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CHA3694-QDG
RoHS COMPLIANT
31-40GHz Variable Gain Amplifier
GaAs Monolithic Microwave IC in SMD package Description
The CHA3694-QDG is a variable gain broadband three-stage monolithic amplifier. It is designed for a wide range of applications, typically commercial communication systems. The circuit is manufactured with a Power pHEMT process, 0.15m gate length, via holes through the substrate and air bridges. It is available in lead-free SMD package.
Vd RFin
...
RFout
Vctrl
Vg
On board measurements
22 18
Main Features
Linear Gain (dB)
14 10 6 2 -2 -6 -10 -14 -18 30 31 32 33 34 35 36 37 38 39 40 41 42 43
Broadband performance 31-40GHz 18dB gain 25dBm output IP3 19dB gain control range 24LQFN4x4 ESD protected (see page 9)
Frequency (GHz)
Main Characteristics
Tamb. = +25 Vd = +3.5V C, Symbol Fop G Gc OIP3 Parameter Operating frequency range Small signal gain Gain control range 3 order output intercept point @ max. gain
rd
Min 31
Typ
Max 40
Unit GHz dB dB dBm
18 19 25
ESD Protection: Electrostatic discharge sensitive device. Observe handling precautions!
Ref. : DSCHA3694-QDG7234 - 22 Aug 07
1/10
Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
Route Departementale 128 - BP46 - 91401 Orsay Cedex France Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694-QDG
Electrical Characteristics
Tamb. = +25 C Symbol Fop G Parameter Operating frequency range
31-40GHz Variable Gain Amplifier
Min 31
Typ
Max 40
Unit GHz dB dB dB dB dB dB dB dB dBm dBm dB dB V mA mA V
Nominal gain @ max. gain (Vctrl=-1.5V) (31-34GHz) Nominal gain @ max. gain (Vctrl=-1.5V) (34-40GHz)
15 18 10 8 -4 -7 -7 -5 25 17 25 19 3.5 160 180 -1 -1.5 +0.6
NF
Noise figure @ nominal gain (31-34GHz) Noise figure @ nominal gain (37-40GHz)
RLin
Input Return loss (any attenuation) (31-34GHz) Input Return loss (any attenuation) (37-40GHz)
RLout
Output Return loss (any attenuation) (31-34GHz) Output Return loss (any attenuation) (37-40GHz)
OIP3 P1dB
3rd order output intercept point @ nominal gain Output power at 1dB gain compression @ nominal gain Gain control range (31-34GHz) Gain control range (37-40GHz)
Gc
Vd Id Id P1dB Vg Vctrl
Drain bias voltage Drain bias current (*) Drain current at 1dB gain compression Gate bias voltage Variable gain control voltage
V
(*) Id not affected by Vctrl.
These values are representative of on board measurements as defined on the drawing 96270 (see page 10).
Ref.: DSCHA3694-QDG7234 - 22 Aug 07
2/10
Specifications subject to change without notice
Route Departementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
Absolute Maximum Ratings (1)
Tamb. = +25 C Symbol
Vd Id Vg Vctrl Pin Tch Ta Tstg
CHA3694-QDG
Parameter
Maximum drain bias voltage Maximum quiescent bias current Gate bias voltage Variable gain control voltage Maximum RF input power overdrive @ 3.5V Maximum channel temperature (2) Operating temperature range Storage temperature range
Values
4 200 -2.0 to +0.4 -2.0 to +1.0 5 175 -40 to +85 -55 to +125
Unit
V mA V V dBm C C C
(1) Operation of this device above anyone of these paramaters may cause permanent damage.
(2) Thermal Resistance channel to ground paddle =156.6 C/W for Tamb. = +85 Vd= +3.5V & Id= C, 160mA.
