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
s
Frequency Coverage: 650 MHz to 2.5 GHz
s
Small Outline SC-88 (6 Lead SC-70)
Package
s
Built-in Temperature Compensating Diode
s
Low Cost for High Volume Handset
Applications
s
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
A by applying 1 V
through 100 k
resistors as shown in the test circuit.
12
3
65
4
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
0.81.2 GHz
80
120
mV
1.82.0 GHz
150
200
mV
Insertion Loss
870920 MHz
0.25
0.30
dB
1.71.8 GHz
0.50
0.55
dB
Input Return Loss
0.81.2 GHz
20
dB
1.22.0 GHz
15
dB
Output Return Loss
0.81.2 GHz
20
dB
1.22.0 GHz
15
dB
Directivity
0.82.0 GHz
10
dB
Schottky Noise Voltage (1 MHz Bandwidth)
RF Power Off
200
V
Schottky Diode DC Voltage
RF Power Off
480
mV
DC Offset Voltage
RF Power Off
10
mV
Video Resistance
RF Power Off
7,500
Electrical Specifications at 25C
Conditions: 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V
4
V
3
, on test circuit.
Insertion loss at 870920 MHz shall be less than 0.4 dB at 85C.
Insertion loss at 1.71.8 GHz shall be less than 0.6 dB at 85C.
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)
+85C
+25C
-40C
Conditions: 1.7 GHz, 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V
4
V
3
, on test circuit.
Input Power
V
Out
@ -40C
V
Out
@ +25C
V
Out
@ +85C
(dBm)
(mV)
(mV)
(mV)
0
74
64
59
10
241
230
226
17
570
550
550
Typical Detected Voltage vs. Temperature
Directional Detector
DD01-92
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
3
Specifications subject to change without notice. 1/01A
Characteristic
Value
Incident Power (CW)
4 W @ < 1 GHz
@ SWR = 2.0 Max.
2 W @ 12.5 GHz
DC Bias Current
10 mA
Operating Temperature
-40 to +85C
Storage Temperature
-65 to +150C
Absolute Maximum Ratings
0.079 (2.00 mm)
0.008 (0.20 mm)
0.049 (1.25 mm)
0.004 (0.10 mm)
0.008 (0.20 mm)
0.004 (0.10 mm)
0.087 (2.20 mm)
0.008 (0.20 mm)
0.035 (0.90 mm)
0.004 (0.10 mm)
0.002 (0.005 mm)
0.002 (0.005 mm) 0.037 (0.95 mm)
0.006 (0.15 mm)
0.010 (0.25 mm)
0.006 (0.15 mm)
0.0055
(0.14 mm)
0.0015
(0.04 mm)
0.0256 (0.65 mm)
BSC
0.009 (0.23 mm)
REF
PIN 1 INDICATOR
SC-88 (6 Lead SC-70)
15 pF
RF Out
22 nH
Bias In
Temp.
Comp. Out
100 k
100 k
100 pF
100 pF
Detect Out
RF In
SK38908
DD0*-92
Evaluation Board Layout
RF In
RF In
RF Out
6
5
4
3
2
1
100 pF
15 pF
22 nH
1 V
Bias
100 k
Detected
Output
RF Out Direct
Temperature
Compensation Out
100 pF
100 k
+
Test Circuit
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