RF2420
9
Typical Applications
鈥?Power Control in Communication Systems
鈥?CMOS Compatible Programmable
Attenuators
鈥?Commercial and Consumer Systems
鈥?Portable Battery-Powered Equipment
PROGRAMMABLE ATTENUATOR
Product Description
The RF2420 is a multistage monolithic programmable
attenuator. The device is built using an advanced Gallium
Arsenide process technology and has an attenuation pro-
grammability over a 44dB range in 2dB steps. The atten-
uation is set by five bits of digital data. The input and
output of the device have a low VSWR 50鈩?match. This
unit is intended for use in systems that require RF trans-
mit power control by digital means. Typical applications
are in dual mode IS-54/55 compatible cellular transceiv-
ers and TETRA systems. No negative supply voltages
are required.
0.157
0.150
-A-
0.008
0.004
0.393
0.386
0.018
0.014
0.050
0.244
0.229
8擄 MAX
0擄 MIN
0.009
0.007
0.068
0.053
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廬 Applied
Si BJT
Si Bi-CMOS
GaAs HBT
SiGe HBT
Si CMOS
眉
GaAs MESFET
16 G2
Package Style: SOIC-16
Features
鈥?Single 3V to 6V Supply
鈥?0dB to 44dB Attenuation Range
鈥?4dB Insertion Loss
鈥?5-bit Digitally Controlled Attenuation
鈥?Digitally Controlled Power Down Mode
鈥?DC to 950MHz Frequency Range
RF IN 1
2 dB
VDD 2
VDD 3
VDD 4
8 dB
VDD 5
VDD 6
VDD 7
20 dB
VDD 8
10 dB
4 dB
15 G4
14 G8
13 GND
12 GND
11 G10
10 G20
9 RF OUT
Ordering Information
RF2420
RF2420 PCBA
Programmable Attenuator
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 A6 010720
9-9
ATTENTUATORS AND
SWITCHES
0.034
0.016
9
1
2
3
4
5
6
