11.0-19.0 GHz GaAs MMIC

Power Amplifier, QFN

Page 4 of 6

App Note [1] Biasing

biasing to keep the currents constant as the RF power and temperature vary; this gives the most reproducible results. Depending on

the supply voltage available and the power dissipation constraints, the bias circuit may be a single transistor or a low power

operational amplifier, with a low value resistor in series with the drain supply used to sense the current. The gate of the pHEMT is

controlled to maintain correct drain current and thus drain voltage. The typical gate voltage needed to do this is -0.9V. Typically the

gate is protected with Silicon diodes to limit the applied voltage. Also, make sure to sequence the applied voltage to ensure negative

gate bias is available before applying the positive drain supply.

App Note [2] Bias Arrangement -

Each DC pin (Vd and Vg) needs to have DC bypass capacitance (~0.01 uF) as close to the package as possible.

MTTF Graphs

P1020-QE

Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099

Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com

Characteristic Data and Specifications are subject to change without notice.

©2007 Mimix Broadband, Inc.

Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept

their obligation to be compliant with U.S. Export Laws.

January 2007 - Rev 26-Jan-07

XP1020-QE Vd=5.0 V, Id=380 mA

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

55

65

75

85

95

105

115

125

Baseplate Temperature (deg C)

No RF

Pout=+27 dBm

XP1020-QE Vd=5.0 V, Id=380 mA

1.00E+00

1.00E+01

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

55

65

75

85

95

105

115

125

Baseplate Temperature (deg C)

No RF

Pout=+27 dBm

XP1020-QE Vd=5.0 V, Id=380 mA

55

57

59

61

63

65

67

69

71

73

75

77

79

81

83

85

87

89

91

93

95

55

65

75

85

95

105

115

125

Baseplate Temperature (deg C)

No RF

Pout=+27 dBm

XP1020-QE Vd=5.0 V, Id=380 mA

150

175

200

225

250

275

300

55

65

75

85

95

105

115

125

Baseplate Temperature (deg C)

No RF

Pout=+27 dBm