AM55-0023 查看數據表（PDF） - Tyco Electronics
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AM55-0023 Datasheet PDF : 4 Pages
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Variable Voltage Gain Control Amplifier, 2.0 GHz
AM55-0023
Operating Instructions
Two pins, VCTL1 and VCTL2 control the attenuation function
of this part. Varying these pins between 0 and 4.5 V controls the
attenuation. VCTL1 should be controlled first to avoid
degrading the input match and noise figure until more
attenuation is needed. VCTL1 controls an attenuator with 30
dB of range and VCTL2 15dB of range.
The AM55-0023 has two sets of Vdd pins. VDDA1,2 ,3 and
VDDB1,2,3. VDDA should be supplied with 5 V. This voltage
is internally stepped down to 3 V to reduce current
consumption. If current consumption is not a concern OR only
3 V is available to the part then the VDDB pins should be used.
Using the VDDB pins with 5 V will also give greater IP3/IMD
performance (See graphs).
Note: When using one set of bias pins the other should be left
open circuited.
Absolute Maximum Ratings1
Parameter
Input Power2
Operating Voltages2
Operating Temperature
Absolute Maximum
+20 dBm
VDDA/B1,2,3 = +6 volts
-40 °C to +85 °C
Storage Temperature
-65 °C to +150 °C
1. Exceeding any one or combination of these limits may cause
permanent damage.
2. Ambient Temperature (TA) = +25°C
Pin Configuration
PIN
PIN
No.
Name
Description
1
Input
RF Input
2
NC
3
NC
4
NC
5
VCTL2
Second Attenuation Control
6
NC
7
NC
8
NC
9
VCTL1
First Attenuation Control
10
NC
11
NC
12
NC
13
Output
RF Output
14
VDDB3
Bias Pins
15
VDDA3
Bias Pins
16
VDDA2
Bias Pins
17
VDDB2
Bias Pins
18
VDDB1
Bias Pins
19
VDDA1
Bias Pins
20
NC
Typical Performance Curves
Output Return Loss
(over full attenuation range
0
-5
-10
-15
-20
-25
0.6
0.8
1
1.2
1.4
1.6
1.8
2
FREQUENCY (GHz)
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266, Fax (800) 618-8883
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
Input Return Loss
(over full attenuation range)
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
0.6
0.8
1
1.2
1.4
1.6
1.8
2
FREQUENCY (GHz)
V 2.0
2
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