ALPHA DD01-92 Datasheet
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 1/01A
Directional Detector
Features
■ Frequency Coverage: 650 MHz to 2.5 GHz
■ Small Outline SC-88 (6 Lead SC-70)
Package
■ Built-in Temperature Compensating Diode
■ Low Cost for High Volume Handset
Applications
■ Tape and Reel Availability
DD01-92
Description
The DD01-92 directional detector is an integrated
directional coupler, Schottky diode combination designed
for handset power monitor applications specified from
800 MHz to 2 GHz. It is packaged in the small footprint,
SC-88 (6 lead SC-70) package. The DD01-92
incorporates a directional coupler and two GaAs Schottky
diodes on a monolithic GaAs chip. By applying forward
DC bias to both Schottky diodes, the DD01-92
may be conveniently temperature compensated. The
DD01-92 is characterized from 650 MHz to 2.5 GHz and
generates a detected signal at 1.8 GHz of approximately
200 mV at 10 mW input power. Each Schottky diode is
forward biased to approximately 5 µA by applying 1 V
through 100 kΩ resistors as shown in the test circuit.
123
654
RF Out
DC Bias/AC GND
Temp Comp Out
DD1
RF In
DC Bias/AC GND
Detected Out
Pin Out
Parameter Frequency Min. Typ. Max. Unit
Detected Voltage 0.8–1.2 GHz 80 120 mV
1.8–2.0 GHz 150 200 mV
Insertion Loss 870–920 MHz 0.25 0.30 dB
1.7–1.8 GHz 0.50 0.55 dB
Input Return Loss 0.8–1.2 GHz 20 dB
1.2–2.0 GHz 15 dB
Output Return Loss 0.8–1.2 GHz 20 dB
1.2–2.0 GHz 15 dB
Directivity 0.8–2.0 GHz 10 dB
Schottky Noise Voltage (1 MHz Bandwidth) RF Power Off 200 µV
Schottky Diode DC Voltage RF Power Off 480 mV
DC Offset Voltage RF Power Off 10 mV
Video Resistance RF Power Off 7,500 Ω
Electrical Specifications at 25°C
Conditions: 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V
4–V3
, on test circuit.
Insertion loss at 870–920 MHz shall be less than 0.4 dB at 85°C.
Insertion loss at 1.7–1.8 GHz shall be less than 0.6 dB at 85°C.
Directional Detector DD01-92
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 1/01A
Typical Performance Data
Differential Detected Voltage
vs. Frequency
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
Frequency (GHz)
Detected Voltage (V)
20 dBm
15 dBm
10 dBm
5 dBm
Differential Detected Voltage
vs. Input Power
0.001
0.010
0.100
1.000
-10 -5 0 5 10 15 20
Input Power (dBm)
Detected Voltage (V)
0.9 GHz
1.8 GHz
Insertion Loss and Return Loss
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.5 1.0 1.5 2.0 2.5
Frequency (GHz)
Insertion Loss (dB)
-60
-50
-40
-30
-20
-10
0
Return Loss (dB)
Insertion Loss
Input Return Loss
Output Return Loss
Temperature Sensitivity at 1.7 GHz
10
100
1000
-40 -20 0 20 40 60 80
Temperature (˚C)
Detected Voltage (mV)
17 dBm
10 dBm
0 dBm
Schottky Diode DC Characteristic
0.001
0.010
0.100
1.000
10.000
0 0.5 1.0 1.5
Forward Voltage (V)
Forward Current (mA)
+85˚C
+25˚C
-40˚C
Conditions: 1.7 GHz, 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V
4–V3
, on test circuit.
Input Power V
Out
@ -40°C V
Out
@ +25°C V
Out
@ +85°C
(dBm) (mV) (mV) (mV)
0746459
10 241 230 226
17 570 550 550
Typical Detected Voltage vs. Temperature
Loading...