GaAs MMIC DIGITAL ATTENUATOR Features WIDE BANDWIDTH: ATTENU
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HMC235QS16G
GaAs MMIC DIGITAL ATTENUATOR
Features
WIDE BANDWIDTH: ATTENUATION BITS: MINIATURE QSOP-16 PACKAGE
General Description
HMC235QS16G broadband 5-bit digital attenuator lead (narrow pitch) surface mount QSOP plastic package with exposed ground slug. This package occupies same area lead SOIC package. bits have less than degrees relative phase shift. five primary attenuation states activated independently, collectively attenuation levels HMC235QS16G ideal cellular, PCS, WLL, LMDS applications.This smallest digital attenuator available.
Min. Typ. 14.0 26.0 14.0 25.0 17.9 35.0 17.9 35.0 Max. Units
ATTENUATORS
Guaranteed Performance With 0/-5V Control,
Parameter Insertion Loss Attenuation Range Input Return Loss (All States) Output Return Loss (All States) Attenuation Accuracy: Bits Attenuation Accuracy: Bits Switching Characteristics tRISE, tFALL (10/90%) tON, tOFF (50% 10/90% Input Power Compression Frequency
0.05 Min. Atten. State 0.05 Atten. States Min. Atten. State Atten. States 0.05 Min. Atten. State 0.05 Atten. States Min. Atten. State Atten. States
Input Third Order Intercept Point each tone +5dBm typ.
Elizabeth Drive, Chelmsford, 01824
Phone: 978-250-3343
Fax: 978-250-3373
Site: www.hittite.com
HMC235QS16G
HMC235QS16G DIGITAL ATTENUATOR
Insertion Loss
INSERTION LOSS (dB) FREQUENCY (GHz)
Relative Attenuation
RELATIVE ATTENUATION (dB) FREQUENCY (GHz)
ATTENUATORS
Input Output Return Loss (Reference State)
Relative Phase
OUTPUT RETURN LOSS (dB)
INPUT RETURN LOSS PHASE (DEGREES)
OUTPUT RETURN LOSS
FREQUENCY (GHz)
FREQUENCY (GHz)
Input Return Loss
INPUT RETURN LOSS (dB)
Output Return Loss
OUTPUT RETURN LOSS (dB)
REF. STATE
REF. STATE
FREQUENCY (GHz)
FREQUENCY (GHz)
Elizabeth Drive, Chelmsford, 01824
Phone: 978-250-3343
Fax: 978-250-3373
Site: www.hittite.com
HMC235QS16G
HMC235QS16G DIGITAL ATTENUATOR
Input Power Compression (Minimum Attenuation)
Input Power Compression (Maximum Attenuation)
ATTENUATORS
COMPRESSION (dBm)
COMPRESSION (dBm)
+25OC +85OC
+85OC +25OC
FREQUENCY (GHz)
FREQUENCY (GHz)
(Minimum Attenuation)
+85OC +25OC
(Maximum Attenuation)
+85OC +25OC
(dBm)
FREQUENCY (GHz)
(dBm)
FREQUENCY (GHz)
Elizabeth Drive, Chelmsford, 01824
Phone: 978-250-3343
Fax: 978-250-3373
Site: www.hittite.com
HMC235QS16G
HMC235QS16G DIGITAL ATTENUATOR
Schematic
(16) (15) (14) (13) (12) (11) (10)
ATTENUATORS
16dB
16dB
HMC235
Pins GND.
Absolute Maximum Ratings
Control Voltage Range Storage Temperature Operating Temperature Input Power (0.5 GHz) Insertion Loss State Attenuation State +0.5 -8.5 +150
Truth Table
Control Input 16dB
Control Voltages
State High Bias Condition -0.2V@20uA -3V@50uA -8V@500uA
combination above states will provide attenuation approximately equal bits selected.
Elizabeth Drive, Chelmsford, 01824
Phone: 978-250-3343
Fax: 978-250-3373
Site: www.hittite.com
HMC235QS16G
HMC235QS16G DIGITAL ATTENUATOR
Outline
0.189/0.197 (4.80/5.00) EXPOSED GROUND SLUG (CONNECT GROUND PLANE)
DATE CODE YEAR
ATTENUATORS
0.150/0.157 (3.81/3.99)
HMC235 YYWW ZZZZ
WEEK 0.228/0.224 (5.76/6.20) NUMBER 0.037 0.015 (0.94 0.38) 0.080 (2.03)
0.105 (2.67) 0.044 0.015 (1.12 0.38)
0.051/0.059 (1.30 1.50) 0.0256 (.65) 0.010 (0.025) 0.000/0.004 (0.00/0.10)
0.004 0.010 (0.1 0.25) 0.016 (0.41)
MATERIAL: PACKAGE BODY STRESS INJECTION-MOLDED PLASTIC. LEADFRAME SLUG MATERIAL: COPPER ALLOY PLATING LEAD SOLDER PLATE (LEAD SLUG) DIMENSIONS INCHES (MILLIMETERS). UNLESS OTHERWISE SPECIFIED TOL. ±0.005(±0.13).
DIMENSION DOES INCLUDE MOLDFLASH 0.15 SIDE DIMENSION DOES INCLUDE MOLDFLASH 0.25 SIDE
Suggested Driver Circuit
Vz=5.1V Izt=50uA COMPENSATED DEVICES CD4689 CMOS 74HCT04 (TTL) 74HC04 (CMOS) 100* 100pF
GaAs ATTENUATOR CONTROL
100pF*
Simple driver using inexpensive standard logic provides fast switching using minimum current. Recommended values suppress unwanted signals Ax/Bx control lines. Component values adjusted switching speed considerations. Elizabeth Drive, Chelmsford, 01824 Phone: 978-250-3343 Fax: 978-250-3373 Site: www.hittite.com
HMC235QS16G
HMC235QS16G DIGITAL ATTENUATOR
Evaluation Circuit Board
ATTENUATORS
circuit board used final application should circuit design techniques. Signal lines should have impedance while package ground leads should connected directly ground plane similar that shown above. sufficient number holes should used connect bottom ground planes. evaluation circuit board shown available from Hittite upon request.
Evaluation Circuit Board Layout Design Details
Layout Technique Material Dielectric Thickness Line Width Ground Edge Ground Hole Diameter Connectors Grounded Co-Planar Waveguide (GCPW) Rogers 4350 0.020" (0.51 0.034" (0.86 0.010" (0.25 0.014" (0.36 SMA-F Johnson 142-0701-806)
Elizabeth Drive, Chelmsford, 01824
Phone: 978-250-3343
Fax: 978-250-3373
Site: www.hittite.com
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