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RF2324
4
Typical Applications
* TDMA/CDMA/FM PCS Tx Amplifier * Low Noise Transmit Driver Amplifier * 2.4GHz WLAN Systems * ISM Band LNA/Driver * General Purpose Amplification * Commercial and Consumer Systems
PCS CDMA/TDMA 3V PA DRIVER AMPLIFIER
Product Description
The RF2324 is a low noise CDMA/TDMA PA driver amplifier with a very high dynamic range designed for transmit digital PCS applications at 1880MHz. The device functions as an outstanding PA driver amplifier in the transmit chain of digital subscriber units where low transmit noise power is a concern. The IC includes a power down feature that can be used to completely turn off the device. The IC is featured in a standard miniature 8-lead plastic MSOP package.
0.192 + 0.008 0.012 0.006 + 0.003 -A-
4
GENERAL PURPOSE AMPLIFIERS
0.0256
0.118 + 0.004 sq. 6 MAX 0 MIN
0.034
NOTES: 1. Shaded lead is pin 1. 2. All dimensions are exclusive of flash, protrusions or burrs. 3. Lead coplanarity: 0.002 with respect to datum "A".
0.021 + 0.004
0.006 + 0.002
Optimum Technology Matching(R) Applied
Si BJT Si Bi-CMOS
u
Package Style: MSOP-8
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features
* Low Noise and High Intercept Point * Power Down Control * Single 2.5V to 6.0V Power Supply
PD NC RF IN GND1
1 2 3 4
8 7 6 5
GND2 RF OUT GND2 GND2
* 150MHz to 2500MHz Operation * Extremely Small MSOP-8 Package
Ordering Information
RF2324 RF2324 PCBA PCS CDMA/TDMA 3V PA Driver Amplifier Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev A6 010717
4-115
RF2324
Absolute Maximum Ratings Parameter
Supply Voltage Input RF Level Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +8.0 +10 -40 to +85 -40 to +150
Unit
VDC dBm C C
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s).
Parameter
Overall
Specification Min. Typ. Max.
150 to 2500
Unit
MHz
Condition
4
GENERAL PURPOSE AMPLIFIERS
RF Frequency Range
1880MHz Performance
Gain 21 21 21 +26 22 22 22 +28 +26 +25 1.8 1.8 1.8 36 36 35 1.3:1 1.25:1 16 14.5 13 2.5 to 6.0 2.8 33 23 23 23 +35 dB dB dB dBm dBm dBm dB dB dB dB dB dB
Output IP3
Noise Figure
2.5 2.5 2.5
Reverse Isolation
Schematic per Evaluation Board, T = 25C, RF=1880MHz, VPD =2.8V VCC =3.5V VCC =3.0V VCC =2.5V VCC =3.5V VCC =3.0V VCC =2.5V VCC =3.5V VCC =3.0V VCC =2.5V VCC =3.5V VCC =3.0V VCC =2.5V Using External LC network used on Evaluation Board VCC =3.5V VCC =3.0V VCC =2.5V T = 25 C
Input VSWR Output VSWR P1dB 14 12.5 11
2.0:1 2.0:1 dBm dBm dBm V V mA
Power Supply
Voltage (VCC) Voltage (VPD) Current Consumption 2.7 24 2.9 43
24 29 - Power Down
31 36
38 43 10
mA mA
VCC =3.5V; VPD =2.8 V; VPD + VCC - Current Consumption from VPD is 8.5 mA Typ. @ VPD = 2.8V and 12 mA Max @ VPD =2.9 V VCC =3.0V; VPD =2.7V; VPD + VCC VCC =2.5V; VPD =2.9V; VPD + VCC VCC =3.5V; VPD 0.9V
4-116
Rev A6 010717
RF2324
Pin 1 Function PD Description
Power down for the IC. VPD = 2.8V +/- 0.1V turns on the part. VPD <0.9V turns off the Part. External RF bypassing is required. The trace length between the pin and the bypass capacitors should be minimized. The ground side of the bypass capacitors should connect immediately to ground plane. Nominal current required for VPD = 2.8V is 8.5 mA typical and 12 mA Max (@ VPD =2.9 V). No connection. This pin is typically left unconnected or grounded. RF input pin. This pin is DC-coupled and matched to 50 at 1880MHz.
PD
Interface Schematic
PD
2 3
NC RF IN
TO OUTPUT STAGE RF IN
4
GENERAL PURPOSE AMPLIFIERS
4 5 6 7
GND1 GND2 GND2 RF OUT
Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. See pin 6. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. Amplifier Output pin. This pin is an open-collector output. It must be biased to either VCC or pin 7 through a choke or matching inductor. This pin is typically matched to 50 with a shunt bias/matching inductor and series blocking/matching capacitor. Refer to application schematics. See pin 6.
8
GND2
Rev A6 010717
4-117
RF2324
Application Schematic: ~1880 MHz Operation, Internal Collector Bias
V P D (2.8 V +/-0.1V ) 10 nF VCC
10 nF
220 pF 1 8 7
220 pF 4.7 nH VO UT 1.0 pF
4
GENERAL PURPOSE AMPLIFIERS
R F IN
NC 10 pF
2 3 4
6 5
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
P1 P1-1 1 2 P1-3 C7 4.7 F 3 VPD GND VCC
R1 0 PD
C2 10 nF
C1 220 pF 1 C3 10 pF 2 3 4 8 7 6 5
C5 220 pF L1 4.7 nH C4 1 pF
C6 10 nF VCC 50 strip
J2 RF OUT
J1 RF IN
50 strip
2324400A
4-118
Rev A6 010717
RF2324
Evaluation Board Layout Board Size 1" x 1"
Board Thickness 0.031"; Board Material FR-4; Multi-Layer
4
GENERAL PURPOSE AMPLIFIERS
Rev A6 010717
4-119
RF2324
RF2324 Bias Current versus Rc
45 40 35 30 21.0 25 20 15 10 5 0 0 100 200 300 400 500 600 19.5 Vcc = 2.7 V Vcc = 3.0 V Vcc = 3.3 V Vcc = 3.6 V 22.5 Vcc = 2.7 V Vcc = 3.0 V Vcc = 3.3 V Vcc = 3.6 V
RF2324 Gain versus Bias Current
22.0
21.5
Bias Current (mA)
Gain (dB)
20.5
20.0
4
GENERAL PURPOSE AMPLIFIERS
19.0
18.5 0 5 10 15 20 25 30 35 40 45
Rs ()
Bias Current (mA)
RF2324 Noise Figure versus Bias Current
1.8 Vcc = 2.7 V Vcc = 3.0 V Vcc = 3.3 V Vcc = 3.6 V 31
RF2324 OIP3 versus Bias Current
Vcc = 2.7 V Vcc = 3.0 V Vcc = 3.3 V Vcc = 3.6 V
29
1.7
27
Noise Figure (dB)
1.6 25
OIP3 (dBm)
1.5
23
21 1.4 19 1.3 17
1.2 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0
15 0 5 10 15 20 25 30 35 40 45
Bias Current (mA)
Bias Current (mA)
RF2324 IIP3 versus Bias Current
8 7 6 5 4 Vcc = 2.7 V Vcc = 3.0 V Vcc = 3.3 V Vcc = 3.6 V
IIP3 (dBm)
3 2 1 0 -1 -2 -3 0 5 10 15 20 25 30 35 40 45
Bias Current (mA)
4-120
Rev A6 010717

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