Ref. : DSCHA3694-QDG7234 - 22 Aug 07
3/10
Specifications subject to change without notice
Route Departementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
CHA3694-QDG
Tamb. = +25 Vd = +3.5V, Id = 160mA C,
Freq (GHz) 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0 20,0 21,0 22,0 23,0 24,0 25,0 26,0 27,0 28,0 29,0 30,0 31,0 31,5 32,0 32,5 33,0 33,5 34,0 34,5 35,0 35,5 36,0 36,5 37,0 37,5 38,0 38,5 39,0 39,5 40,0 41,0 42,0 43,0 44,0 45,0 46,0 47,0 48,0 49,0 50,0 dB(S11) -0,4 -0,4 -0,5 -0,6 -2,3 -1,1 -0,8 -0,9 -1,0 -1,1 -1,3 -1,7 -2,2 -3,2 -5,5 -11,0 -21,5 -10,8 -7,1 -5,6 -4,9 -4,8 -5,0 -5,2 -5,3 -5,2 -5,3 -5,4 -5,7 -5,3 -4,7 -4,3 -4,3 -4,1 -3,8 -3,5 -3,5 -3,5 -3,8 -4,5 -5,4 -6,7 -8,3 -10,4 -13,5 -15,6 -17,3 -17,8 -17,6 -18,1 -7,3 -4,8 -3,0 -2,8 -2,8 -3,5 -5,1 -11,5 Ph(S11) ( ) 144 127 109 89 67 64 42 22 2 -19 -41 -64 -88 -115 -144 -172 -112 -93 -115 -137 -157 -174 170 157 146 135 123 112 103 95 89 82 75 70 61 53 42 31 20 7 -5 -15 -27 -39 -45 -47 -41 -34 -81 -110 -167 139 102 78 54 32 11 5 dB(S12) -51,6 -49,2 -48,4 -49,8 -52,4 -53,0 -52,8 -53,7 -55,0 -57,2 -59,1 -62,0 -65,5 -56,7 -52,8 -52,0 -50,2 -50,3 -47,9 -48,8 -52,7 -54,3 -48,9 -47,1 -46,0 -43,5 -43,8 -42,6 -41,4 -41,0 -45,1 -53,4 -57,5 -45,2 -43,5 -42,4 -42,6 -41,2 -39,5 -37,5 -37,4 -38,5 -39,1 -39,0 -40,1 -40,9 -41,0 -38,5 -34,4 -30,5 -29,1 -35,2 -43,2 -46,5 -38,7 -34,0 -30,6 -28,5
31-40GHz Variable Gain Amplifier
Typical Package Sij parameters for Vctrl= -1.5V
Ph(S12) ( ) -41 -58 -104 -137 -169 167 130 93 54 27 -28 -55 -168 -168 121 77 71 62 41 14 2 21 20 32 2 -6 -19 -34 -59 -86 -127 -150 49 -30 -20 -52 -54 -60 -61 -76 -82 -88 -104 -95 -100 -106 -111 -94 -109 -133 173 121 73 160 -131 -174 140 83
dB(S2 1) -54,8 -48,2 -45,3 -46,0 -42,3 -38,2 -32,5 -24,8 -17,7 -12,7 -9,4 -6,9 -5,0 -3,5 -2,1 -1,0 -0,2 0,7 2,1 4,1 6,4 8,5 10,0 10,8 11,3 11,6 12,1 12,7 13,5 14,3 14,7 15,0 15,4 16,0 16,5 17,0 17,6 18,1 18,5 18,6 18,7 18,8 18,7 18,5 18,4 18,2 17,7 17,3 16,8 17,1 15,0 -0,4 -18,9 -39,6 -36,8 -30,0 -27,4 -27,5
Ph(S21) ( ) -83 -25 -90 -147 103 -52 -99 -146 152 85 20 -43 -102 -159 147 93 42 -5 -49 -96 -146 159 101 43 -13 -65 -117 -169 137 84 56 28 1 -27 -56 -86 -116 -148 179 145 112 78 44 9 -26 -63 -100 -137 147 56 -82 146 80 36 -111 -174 140 84
dB(S22) -4,7 -6,5 -1,1 -1,2 -2,5 -3,7 -4,8 -6,5 -8,2 -7,6 -6,3 -5,3 -4,4 -3,7 -3,2 -2,9 -2,9 -3,1 -3,6 -4,5 -6,1 -8,3 -10,9 -12,4 -11,5 -10,4 -9,2 -8,0 -7,0 -6,9 -6,9 -7,4 -8,4 -9,2 -10,8 -12,7 -16,0 -17,0 -13,2 -10,5 -8,7 -7,2 -6,3 -6,0 -5,7 -5,4 -5,5 -5,4 -7,5 -10,9 -11,9 -7,9 -3,2 -2,4 -1,8 -1,7 -1,5 -2,4
Ph(S22) ( ) 122 147 119 85 60 40 20 3 -5 -11 -27 -48 -69 -91 -112 -133 -153 -174 164 138 109 71 24 -32 -82 -122 -155 175 145 114 101 85 74 65 56 50 60 94 106 100 95 89 81 70 63 56 45 34 1 -67 161 170 134 110 95 81 62 38
Refer to the "definition of the Sij reference planes" section below.
