MAX2681EVKIT ,Evaluation Kits for the MAX2680/MAX2681/MAX2682FeaturesThe MAX2680/MAX2681/MAX2682 evaluation kits (EV♦ Easy Evaluation of MAX2680/MAX2681/MAX2682 ..
MAX2682EUT ,PLASTIC ENCAPSULATED DEVICESTable of Contents I. ........Device Description V. ........Quality Assurance Information II ..
MAX2682EUT ,PLASTIC ENCAPSULATED DEVICESTable of Contents I. ........Device Description V. ........Quality Assurance Information II ..
MAX2682EUT ,PLASTIC ENCAPSULATED DEVICES MAX2682EUT Rev. A RELIABILITY REPORT FOR MAX2682EUT PLASTIC ENC ..
MAX2682EUT+ ,400MHz to 2.5GHz, Low-Noise, SiGe Downconverter MixersEVALUATION KIT AVAILABLEMAX2680/MAX2681/ 400MHz to 2.5GHz, Low-Noise,MAX2682 SiGe Downconverter Mix ..
MAX2682EUT+T ,400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixersfeatures a low-power shutdown mode in which it typically draws less than 0.1μA of supply current. C ..
MAX6033BAUT25#TG16 ,Ultra-High-Precision SOT23 Series Voltage ReferenceELECTRICAL CHARACTERISTICS—V = 3.000VOUT (V = 5V, C = 0.1µF, I = 0A, T = T to T , unless otherwise ..
MAX6034AEXR25+T ,Precision, Micropower, Low-Dropout, SC70 Series Voltage ReferenceApplicationsMAX6034AEXR41-T -40°C to +85°C 3 SC70-3 AJLHand-Held EquipmentMAX6034BEXR41-T -40°C to ..
MAX6034BEXR25+ ,Precision, Micropower, Low-Dropout, SC70 Series Voltage ReferenceFeaturesThe MAX6034 family of precision, low-dropout, microp-♦ Ultra-Small, 3-Pin SC70 Packageower ..
MAX6035AAUR50+ ,High-Supply-Voltage, Precision Voltage Reference in SOT23features a proprietary 10mA Source Current, 2mA Sink Currenttemperature coefficient curvature-corr ..
MAX6035AAUR50+T ,High-Supply-Voltage, Precision Voltage Reference in SOT23ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V)(V = 5V, I = 0, T = T to T , unless otherwise noted. ..
MAX6035BAUR25+ ,High-Supply-Voltage, Precision Voltage Reference in SOT23Applications PART VOLTAGE(ppm/°C) ACCURACY(V)4mA to 20mA Industrial Digital Multimeters (-40°C to + ..
MAX2681EVKIT
Evaluation Kits for the MAX2680/MAX2681/MAX2682
General DescriptionThe MAX2680/MAX2681/MAX2682 evaluation kits (EV
kits) simplify the evaluation of the MAX2680/
MAX2681/MAX2682 downconverter mixers. They
enable testing of all device functions and require no
additional support circuitry. Signal inputs and outputs
use SMA connectors to ease the connection of RF test
equipment.
All three EV kits share the same PC board but have RF
input matching components optimized for each device
at an RF frequency of 900MHz. Be sure to select the EV
kit for the device that meets your performance needs.
Consult the Selector Guidein the MAX2680/
MAX2681/MAX2682 data sheet for the various combi-
nations of power gain, input IP3, noise figure, and sup-
ply current offered by each device. The IF output
matching components are optimized for an IF frequen-
cy of 70MHz. All matching components may be
changed to match RF frequencies from 400MHz to
2.5GHz and IF frequencies from 10MHz to 500MHz.
Consult Tables 2 and 4 in the MAX2680/MAX2681/
MAX2682 data sheet for component values appropriate
for each device at other RF and IF operating frequen-
cies.
