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CHA3514
RoHS COMPLIANT
6-18GHz 4 bit Digital Variable Amplifier
GaAs Monolithic Microwave IC
Description
The CHA3514 is composed by a two stage travelling wave amplifier followed by a four steps digital attenuator. It is designed for defense applications. The backside of the chip is both RF and DC grounded. This helps to simplify the assembly process. The circuit is manufactured with a pHEMT process, 0.25m gate length, via holes through the substrate, air bridges and electron beam gate lithography. It is available in chip form.
Main Features
Performances: 6-18GHz 19dBm saturated output power 13 dB gain 4bit attenuator for 39.5dB dynamic range DC power consumption, 190mA @ 4.5V Chip size: 5.54 x 2.30 x 0.1mm Typical on wafer Measurements Gain versus attenuation states
Main Characteristics
Tamb. = 25 C Symbol
Fop G Psat ATT dyn
Parameter
Operating frequency range Small signal gain @ Attenuator state 0dB Saturated Output power @ Attenuator state 0dB Attenuator range with 4bit
Min
6
Typ
13 19 39.5
Max
18
Unit
GHz dB dBm dB
ESD Protection: Electrostatic discharge sensitive device. Observe handling precautions!
Ref. DSCHA3514-8144 - 23 May 08
1/10
Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
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
CHA3514
6-18GHz Digital Variable Amplifier
Electrical Characteristics on wafer
Tamb = +25 C Vd = Pads B, D = 4.5V, Vg = Pads A, E tuned for Id = 190mA Symbol
Fop G ATT bit
Parameter
Operating frequency range (1) Small signal gain @ Attenuator state 0dB (1) Attenuator bit: State 2.5dB State 5dB State 10 dB State 20dB
Min
6 11 2 4 9 19 35
Typ
Max
18
Unit
GHz dB
13 2.6 5 10 22 39.5 18 3.5 6 11 23
dB dB dB dB dB dBm
ATT dyn P1dB
Attenuator dynamic range with 4bit Output power at 1dB compression @ Attenuator state 0dB (1) Saturated Output power @ Attenuator state 0dB (1) Noise figure @ Attenuator state 0dB Input Return Loss all attenuator states Output Return Loss all attenuator states Drain bias DC voltage (Pads B,D) Bias current @ small signal Control voltage for Attenuator bits
Psat
19
dBm
NF RL_IN RL_OUT Vd Id Vc
7 -13 -15 4.5 190 -5 250 0 -8 -9
dB dB dB V mA V
(1) These values are representative for on-wafer measurements that are made without bonding wires at the RF ports.
Ref. : DSCHA3514-8144 - 23 May 08
2/10
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
6-18GHz Digital Variable Amplifier
CHA3514
Absolute Maximum Ratings
Tamb. = 25 (1) C Symbol
Vd Id Vg Vc Pin Tch Ta Tstg
Parameter
Maximum Drain bias voltage ( Pads B,D) Drain bias current with Vd=4.5V Gate bias voltage (Pads A, E) Attenuator bits control voltage Maximum input power overdrive (2) Maximum channel temperature Operating temperature range Storage temperature range
Values
+5 320 -2 to +0.4 -7 to +0.6 +20.0 +175 -40 to +70 -55 to +125
Unit
V mA V V dBm C C C
(1) Operation of this device above anyone of these parameters may cause permanent damage. (2) Duration < 1s.
4bit VGA Control interface
The attenuator states are controlled by 8 voltages.
Theoretical attenuation dB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 reference 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5 35 37.5 Voltage CONTROL PAD
10A (V) 10B (V) 5A (V) 5B (V) 2.5A (V) 2.5B (V) 20A (V) 20B (V)
state
-5 -5 -5 -5 0 0 0 0 -5 -5 -5 -5 0 0 0 0
0 0 0 0 -5 -5 -5 -5 0 0 0 0 -5 -5 -5 -5
-5 -5 0 0 -5 -5 0 0 -5 -5 0 0 -5 -5 0 0
0 0 -5 -5 0 0 -5 -5 0 0 -5 -5 0 0 -5 -5
-5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0
0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5
-5 -5 -5 -5 -5 -5 -5 -5 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 -5 -5 -5 -5 -5 -5 -5 -5
Ref. : DSCHA3514-8144 - 23 May 08
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
CHA3514
6-18GHz Digital Variable Amplifier
Typical chip on wafer Sij parameters for reference state
Tamb 25 B = D = 4.5V, Id = 190mA, 10A, 5A, 2.5A, 20A = -5V, 10B, 5B, 2.5B, 20B = 0V C,
