HMC271LP4
/
271LP4E
v03.0809
1 dB LSB GaAs MMIC 5-BIT SERIAL
CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz
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
5
ATTENUATORS - DIGITAL - SMT
Typical Applications
The HMC271LP4 / HMC271LP4E is ideal for:
• Cellular/3G Infrastructure
• Fixed Wireless, WiMax & WiBro
• Test Instrumentation
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.
Electrical Specifi cations,
T
A
= +25° C, Vcc = +3V to +5V
Parameter
Frequency
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 3.7 GHz
0.7 - 1.4 GHz
1.4 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 0.9 GHz
0.9 - 2.2 GHz
2.2 - 3.7 GHz
Vcc = 5V
Vcc = 3V
Vcc = 5V
Vcc = 3V
0.7 - 3.7 GHz
0.7 - 3.7 GHz
Min.
Typical
1.9
2.3
2.6
2.8
31
12
15
16
± (0.4 + 5% of Atten. Setting) Max
± (0.4 + 4% of Atten. Setting) Max
± (0.4 + 5% of Atten. Setting) Max
24
22
48
46
Max.
2.4
2.8
3.1
3.3
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
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 (Latch Enable to 10/90% RF)
0.7 - 3.7 GHz
750
830
ns
ns
5 - 20
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
HITTITE [ HITTITE MICROWAVE CORPORATION ]
