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HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
ATTENUATORS - SMT
5
Typical Applications
Features
The HMC473MS8 / HMC473MS8E is ideal for:
RoHS Compliant Product
• Cellular, UMTS/3G Infrastructure
Single Positive Voltage Control: 0 to +3V
• Portable Wireless
High Attenuation Range: 48 dB @ 0.9 GHz
• GPS
High P1dB Compression Point: +15 dBm
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Ultra Small Package: MSOP8
Replaces HMC173MS8
Functional Diagram
General Description
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The HMC473MS8 & HMC473MS8E are general
purpose absorptive voltage variable attenuators
in 8-lead MSOP packages. The devices operate
with a +3.3V supply voltage and a 0 to +3V control
voltage. Unique features include a high dynamic
attenuation range of up to 48 dB and excellent
power handling performance through all attenuation
states. The HMC473MS8 & HMC473MS8E are ideal
for operation in wireless applications from 0.45 to
1.6 GHz. Operation from 1.7 to 2.2 GHz is possible
with a reduced maximum attenuation of 29 to 32 dB.
Improved control voltage linearity vs. attenuation can
be achieved with an external driver circuit.
Electrical Specifi cations, TA = +25° C, Vdd = +3.3 Vdc, 50 Ohm System
Parameter
Attenuation Range
(Vctl = 0 to +3 V)
0.45 - 0.8 GHz
0.8 - 1.0 GHz
1.0 - 1.6 GHz
1.6 - 2.0 GHz
2.0 - 2.2 GHz
B
0.45 - 0.8 GHz
0.8 - 1.0 GHz
1.0 - 1.6 GHz
1.6 - 2.0 GHz
2.0 - 2.2 GHz
34
43
32
27
24
Typ.
Max.
Units
1.8
1.9
2.4
2.8
3.0
2.2
2.3
2.9
3.3
3.5
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
0.45 - 0.8 GHz
0.8 - 1.0 GHz
1.0 - 1.6 GHz
1.6 - 2.0 GHz
2.0 - 2.2 GHz
15
14
11
10
9
dB
dB
dB
Input Power for 0.1 dB Compression
(0.9 GHz)
Min Atten.
Atten. >2.0
20
5.5
dBm
dBm
Input Power for 1.0 dB Compression
(0.9 GHz)
Min Atten.
Atten. >2.0
28
15
dBm
dBm
Input Third Order Intercept
(0.9 GHz, Two-tone Input Power = +5.0 dBm Each Tone)
Min Atten.
Atten. >2.0
47
20
dBm
dBm
0.45 - 2.2 GHz
1.3
1.5
µS
µS
O
39
48
37
32
29
Return Loss
(Vctl = 0 to +3 V)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
5 - 156
Min.
Insertion Loss (Min. Atten.)
(Vctl = 0.0 Vdc)
24
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
-1
-5
-3
+25 C
+85 C
-40 C
-15
-20
-5
-25
0.6
0.8
1
1.2
1.4
1.6
FREQUENCY (GHz)
1.8
2
2.2
0.4
0.6
Input IP3 vs. Control Voltage @ 0.45 GHz
55
1.6
1.8
2
Input IP3 vs. Control Voltage @ 0.9 GHz
50
45
45
35
30
SO
40
25
15
0
0.5
1
1.5
2
2.5
40
35
30
25
+25 C
+85 C
-40 C
20
+25 C
+85 C
-40 C
20
15
3
0
0.5
B
CONTROL VOLTAGE (V)
Input IP3 vs. Control Voltage @ 1.9 GHz
45
INPUT IP3 (dBm)
50
45
40
35
30
2
2.5
3
40
35
30
25
+25 C
+85 C
-40 C
20
1.5
Input IP3 vs. Control Voltage @ 2.1 GHz
50
25
1
CONTROL VOLTAGE (V)
55
O
INPUT IP3 (dBm)
1
1.2
1.4
FREQUENCY (GHz)
55
50
55
0.8
LE
0.4
INPUT IP3 (dBm)
-10
TE
-2
0 V (WORSE CASE)
1.0 V
1.8 V
2.0 V
3.0 V
ATTENUATORS - SMT
0
RETURN LOSS (dB)
0
-4
5
Return Loss vs. Control Voltage
INPUT IP3 (dBm)
INSERTION LOSS (dB)
Insertion Loss vs. Temperature
+25 C
+85 C
-40 C
20
15
15
0
0.5
1
1.5
2
CONTROL VOLTAGE (V)
2.5
3
0
0.5
1
1.5
2
2.5
3
CONTROL VOLTAGE (V)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 157
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
Return Loss vs.
