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PDF HMC542BLP4E Data sheet ( Hoja de datos )
| Número de pieza | HMC542BLP4E | |
| Descripción | 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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HMC542BLP4E
v00.1212
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 4 GHz
Typical Applications
The HMC542BLP4E is ideal for:
• Cellular/PCS/3G Infrastructure
• ISM, MMDS, WLAN, WiMAX, & WiBro
• Microwave Radio & VSAT
• Test Equipment and Sensors
Functional Diagram
Features
0.5 dB LSB Steps to 31.5 dB
TTL/CMOS Compatible Serial Data Interface
SPI Compatible Serial Output
± 0.25 dB Typical Step Error
Single +5V Supply
24 Lead 4x4 mm QFN Package: 16 mm²
General Description
The HMC542BLP4E is a broadband 6-bit GaAs IC
digital attenuator with a CMOS compatible serial
to parallel driver in low cost leadless surface mount
package. This serial control digital attenuator incorp
rates off chip AC ground capacitors for near DC opera-
tion, making it suitable for a wide variety of RF and
IF applications. Covering DC to 4 GHz, the inser-
tion loss is 1.7 dB and the attenuator bit values are
0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenua-
tion of 31.5 dB. Attenuation accuracy is excellent at
±0.25 dB typical step error with an IIP3 of +50 dBm.
Six bit serial control words are used to select each
attenuation state. A single Vcc bias of +5V is required.
Electrical Specifications, TA = +25° C, with Vcc = +5V
Parameter
Insertion Loss
Attenuation Range
Frequency (GHz)
DC - 1.5 GHz
1.5 - 3.0 GHz
3.0 - 4.0 GHz
DC - 4.0 GHz
Return Loss (RF1 & RF2, All Atten. States)
DC - 4.0 GHz
Min.
Typ.
1.4
1.7
1.9
31.5
19
Max.
1.5
1.8
2.3
Units
dB
dB
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
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 - 4.0 GHz
± (0.20 + 3% of Atten. Setting) Max
± (0.20 + 2.5% of Atten. Setting) Max
dB
dB
0.1 - 4.0 GHz
0.1 - 4.0 GHz
30
50
dBm
dBm
DC - 4.0 GHz
60
100
ns
ns
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1 page  
HMC542BLP4E
v00.1212
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 4 GHz
Serial Input Truth Table
Latch
Enable
X
X
Shift
Clock
X
á
áX
Reset
L
H
H
Function
Shift register cleared
Shift register clocked
Contents of shift register
transferred to Digital
Attenuator
Digital Control Voltages
State
Low
High
Vcc = +5V
0 to 1.3V
3 to 5V
Timing
Parameter
Symbol
Serial Input Setup Time
Hold time from Serial
Input to Shift Clock
Setup time from Shift
Clock to Latch Enable
Latch Enable Window,
Latch Enable to C0.5
through C8
Setup time from Reset to
Shift Clock
Clock Frequency
(1/tclk)
ts
th
tlsup
tpd
-
fclk
Vcc = +5V
Min. Max.
20 -
0-
40 -
- 30
20 -
- 30
Units
ns
ns
ns
ns
ns
MHz
Timing Diagram
Truth Table
Control Voltage Input
Attenuation
State
C16 C8 C4 C2 C1 C0.5 RF1 - RF2
High
High
High
High
High
High
Reference
I.L.
High High High High High Low
0.5 dB
High High High High Low High
1 dB
High High High Low High High
2 dB
High High Low High High High
4 dB
High Low High High High High
8 dB
Low High High High High High
16 dB
Low Low Low Low Low Low
31.5 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
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4
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HMC542BLP4E.PDF ] | |
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