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RF2312
0
Typical Applications * CATV Distribution Amplifiers * Cable Modems * Broadband Gain Blocks 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 75 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 75 input and output impedances, and requires only two external DC biasing elements to operate as specified.
-A0.160 0.152 0.018 0.014 0.010 0.004
LINEAR GENERAL PURPOSE AMPLIFIER
RoHS Compliant & Pb-Free Product * Laser Diode Driver * Return Channel Amplifier * Base Stations
0.200 0.192
0.050
0.248 0.232 8 MAX 0 MIN 0.0500 0.0164
0.059 0.057
0.0100 0.0076
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(R) Applied
Si BJT Si Bi-CMOS InGaP/HBT GaAs HBT SiGe HBT GaN HEMT GaAs MESFET Si CMOS SiGe Bi-CMOS
Package Style: SOIC-8
Features * DC to well over 2500MHz Operation * Internally Matched Input and Output * 15dB Small Signal Gain * 3.8dB Noise Figure * +20dBm Output Power * Single 5V to 12V Positive Power Supply
RF IN 1 GND 2 GND 3 GND 4
8 7 6 5
RF OUT GND GND GND
Ordering Information
RF2312 RF2312 PCBA RF2312 PCBA Linear General Purpose Amplifier Fully Assembled Evaluation Board - 75 Fully Assembled Evaluation Board - 50 Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Functional Block Diagram
RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA
Rev C6 051025
3-1
RF2312
Absolute Maximum Ratings Parameter
Input RF Power Output Load VSWR Ambient Operating Temperature Storage Temperature
Rating
+18 20:1 -40 to +85 -40 to +150
Unit
dBm C C
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).
Parameter
Overall (50)
Frequency Range Gain Noise Figure Input VSWR
Specification Min. Typ. Max.
Unit
Condition
T=25C, VCC =9V, Freq = 900 MHz, RC =30, 50 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
14.5
DC to 2500 15.1 3.8 4.2 1.7:1
4.3 4.8 2:1
MHz dB dB dB
Output VSWR
1.4:1
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
+40 +33 +30 +21 +20 +17
+42 +36 +33 +22 +21 +18.5 +23 +22.5 +20.5 20 114.9
dBm dBm dBm dBm dBm dBm dBm dBm dBm dB C/W
Thermal
ThetaJC ICC =100mA, PDISS =0.555W, TAMB =85C, TJ =149C No RF Input/Output TAMB =+85C ICC =120mA, PDISS =0.702W, TAMB =85C, TJ =165C No RF Input/Output TAMB =+85C On pin 8, ICC =100mA On pin 8, ICC =40mA VCC =9.0V, RC =30
Mean Time To Failure ThetaJC
2170 114.05
years C/W
Mean Time To Failure
2170 5.5 5.0 100
years V V mA
Power Supply
Device Voltage (VD) Operating Current Range 40
120
3-2
Rev C6 051025
RF2312
Parameter
Overall (75)
Frequency Range Gain Noise Figure Input VSWR 14.5 DC to 2500 16 3.8 4.2 1.3:1 MHz dB dB dB
Specification Min. Typ. Max.
Unit
Condition
T=25C, VCC =9V, Freq = 900 MHz, RC =30, 75 System 3dB Bandwidth From 50MHz to 300MHz, -30C to +70C. From 300MHz to 1000MHz, -30C to +70C. From 50MHz to 900MHz, -30C to +70C. 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, -30C to +70C. 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, -30C to +70C. From 500MHz to 900MHz, -30C to +70C. 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
4.3 4.8 2:1
Output VSWR
1.2:1
1.75:1
Output IP3 Output IP3 Output IP3 Output P1dB Output P1dB Output P1dB Saturated Output Power Saturated Output Power Saturated Output Power Reverse Isolation
+36 +33 +28 +21 +20 +17
1.4:1 1.5:1 +38 +36 +30 +22 +21 +18.5 +23 +22.5 +20.5 20
2:1 2:1 dBm dBm dBm dBm dBm dBm dBm dBm dBm dB
77 Channels
CSO >86 >86 76 72 64 >86 >86 86 84 83 66 >86 >86 76 70 64 84 86 85 81 80 77 74 66 dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dB dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dB
CTB
CNR
65
110 Channels
CSO
CTB
Cross Modulation CNR 65
Rev C6 051025
3-3
RF2312
Parameter
Overall (75 Push-Pull)
Frequency Range Gain Noise Figure Input VSWR Output VSWR Output IP2 DC to 150 15 5.0 1.1:1 1.2:1 +71 +72 +74 +40 +40 +40 -73 -65 -65 MHz dB dB
Specification Min. Typ. Max.
Unit
Condition
T=25C, VCC =9V or 24V, 75 System, RFIN =-10dBm
From 5MHz to 150MHz, -30C to +70C.
