RF2312
0
LINEAR GENERAL PURPOSE AMPLIFIER
RoHS Compliant & Pb-Free Product
Typical Applications
• CATV Distribution Amplifiers
• Laser Diode Driver
• Cable Modems
• Return Channel Amplifier
• Broadband Gain Blocks
• Base Stations
Product Description
The RF2312 is a general purpose, low cost high linearity
RF amplifier IC. The device is manufactured on an
advanced Gallium Arsenide Heterojunction Bipolar Transistor (HBT) process, and has been designed for use as
an easily cascadable 75Ω gain block. The gain flatness of
better than 0.5dB from 5MHz to 1000MHz, and the high
linearity, make this part ideal for cable TV applications.
Other applications include IF and RF amplification in
wireless voice and data communication products operating in frequency bands up to 2500MHz. The device is
self-contained with 75Ω input and output impedances,
and requires only two external DC biasing elements to
operate as specified.
-A0.160
0.152
0.200
0.192
9
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
InGaP/HBT
GaN HEMT
SiGe Bi-CMOS
0.010
0.004
0.050
0.248
0.232
8° MAX
0° MIN
0.059
0.057
0.0100
0.0076
0.0500
0.0164
NOTES:
1. Shaded lead is pin 1.
2. All dimensions are excluding flash, protrusions or burrs.
3. Lead coplanarity: 0.005 with respect to datum "A".
4. Package surface finish: Matte (Charmilles #24~27).
Optimum Technology Matching® Applied
Si BJT
0.018
0.014
Package Style: SOIC-8
Features
• DC to well over 2500MHz Operation
• Internally Matched Input and Output
• 15dB Small Signal Gain
• 3.8dB Noise Figure
RF IN 1
8
RF OUT
GND 2
7
GND
GND 3
6
GND
GND 4
5
GND
• +20dBm Output Power
• Single 5V to 12V Positive Power Supply
Ordering Information
RF2312
RF2312 PCBA
RF2312 PCBA
Functional Block Diagram
Rev C6 051025
Linear General Purpose Amplifier
Fully Assembled Evaluation Board - 75Ω
Fully Assembled Evaluation Board - 50Ω
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
3-1
RF2312
Absolute Maximum Ratings
Parameter
Input RF Power
Output Load VSWR
Ambient Operating Temperature
Storage Temperature
Parameter
Rating
Unit
+18
20:1
-40 to +85
-40 to +150
dBm
°C
°C
Specification
Min.
Typ.
Max.
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. RoHS marking based on EUDirective2002/95/EC
(at 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).
Unit
Overall (50Ω)
Frequency Range
Gain
Noise Figure
14.5
Input VSWR
Output VSWR
4.3
4.8
2:1
1.4:1
2:1
MHz
dB
dB
dB
+42
+36
+33
+22
+21
+18.5
+23
+22.5
+20.5
20
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dB
ThetaJC
114.9
°C/W
Mean Time To Failure
ThetaJC
2170
114.05
years
°C/W
Mean Time To Failure
2170
years
5.5
5.0
100
V
V
mA
Output IP3
Output IP3
Output IP3
Output P1dB
Output P1dB
Output P1dB
Saturated Output Power
Saturated Output Power
Saturated Output Power
Reverse Isolation
+40
+33
+30
+21
+20
+17
DC to 2500
15.1
3.8
4.2
1.7:1
Condition
T=25°C, VCC =9V, Freq = 900 MHz,
RC =30Ω, 50Ω System, PIN =-4dBm
3dB Bandwidth
From 50MHz to 300MHz, -30 to +70 °C
From 300MHz to 1000MHz, -30 to +70 °C
Appropriate values for the DC blocking
capacitors and bias inductor are required to
maintain this VSWR at the intended operating frequency range.
Appropriate values for the DC blocking
capacitors and bias inductor are required to
maintain this VSWR at the intended operating frequency range.
At 100MHz
At 500MHz
At 900MHz
At 100MHz
At 500MHz
At 900MHz
At 100MHz
At 500MHz
At 900MHz
Thermal
ICC =100mA, PDISS =0.555W, TAMB =85°C,
TJ =149°C
No RF Input/Output
TAMB =+85°C
ICC =120mA, PDISS =0.702W, TAMB =85°C,
TJ =165°C
No RF Input/Output
TAMB =+85°C
Power Supply
Device Voltage (VD)
Operating Current Range
3-2
40
120
On pin 8, ICC =100mA
On pin 8, ICC =40mA
VCC =9.0V, RC =30Ω
Rev C6 051025
RF2312
Parameter
Specification
Min.
