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RF2619
10
Typical Applications
* 3V CDMA/FM Cellular Systems * Supports Dual-Mode AMPS/CDMA * Supports Dual-Mode TACS/CDMA * General Purpose Linear IF Amplifier * Portable Battery-Powered Equipment * Commercial and Consumer Systems
3V CDMA/FM TRANSMIT AGC AMPLIFIER
Product Description
The RF2619 is a complete AGC amplifier designed for the transmit section of 3V dual-mode CDMA/FM cellular applications. It is designed to amplify IF signals while providing more than 84dB of gain control range. Noise Figure, IP3, and other specifications are designed to be compatible with the IS-95 Interim Standard for CDMA cellular communications. This circuit is designed as part of the RFMD CDMA Chip Set, consisting of this Transmit IF AGC Amp, a Transmit Upconverter, a Receive LNA/Mixer, and a Receive IF AGC Amp. The IC is manufactured on an advanced high frequency Silicon Bipolar process and is packaged in a standard miniature 16-lead plastic SSOP package.
0.157 0.150 0.012 0.008 0.196 0.189 0.025
-A0.0098 0.0040
0.2440 0.2284
0.0688 0.0532
8 MAX 0MIN
0.050 0.016
0.0098 0.0075
NOTES: 1. Shaded lead is Pin 1. 2. All dimensions are excluding mold flash. 3. Lead coplanarity - 0.005 with respect to datum "A".
Optimum Technology Matching(R) Applied
Si Bi-CMOS
SiGe HBT
Si CMOS
* Supports Dual Mode Operation
CDMA+ 1 CDMA- 2 GND 3 GND 4 GND 5 GND 6 GND 7 NC 8 GAIN CONTROL 16 GC 15 VCC 14 VCC 13 VCC
* -48dB to +42dB Gain Control Range * Single 3V Power Supply * Monolithic Construction * 12MHz to 175MHz Operation * Miniature Surface Mount Package
12 GND 11 GND 10 OUT+ 9 OUT-
Ordering Information
RF2619 RF2619 PCBA 3V CDMA/FM Transmit AGC 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 B5 010720
10-25
IF AMPLIERS
uSi BJT
Package Style: SSOP-16
10
GaAs HBT
GaAs MESFET
Features
RF2619
Absolute Maximum Ratings Parameter
Supply Voltage Control Voltage Input Power Levels Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +7.0 -0.5 to +5.0 +10 -40 to +85 -40 to +150
Unit
VDC V 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
Specification Min. Typ. Max.
Unit
Condition
T=25C, 130MHz, VCC =3.0V, Pin=40dBm, ZS =1k, ZL =1k, 1k External Output Terminating Resistor (Effective ZL =500) (See Application Example)
Overall
Frequency Range Maximum Gain Minimum Gain Gain Slope Gain Control Voltage Range Gain Control Input Impedance Noise Figure Input IP3 Input Impedance Stability (Max VSWR) 12 to 175 +42 -48 57 0 to 3 30 10.5 -25 1 10:1 2.7 to 3.3 23 22 V mA mA MHz dB dB dB/V VDC k dB dBm k
+39
-45
VGC =2.4V VGC =0.3V Measured in 0.5V increments
13
-26
At maximum gain and 130MHz At +10 gain and referenced to 1k, Pin=-45dBm per tone Differential Spurious<-70dBm
Power Supply
10
IF AMPLIERS
Voltage Current Consumption Current Consumption
25 24
Maximum gain, VCC =3.0V Minimum gain, VCC =3.0V
10-26
Rev B5 010720
RF2619
Pin 1 Function CDMA+ Description
CDMA balanced input pin. This pin is internally DC-biased and should be DC-blocked if connected to a device with a DC level, other than VCC, present. A DC to connection to VCC is acceptable. For single-ended input operation, one pin is used as an input and the other CDMA input is AC-coupled to ground. The balanced input impedance is 1k, while the single-ended input impedance is 500. Same as pin 2, except complementary input. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. Same as pin 3. Same as pin 3. Same as pin 3. Same as pin 3. No Connection pin. This pin is internally biased and should not be connected to any external circuitry, including ground or VCC. Balanced output pin. This is an open-collector output, designed to operate into a 500 balanced load. The load sets the operating impedOUT+ OUTance, but an external choke or matching inductor to VCC must also be supplied in order to correctly bias this output. This bias inductor is typically incorporated in the matching network between the output and next stage. Because this pin is biased to VCC, a DC-blocking capacitor must be used if the next stage's input has a DC path to ground. Same as pin 9, except complementary output. See pin 9 schematic. Same as pin 3. Same as pin 3. Supply Voltage pin. External 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. Pins 13, 14, and 15 may share one bypass capacitor if trace lengths are kept minimal. Same as pin 13. Same as pin 13. Analog gain adjustment for all amplifiers. Valid control ranges are from 0V to 3.0V. Maximum gain is selected with 3.0V. Minimum gain is selected with 0V. These voltages are valid only for a 3.3k DC source impedance.
VCC
Interface Schematic
VCC
580 CDMA+
580 CDMA-
2 3 4 5 6 7 8 9
CDMAGND GND GND GND GND NC OUT-
See pin 1 schematic.
