RF2422_06 [RFMD]
2.5GHZ DIRECT QUADRATURE MODULATOR; 2.5GHZ直接正交调制器
| 型号： | RF2422_06 |
| 厂家： | 
RF MICRO DEVICES |
| 描述： | 2.5GHZ DIRECT QUADRATURE MODULATOR |
| 文件： | 总6页 (文件大小：89K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RF2422
2.5GHZ DIRECT QUADRATURE MODULATOR
0
RoHS Compliant & Pb-Free Product
Typical Applications
• Digital Communications Systems
• GSM, DCS 1800, JDC, D-AMPS Systems
• Spread-Spectrum Communication Systems • Commercial and Consumer Systems
• GMSK,QPSK,DQPSK,QAM Modulation
Product Description
The RF2422 is a monolithic integrated quadrature modu-
lator IC capable of universal direct modulation for high-
-A-
0.157
0.150
0.008
0.004
frequency AM, PM, or compound carriers. This low-cost
IC implements differential amplifiers for the modulation
inputs, 90° carrier phase shift network, carrier limiting
amplifiers, two matched double-balanced mixers, sum-
ming amplifier, and an output RF amplifier which will drive
50Ω from 800MHz to 2500MHz. Component matching,
which can only be accomplished with monolithic con-
struction, is used to full advantage to obtain excellent
amplitude balance and phase accuracy.
0.018
0.014
0.393
0.386
0.050
0.068
0.053
0.244
0.229
8° MAX
0° MIN
NOTES:
1. Shaded lead is Pin 1.
2. All dimensions are excluding
mold flash.
3. Lead coplanarity - 0.005 with
respect to datum "A".
0.009
0.007
0.034
0.016
Optimum Technology Matching® Applied
Package Style: SOIC-16
Si BJT
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
9
Si Bi-CMOS
InGaP/HBT
Si CMOS
Features
SiGe Bi-CMOS
• Single 5V Power Supply
• Integrated RF Quadrature Network
• No Tuning Required
I REF
Q REF
GND2
GND2
GND2
LO
1
16 I SIG
• Low LO Input Level
2
3
4
5
6
7
8
15 Q SIG
14 GND1
13 GND1
12 GND1
11 VCC2
10 GND1
• Digitally Controlled Power Down Mode
• 800MHz to 2500MHz Operation
Σ
Ordering Information
-45°
RF2422
RF2422 PCBA
2.5GHz Direct Quadrature Modulator
Fully Assembled Evaluation Board
+45°
VCC1
PD
POWER
CONTROL
9
RF OUT
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
Rev A6 060203
5-11
RF2422
Absolute Maximum Ratings
Caution! ESD sensitive device.
Parameter
Rating
Unit
Supply Voltage
-0.5 to +7.5
V
DC
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).
Input LO and RF Levels
Operating Ambient Temperature
Storage Temperature
+10
-40 to +85
-40 to +150
dBm
°C
°C
Specification
Typ.
Parameter
Unit
Condition
Min.
Max.
T=25°C, V =5V
Carrier Input
Frequency Range
Power Level
CC
800
-6
2500
+6
MHz
dBm
Input VSWR
5:1
At 900MHz
1.8:1
1.2:1
At 1800MHz
At 2500MHz
Modulation Input
Frequency Range
Reference Voltage (V
DC
2.0
250
MHz
V
)
3.0
REF
Maximum Modulation (I&Q)
V
±1.0
V
REF
Gain Asymmetry
Quadrature Phase Error
Input Resistance
Input Bias Current
RF Output
0.2
3
30
dB
°
kΩ
μA
40
LO=2GHz and -5dBm, I&Q=2.0V , SSB
PP
Output Power
-3
+3
dBm
Output Impedance
Output VSWR
50
3.5:1
1.3:1
1.15:1
-35
35
35
35
Ω
At 900MHz
At 2000MHz
At 2500MHz
Harmonic Output
Sideband Suppression
Carrier Suppression
-30
25
30
30
dBc
dB
dB
IM Suppression
dB
Intermodulation of the carrier and the
desired RF signal
3
25
30
dB
Intermodulation of baseband signals
Broadband Noise Floor
At 20MHz offset, V =5V.
CC
Tied to V
: ISIG, QSIG, IREF, and QREF.
REF
-145
-152
dBm/Hz
dBm/Hz
At 850MHz
At 1900MHz
Power Down
Turn On/Off Time
PD Input Resistance
Power Control “ON”
Power Control “OFF”
Power Supply
Voltage
100
2.8
ns
kΩ
V
50
Threshold voltage
Threshold voltage
1.0
1.2
5
V
V
V
mA
μA
Specifications
Operating Limits
Operating
4.5
6.0
50
25
Current
45
Power Down
5-12
Rev A6 060203
RF2422
Pin
1
Function Description
Interface Schematic
Reference voltage for the I mixer. This voltage should be the same as
I REF
Q REF
GND2
Q SIG
Q REF
the DC voltage supplied to the I SIG pin. A voltage of 3.0V is recom-
mended. The SIG and REF inputs are inputs of a differential amplifier.
