Transcript
GaAs MMIC High Isolation SPST Switch Positive Control 0.7–2.5 GHz AS123-12 Features
SOIC-8
■ Single Positive Control Voltage
PIN 8
0.050 (1.27 mm) BSC
■ +5 V Operation ■ High Isolation (45 dB @ 0.9 GHz, 47 dB @ 1.9 GHz)
0.244 (6.20 mm) 0.228 (5.80 mm)
PIN 1 INDICATOR
■ J1 Port Non-Reflective
0.020 (0.51 mm) MAX.
PIN 1 0.068 (1.73 mm) MAX.
Description The AS123-12 SPST IC FET switch is absorptive on the input. The switch features high isolation and low insertion loss. Ideal building block for base station applications where synthesizer isolation is critical. Use in conjunction with the AS148-24 SPDT switch to meet GSM synthesizer switch isolation requirements.
0.197 (5.00 mm) 0.189 (4.80 mm) 0.010 (0.25 mm) 0.004 (0.10 mm)
0.016 MAX. (0.41 mm) x 45˚ CHAMFER
0.049 (1.24 mm) 0.016 (0.41 mm)
0.158 (4.00 mm) 0.150 (3.80 mm) 0.010 (0.25 mm) 0.007 (0.17 mm)
8˚ MAX.
Electrical Specifications at 25°C (0, +5 V) Parameter1 Insertion
Frequency
Loss2
Min.
0.7–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz
Isolation
0.7–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz
VSWR3
0.7–1.8 GHz 1.8–2.5 GHz
39 42 30
Typ.
Max.
Unit
0.7 0.8 1.2
0.9 1.0 1.3
dB dB dB
45 47 35
dB dB dB
1.5:1 1.7:1
1.7:1 1.8:1
Typ.
Max.
Operating Characteristics at 25°C (0, +5 V) Parameter Switching Characteristics4
Condition
Frequency
Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru
Input Power for 1 dB Compression
Min.
Unit
25 150 50
ns ns mV
0.5–2.0 GHz
+28
dBm
0.5–2.0 GHz
+45
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +5 V @ 50 µA Max. to +7 V @ 200 µA Max. VS = VHigh ± 0.2 V
1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/°C. 3. Insertion loss state and J1 port. 4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email
[email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A
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GaAs MMIC High Isolation SPST Switch Positive Control 0.7–2.5 GHz
AS123-12
Typical Performance Data (0, +5 V) 1.2
70
1.1
60 50
0.9
dB
dB
1.0
0.8
40 30
0.7
20
0.6 0.5
10 0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
2.0
1.5
2.5
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
Isolation vs. Frequency
2.0
3.0
Absolute Maximum Ratings
Isolation State
Characteristic
1.8
Value
RF Input Power
2 W Max. > 500 MHz, 0/+7 V Control
Supply Voltage
+8 V
1.6 Control Voltage
1.4 Insertion Loss State 1.2
-0.2 V, +8 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
ΘJC
25°C/W
1.0 0
0.5
1.0
1.5
2.0
2.5
3.0
Pin Out
Frequency (GHz)
VSWR vs. Frequency 8
1
GND
CBL
Truth Table V1
GND
50 J1
CBL GND
4
VHigh = +5 to +7 V (VS = VHigh ± 0.2 V).
Isolation
5
VHigh
GND
6
Insertion Loss
7
0
VS
3
J1–J2
2
V1
DC blocking capacitors must be supplied externally. CBL = 100 pF for operation >500 MHz.
2
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email
[email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A
J2
