HMC542ALP4 Datasheet, PDF (1/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz

HMC542ALP4 / 542ALP4E
v05.0311
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 4 GHz
8
Typical Applications
The HMC542ALP4(E) is ideal for:
• Cellular/PCS/3G Infrastructure
• ISM, MMDS, WLAN, WiMAX, & WiBro
• Microwave Radio & VSAT
• Test Equipment and Sensors
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 4x4mm QFN Package: 16mm²
Functional Diagram
General Description
The HMC542ALP4(E) 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 1.5 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 +45 dBm.
Six bit serial control words are used to select each
attenuation state. A single Vdd bias of +5V is required.
Electrical Specifications, T_A = +25° C, with Vcc = +5V
Parameter
Insertion Loss
Attenuation Range
Frequency (GHz) Min.
Typ.
DC - 1.5 GHz
1.2
1.5 - 3.0 GHz
1.5
3.0 - 4.0 GHz
1.8
DC - 4.0 GHz
31.5
Max.
1.5
1.8
2.3
Units
dB
dB
dB
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 4.0 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
0.5 - 3.5 dB States
4.0 - 31.5 dB 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
3.0 - 4.0 GHz
3.0 - 4.0 GHz
0.1 - 4.0 GHz
0.1 - 1.5 GHz
1.5 - 4.0 GHz
DC - 4.0 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
± (0.15 + 5% of Atten. Setting) Max
± (0.50 + 5% of Atten. Setting) Max.
20
35
45
dB
dB
dB
dB
dB
dBm
dBm
dBm
800
ns
900
ns
8-1
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]