Therefore the REF and SIG inputs are interchangeable. If swapping the
I SIG and I REF pins, the Q SIG and Q REF also need to be swapped
to maintain the correct phase. It is also possible to drive the SIG and
REF inputs in a balanced mode. This will increase the gain.
100Ω
100Ω
425Ω
425Ω
Reference voltage for the Q mixer. This voltage should be the same as
the DC voltage supplied to the Q SIG pin. A voltage of 3.0V is recom-
mended.
2
3
Q SIG
Q REF
100Ω
100Ω
425Ω
425Ω
Ground connection of the LO phase shift network. This pin should be
connected directly to the ground plane.
Same as pin 3.
Same as pin 3.
4
5
6
GND2
GND2
LO
The input of the phase shifting network. This pin has an internal DC-
blocking capacitor. At frequencies higher than 2GHz this port is well-
matched to 50Ω. This port is voltage driven so matching at lower fre-
quencies is not required.
LO
Power supply for all circuits except the RF output stage. An external
capacitor is needed if no other low frequency bypass capacitor is
nearby.
7
8
VCC1
PD
Power Down control. When this pin is "low", all circuits are shut off. A
"low" is typically 1.2V or less at room temperature.When this pin is
VCC
200 Ω
"high" (V ), all circuits are operating normally. If PD is below V , out-
CC
CC
PD
put power and performance will be degraded. Operating in this region is
not recommended, although it might be useful in some applications
where power control is required.
This is the 50Ω RF Output. This pin has an internal DC-blocking capac-
itor. At frequencies higher than 2GHz this port is well-matched. Typical
impedances at lower frequencies are: 24-j30 Ω @ 1GHz, 27-j10 Ω @
1.4GHz, 31-j3 Ω @ 1.8GHz. At those frequencies, external matching
may be needed to optimize output power.
9
RF OUT
RF OUT
Ground connection for the RF output stage. This pin should be con-
nected directly to the ground plane.
10
11
12
GND3
VCC2
GND1
Power supply for the RF Output amplifier. An external capacitor is
needed if no other low frequency bypass capacitor is near by.
Ground connection for the LO and baseband amplifiers, and for the
mixers. This pin should be connected directly to the ground plane.
Same as pin 12.
Same as pin 12.
13
14
15
GND1
GND1
Q SIG
Baseband input to the Q mixer. This pin is DC-coupled. Maximum out- See pin 2.
put power is obtained when the input signal has a peak to peak ampli-
tude of 2V. The recommended DC level for this pin is 3.0V. The peak
minimum voltage on this pin (V
- peak modulation amplitude)
REF
should never drop below 2.0V. The peak maximum voltage on this pin
(V + peak modulation amplitude) should never exceed 4.0V.
REF
Rev A6 060203
5-13
RF2422
Pin
16
Function Description
Interface Schematic
Baseband input to the I mixer. This pin is DC-coupled. Maximum output See pin 1.
I SIG
power is obtained when the input signal has a peak to peak amplitude
of 2V. The recommended DC level for this pin is 3.0V. The peak mini-
mum voltage on this pin (V
- peak modulation amplitude) should
REF
never drop below 2.0V. The peak maximum voltage on this pin (V
peak modulation amplitude) should never exceed 4.0V.
+
REF
Application Schematic
AC-Coupled
VREF
C
R
R
R
R
I SIG
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C
C
Q SIG
S
LO IN
VCC
VCC
-45°
+45°
100 nF
100 nF
PD
POWER
CONTROL
RF OUT
100 nF
NOTE:
The values of R and C depend on the minimum
baseband frequency (i.e., the cutoff frequency of
this high pass filter should be lower than the
lowest frequency component in the I/Q spectrum).
5-14
Rev A6 060203
RF2422
Application Schematic
DC-Coupled
VREF
I SIG
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
100 nF
Q SIG
Σ
LO IN
VCC
VCC
-45°
+45°
100 nF
100 nF
POWER
CONTROL
PD
RF OUT
100 nF
Evaluation Board Schematic
1.5” x 1.5”
(Download Bill of Materials from www.rfmd.com.)
P1
1
P2
1
P1-1
NC
VCC
GND
P2-1
NC
REF
2
3
2
3
GND
50 Ω μstrip
50 Ω μstrip
J4
I SIG
P2-1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C1
100 nF
J3
Q SIG
Σ
50 Ω μstrip
J1
LO IN
P1-1
-45°
+45°
C3
100 nF
P1-1
C2
100 nF
POWER
CONTROL
50 Ω μstrip
J2
RF OUT
2422400A
Rev A6 060203
5-15
RF2422
Evaluation Board Layout
Board Size 1.510” x 1.510”
Board Thickness 0.031”, Board Material FR-4
5-16
Rev A6 060203
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