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Variable Gain Amplifier
Product Features
* Multi-chip hybrid module * MESFET&HBT chip on board * 2 stage Gain Block amplifier Which includes a digital attenuator * 6-bit RF digital step attenuator covering a 31.5dB attenuation range in 0.5dB steps * Module system simplification * No External Matching Circuit Needed * Cutom Design Available * Alumina Substrate * Pb Free / RoHS Compliant
2AM Series
Application
* Repeater * Base Station * RF Sub-Systems * IMT, WCDMA, UMTS, Wimax, Wibro
Package : CP-5CS
Description
Variable Gain Amplifier 2AM Series can be used in any applications that need Gain Control according to Input Signal Level. Also, 2AM Series can be applied to various frequency system combined with GaAs MESFET or InGaP HBT MMIC. 2AM series are a hybrid module which has 2-stage Amplifier chip and Attenuator chip mounted on a Ceramic board. Attenuator is 0.5dB step 6-bit digital attenuator which has 31.5dB of total attenuation. Original version use GaAs MESFET amplifiers but RFHIC can customize the amplifier IC used in the hybrid to be either HBT, E-pHEMT or any other technology depending on specification requirements.
Electrical Specifications
Part Number
2AM0405S 2AM0905S 2AM2105S 2AM0921S 2AM2121S
Frequency (MHz)
50~200 824~960 1920~2170 400~1500 1700~2300
Gain (dB)
28 25 17 25.5 22
NF (dB)
3 3 3 6 6
P1dB (dBm)
21 21 21 21 21
OIP3 (dBm)
39 39 39 39 39
Vd (V)
5 5 5 5 5
Id (mA)
240 240 240 190 190
* 50 RF Digital Attenuator insertion. 6-bit Flexible serial programming interfaces
Absolute Maximum Ratings
PARAMETER Operating Case Temperature () Storage Temperature () Supply Voltage (V) Rating -40 ~ +85 -40 ~ +150 +6 Remark
Functional Diagram
Tel : 82-31-250-5011 rfsales@rfhic.com
Page 1/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
<2AM2121S RF data>
2AM Series

Tel : 82-31-250-5011 rfsales@rfhic.com
Page 2/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
2AM Series

