MAX2045EVKIT Maxim Integrated Products, MAX2045EVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX2045EVKIT
• Description: EVAL KIT FOR MAX2045
• Manufacturer: Maxim Integrated Products
• Type: Vector Multiplierr

Specifications of MAX2045EVKIT

• Frequency: 2.04GHz ~ 2.24GHz
• For Use With/related Products: MAX2045
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Required Test Equipment
1) If available, set the current limit of the power supply
2) Turn on the DC supply; the supply current should
1) Connect a DC supply set to +3.2V to the VI1 and
2) Using a calibrated network analyzer, connect port 1
3) Configure the network analyzer to measure S21. The
4) Changing the DC supply on the VI1 and VQ1 termi-
1) Configure the evaluation kits for current mode (see
2) Connect a current source set to 4mA to the II1 and
3) Using a calibrated network analyzer, connect port 1
Power supply
Power supplies
Current sources
(optional)
Low-noise RF signal
generators
Network analyzer
Ammeter/voltmeters
50Ω SMA cables
VQ1 terminals (Figure 1).
to the RF_IN terminal (SMA J1) and port 2 to the
RF_OUT terminal (SMA J2).
analyzer should read approximately 7dB gain at f
= 2140MHz (MAX2045), 7.4dB gain at f
1900MHz (MAX2046), and 8.4dB gain at f
915MHz (MAX2047).
nals changes the magnitude of the gain. To adjust
the phase, use separate DC supplies on the VI1 and
VQ1 terminals.
the Detailed Description section).
IQ1 terminals. Leave II2, IQ2, and all voltage-control
pins open (Figure 1).
to the RF_IN terminal (SMA J1) and port 2 to the
RF_OUT terminal (SMA J2).
to 250mA. Do not turn on the supply. Connect the
DC supply set to 5V, through an ammeter, to the
VCC and GND terminals on the EV kit. Use a volt-
meter to verify that the voltage is at V
read approximately 160mA.
EQUIPMENT
MAX2045/MAX2046/MAX2047 Evaluation Kits
Testing the Gain (Single-Ended Voltage Mode)
_______________________________________________________________________________________
Testing the Gain (Current Mode)
QTY
1
2
2
2
1
2
2
Testing the Supply Current
Capable of delivering up to
250mA at 4.75V to 5.25V
Capable of swinging from 0
to +5.5V
Capable of delivering 5mA of
current
HP 8648B or equivalent
HP 8753ES or equivalent
—
—
DESCRIPTION
CC
= 5V.
IN
IN
IN
=
=
The EV kits come with all necessary components for
easy testing. For each kit, make sure all ground pins on
the 20-lead header are connected to ground. The
REFOUT voltage can be monitored from pins 17 and 18
on the 20-lead header by installing a 0Ω resistor for R6.
To operate the device in differential voltage-control
mode, remove R5 and R3, and install 0Ω resistors for
R2 and R4. Figure 1 shows the connections on the 20-
pin header corresponding to the voltage- and current-
control inputs. Using this configuration, an external DC
source can also be applied to VI2 and VQ2 for single-
ended operation using an external regulated voltage.
For current-mode operation, leave the VI and VQ (header
pins 1, 2, 5, and 6) open, and remove R3 and R5.
The bias resistor value (280Ω) was optimized during
characterization at the factory. This value should not be
adjusted. If the 280Ω (±1%) resistor is not readily avail-
able, substitute a standard 280Ω (±5%) resistor.
An on-chip, 2.5V reference voltage is provided for sin-
gle-ended control mode. REFOUT is connected,
through R3 and R5, to VI2 and VQ2 to provide a stable
reference voltage. The equivalent output resistance of
the REFOUT pin is approximately 80Ω. REFOUT is
capable of sourcing 1mA of current with <10mV drop
in voltage.
Ceramic capacitors C16 and C17 provide bypass on
the supply. Place C16 as close to the part as possible
for high-frequency bypassing. C4–C11 are bypass
capacitors for the control inputs. C1 and C14 are DC-
blocking capacitors for the on-board baluns. DC-block-
ing capacitors prevent DC current from flowing into the
transformers and can be used as part of the matching
circuit. Capacitors C13 and C15 are used to provide an
RF ground for transformer T2. Capacitor C12 is used to
bypass the 2.5V reference in case the reference is
used. As the differential RF outputs are relatively high
4) Configure the network analyzer to measure S21. The
5) Changing the current source value changes the
analyzer should read approximately 6.2dB gain at f
= 2140MHz (MAX2045), 6.6dB gain at f
1900MHz (MAX2046), and 8.1dB gain at f
915MHz (MAX2047).
magnitude of the gain. To adjust the phase, use sep-
arate current sources on the II1 and IQ1 terminals.
On-Chip Reference Voltage
Detailed Description
Bias Resistor
Capacitors
IN
IN
IN
=
=
3