Typ.
Max.
Unit
Overall (75Ω)
Frequency Range
Gain
Noise Figure
DC to 2500
16
3.8
4.2
1.3:1
4.3
4.8
2:1
Output VSWR
1.2:1
1.75:1
2:1
2:1
Output IP3
Output IP3
Output IP3
Output P1dB
Output P1dB
Output P1dB
Saturated Output Power
Saturated Output Power
Saturated Output Power
Reverse Isolation
1.4:1
1.5:1
+38
+36
+30
+22
+21
+18.5
+23
+22.5
+20.5
20
14.5
Input VSWR
+36
+33
+28
+21
+20
+17
MHz
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dB
77 Channels
CSO
65
>86
>86
76
72
64
>86
>86
86
84
83
66
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dB
65
>86
>86
76
70
64
84
86
85
81
80
77
74
66
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dB
CTB
CNR
110 Channels
CSO
CTB
Cross Modulation
CNR
Rev C6 051025
Condition
T=25°C, VCC =9V, Freq = 900 MHz,
RC =30Ω, 75Ω System
3dB Bandwidth
From 50MHz to 300MHz, -30°C to +70°C.
From 300MHz to 1000MHz, -30°C to +70°C.
From 50MHz to 900MHz, -30°C to +70°C.
Appropriate values for the DC blocking
capacitors and bias inductor are required to
maintain this VSWR at the intended operating frequency range.
From 50MHz to 300MHz, -30°C to +70°C.
Appropriate values for the DC blocking
capacitors and bias inductor are required to
maintain this VSWR at the intended operating frequency range.
From 300MHz to 500MHz, -30°C to +70°C.
From 500MHz to 900MHz, -30°C to +70°C.
At 100MHz
At 500MHz
At 900MHz
At 100MHz
At 500MHz
At 900MHz
At 100MHz
At 500MHz
At 900MHz
77 Channels to 550MHz at 10dBmV,
33 channels to 760MHz at 0dBmV flat at
DUT input
61.25MHz
83.25MHz
193.25MHz
313.2625MHz
547.25MHz
61.25MHz
83.25MHz
193.25MHz
313.2625MHz
547.25MHz
110 Channels, 10dBmV/channel at input
61.25MHz
83.25MHz
193.25MHz
313.2625MHz
547.25MHz
61.25MHz
83.25MHz
193.25MHz
313.2625MHz
547.25MHz
61.25MHz
445.25MHz
3-3
RF2312
Parameter
Specification
Min.
Typ.
Max.
Unit
T=25°C, VCC =9V or 24V, 75Ω System,
RFIN =-10dBm
Overall (75Ω Push-Pull)
Frequency Range
Gain
Noise Figure
Input VSWR
Output VSWR
Output IP2
Output IP3
Second Harmonic
3-4
Condition
DC to 150
15
5.0
1.1:1
1.2:1
+71
+72
+74
+40
+40
+40
-73
-65
-65
MHz
dB
dB
From 5MHz to 150MHz, -30°C to +70°C.
dBm
dBm
dBm
dBm
dBm
dBm
dBc
dBc
dBc
At 10MHz
At 30MHz
At 50MHz
At 10MHz
At 30MHz
At 50MHz
At 10MHz
At 30MHz
At 50MHz
Rev C6 051025
RF2312
Pin
1
Function
RF IN
2
GND
3
4
5
6
7
8
GND
GND
GND
GND
GND
RF OUT
Rev C6 051025
Description
Interface Schematic
RF input pin. This pin is NOT internally DC-blocked. A DC-blocking
capacitor, suitable for the frequency of operation, should be used in all
applications. The device has internal feedback, and not using a DCblocking capacitor will disable the temperature compensation.The bias
of the device can be controlled by this pin. Adding an optional 1kΩ
resistor to ground on this pin reduces the bias level, which may be compensated for by a higher supply voltage to maintain the appropriate
bias level. The net effect of this is an increased output power capability,
as well as higher linearity for signals with high crest factors. DC-coupling of the input is not allowed, because this will override the internal
feedback loop and cause temperature instability.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane. Each ground pin should
have a via to the ground plane.
Same as pin 2.
Same as pin 2.
Same as pin 2.