Control Voltage @ 0.45 GHz
0
0
-9
-5
RETURN LOSS (dB)
-18
+25 C
+85 C
-40 C
-27
-36
-10
-15
-20
-45
-25
0
0.5
1
1.5
2
2.5
3
0
CONTROL VOLTAGE (V)
0.5
1.5
2.5
3
2.5
3
2.5
3
0
-10
+25 C
+85C
-40 C
-5
SO
-20
+25 C
+85 C
-40 C
-30
-40
-50
-60
0
0.5
1
1.5
2
2.5
-10
-15
-20
-25
3
0
0.5
B
CONTROL VOLTAGE (V)
Relative Attenuation vs.
Control Voltage @ 1.9 GHz
1
1.5
Return Loss vs.
Control Voltage @ 1.9 GHz
O
0
RETURN LOSS (dB)
+25 C
+85 C
- 40 C
-20
+25 C
+85 C
-40 C
-5
-10
-15
2
CONTROL VOLTAGE (V)
-5
ATTENUATION (dB)
2
Return Loss vs.
Control Voltage @ 0.9 GHz
0
0
1
CONTROL VOLTAGE (V)
LE
Relative Attenuation vs.
Control Voltage @ 0.9 GHz
ATTENUATION (dB)
+25 C
+85 C
-40 C
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ATTENUATION (dB)
ATTENUATORS - SMT
Relative Attenuation vs.
Control Voltage @ 0.45 GHz
RETURN LOSS (dB)
5
-25
-10
-15
-20
-30
-35
-25
0
0.5
1
1.5
2
CONTROL VOLTAGE (V)
5 - 158
2.5
3
0
0.5
1
1.5
2
CONTROL VOLTAGE (V)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
Relative Attenuation vs.
Control Voltage @ 2.1 GHz
-5
+25 C
+85 C
-40 C
RETURN LOSS (dB)
-5
-10
-15
-20
-10
-15
TE
+25 C
+85 C
-40 C
-25
-20
-30
-35
-25
0
0.5
1
1.5
2
2.5
0
3
1
1.5
2
2.5
3
CONTROL VOLTAGE (V)
Relative Attenuation vs. Control Voltage
0
Worse Case Input P1dB vs. Temperature
25
INPUT P1dB (dBm)
-10
-20
-30
-40
-50
SO
ATTENUATION (dB)
0.5
LE
CONTROL VOLTAGE (V)
ATTENUATORS - SMT
0
0
ATTENUATION (dB)
5
Return Loss vs.
Control Voltage @ 2.1 GHz
1.0 V
1.5 V
1.6V
1.7 V
-60
-70
0.7
1
1.3
1.6
FREQUENCY (GHz)
1.9
2.2
15
10
+25 C
+85 C
-40 C
5
0.4
0.6
0.8
1
1.2
1.4
1.6
FREQUENCY (GHz)
1.8
2
2.2
O
B
0.4
1.8 V
2.0 V
3.0 V
20
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 159
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
5
Control and Bias Voltage
VCTL
-0.2 Vdc to Vdd
VCTL
0 to +3 Vdc @ 1 μA
Vdd
+8 Vdc
Vdd
+3.3 Vdc ± 0.1 Vdc @ 10 μA
Maximum Input Power
Vdd = +3.3 Vdc
+29 dBm
+21 dBm
Channel Temperature (Tc)
150 °C
Thermal Resistance (RTH)
(junction to lead)
92 °C/W
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
ESD Sensitivity (HBM)
Class 1A
Min. Atten.
