XR1011-BD Datasheet, PDF (4/5 Pages) Mimix Broadband – 4.5-10.5 GHz GaAs MMIC Receiver

4.5-10.5 GHz GaAs MMIC
Receiver
September 2009 - Rev 11-Sep-09
R1011-BD
App Note [1] Biasing - The device is operated by biasing VD1,2,3 at 4.0V with 25, 45, 60mA respectively. Additionally, a fixed
voltage bias of -2V is required for mixer bias. It is recommended to use active bias to keep the currents constant in order to
maintain the best performance over temperature. 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 -0.3V. Make sure to sequence the applied voltage to ensure
negative gate bias is available before applying the positive drain supply.
App Note [2] Board Layout - It is recommended to provide 100pF decoupling caps as close to the bias pads as possible, with
additional 10µF decoupling caps.
Functional Schematic
LO
Pad Designation
BUF
IF1
I
IRM
Q
IF2
LNA
VG3
VD3
VG4
VD2
VG2
VD1
VG1
Pad Number
1
2
3
4
5
6
7
8
9
10
11
Pin Name Pin Function
IF2
IF2 Output
IF1
IF1 Output
LO
LO Input
VG3 Gate 3 Bias
VD3 Drain 3 Bias
VG4 Gate 4 Bias
VD2 Drain 2 Bias
VG2 Gate 2 Bias
VD1 Drain 1 Bias
VG1 Gate 1 Bias
RF
RF Input
Nominal Value
To Hybrid 90º (LSB)
To Hybrid 0º (USB)
To Hybrid 0º (LSB)
To Hybrid 90º (USB)
+5.0 dBm
-0.3V
4.0V, 60 mA
-2.0V, 2 mA
4.0V, 45 mA
-0.3V
4.0V, 25 mA
-0.3V
RF
Mechanical Dimensions
0.4175
(0.016)
2.5
(0.098)
3
1.75
(0.069)
2
2.45
4 _(0.096)
1.85
5 _(0.073)
1.55
6 (0.061)
7
1.25
(0.049)
0.95
8 _(0.037)
0.6
1
(0.024)
0.65
9 _(0.026)
0.35
10 _(0.014)
0.0
0.0
11
1.4755
(0.058)
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: [phone] Fax: [phone] mimixbroadband.com
Page 4 of 5
Characteristic Data and Specifications are subject to change without notice. ©2009 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.