NLB-400
Pin
1
Function
RF IN
Description
Interface Schematic
RF input pin. This pin is NOT internally DC blocked. A DC blocking capacitor,
suitable for the frequency of operation, should be used in most applica-
tions. DC coupling of the input is not allowed, because this will override the
internal feedback loop and cause temperature instability.
3
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
2
3
GND
RF output and bias pin. Biasing is accomplished with an external series
RF OUT
resistor and choke inductor to V . The resistor is selected to set the DC
CC
RF OUT
current into this pin to a desired level. The resistor value is determined by
the following equation:
(VCC – VDEVICE
)
-------------------------------------------
R =
ICC
RF IN
Care should also be taken in the resistor selection to ensure that the cur-
rent into the part never exceeds maximum datasheet operating current
over the planned operating temperature. This means that a resistor
between the supply and this pin is always required, even if a supply near
5.0V is available, to provide DC feedback to prevent thermal runaway.
Because DC is present on this pin, a DC blocking capacitor, suitable for the
frequency of operation, should be used in most applications. The supply
side of the bias network should also be well bypassed.
Same as pin 2.
4
GND
Package Drawing
B
MILLIMETERS
INCHES
Min. Nom. Max. Min. Nom. Max.
0.535 REF. 0.021 REF.
D
A
B
C
D
E
F
2.39 2.54 2.69 0.094 0.100 0.106
0.436 0.510 0.586 0.017 0.020 0.023
2.19 2.34 2.49 0.086 0.092 0.098
1.91 2.16 2.41 0.075 0.085 0.095
1.32 1.52 1.72 0.052 0.060 0.068
0.10 0.15 0.20 0.004 0.006 0.008
0.535 0.660 0.785 0.021 0.026 0.031
0.05 0.10 0.15 0.002 0.004 0.006
0.65 0.75 0.85 0.025 0.029 0.033
0.85 0.95 1.05 0.033 0.037 0.041
4.53 4.68 4.83 0.178 0.184 0.190
4.73 4.88 5.03 0.186 0.192 0.198
4 M
A
G
H
J
C
N 5
1
2
3
4
5
K
L
M
N
E
NOTE: All dimensions are in millimeters, and
the dimensions in inches are for reference only.
6
H
0.08 S
F
Gauge Plane
Seating Plane
1 J
S
G
0.1
2
L 3
Kx3
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A10 DS070123
3-25
RFMD [ RF MICRO DEVICES ]
