MADR-007098
Linear Driver for
PIN Diode Attenuators
Rev. V2
Features
Linearizes PIN Diode Attenuators Over a Wide
Attenuation Range
Output Currents up to 12 mA
Operates with a Single Supply Voltage of +3V to
+12V
Low Quiescent Currents
Single Control Voltage
Test Boards are Available
Tape and Reel Packaging Available
Lead-Free SOW-16 Package
100% Matte Tin Plating over Copper
Halogen-Free “Green” Mold Compound
260°C Reflow Compatible
RoHS* Compliant Version of DR65-0002
Description
M/A-COM's MADR-007098-000100 is a break point
free driver that produces a logarithmic output current
suitable for linearizing PIN diode based shunt
attenuators. This driver, in conjunction with customer
defined external components, produces a linear
transfer function (dB/V) between the input control
voltage of the driver and the attenuation output of
the PIN attenuator. The MADR-007098-000100 has
been optimized for linearizing M/A-COM’s MAAV007089-000100 or MAAV-007090-000100
attenuators, but will function well with most types of
cathode grounded, PIN attenuators. The driver is
packaged in a SOW-16 package for commercial
SMT applications. A typical schematic for a 30 dB,
7.5 dB/V linear attenuator is shown in Figure 1.
Circuit Description:
(Reference Figures 1 and 2)
The input divider, R1 and the sum of R2 and R3,
sets the overall transfer function of the circuit. To
increase the transfer function, decrease the Control
Voltage and the value of R1. Varying the value of
R4 will optimize the linearity of the circuit. One can
achieve a very linear transfer function (less than
± 1 dB/V) by driving the attenuator over a smaller
portion of its dynamic range. In the case of the
MAAV-007089-000100 and MAAV-007090-000100
attenuators, this would be limited to a dynamic
range of 28 and 25 dB, respectively. Temperature
compensation is a function temperature coefficient
of the thermistor, R3, and the ratio of R2 to R3, and
can only be optimized once the transfer function
and linearity component values have been
established.
Pin Configuration
Pin No.
Function
Pin No.
Function
1
N/C
9
N/C
2
N/C
10
N/C
3
REF
11
N/C
Ordering Information
Part Number
Package
4
INPUT +
12
OUTPUT
MADR-007098-000100
Bulk Packaging
5
GND
13
N/C
MADR-007098-0001TR
1000 piece reel
6
N/C
14
+ VCC
MAAV-007089-DR01TB
Test Board with Circuit per Figure 1
(MAAV-007089-000100,
GSM Attenuator)
7
N/C
15
N/C
8
N/C
16
N/C
MAAV-007090-DR01TB
Test Board with Circuit per Figure 1
(MAAV-007090-000100,
PCS Attenuator)
Note: Reference Application Note M513 for reel size
information.
1
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
MADR-007098
Linear Driver for
PIN Diode Attenuators
Rev. V2
Figure 1. Linear Attenuator Schematic
RFin
+Vcc
C1
.01 µF
R1
2
1,3,4
16,14,13
14
4
Vcontrol
(0 to 4V)
IN
39K
R2
MADR-007098
-000100
680
3
R3
(PTCT)
330
R4
12
VOLTAGE
VARIABLE
ATTENNUATOR
7
REF
5,6,8
9,11,12
5
360
10
RFoutput
NOTES:
a. Transfer function is 7.5 dB/V
b. Vcontrol is 0V to 4.0V
c. +Vcc is 5.0V ± 5%
d. R3 is a positive temperature coefficient thermistor.
e. Attenuator is MAAV-007089-000100 or MAAV-007090-000100
Figure 2. Typical Attenuation Error
MADR-007098-000100 Driver with MAAV-007090-000100 VVA
2.0
Attenuation Error (dB)
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0
2
3
Frequency: 1960 M Hz
Vco nt: 0 to 4.0V
6
9
12
15
18
21
24
27
30
Attenuation (dB)
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
MADR-007098
Linear Driver for
PIN Diode Attenuators
Rev. V2
Electrical Specifications: TA = 25°C, Z0 = 50
Parameter
Test Conditions
Units
Min
Typ
Max
Output Drive Current
Load Dependent
mA
10
—
—
+VCC Supply Range
—
V
3.0
5.0
12
+VCC Supply Tolerance
—
%
—
5
—
+VCC Quiescent Current
No Load
mA
—
1.0
2.0
Linearity
Application Dependent
dB
±1
± 2.5
—
Transfer Function
Application Dependent
dB/V
3
7.5
10
Settling Time
50% Ctl to 90%/10% RF
µs
—
50
—
Absolute Maximum Ratings 1,2
Parameter
Absolute Maximum
+VCC
+20 V
Handling Procedures
Input +
±5V
REF
±5V
Please observe the following precautions to avoid
damage:
Output Current
20 mA
Operating Temperature
-40ºC to +85ºC
Storage Temperature
-65ºC to +125ºC
Package Power Dissipation
150 mW
Lead Temperature
300ºC for 10 seconds
1. Exceeding any one or combination of these limits may cause
permanent damage to this device.
2. M/A-COM does not recommend sustained operation near
these survivability limits.
Static Sensitivity
Gallium Arsenide Integrated Circuits are sensitive
to electrostatic discharge (ESD) and can be
damaged by static electricity. Proper ESD control
techniques should be used when handling these
devices.
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
MADR-007098
Linear Driver for
PIN Diode Attenuators
Rev. V2
Lead-Free, SOW-16†
†
Reference Application Note M538 for lead-free solder reflow
recommendations.
4
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
MADR-007098
Linear Driver for
PIN Diode Attenuators
Rev. V2
M/A-COM Technology Solutions Inc. All rights reserved.
Information in this document is provided in connection with M/A-COM Technology Solutions Inc ("MACOM")
products. These materials are provided by MACOM as a service to its customers and may be used for
informational purposes only. Except as provided in MACOM's Terms and Conditions of Sale for such products or
in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM
assumes no responsibility for errors or omissions in these materials. MACOM may make changes to
specifications and product descriptions at any time, without notice. MACOM makes no commitment to update
the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future
changes to its specifications and product descriptions. No license, express or implied, by estoppels or otherwise,
to any intellectual property rights is granted by this document.
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WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
5
MACOM products are not intended for use in medical, lifesaving or life sustaining applications. MACOM
customers using or selling MACOM products for use in such applications do so at their own risk and agree to
fully indemnify MACOM for any damages resulting from such improper use or sale.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support