MAX2620_1 Datasheet, PDF (1/4 Pages) Maxim Integrated Products – Evaluation Kit

19-1248; Rev 1; 5/98
MAX2620 Evaluation Kit
________________General Description
The MAX2620 evaluation kit (EV kit) simplifies evalua-
tion of the MAX2620 integrated oscillator with buffered
outputs. It includes a varactor-based tank circuit that
allows the VCO to tune across an approximately 30MHz
band in the 900MHz frequency range. Outputs utilize
50Ω SMA connectors. The EV kit has a test port that
facilitates complete characterization of the MAX2620
tank port, enabling resonators to be designed for fre-
quency ranges other than that supplied with the EV kit.
____________________Component List
DESIGNATION QTY
DESCRIPTION
C1, C7–C10,
C12
6
1000pF, 10% ceramic capacitors
C2, C11, C14 0 Not installed
C3
1 2.7pF, 10% ceramic capacitor
C4, C6
2 1pF, 10% ceramic capacitors
C5, C13, C17 3 1.5pF, 10% ceramic capacitors
C15
1
10µF, ±10%, 25V tantalum capacitor
Sprague 293D106X9025D2
D1
1
Varactor diode
Alpha Industries SMV1204-34
JU1, V_CC,
GND
3 2-pin headers
L1
1
Ceramic coaxial resonator
Trans-Tech SR8800LPQ1357BY
L4
0 Not installed
L3
1
10nH inductor
Coilcraft 0603HS-10NTJBC
OUT, OUT,
TEST PORT
3 SMA connectors (edge mount)
R1, R3
R2
R4
R5
SHDN
U1
VCONT
None
None
None
2 10Ω, 5% resistors
1 1kΩ, 5% resistor
0 Not installed
1 51Ω, 5% resistor
1 3-pin header
1 MAX2620EUA
1 SMA connector (PC mount)
1 Shunt
1 MAX2620 circuit board
1 MAX2620 data sheet
NOTE: All capacitors and resistors are size 0805 unless other-
wise noted.
____________________________Features
o Complete, Tunable VCO Test Board with Tank
Circuit
o Tuning in 900MHz Frequency Range
o Low Phase Noise (-110dBc/Hz typical at 25kHz
offset from carrier)
o Operates from Single +2.7V to +5.25V Supply
o Two Output Buffers with 50Ω SMA Connectors
o Low-Power Shutdown Mode
o Test Port for Oscillator Tank Port Characterization
o Fully Assembled and Tested
______________Ordering Information
PART
MAX2620EVKIT
TEMP. RANGE
-40°C to +85°C
BOARD TYPE
Surface Mount
______________Component Suppliers
SUPPLIER
Alpha Industries
Coilcraft
Sprague
Trans-Tech
PHONE
[phone]
[phone]
[phone]
[phone]
FAX
[phone]
[phone]
[phone]
[phone]
_________________________Quick Start
The MAX2620 EV kit is fully assembled and factory test-
ed. Follow the instructions in the Connections and
Setup section.
__________Test Equipment Required
• Power supplies. Low-noise power supplies are rec-
ommended for oscillator-noise measurements. This
is especially important for the tuning voltage sup-
plied to the varactor (VCONT). Noise or ripple on
the tuning voltage frequency-modulates the oscilla-
tor and causes spectral spreading. Batteries can be
used in place of power supplies, if necessary.
—DC supply capable of supplying +2.7V to +5.25V
at 20mA. Alternatively, use two or three 1.5V AA
batteries.
—DC supply capable of supplying 0V to +3V, con-
tinuously variable, for VCONT. Alternatively, use
two or three 1.5V batteries with a resistive volt-
age divider or potentiometer.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.