FeaturesEasy Evaluation of MAX2680/MAX2681/MAX2682Easy Evaluation of All Device Functions+2.7V to +5.5V Single-Supply OperationRF Input Matched to 50Ωat 900MHzIF Output Matched to 50Ωat 70MHzSMA Input and Output Signal ConnectorsAll Critical Peripheral Components IncludedAX2680/MAX2681/MAX2682 Evaluation Kits19-4786; Rev 1; 11/98
SUPPLIERPHONEFAXAVX803-946-0690803-626-3123
Components Common o All Three EV KitsCoilcraft847-639-6400847-639-1469
Toko America708-297-0070708-699-1194
PART
MAX2680EVKIT
MAX2681EVKIT-40°C to +85°C
-40°C to +85°C
TEMP.
RANGEIC PACKAGE6 SOT23-6
6 SOT23-6
DESIGNATION15pF ceramic capacitor (0603)1C2
270pF ceramic capacitor (0603)1C1
DESCRIPTIONQTY
MAX2682EVKIT-40°C to +85°C6 SOT23-6
SOT
TOP MARKAAAR
AAAS
AAAT
Component Suppliers
Ordering InformationC3, C4, C631000pF ceramic capacitors (0603)110μF, 10V tantalum capacitor (0805)
C7, C82Open1330nH inductor
Coilcraft 1008HS-330TJBC0Open0Not installed, short
IF, LO, RF3SMA connectors (edge mount)
JU113-pin header
GND, VCC,
SHDN3Eyelets
None1MAX2680/MAX2681/MAX2682 PC board0Open1MAX2680EUT-T (6-pin SOT23)
DESIGNATION22nH inductor
Toko LL1608-FH22NJ1Z2
270pF ceramic capacitor (0603)1Z1
DESCRIPTIONQTY
MAX2680 EV Kit
Additional Components
AX2680/MAX2681/MAX2682 Evaluation KitsQuick StartThe MAX2680/MAX2681/MAX2682 EV kits are fully
assembled and factory tested. Follow the instructions in
the Connections and Setupsection for proper device
evaluation.
Test Equipment RequiredThis section lists the recommended test equipment to
verify the operation of the MAX2680/MAX2681/
MAX2682. It is intended as a guide only, and some
substitutions are possible. DC power supply capable of supplying a minimum
of 50mA at +2.7V to +5.5V HP8561E spectrum analyzer or equivalent high-
sensitivity spectrum analyzer Digital multimeter (DMM) to monitor DC supply volt-
age and supply current (if desired) Two HP8648C RF signal generators or equivalent
(50Ω) sine-wave sources for the RF and LO inputs Three 50ΩSMA cables (RG-58A/U or equivalent)
Connections and SetupVerify the DC power supply is set to less than +5.5V
and is off before connecting the supply to the EV
kit. A good starting point is +3.0V. Connect the
power supply between VCCand GND, and turn the
power supply on.Verify the jumper JU1 is in the “on” position, pin 1
shorted to pin 2 (SHDN= VCC). Use a 50ΩSMA cable to connect a signal genera-
tor to the SMA RF connector of the EV kit. Set the
signal generator’s output frequency to 900MHz and
output power level to -25dBm.Use another 50ΩSMA cable to connect a second
signal generator to the SMA LO connector of the EV
kit. Set the second signal generator’s output fre-
quency to 970MHz and output power level to
-5dBm.Use a third 50ΩSMA cable to connect the IF con-
nector of the EV kit to the spectrum analyzer. Take
care to use quality connector adapters for the
spectrum analyzer’s input. Avoid the use of BNC-
type connectors due to their high VSWR while oper-
ating in the GHz range.
AnalysisSet the spectrum analyzer’s center frequency to
70MHz, with a frequency span of 1MHz.Set the spectrum analyzer’s marker to read the
peak power level of the center frequency. For the
MAX2680 the IF power level is nominally -13.4dBm.