Same as pin 2.
Same as pin 2.
RF output and bias pin. Because DC is present on this pin, a DC-blocking capacitor, suitable for the frequency of operation, should be used in
most applications. For biasing, an RF choke in series with a resistor is
needed. The value for the resistor RC is 30Ω (0.5W) for VCC =9V and
21Ω for VCC =8V. The DC voltage on this pin is typically 6.0V with a
current of 100mA. In lower power applications the value of RC can be
increased to lower the current and VD on this pin.
RF OUT
RF IN
3-5
RF2312
Application Schematic
5MHz to 50MHz Reverse Path
VCC
30 Ω
10 nF
RF IN
RS
1 - 2 kΩ
100 nF
100 nF
10 μH
1
RF OUT
8
10 nF
2
7
3
6
4
5
NOTE 1:
Optional resistor RS can be used to maintain the correct bias level at higher supply voltages. This is used to
increase output capability or linearity for signals with high crest factors.
Application Schematic
10dB Gain
VCC= 9 - 12 V
C3
10 nF
C1
220 pF
R5
1 - 2 kΩ
RF IN
L1
330 nH
1
C4
TBD
R1 = 21 - 30 Ω
R2
470 Ω
R6
7.5 Ω
RF OUT
8
2
7
3
6
4
5
C2
220 pF
R7
7.5 Ω
C5
TBD
R5 is used to maintain the correct bias level at higher supply voltages and is also required in this configuration. The RC network of R2
and C3 should be kept physically as short as possible. R2 can be adjusted as required to improve the impedance matching. R6 and
R7 reduce the typical gain by increasing the emitter resistance. L1 should be at least 200 Ω reactive at the lowest operating
frequency. C1 and C2 should be less than 10 Ω at the lowest operating frequency. C4 and C5 improve gain flatness.
3-6
Rev C6 051025
RF2312
Application Schematic
Push-Pull Standard Voltage
P1
1
GND
2
3
CON3
120 Ω
120 Ω
120 Ω
120 Ω
0.1 uF
V
U1
F EDGE
616PT1030
1
8
2
7
3
6
4
5
RF2312
616PT1030
U2
V
1
8
2
7
3
6
4
F EDGE
5
RF2312
Rev C6 051025
3-7
RF2312
Application Schematic
Push-Pull 24V
P1
1
GND
2
3
CON3
120 Ω
F EDGE
120 Ω
U1
2400 Ω
616PT1030
120 Ω
10 nF
120 Ω
0.1 uF
10 uH
1
8
2
7
3
6
4
5
10 nF
616PT1030
F EDGE
0.1 uF
RF2312
10 nF
47 nF
2400 Ω
63 nF
10 uH
120 Ω
120 Ω
120 Ω
120 Ω
U2
10 nF
1
8
2
7
3
6
4
5
RF2312
3-8
Rev C6 051025
RF2312
Evaluation Board Schematic - 50Ω
(Download Bill of Materials from www.rfmd.com.)
P1 H3M
P1-1
1
VCC (9 V)
2
GND
3
NC
micro
strip
J1
SMA
P1-1
R1
120Ω
R2
120Ω
R3
120Ω
R4
120Ω
C2
100 nF
C4
100 nF
L1
330 nH
C1
220 pF
1
OUT
8
2
7
3
6
4
5
C3
220 pF
micro
strip
J2
SMA
2312400A
Evaluation Board Schematic - 75Ω
P1-1
P1
P1-1
1
VCC
2
GND
3
NC
C3
0.1 uF
R4
120Ω
R1
120Ω
R2
120Ω
R3
120Ω
CON3
J1
F CONN
(75Ω)
micro
strip
L1
1000 nH
C1
1 nF
1
8
2
7
3
6
4
5
C3
1 nF
OUT
micro
strip
J2
F CONN
(75Ω)
2312401-
NOTE: For 5V applications, R1 to R4 may be removed (shorted). This will result in degraded distortion performance.
