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PDF HMC271LP4 Data sheet ( Hoja de datos )
| Número de pieza | HMC271LP4 | |
| Descripción | 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR 0.7 - 3.7 GHz | |
| Fabricantes | Hittite Microwave Corporation | |
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v03.0809
HMC271LP4 / 271LP4E
www.DataSheet4U.com
1 dB LSB GaAs MMIC 5-BIT SERIAL
CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz
5
Typical Applications
The HMC271LP4 / HMC271LP4E is ideal for:
• Cellular/3G Infrastructure
• Fixed Wireless, WiMax & WiBro
• Test Instrumentation
Features
1 dB LSB Steps to 31 dB
CMOS Compatible Serial Data Interface
SPI Compatible Serial Output
±0.4 dB Typical Bit Error
24 Lead 4x4mm QFN Package: 16mm2
Included in the HMC-DK004 Designer’s Kit
Functional Diagram
General Description
The HMC271LP4 & HMC271LP4E are broadband
5-bit positive control GaAs IC digital attenuators with
CMOS compatible serial-to-parallel drivers in low
cost leadless QFN 4x4 mm SMT packages. Covering
0.7 to 3.7 GHz, the insertion loss is typically less than
2.5 dB. The attenuator bit values are 1 (LSB), 2, 4, 8,
and 16 dB for a total attenuation of 31 dB. Accuracy
is excellent at ± 0.4 dB typical with an IIP3 of up to
+48 dBm. Five bit CMOS compatible serial control
words are used to select each attenuation state.
A single Vcc bias of +3V to +5V applied through an
external 5k Ohm resistor is required.
5 - 20
Electrical Specifications, TA = +25° C, Vcc = +3V to +5V
Parameter
Frequency
Min. Typical Max.
Insertion Loss
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
1.9 2.4
2.3 2.8
2.6 3.1
2.8 3.3
Attenuation Range
0.7 - 3.7 GHz
31
Return Loss (RF1 & RF2, All Atten. States)
0.7 - 1.4 GHz
1.4 - 2.7 GHz
2.7 - 3.7 GHz
12
15
16
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
0.7 - 0.9 GHz
0.9 - 2.2 GHz
2.2 - 3.7 GHz
± (0.4 + 5% of Atten. Setting) Max
± (0.4 + 4% of Atten. Setting) Max
± (0.4 + 5% of Atten. Setting) Max
Input Power for 0.1 dB Compression
Vcc = 5V
Vcc = 3V
0.7 - 3.7 GHz
24
22
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
Vcc = 5V
Vcc = 3V
0.7 - 3.7 GHz
48
46
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (Latch Enable to 10/90% RF)
0.7 - 3.7 GHz
750
830
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
ns
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  
v03.0809
HMC271LP4 / 271LP4E
www.DataSheet4U.com
1 dB LSB GaAs MMIC 5-BIT SERIAL
CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz
5
Pin Descriptions
Pin Number
1, 3, 4, 6, 10, 12, 13,
15, 16, 18
Function
N/C
Description
These pins should be connected to PCB RF ground to
maximize performance.
Interface Schematic
2, 17
RF1, RF2
This pin is DC coupled and matched to 50 Ohms
Blocking capacitors are required. Select value based on
lowest frequency of operation.
5 Serial Output
Serial data output. Serial input data
delayed by 8 clock cycles.
7
8
9
11
14
19 - 24
Reset
Shift Clock
Latch Enable
Serial Input
See truth table, control voltage table and timing diagram.
Vcc
GND
Supply Voltage.
Package bottom has an exposed metal paddle that must also
be connected to RF/DC Ground.
5 - 24
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 HMC271LP4.PDF ] | |
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| HMC271LP4 | 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR 0.7 - 3.7 GHz | Hittite Microwave Corporation |
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