Output IP3
Second Harmonic
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
3-4
Rev C6 051025
RF2312
Pin 1 Function RF IN Description
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 1k 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 30 (0.5W) for VCC =9V and 21 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
Interface Schematic
2 3 4 5 6 7 8
GND GND GND GND GND GND RF OUT
RF IN
Rev C6 051025
3-5
RF2312
Application Schematic 5MHz to 50MHz Reverse Path
VCC
30
100 nF
100 nF
10 nF RF IN
RS 1 - 2 k 1 2 3 4 8
10 H RF OUT 10 nF 7 6 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 RF IN R5 1 - 2 k 1 2 C4 TBD R6 7.5 3 4
R2 470
R1 = 21 - 30
L1 330 nH 8 7 6 5 R7 7.5 C2 220 pF RF OUT
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 reactive at the lowest operating frequency. C1 and C2 should be less than 10 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 2 3 CON3 GND
120
120
120
120
0.1 uF
V
U1
1
616PT1030
8 7 6 5
RF2312 616PT1030 U2
F EDGE
2 3 4
F EDGE
V 8 7 6 5
1 2 3 4
RF2312
Rev C6 051025
3-7
RF2312
Application Schematic Push-Pull 24V
P1 1 2 3 CON3 GND
120
120
120
120
0.1 uF
2400 1
616PT1030
U1
10 uH 8 7 6 0.1 uF 5 10 nF
616PT1030
10 nF
2 3 4
F EDGE
F EDGE
10 nF
RF2312
47 nF
2400
63 nF
10 uH
120
120
120
120
U2
10 nF 1 2 3 4
RF2312
8 7 6 5
3-8
Rev C6 051025
RF2312
Evaluation Board Schematic - 50
(Download Bill of Materials from www.rfmd.com.)
P1 H3M P1-1 1 2 3 VCC (9 V) GND NC R1 120 R2 120 R3 120 R4 120 C2 100 nF L1 330 nH 1 2 3 4 8 7 6 5 C3 220 pF micro strip C4 100 nF P1-1
J1 SMA
micro strip
C1 220 pF
OUT J2 SMA
2312400A
Evaluation Board Schematic - 75
P1-1 P1 P1-1 1 2 3 CON3 C1 1 nF 1 2 3 4 8 7 6 5 C3 1 nF L1 1000 nH OUT micro strip J2 F CONN (75) VCC GND NC R4 120 R1 120 R2 120 R3 120 C3 0.1 uF
J1 F CONN (75)
micro strip
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 - 50 2.02" x 2.02"
Board Thickness 0.031", Board Material FR-4
3-10
Rev C6 051025
RF2312
Evaluation Board Layout - 75 Standard Voltage 1.40" x 1.40"
Board Thickness 0.062", Board Material FR-4
Rev C6 051025
3-11
RF2312
Evaluation Board Layout - 75 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 - 75 Push-Pull, 24V 1.70" x 1.50"
Board Thickness 0.062", Board Material FR-4
Rev C6 051025
3-13
RF2312
20.0
POUT versus PIN 500 MHz
140.0 Rs=1k 120.0 No Rs
ICC versus Device Voltage (Pin 8)
15.0 100.0
POUT (dBm)
10.0
ICC (mA)
80.0
60.0
40.0 5.0 20.0
0.0 -15.0 -10.0 -5.0 0.0 5.0
0.0 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
PIN (dBm)
Device Voltage (V)
50.0
Output Third Order Intercept Point (OIP3) versus PIN 500 MHz
Output P1dB versus Frequency
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
40.0
20.0
30.0
Output P1dB (dBm)
-10.0 -5.0 0.0 5.0
Output IP3 (dBm)
15.0
20.0
10.0
10.0
5.0
0.0 -15.0
0.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0
PIN (dBm)
Frequency (MHz)
70.0
IM3 Products versus POUT 500/501 MHz
60.0
50.0
IM3 Products (-dBc)
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 1 900.000 000 MHz
CH1
S 21
log MAG
10 dB/
REF 0 dB
4_: 14.454 dB 1 900.000 000 MHz
C2
1_: 97.188 -1.5742 50 MHz 2_: 93.512 -13.215 450 MHz 3_: 84.16 -22.945 900 MHz
C2
1_: 15.372 dB 50 MHz 2_: 15.307 dB 450 MHz 3_: 15.184 dB 900 MHz 4
1
2
3
4 3
1 2
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 1 900.000 000 MHz
.300 000 MHz log MAG 10 dB/ REF 0 dB
STOP 3 000.000 000 MHz 4_:-17.966 dB 1 900.000 000 MHz
CH1
S 12
C2
1_: 115.2 -6.6211 50 MHz 2_: 87.551 -42.652 450 MHz 3_: 52.43 -44.855 900 MHz
C2
1_:-19.908 dB 50 MHz 2_:-19.87 dB 450 MHz 3_:-19.554 dB 900 MHz
1 4 2 3
4
1
2
3
START
.300 000 MHz
STOP 3 000.000 000 MHz
START
.300 000 MHz
STOP 3 000.000 000 MHz
Rev C6 051025
3-15
RF2312
75 Ohms, ICC = 100 mA, Temp = 25C
1.0
6 0.
75 Ohms, ICC = 110 mA, Temp = 25C
1.0
6 0.
Swp Max 2.001GHz
2. 0
Swp Max 2.001GHz
2. 0
0.8
3.
0
0.8
0. 4
10.0
10.0
S[2,2] S[1,1]
2 -0.
-10.0
S[2,2] S[1,1]
2 -0.
-10.0
.4 -0
.4 -0
-0 .6
-0.8
-0 .6
Swp Min 0.001GHz
-0.8
.0 -2
.0 -2
Swp Min 0.001GHz
-1.0
3-16
-1.0
Rev C6 051025
-4 .0 -5. 0
10.0
-3 .0
0.2
0.4
0.6
0.8
1.0
2.0
3.0
4.0
5.0
0.2
0.4
0.6
0.8
1.0
2.0
3.0
4.0
5.0
0
0
0.2
-4 .0 -5. 0
-3 .
0
0. 4
0 3.
0 4.
0 4.
5.0
5.0
0.2
10.0

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