10 11 12 13
OUT+ GND GND VCC
10
IF AMPLIERS
14 15 16
VCC VCC GC
12.7 k 23.5 k 15 k
Rev B5 010720
10-27
RF2619
Application Schematic
Measurement Reference Plane ZS=1 k IN+ 10 nF INZIN=1 k 2 3 4 5 6 7 8
10 nF 1 GAIN CONTROL 16 15
3.3 k GAIN
10 nF 14 10 nF 13 VCC 12 11 10 9 ZLOAD,EFF=500 R2 sets the balanced output impedance to 1 k . L1 and C2 serve dual purposes. L1 serves as an output bias choke, and C2 serves as a series DC block. In addition, the values of L1 and C2 may be chosen to form an impedance matching network if the load impedance is not 1k . Otherwise, the values of L1 and C1 are chosen to form a parallel-resonant tank circuit at the IF when the IF filter's input impedance is 1 k . C1 L1 ZOUT=1 k VCC 10 nF Measurement Reference Plane C1 L1 C2 R2: 1 k C2 OUTZLOAD=1 k CDMA Filter OUT+
10
IF AMPLIERS
10-28
Rev B5 010720
RF2619
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
CDMA J1 SMA C1 5.1 pF C3 0.01 F 1 2 C2 5.1 pF L2 270 nH C4 0.01 F L1 270 nH 3 4 5 P1 P1-1 1 2 P1-3 3 VCC GND GC 8 9 6 7 GAIN CONTROL 16 15 14 13 12 11 10 R2 1k L3 100 nH C8 36 pF C5 36 pF C6 0.01 F P1-1 L4 100 nH C9 20 pF T2
WB3040
50 strip
T1
R1 3.3 k C12 0.01 F P1-3
P1-1 C10 0.01 F C11 0.01 F
OUT 50 strip J2 SMA
2619400A
C7 20 pF
10
IF AMPLIERS
Rev B5 010720
10-29
RF2619
Evaluation Board Layout
10
IF AMPLIERS
10-30
Rev B5 010720
RF2619
Gain versus Gain Control Voltage
60.0 50.0 40.0 30.0 20.0
RF2619 Gain versus Gain Control Voltage
60.0 50.0 40.0 30.0 20.0
(VCC=2.7V, 130MHz)
(VCC=3.0 V, 130 MHz)
Gain (dB)
-30 C +25 C +80 C
Gain (dB)
10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 0.0 0.5 1.0 1.5 2.0 2.5
10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 0.0 0.5 1.0 1.5 2.0 2.5 -30 C +25 C +80 C
GC (V)
GC (volts)
Gain versus Gain Control Voltage
60.0 50.0 40.0 30.0 20.0
-10.0 0.0
IIP3 versus Gain
10.0
(VCC=3.3 V, 130 MHz)
(VCC=2.7 V, 130 MHz)
Gain (dB)
0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 0.0 0.5 1.0 1.5 2.0 2.5 -30 C +25 C + 80 C
IIP3 (dB)
10.0
-20.0
-30.0
10
-30 C +25 C +80 C
-40.0
-50.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
GC (V)
Gain (dB)
IIP3 versus Gain
10.0
IIP3 versus Gain
10.0
(VCC=3.0 V, 130 MHz)
(VCC=3.3 V, 130 MHz)
0.0
0.0
-10.0
-10.0
IIP3 (dB)
-20.0
IIP3 (dB)
-20.0
-30.0
-30.0
-40.0
-30 C +25 C +80 C
-40.0
-30 C +25 C + 80 C
-50.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
-50.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
Gain (dB)
Gain (dB)
Rev B5 010720
10-31
IF AMPLIERS
RF2619
OIP3 versus Gain
20.0 10.0 0.0 -10.0
OIP3 versus Gain
20.0 10.0 0.0 -10.0
(VCC=2.7 V, 130 MHz)
(VCC=3.0 V, 130 MHz)
OIP3 (dB)
-20.0 -30.0 -40.0 -50.0 -30 C -60.0 -70.0 -60.0 +25 C +80 C -40.0 -20.0 0.0 20.0 40.0 60.0
NF (dB)
-20.0 -30.0 -40.0 -50.0 -60.0 -70.0 -60.0 -30 C +25 C +80 C -40.0 -20.0 0.0 20.0 40.0 60.0
Gain (dB)
Gain (dB)
OIP3 versus Gain
20.0 10.0 50.0 0.0 -10.0 40.0
Noise Figure versus Gain
60.0
(VCC=3.3 V, 130 MHz)
(VCC=2.7 V, 130 MHz)
-30 C +25 C +80 C
OIP3 (dB)
-20.0 -30.0 -40.0 -50.0
NF (dB)
-30 C +25 C + 80 C -40.0 -20.0 0.0 20.0 40.0 60.0
30.0
10
IF AMPLIERS
20.0
10.0
-60.0 -70.0 -60.0
0.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
Gain (dB)
Gain (dB)
Noise Figure versus Gain
60.0
Noise Figure versus Gain
60.0 -30 C +25 C
(VCC=3.0 V, 130 MHz)
(VCC=3.3 V, 130 MHz)
-30 C +25 C
50.0
+80 C
50.0
+ 80 C
40.0
40.0
NF (dB)
30.0
NF (dB)
-40.0 -20.0 0.0 20.0 40.0 60.0
30.0
20.0
20.0
10.0
10.0
0.0 -60.0
0.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
Gain (dB)
Gain (dB)
10-32
Rev B5 010720

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