Freq (GHz) 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5 24.0 dB(S11) -0.8 -1.5 -2.1 -2.8 -4.1 -5.1 -6.3 -7.8 -9.3 -10.7 -12.2 -13.8 -15.0 -15.6 -16.2 -16.6 -16.1 -15.3 -14.6 -14.0 -13.0 -12.2 -11.8 -11.5 -11.2 -11.6 -12.5 -13.1 -13.2 -14.1 -15.7 -18.0 -19.7 -16.8 -12.7 -9.9 -7.1 -5.3 -4.1 -3.3 -2.8 -2.6 -2.4 -2.2 -2.2 -2.1 -2.1 P(S11) ( ) -42.4 -62.3 -81.0 -99.6 -116.9 -133.6 -148.7 -162.3 -175.1 174.7 167.3 161.4 157.0 155.3 156.1 154.3 151.1 148.6 145.0 136.7 127.2 119.0 108.7 96.1 83.5 73.4 64.6 57.6 52.4 44.8 40.2 39.2 66.0 97.0 96.4 89.2 80.6 68.5 54.4 41.5 30.8 21.1 11.6 3.5 -3.3 -10.1 -16.9 dB(S21) -44.8 -24.1 -6.6 2.5 8.3 11.0 12.4 13.3 13.9 14.3 14.6 14.9 15.1 15.2 15.3 15.4 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.4 15.3 15.2 15.3 15.4 15.5 15.5 15.4 15.3 14.9 14.5 13.8 12.7 10.3 6.6 2.6 -0.8 -3.6 -5.8 -7.7 -9.3 -10.6 -11.9 -13.2 P(S21) ( ) -114.9 -166.4 156.9 94.4 37.6 -17.7 -65.1 -107.0 -145.1 178.9 144.5 111.4 79.3 47.9 16.9 -13.7 -44.0 -73.9 -103.8 -133.5 -163.1 167.2 137.5 107.7 77.9 49.1 20.1 -10.6 -42.1 -74.7 -108.3 -143.1 -178.3 144.9 105.1 64.1 19.1 -19.0 -47.9 -70.2 -89.1 -107.0 -125.3 -143.8 -162.9 176.9 156.5 dB(S12) -69.9 -69.2 -67.0 -61.4 -69.4 -86.1 -78.4 -72.8 -70.0 -68.7 -66.8 -64.9 -67.2 -62.7 -59.7 -57.5 -55.6 -54.7 -53.2 -54.7 -56.0 -56.4 -59.8 -76.5 -65.0 -60.2 -59.5 -55.2 -49.9 -45.5 -43.7 -42.0 -41.7 -41.5 -41.0 -42.1 -45.0 -50.6 -54.4 -53.6 -54.2 -54.2 -55.5 -58.9 -62.1 -65.9 -62.2 P(S12) ( ) -91.3 -148.8 -165.4 -179.5 74.2 97.0 133.3 112.9 77.8 34.4 -5.4 -37.6 -61.6 -85.6 -109.9 -138.0 -167.3 171.2 136.4 117.6 96.6 74.2 43.6 22.9 178.8 148.9 146.9 142.1 141.5 117.2 87.3 61.2 36.3 14.5 -13.7 -42.4 -76.5 -91.9 -69.2 -67.9 -66.0 -73.1 -89.7 -95.4 -90.4 -60.7 -32.7 dB(S22) -3.3 -4.6 -7.2 -10.5 -14.8 -17.4 -16.9 -15.5 -14.4 -13.5 -12.9 -12.4 -12.1 -12.0 -12.2 -12.7 -13.6 -15.1 -17.3 -20.4 -23.7 -24.5 -22.9 -21.9 -20.1 -17.4 -15.1 -13.5 -12.6 -12.6 -13.9 -16.6 -21.3 -22.3 -17.6 -15.1 -15.6 -20.1 -29.1 -19.5 -14.7 -12.0 -10.4 -9.4 -8.8 -8.6 -8.6 P(S22) ( ) -59.4 -89.6 -122.7 -160.5 147.5 88.8 43.1 15.9 -2.5 -17.5 -30.6 -42.3 -54.0 -66.0 -78.5 -90.1 -102.2 -113.3 -123.0 -125.3 -113.1 -88.9 -73.3 -66.9 -59.5 -59.3 -68.1 -81.7 -99.9 -121.4 -146.5 -177.9 136.0 46.6 -12.9 -51.6 -84.5 -107.2 -59.0 -18.0 -29.5 -43.1 -56.0 -69.1 -81.5 -92.4 -102.8
Ref. : DSCHA3514-8144 - 23 May 08
4/10
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
6-18GHz Digital Variable Amplifier
Typical on wafer Measurements @ 25 C
Bias conditions: Vd = 4.5V, Vg tuned for Id = 190mA
CHA3514
Linear Gain versus attenuator states
Bit 2.5dB Bit 5dB
Bit 10dB
Bit 20dB
Attenuator bit values vs frequency for main states
Ref. : DSCHA3514-8144 - 23 May 08 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
CHA3514
6-18GHz Digital Variable Amplifier
Saturated output power @ nominal state
dB(S11) versus frequency for all states
Ref. : DSCHA3514-8144 - 23 May 08
6/10
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
6-18GHz Digital Variable Amplifier
CHA3514
dB(S22) versus frequency for all states
Noise Figure vs frequency @ nominal state
Ref. : DSCHA3514-8144 - 23 May 08 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
CHA3514
6-18GHz Digital Variable Amplifier
Typical test fixture Measurements
Bias conditions: Vd=4.5V, Vg tuned for Id = 190mA
18 14 10 6 2 -2
Gain (dB)
-6 -10 -14 -18 -22 -26 -30 -34 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Frequency GHz
-40C
25 C
+70 C
Linear Gain versus attenuation states & temperature
Ref. : DSCHA3514-8144 - 23 May 08
8/10
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
6-18GHz Digital Variable Amplifier
Chip Assembly and Mechanical Data
CHA3514
A
B
120pF
10A
5A
2.5A
20A
D
120pF
E
10B
5B
2.5B
20B
10nF 100nF To Vd DC Drain Supply
Note : Supply feed should be capacitively bypassed. 25m diameter gold wire is to be prefered.
Recommended circuit bonding table Label 10A, 10B 5A, 5B 2.5A, 2.5B 20A, 20B B D A E Type Vc Vc Vc Vc Vd Vd Vg Vg Decoupling Not required Not required Not required Not required 120pF / 10nF 120pF / 10nF Not required Not required Comment 10dB pad control 5dB pad control 2.5dB pad control 20dB pad control Drain Supply Drain Supply Gate Supply Gate Supply
Ref. : DSCHA3514-8144 - 23 May 08
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
CHA3514
Bonding pad positions
6-18GHz Digital Variable Amplifier
Chip thickness: 100m
Ordering Information
Chip form : CHA3514-99F/00
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. : DSCHA3514-8144 - 23 May 08
10/10
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

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