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PDF HMC542LP4 Data sheet ( Hoja de datos )
| Número de pieza | HMC542LP4 | |
| Descripción | 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR | |
| Fabricantes | Hittite Microwave | |
| Logotipo |  |
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HMC542LP4 / 542LP4E
v00.0306
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 3.0 GHz
Typical Applications
Features
6 The HMC542LP4 / HMC542LP4E is ideal for both RF
and IF applications:
0.5 dB LSB Steps to 31.5 dB
TTL/CMOS Compatible Serial Data Interface
• Cellular/PCS/3G Infrastructure
SPI Compatible Serial Output
• ISM, MMDS, WLAN, WiMAX, & WiBro
+/- 0.25 dB Typical Step Error
• Microwave Radio & VSAT
Single +5V Supply
• Test Equipment and Sensors
4x4 mm SMT Package
Functional Diagram
General Description
The HMC542LP4 & HMC542LP4E are broadband
6-bit GaAs IC digital attenuators with CMOS com-
patible serial to parallel drivers in low cost lead-
less surface mount packages. This serial control
digital attenuator incorporates off chip AC ground
capacitors for near DC operation, making it suit-
able for a wide variety of RF and IF applications.
Covering DC to 3.0 GHz, the insertion loss is less
www.DataSheet4U.com
than 1.5 dB typical. The attenuator bit values are 0.5
(LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of
31.5 dB. Attenuation accuracy is excellent at ± 0.25 dB
typical step error with an IIP3 of +45 dBm. Six bit serial
control words are used to select each attenuation
state. A single Vdd bias of +5V is required.
Electrical Specifications, TA = +25° C, With Vcc = +5V
Parameter
Insertion Loss
Attenuation Range
Frequency (GHz) Min. Typ. Max. Units
DC - 1.5 GHz
1.5 - 3.0 GHz
1.2 1.5 dB
1.5 1.8 dB
DC - 3.0 GHz
31.5
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 3.0 GHz
17
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
0.5 - 3.5 dB States
4.0 - 31.5 dB States
All Attenuation States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 1.0 GHz
1.0 - 2.2 GHz
1.0 - 2.2 GHz
2.2 - 3.0 GHz
0.1 - 3.0 GHz
0.1 - 1.5 GHz
1.5 - 3.0 GHz
DC - 3.0 GHz
± (0.20 + 3% of Atten. Setting) Max.
± (0.25 + 3% of Atten. Setting) Max.
± (0.15 + 4% of Atten. Setting) Max.
± (0.30 + 3% of Atten. Setting) Max.
20
35
45
dB
dB
dB
dB
dBm
dBm
dBm
800 ns
900 ns
6 - 182
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
1 page  
HMC542LP4 / 542LP4E
v00.0306
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 3.0 GHz
6
Pin Descriptions
Pin Number
Function
1, 3, 5, 12, 14,
16-18, 23
N/C
2 Vcc
Description
These pins should be connected to PCB RF ground to
maximize performance.
Supply Voltage.
4, 15
6 - 11, 13
RF1, RF2
ACG1 - ACG7
This pin is DC coupled and matched to 50 Ohms
Blocking capacitors are required. Select value based on
lowest frequency of operation.
External capacitor to ground is required. Select value for
lowest frequency of operation. Place capacitor as close to
pins as possible.
Interface Schematic
19 Serial Output
Serial data output. Serial input data
delayed by 8 clock cycles
20 Reset
21 Shift Clock
22 Latch Enable
See truth table, control voltage table and timing diagram.
24 Serial Input
GND
Package bottom has an exposed metal paddle
that must be connected to RF/DC Ground.
6 - 186
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HMC542LP4.PDF ] | |
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