA.
0.25 C B
1
2
3
E1/2
E/2
E1
2X
B
0.20 C A
TOP VIEW
2X
0
A2
A
C
SEATING
PLANE
A3
SIDE VIEW
5
b
4X P
0.10 M C A B
7
D2
D2/2
0.039
-
1.00
0.002
-
0.05
A2
-
0.031
-
A3
0.008 REF
1
(Ne-1)Xe
REF.
E2
7
E2/2
L
e
(Nd-1)Xe
REF.
BOTTOM VIEW
C
L
5
C C
A1
C
L
b
0.009
0.014
0.147 BSC
D2
-
0.088
0.80
0.20 REF
0.23
0.157 BSC
D1
0.35
3.75 BSC
-
2.25
E
0.157 BSC
4.00 BSC
0.147 BSC
3.75 BSC
E2
-
-
0.026 BSC
0.019
0.029
5
4.00 BSC
E1
0.088
NOTES
2.25
7
7
0.65 BSC
0.50
0.75
N
16
16
2
Nd
4
4
3
Ne
4
4
3
P
0.009
0.024
0.24
0.60
θ
-
12
-
12
Rev. 2 8/00
NOTES:
1. Dimensioning and tolerancing per ASME Y14.5-1994.
2. N is the number of terminals.
3. Nd is the number of terminals in the X direction, and Ne is the
number of terminals in the Y direction.
4. Controlling dimension: Millimeters. Converted dimensions to
inches are not necessarily exact. Angles are in degrees.
5. Dimension b applies to the plated terminal and is measured
between 0.20mm and 0.25mm from the terminal tip.
6. The Pin #1 identifier exists on the top surface as an
indentation mark in the molded body.
7. Dimensions D2 and E2 are the maximum exposed pad
dimensions for improved grounding and thermal
performance.
N
4X P
2
3
MAX
-
L
A1
MIN
-
e
0.05 C
MILLIMETERS
A
D
0.20 C B
MAX
A1
b
E
MIN
SECTION "C-C"
e
e
TERMINAL TIP
FOR ODD TERMINAL/SIDE
FOR EVEN TERMINAL/SIDE
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Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice.
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