The IF output power is equal to the RF input power
plus the conversion gain of the downconverter
mixer. The MAX2680 has a typical conversion gain
of 11.6dB. The MAX2681 has a typical conversion
gain of 14.2dB. The MAX2682 has a typical conver-
sion gain of 14.7dB.
tailed DescriptionThis section describes the circuitry surrounding the
MAX2680/MAX2681/MAX2682 EV kits. For more
detailed information covering device operation, please
consult the MAX2680/MAX2681/MAX2682 data sheet.
Figure 1 is the schematic for the MAX2680/MAX2681/
MAX2682 EV kits. The RF input matching components
Z1, Z2, and Z3 are optimized for each device and for
an RF frequency of 900MHz. A DC-blocking capacitor
is required on the RF port. The IF output matching com-
ponents, L1 and C2, are optimized for an IF frequency
of 70MHz and are independent of the device chosen.
Consult Tables 2 and 4 in the MAX2680/MAX2681/
MAX2682 data sheet for components appropriate for
each device at other RF and IF frequencies. Capacitor0Open1MAX2681EUT-T (6-pin SOT23)
DESIGNATION18nH inductor
Toko LL1608-FHI8NJ1Z2
270pF ceramic capacitor (0603)1Z1
DESCRIPTIONQTYAX2681 EV Kit
Additional Components
MAX2682 EV Kit
Additional Components110nH inductor
Toko LL1608-FH10NJ1MAX2682EUT-T (6-pin SOT23)
DESIGNATION270pF ceramic capacitor (0603)1Z2
1.5pF ceramic capacitor (0603)1Z1
DESCRIPTIONQTY
AX2680/MAX2681/MAX2682 Evaluation KitsC1 is a DC-blocking capacitor and is required for the
LO input port. Pads C7 and C8 are left open on the EV
kits, but are provided for experimentation. Pad R1 is left
open on the kits, but is provided as an option to resis-
tively terminate the IFOUT port.
Capacitors C4, C5, and C6 form the VCCdecoupling
network. Note the location of each component. C5, a
10μF tantalum capacitor, is located near the VCCcon-
nector. This serves as the central node for distribution
of VCCto the mixer’s supply pin and the IFOUT output
pull-up inductor L1. Capacitor C6, placed near the VCC
connection, and capacitor C4, placed near the device,
help to reduce any high-frequency crosstalk. Capacitor
C3, placed near the SHDNpin on the device, helps to
filter out any noise. For additional filtering, add resistor
R2 to the EV kit after cutting the short across the pads
for R2.
Modifying the EVThe MAX2680/MAX2681/MAX2682 EV kits are
used at RF frequencies from 400MHz to 2500MHz, and
at IF frequencies from 10MHz to 500MHz. To operate at
frequencies other than the factory configuration of
900MHz RF and 70MHz IF, refer to Tables 2 and 4 in
the MAX2680/MAX2681/MAX2682 data sheet for the
suggested component values. For operation at frequen-
cies other than those given here, consult the graphs RF
Port Impedance vs. RF Frequency and IF Port
Impedance vs. IF Frequency in the Typical Operating
Characteristicsin the MAX2680/MAX2681/MAX2682
data sheet and follow typical impedance matching
methods.
MAX2680
MAX2681
MAX2682
1000pFSHDN
VCC
SMA
SMA
270pF
IFOUT
GND
RFINIF
10mF
10V
1000pFR1
OPEN
SHORT
15pF
OPEN
330nHZ1
OPEN
C4
1000pFU1
JU1
VCC
GND
SHDN
SMA
Figure 1. MAX2680/MAX2681/MAX2682 EV Kits Schematic
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
AX2680/MAX2681/MAX2682 Evaluation KitsFigure 2. MAX2680/MAX2681/MAX2682 EV Kits PC Board
Layout —Component Silkscreen
1.0"
Figure 4. MAX2680/MAX2681/MAX2682 EV Kits PC Board
Layout —Ground Plane
Figure 3. MAX2680/MAX2681/MAX2682 EV Kits PC Board
Layout —Component Side Metal
1.0"1.0"
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Datasheets for electronic components.
