Directional Detector
DD01-92
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
Description
Pin Out
DC Bias/AC GND
4
3
RF In
5
2
Temp Comp Out
6
DC Bias/AC GND
DD1
RF Out
1
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.
Detected Out
Electrical Specifications at 25°C
Frequency
Min.
Typ.
Detected Voltage
Parameter
0.8–1.2 GHz
1.8–2.0 GHz
80
150
120
200
Insertion Loss
870–920 MHz
1.7–1.8 GHz
Input Return Loss
Output Return Loss
Unit
mV
mV
0.30
0.55
dB
dB
0.8–1.2 GHz
1.2–2.0 GHz
20
15
dB
dB
0.8–1.2 GHz
1.2–2.0 GHz
20
15
dB
dB
200
µV
Directivity
0.8–2.0 GHz
Schottky Noise Voltage (1 MHz Bandwidth)
RF Power Off
0.25
0.50
Max.
10
dB
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
Conditions: 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V4–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.
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
1
Directional Detector
DD01-92
Typical Performance Data
0.8
Detected Voltage (V)
0.7
0.6
0.5
15 dBm
0.4
0.3
10 dBm
0.2
5 dBm
0.1
-5
0
5
10
15
Frequency (GHz)
Differential Detected Voltage
vs. Frequency
Differential Detected Voltage
vs. Input Power
0
-10
-20
-30
Input Return Loss
-0.8
-40
-1.0
-50
Output Return Loss
-1.2
0.5
1.0
1.5
2.0
Return Loss (dB)
-0.4
-0.6
1000
17 dBm
Insertion Loss
-0.2
-60
2.5
10 dBm
100
10
-40
0 dBm
-20
0
20
40
60
80
Frequency (GHz)
Temperature (˚C)
Insertion Loss and Return Loss
Temperature Sensitivity at 1.7 GHz
Typical Detected Voltage vs. Temperature
10.000
+85˚C
1.000
Input Power
(dBm)
+25˚C
-40˚C
0.100
VOut @ -40°C
(mV)
VOut @ +25°C
(mV)
VOut @ +85°C
(mV)
0
74
64
59
10
241
230
226
17
570
550
550
Conditions: 1.7 GHz, 10 dBm input power, 1 V applied to test circuit.
Detected voltage is differential voltage, V4–V3, on test circuit.
0.010
0
0.5
1.0
1.5
Forward Voltage (V)
Schottky Diode DC Characteristic
2
20
Input Power (dBm)
0
Insertion Loss (dB)
0.010
0.001
-10
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
Forward Current (mA)
1.8 GHz
0.9 GHz
0
0.001
0.100
Detected Voltage (mV)
Detected Voltage (V)
1.000
20 dBm
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
Directional Detector
DD01-92
SC-88 (6 Lead SC-70)
Absolute Maximum Ratings
Characteristic
0.079 (2.00 mm)
± 0.008 (0.20 mm)
0.0256 (0.65 mm)
BSC
0.087 (2.20 mm)
± 0.008 (0.20 mm)
0.049 (1.25 mm)
± 0.004 (0.10 mm)
Value
Incident Power (CW)
@ SWR = 2.0 Max.
4 W @ < 1 GHz
2 W @ 1–2.5 GHz
DC Bias Current
10 mA
Operating Temperature
-40 to +85°C
Storage Temperature
-65 to +150°C
0.009 (0.23 mm)
REF
PIN 1 INDICATOR
0.035 (0.90 mm)
± 0.004 (0.10 mm)
0.010 (0.25 mm)
± 0.006 (0.15 mm)
0.0055
(0.14 mm)
± 0.0015
(0.04 mm)
0.002 (0.005 mm)
± 0.002 (0.005 mm) 0.037 (0.95 mm)
± 0.006 (0.15 mm)
Test Circuit
RF In
RF In
100 kΩ
0.008 (0.20 mm)
± 0.004 (0.10 mm)
6
5
4
1
2
3
100 pF
Detected
Output
Evaluation Board Layout
100 k
RF In
RF Out
SK38908
DD0*-92
15 pF
Detect Out
100 pF
RF Out Direct
100 pF
RF Out
Bias In
22 nH
100 k
1V
Bias
+
–
100 kΩ
Temperature
Compensation Out
100 pF
22 nH
15 pF
Temp.
Comp. Out
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
3
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.