Rev C6 051025
3-9
RF2312
Evaluation Board Layout - 50Ω
2.02” x 2.02”
Board Thickness 0.031”, Board Material FR-4
3-10
Rev C6 051025
RF2312
Evaluation Board Layout - 75Ω
Standard Voltage
1.40” x 1.40”
Board Thickness 0.062”, Board Material FR-4
Rev C6 051025
3-11
RF2312
Evaluation Board Layout - 75Ω
Push-Pull, Standard Voltage
1.70” x 1.50”
Board Thickness 0.062”, Board Material FR-4
3-12
Rev C6 051025
RF2312
Evaluation Board Layout - 75Ω
Push-Pull, 24V
1.70” x 1.50”
Board Thickness 0.062”, Board Material FR-4
Rev C6 051025
3-13
RF2312
POUT versus PIN
500 MHz
20.0
ICC versus Device Voltage
(Pin 8)
140.0
Rs=1k
No Rs
120.0
15.0
ICC (mA)
POUT (dBm)
100.0
10.0
80.0
60.0
40.0
5.0
20.0
0.0
0.0
-15.0
-10.0
-5.0
0.0
4.0
5.0
4.5
5.0
50.0
6.0
6.5
7.0
7.5
8.0
Output P1dB versus Frequency
Output Third Order Intercept Point (OIP3) versus PIN
500 MHz
25.0
Vcc=5.0V, Rc=22
Vcc=6.0V, Rc=22
Vcc=7.0V, Rc=22
Vcc=8.0V, Rc=22
Vcc=9.0V, Rc=30
Vcc=11.0V, Rc=30, Rs=1k
20.0
Output P1dB (dBm)
40.0
Output IP3 (dBm)
5.5
Device Voltage (V)
PIN (dBm)
30.0
20.0
10.0
15.0
10.0
5.0
0.0
0.0
-15.0
-10.0
-5.0
0.0
5.0
0.0
500.0
1000.0
1500.0
2000.0
2500.0
Frequency (MHz)
PIN (dBm)
IM3 Products versus POUT
500/501 MHz
70.0
60.0
IM3 Products (-dBc)
50.0
40.0
30.0
20.0
10.0
0.0
5.0
10.0
15.0
20.0
25.0
POUT (dBc)
3-14
Rev C6 051025
RF2312
CH1
S 11
1 U FS
4_: 53.809
-24.182
3.464 pF
CH1
S 21
log MAG
10 dB/
REF 0 dB
4_: 14.454 dB
1 900.000 000 MHz
1 900.000 000 MHz
1_: 97.188
-1.5742
50 MHz
C2
1_: 15.372 dB
50 MHz
C2
2_: 93.512
-13.215
450 MHz
2_: 15.307 dB
450 MHz
3_: 15.184 dB
900 MHz
3_: 84.16
-22.945
900 MHz
4
1
2
3
1
2
4
3
START
.300 000 MHz
STOP 3 000.000 000 MHz
START
CH1
S 22
1 U FS
4_: 19.802
-16.739
5.0042 pF
CH1
.300 000 MHz
S 12
STOP 3 000.000 000 MHz
log MAG
10 dB/
REF 0 dB
4_:-17.966 dB
1 900.000 000 MHz
1 900.000 000 MHz
1_: 115.2
-6.6211
50 MHz
C2
1_:-19.908 dB
50 MHz
C2
2_: 87.551
-42.652
450 MHz
2_:-19.87 dB
450 MHz
3_: 52.43
-44.855
900 MHz
3_:-19.554 dB
900 MHz
1
4
2
4
3
1
START
.300 000 MHz
3
STOP 3 000.000 000 MHz
START
Rev C6 051025
2
.300 000 MHz
STOP 3 000.000 000 MHz
3-15
RF2312
0.8
2.
0
2.
0
6
0.
Swp Max
2.001GHz
0.
4
0.
4
3.
1.0
75 Ohms, ICC = 110 mA, Temp = 25°C
Swp Max
2.001GHz
6
0.
0.8
1.0
75 Ohms, ICC = 100 mA, Temp = 25°C
0
0
3.
0
4.
0
4.
5.0
5.0
0.2
0.2
-10.0
-1.0
10.0
5.0
4.0
3.0
2.0
1.0
0.8
.0
-2
-0
.6
Swp Min
0.001GHz
-1.0
0
.0
-2
-3
.
-0.8
.4
-0
-0.8
-4
.0
-5.
0
.4
-0
S[1,1]
2
-0.
-4
.0
-5.
0
S[1,1]
-0
.6
0.6
S[2,2]
2
-0.
3-16
0.4
0.2
0
10.0
5.0
4.0
3.0
2.0
1.0
0.8
0.6
0.4
S[2,2]
-3
.0
0
10.0
-10.0
0.2
10.0
Swp Min
0.001GHz
Rev C6 051025