Tel : 82-31-250-5011 rfsales@rfhic.com
Page 3/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
2AM Series
Variable Attenuator Accuracy (1700MHz) Attenuation Steps Data
16dB 8dB 4dB -16.20dB -8.18dB -4.13dB
Attenuation Steps
2dB 1dB 0.5dB
Data
-2.13dB -1.06dB -0.51dB
S-parameter at Full Attenuation (31.5dB) Attenuation value: -30.83dB
Variable Attenuator Accuracy (2000MHz) Attenuation Steps Data
16dB 8dB 4dB -16.21dB -8.20dB -4.22dB
Attenuation Steps
2dB 1dB 0.5dB
Data
-2.15dB -1.10dB -0.51dB
S-parameter at Full Attenuation (31.5dB) Attenuation value: -30.97dB
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Page 4/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
2AM Series
Variable Attenuator Accuracy (2300MHz) Attenuation Steps Data
16dB 8dB 4dB -16.01dB -8.03dB -4.02dB
Attenuation Steps
2dB 1dB 0.5dB
Data
-2.18dB -1.00dB -0.49dB
S-parameter at Full Attenuation (31.5dB) Attenuation value: -30.96dB
2AM2121S Attenuation setting variation
35.5
30.5
25.5
Real Value(dB)
20.5
15.5
10.5
5.5
0.5
5 5 5 5 5 5 5 5 5 5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 13 10 14 15 16 11 12 17 19 18 20 21 22 24 23 25 26 27 28 29 .5 30 31 .5
Atten Setting(dB)
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Page 5/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
Serial Data Input Timing
2AM Series
DATA
MSB
LSB
CLOCK
tES tCS
LE
tCH
tEW
6-bit Program Registor Map
MSB
B5 C16
B4 C8
B3 C4
B2 C2
B1 C1
B0 C0.5
LSB
Digital Interface Specification
Ta = 25, Vd3 = +3Vdc, Pin 8 = +3Vdc
PARAMETER Serial data clock frequency Logic High Input : VH (pins 2, 3, 4) Logic Low Input : VL (pins 2, 3, 4) Data to Clock Set Up Time : tCS Data to Clock Hold Time : tCH Clock Pulse Width High : tCWH Clock Pulse Width Low : tCWL Clock to Load Enable Set Up Time : tES Load Enable Pulse Width : tEW 10 10 30 30 10 30 0.7xVd3 0.3xVd3 MIN TYP MAX 10 UNIT MHz V V ns ns ns ns ns ns
Truth Table
16 0 0 0 0 0 0 1 8 0 0 0 0 0 1 0 4 0 0 0 0 1 0 0 2 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0.5 0 1 0 0 0 0 0 Attenuation State Reference Loss 0.5dB 1dB 2dB 4dB 8dB 16dB
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Page 6/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
2AM Series
Package Dimensions (Type: CP-5CS)
No
1 2
Description
RF Input Serial interface data input (Data) Serial interface clock input (Clock) Latch Enable input (Latch) Attenuator Power supply (Vd3) Floating
No
8 9
Description
Serial mode select RF Output 2nd-Amp. Power supply (Vd2) 1st-Amp. Power supply (Vd1) GND
3
10
4 5,7 6
11 12
No 10,11 5,7,8
Vdd 5V 3V
Recommended Pattern
! ESD sensitive
Observe precautions for handling, testing and packaging.
Tel : 82-31-250-5011 rfsales@rfhic.com
Page 7/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
Application
2AM Series
PCB Evaluation Board Layout Pattern
40mm
PCB material (FR4),
40mm
PCB thickness (0.8t),
Via hole (0.5)
RFHIC Corporation (RFHIC) reserves the right to make changes to any products herein or to discontinue any product at any time without notice. RFHIC do not assume any liability for the suitability of its products for any particular purpose, and disclaims any and all liability, including without limitation consequential or incidental damages. The product specifications herein expressed have been carefully checked and are assumed to be reliable. However, RFHIC disclaims liability for inaccuracies and strongly recommends buyers to verify that the information they are using is current before placing purchase orders. RFHIC products are not intended for use in life support equipment or application where malfunction of the product can be expected to result in personal injury or death. Buyer uses or sells such products for any such unintended or unauthorized application, buyer shall indemnify, protect and hold RFHIC and its directors, officers, stockholders, employees, representatives and distributors harmless against any and all claims arising out of such use. RFHIC's liability under or arising out of damages, claims of whatsoever kind and nature which RFHIC products could cause shall be limited in amount to the net purchase price of the products sold to buyer by RFHIC.
Tel : 82-31-250-5011 rfsales@rfhic.com
Page 8/9
All specifications may change without notice. Version 1.2
Variable Gain Amplifier
PCB Evaluation Board
2AM Series
No
nd
Description
2 -Amp. Power supply (Vd2=5v) st 1 -Amp. Power supply (Vd1=5v) GND Serial interface data input (Data) Serial interface clock input (Clock) Latch Enable input (Latch) Attenuator Power supply
1 2 3,4,11 5 6 7 Control port A 8,9
& Control board supply (Vd3=3v) Serial mode select
10 Connection
(Vdc=3V)
Attenuation Control Board
Control port B
No
1 2
Description
Serial interface port RS232 communication port Connect port A to port B S/W downloading (Only RFHIC use) Select 1 = 0.5dB Select 2 = 1dB Select 3 = 2dB Select 4 = 4dB Select 5 = 8dB Select 6 = 16dB
3 Attenuation control switch
There is no need for users to program the MCU chip on the control board. You can easily evaluate the variable gain amplifier providing voltage to the evaluation board and toggling the switches on the control board.
Tel : 82-31-250-5011 rfsales@rfhic.com
Page 9/9
All specifications may change without notice. Version 1.2

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