Ref.: DSCHA3694-QDG7234 - 22 Aug 07
4/10
Specifications subject to change without notice
Route Departementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
Typical Measured Performance
Tamb. = +25 Vd = +3.5V, Vg tuned for Id = 160mA C,
CHA3694-QDG
Measurements in the package access planes, using the proposed land pattern & board 96270, as defined page 10.
Linear Gain versus Frequency
22 18
Vctrl=-1.5V
14 Linear Gain (dB) 10 6 2 -2 -6 -10 -14 -18 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Frequency (GHz)
Vctrl=-0.7V Vctrl=-0.6V Vctrl=-0.5V Vctrl=-0.4V Vctrl=-0.3V Vctrl=+0.6V
Linear Gain versus Gain Control Voltage
22 18 14 Linear Gain (dB) 10 6 2 -2 -6 -10 -14 -18 -1,6
Freq=40GHz
Freq=31GHz
-1,4 -1,2 -1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6
Gain Control Voltage (V)
Ref. : DSCHA3694-QDG7234 - 22 Aug 07 5/10 Specifications subject to change without notice
Route Departementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
CHA3694-QDG
31-40GHz Variable Gain Amplifier
Gain Control Range versus Frequency
36 32 Gain Control Range (dB) 28 24 20 16 12 8 4 0 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Frequency (GHz)
Return Losses versus Frequency and Gain Control Voltage
0 -2 -4 Return Losses (dB) -6 -8 -10 -12 -14 -16 -18 -20 -22 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Frequency (GHz)
S22 (dB)
S11 (dB)
Ref.: DSCHA3694-QDG7234 - 22 Aug 07
6/10
Specifications subject to change without notice
Route Departementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
CHA3694-QDG
Measurements in the connector access planes (losses not deembeded), using the proposed land pattern & board 96270, as defined page 10. Output IP3 versus Dual Carrier Output Power for Nominal Gain @ 25C
37 33 29 25 21 17 13 9 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 Dual carrier output power (dBm)
Output IP3 (dBm)
Freq=31GHz Freq=34GHz Freq=37GHz Freq=40GHz
Output IP3 versus Dual Carrier Output Power for Nominal Gain @ 40GHz
37 33 29 25 21 17 13 9 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 Dual carrier output power (dBm)
Output IP3 (dBm)
Temp= -40C Temp=+25C Temp=+75C
Ref. : DSCHA3694-QDG7234 - 22 Aug 07
7/10
Specifications subject to change without notice
Route Departementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
CHA3694-QDG
Package outline:
31-40GHz Variable Gain Amplifier
Ref.: DSCHA3694-QDG7234 - 22 Aug 07
8/10
Specifications subject to change without notice
Route Departementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
CHA3694-QDG
Definition of the Sij reference planes
The reference planes are defined from the footprint of the recommended characterization board 96270 shown beside. The reference is the symmetrical axis of the package. The input and output reference planes are located at 3.18mm offset (input wise and output wise respectively) from this axis. Then, the given Sij incorporates this land pattern.
3.1 8
3.1 8
SMD mounting procedure
The SMD leadless package has been designed for high volume surface mount PCB assembly process. The dimensions and footprint required for the PCB (motherboard) are given in the drawings above. For the mounting process standard techniques involving solder paste and a suitable reflow process can be used. For further details, see application note AN0017.
Note
Due to ESD protection circuits on RF input and output, an external capacitance might be requested to isolate the product from external voltage that could be present on the RF accesses.
Vd
RFin
RFout
...
Vg Vctrl
ESD protections are also implemented on gate and control accesses. The DC connections do not include any decoupling capacitor in package, therefore it is mandatory to provide a good external DC decoupling (10nF) on the PC board, as close as possible to the package.
Ref. : DSCHA3694-QDG7234 - 22 Aug 07
9/10
Specifications subject to change without notice
Route Departementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
CHA3694-QDG
31-40GHz Variable Gain Amplifier
Proposed Assembly board "96270" for the 24L-QFN4x4 products characterization.
Compatible with the proposed footprint. Based on typically Ro4003 / 8mils or equivalent. Using a microstrip to coplanar transition to access the package. Recommended for the implementation of this product on a module board.
-
Ordering Information
QFN 4x4 RoHS compliant package: CHA3694-QDG/XY Stick: XY = 20 Tape & reel: XY = 21
Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors S.A.S. assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use as critical components in life support devices or systems without express written approval from United Monolithic Semiconductors S.A.S.
Ref.: DSCHA3694-QDG7234 - 22 Aug 07
10/10
Specifications subject to change without notice
Route Departementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09

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