Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~wapp/DataSheets/AK002D4-24.pdf Дата изменения: Thu Apr 20 19:23:27 2000 Дата индексирования: Tue Oct 2 07:42:15 2012 Кодировка: Поисковые слова: http www.astronomy.ru forum index.php topic 4644.0.html

GaAs IC 4 Bit Digital Attenuator With Driver 1 dB LSB DC­2 GHz
AK002D4-24 Features
s Attenuation in 1 dB Steps to 15 dB s Integral Driver ±5 V Supply Voltages s Low Cost SOIC-14 Plastic Package
0.050 (1.27 mm) 0.016 (0.40 mm) 0.158 (4.01 mm) 0.150 (3.81 mm) PIN 1 INDICATOR PIN 1 0.068 (1.73 mm) MAX.

SOIC-14
PIN 14 0.050 (1.27 mm) BSC 0.244 (6.20 mm) 0.228 (5.80 mm) 0.020 (0.51 mm) 0.013 (0.33 mm) 0.049 (1.24 mm) 0.016 (0.41 mm)

Description
The AK002D4-24 is an IC FET digital attenuator consisting of four monolithic attenuators with an LSB of 1 dB and a total attenuation of 15 dB with all attenuators connected. The device has integral drivers for each bit requiring less than 4 mA per bit. DC supply voltages of ±5 V are required. The attenuator is packaged in a 14 lead plastic SOIC.

0.016 MAX. (0.41 mm) x 45° CHAMFER 8° MAX.

0.344 (8.75 mm) 0.337 (8.55 mm) 0.010 (0.25 mm) 0.0098 (0.25 mm) 0.004 (0.10 mm) 0.0075 (0.19 mm)

0.158 (4.00 mm) 0.150 (3.80 mm)

Electrical Specifications at 25°C (+5 V, -5 V)
Parameter1 Inser tion Loss3 Frequency2 DC­0.5 GHz DC­1.0 GHz DC­2.0 GHz DC­2.0 GHz DC­0.5 GHz DC­2.0 GHz Min. Typ. 2.0 2.5 3.7 Max. 2.5 3.0 4.0 Unit dB dB dB dB

Attenuation Accuracy Per Bit4 VSWR (I/O)

10% or ±0.5 dB Whichever is Greater 1.3:1 1.6:1 1.5:1 1.8:1

Operating Characteristics at 25°C (+5 V, -5 V)
Parameter Switching Characteristics5 Condition Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru 0.50­2.0 GHz 0.05 GHz For Two-tone Input Power +13 dBm VLow VHigh +5 V ± 0.20 V @ 4 mA Typ. -5 V ± 0.20 V @ 16 mA Typ. 0.50­2.0 GHz 0.05 GHz 0.0 4.5 4.8 -4.8 Frequency Min. Typ. 20 40 30 +24 +16 +37 +26 0.2 5.0 5.2 -5.2 Max. Unit ns ns mV dBm dBm dBm dBm V V V V

Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages Supply Voltages6,7
1. 2. 3. 4. 5. 6.

All measurements made in a 50 system, unless otherwise specified. DC = 300 kHz. Inser tion loss changes by 0.003 dB/°C. Attenuation referenced to inser tion loss. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. Supply voltage and ground must be connected before control voltage is applied. Use of toggle switches or other similar components may produce voltage spikes which can cause irreversible damage to the device. 7. Current drain @ 85°C = 6 mA Typ. @ +5 V, 20 mA Typ. @ -5 V.

Alpha Industries, Inc. [781] 935-5150 · Fax [617] 824-4579 · Email sales@alphaind.com · www.alphaind.com
Specifications subject to change without notice. 3/99A

1


GaAs IC 4 Bit Digital Attenuator With Driver 1 dB LSB DC­2 GHz

AK002D4-24

Typical Performance Data (+5 V, -5 V)
5 4 3 +85°C 2 1 -40°C 5 4 3 2 1

dB

DC

1

2

dB

DC

1

2

Frequency (GHz)

Frequency (GHz)

Insertion Loss vs. Frequency
2.5 2.2 1.9 16 15 14

1, 2, 4 dB Bits vs. Frequency

dB
1.6 1.3 1.0 DC 1 2 9 8 7 DC 1 2

Frequency (GHz)

Frequency (GHz)

VSWR vs. Frequency (All States)

8, 15 dB Bits vs. Frequency

Absolute Maximum Ratings
Characteristic RF Input Power Supply Voltage Control Voltage Operating Temperature Storage Temperature JC Value 0.5 W > 500 MHz 0.1 W @ 50 MHz +6 V, -6 V +6 V 0°C to +70°C -65°C to +150°C 30°C/W

Pin Out
-5 V +5 V GND
14 13 12

C

1

C

2

C3
9

C

4

11

10

8

8 dB

1 dB

2 dB

4 dB

Truth Table
C1 8 dB 0 0 0 0 1 1 C2 1 dB 0 1 0 0 0 1 C3 2 dB 0 0 1 0 0 1 C4 4 dB 1 1 1 0 1 0 Attenuation J1­J2 Reference I.L. 1 dB 2 dB 4 dB 8 dB 15 dB

1

2

3

4

5

6

7

J

1

GND GND GND GND GND

J2

"0" = 0.0 to 0.2 V, "1" = 4.5 to 5.0 V.

2

Alpha Industries, Inc. [781] 935-5150 · Fax [617] 824-4579 · Email sales@alphaind.com · www.alphaind.com
Specifications subject to change without notice. 3/99A