MAX2602EVKIT Maxim Integrated Products, MAX2602EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX2602EVKIT
• Description: RF Modules & Development Tools MAX2602 EVAL KIT MAX2602 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2602EVKIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4) Connect the same power supply through a separate
5) Verify that all the connections are correct to avoid
6) Turn on the 3.6V supply. Note the supply current
7) Activate the RF signal generator and slowly
Figure 1 is the schematic for the MAX2602 EV kit as
shipped. The circuit consists of four blocks: power-sup-
ply decoupling, a bias network, and both input and out-
put matching networks. The amplifier built on this board
is biased for class AB operation at 1W of output power,
and provides high efficiency.
Capacitors C8 and C10 provide decoupling for V
collector has two separate pins: one for the V
nected through choke L2), and one for the RF output.
The most important contact for the MAX2602 is not on
the top of the board; it is the bottom-side emitter con-
tact that is connected to ground. This contact keeps
MAX2602 Evaluation Kit
Figure 1. MAX2602 EV Kit Schematic
2
_______________Detailed Description
lead to the EV kit’s V
damaging the transistor or your test equipment.
with the RF generator off. It should be around
100mA.
increase the generator’s output power to 20dBm. At
this time, the supply current should be about
500mA, and the output power should be 30dBm.
_______________________________________________________________________________________
IN
V
B
0.1 F
C9
2pF
C1
Supply Decoupling Circuitry
B
terminal.
1000pF
C5
T1
and Grounding
430
R1
1000pF
C6
100nH
12pF
C
C4
L1
input (con-
C11
1000pF
C
. The
R2
24
4
5
0
R3
emitter inductance as low as possible, as excessive
emitter inductance can degrade the performance of
any RF common-emitter amplifier. The bottom-side con-
tact is also the principal path for heat dissipation, and
must be connected to a large ground plane.
Capacitors C5, C9, and C11 provide decoupling for the
bias supply. The transistor’s bias current is set by the
internal biasing diode’s current. This current is set by
the following equation:
The collector current is scaled to the bias current:
I
is biased through R2 and L1 (a choke). For more infor-
mation on the internal biasing diode’s operation, refer to
the MAX2601/MAX2602 data sheet.
The transistor’s RF input does not present a 50Ω
impedance, so a matching network is required for prop-
er operation in a 50Ω environment. This network con-
sists of capacitor C1 to ground, approximately 1 inch
(or 2.5cm) of the 50Ω transmission line (T1), a DC-
blocking capacitor (C6), and a shunt capacitor at the
transistor base (C4).
C
= 15I
3
U1
C12
1000pF
2, 6, 7
BACK-SIDE SLUG
18.5nH
B
1
8
L2
. R3 is used as a jumper. The transistor’s base
1000pF
C7
1000pF
C8
I
B
C3
10pF
=
Input Matching Network
V - 0.75V
0.1 F
B
T2
C10
R1
C2
2pF
V
C
Biasing
OUT