RoHS
Compliant
Linear Driver for
P IN Diod e A ttenu ators
M A DR -0 0 7 0 9 8 -0 0 0 1 0 0
V 1
Features
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Linearizes PIN Diode Attenuators Over a W ide
Attenuation Range
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Output Currents up to 12 mA
Operates with a Single Supply Voltage of +3V to
+12V
Low Quiescent Currents
Single Control Voltage
Circuit Description:
(Reference Figures 1 and 2)
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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.
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 MAAV-
007089-000100 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.
Pin Configuration
Pin No.
Function
N/C
Pin No.
Function
N/C
1
2
3
4
5
6
7
8
9
Ordering Information
N/C
10
11
12
13
14
15
16
N/C
REF
N/C
Part Number
Package
INPUT +
GND
N/C
OUTPUT
N/C
MADR-007098-000100
Bulk Packaging
MADR-007098-0001TR
1000 piece reel
+ VCC
N/C
MAAV-007089-DR01TB Test Board with Circuit per Figure 1
(MAAV-007089-000100,
N/C
GSM Attenuator)
N/C
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.
Note: Die quantity varies.
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.