Attenuation >2 dB
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Outline Drawing
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
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ATTENUATORS - SMT
Absolute Maximum Ratings
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS].
3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
5. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
HMC473MS8
Low Stress Injection Molded Plastic
Sn/Pb Solder
MSL1
HMC473MS8E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL1
Package Marking [3]
[1]
H473
XXXX
[2]
H473
XXXX
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
5 - 160
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
Function
Description
1, 8
RF1, RF2
These pins are DC coupled and matched to 50 Ohms.
DC blocking capacitors are required. 330pF capacitors are
supplied on evaluation board.
2, 7
GND
Pins must connect to RF ground.
3
Vctl
Control voltage
4, 5
N/C
No Connection. These pins may be connected to RF ground.
Performance will not be affected.
6
Vdd
Interface Schematic
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Pin Number
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Supply Voltage.
ATTENUATORS - SMT
5
Pin Descriptions
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 161
HMC473MS8 / 473MS8E
v01.1105
5
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
ATTENUATORS - SMT
Attenuation Linearizing Control Circuit
For The HMC473MS8 / HMC473MS8E Voltage Variable Attenuator
A driver circuit to improve the attenuation linearity of the HMC473MS8 & HMC473MS8E can be implemented with a
simple op-amp configuration. A breakpoint linearization circuit will scale the voltage supplied to the control line of the
HMC473MS8 & HMC473MS8E, so that a more linear attenuation vs. control voltage slope can be achieved. A -3.3V
and +3.3V supply is required.
TE
Diode and resistor values which define the op-amp gain, and breakpoint were selected to optimize a measured
production lot of attenuators at 0.9 GHz. R7 may be varied to optimize the performance of any given attenuator. If
the input voltage to the linearizing circuit will not drop below 1.0V, the R9 and D2 may be omitted, and this will greatly
reduce the overall power consumption of the driver circuit.
The linearizing circuit has been optimized for 0.9 GHz attenuation applications. A similar approach may be used at
other frequencies by adjusting R1 - R9 resistor values.
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Application Circuit
Required Parts List
Description
Manufacturer
AD822
Op-Amp
Analog Devices
R1
10K ohms
Panasonic
R2
200K ohms
Panasonic
R3
7.5K ohms
Panasonic
O
Part
5 - 162
R4
39K ohms
Panasonic
R5
220K ohms
Panasonic
R6
91K ohms
Panasonic
R7
910 ohms
Panasonic
R8
51 ohms
Panasonic
R9
100 ohms
Panasonic
D1, D2
LL4148 D-35
Digi-Key
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC473MS8 / 473MS8E
v01.1105
GaAs MMIC VOLTAGE VARIABLE
ATTENUATOR, 0.45 - 2.2 GHz
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ATTENUATORS - SMT
5
Evaluation PCB
List of Materials for Evaluation PCB 101827 [1]
Description
O
Item
J1 - J2
PCB Mount SMA RF Connector
J3 - J5
DC PIN
C1, C2
330pF capacitor, 0402 Pkg.
C3, C4
10KpF capacitor, 0603 Pkg.
U1
HMC473MS8 / HMC473MS8E
PCB [2]
101825 Eval Board
[1] Reference this number when ordering complete evaluation PCB
The circuit board used in the final application
should be generated with proper RF circuit design
techniques. Signal lines at the RF ports should be
50 ohm impedance and the package ground leads
should be connected directly to the PCB RF ground
plane, similar to that shown above. The evaluation
circuit board shown above is available from Hittite
Microwave Corporation upon request.
[2] Circuit Board Material: Rogers 4350
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 163