MAXIM MAX2386EVKIT

19-2205; Rev 0; 10/01
MAX2385/MAX2386 Evaluation Kits
Features
♦ +2.7V to +3.6V Operation
♦ 50Ω SMA Inputs and Outputs on RF, IF, and LO
Ports for Easy Testing
♦ All Matching Components Included
♦ Fully Assembled and Tested
Ordering Information
PART
TEMP. RANGE
IC PACKAGE
MAX2385EVKIT
-40°C to +85°C
5 ✕ 4 UCSP™
MAX2386EVKIT
-40°C to +85°C
5 ✕ 4 UCSP™
Component List
DESIGNATION
QTY
DESCRIPTION
C1, C42
2
1000pF ±10% ceramic capacitors
(0402)
Murata GRM36X7R102K050A
C3, C4, C39,
C40
4
7.0pF ±0.1pF ceramic capacitors
(0402)
Murata GRM36COG070B050A
C5, C6, C13,
C37, C38
5
0.5pF ±0.1pF ceramic capacitors
(0402)
Murata GRM36COG0R5B050A
C7, C8, C22,
C24, C30,
C34, C35
7
100pF ±5% ceramic capacitors
(0402)
Murata GRM36COG101J050A
C9, C26
2
0.01µF 10% ceramic capacitors
(0402)
Murata GRM36X7R103K016A
1
3.0pF ±0.1pF ceramic capacitor
(0402)
Murata GRM36COG030B050A
C12
6.8nF ±10% ceramic capacitors
Murata GRM36COG682B050A
DESIGNATION
QTY
DESCRIPTION
C27
1
22µF ±10% tantalum capacitor,
C case
AVX TAJC226K016
C28
1
1.8pF ±0.1pF ceramic capacitor
(0402)
Murata GRM36COG1R8B050A
J1, J2, J3, J5,
J9, J11, J12
7
SMA edge mounts
EFJohnson 142-0701-801
J4, J7, J10
3
SMA PC mounts
EFJohnson 142-0701-201
JU1, JU2,
JU3, JU8
4
1 ✕ 2 headers (0.1in centers)
Digi-Key S1012-36-ND
JU4–JU7
4
1 ✕ 3 headers (0.1in centers)
Digi-Key S1012-36-ND
JU1–JU9
9
Shunts
Digi-Key S9000-ND
L2, L3, L10,
L11
4
180nH 5% inductors
Toko 1608-FSR18J
L4
1
2.7nH ±0.3nH inductor
Toko 1608-FS2N7S
C16, C23,
C29, C33
4
C19
1
2.2pF ±0.1pF ceramic capacitor
(0402)
Murata GRM36COG2R2B050A
L5, L6
2
5.6nH ±0.3nH inductors
Toko 1608-FS5N6S
C25, C32
2
2.0pF ±0.1pF ceramic capacitors
Murata GRM36COG020B050A
L7
1
22nH ±2% inductor
Murata LQW1608A22NG00
L8
1
3.9nH ±0.3nH inductor
Toko 1608 FS3N9S
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Evaluate: MAX2385/MAX2386
General Description
The MAX2385/MAX2386 evaluation kits (EV kits) simplify evaluation of the MAX2385/MAX2386. The EV kits
allow the evaluation of the CDMA and GPS low-noise
amplifiers (LNA), as well as the CDMA and GPS downconverter mixers, without the use of any additional support circuitry. The signal inputs and outputs use SMA
connectors to simplify the connection of RF test equipment.
The MAX2385/MAX2386 EV kits are assembled with an
associated IC and incorporate input and output matching components optimized for RF frequencies from
832MHz to 870MHz and an IF frequency of 110MHz.
Evaluate: MAX2385/MAX2386
MAX2385/MAX2386 Evaluation Kits
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
L9
1
10nH ±2% inductor
Murata LQW1608A10NG00
R2, R3, R4,
R10
4
0Ω ±1% resistors (0402)
R5
1
47.5kΩ ±1% resistor (0402)
R6, R7
2
69.8Ω ±1% resistors (0402)
R8
1
20kΩ ±1% resistor (0402)
T1, T2
2
Transformers
Macom ETC1-1T
U1
1
MAX2385EBP/MAX2386EBP
5 ✕ 4 UCSP
VCC, GND,
TP1
3
Test points
Digi-Key 5000K-ND
Component Suppliers
PHONE
FAX
AVX
SUPPLIER
843-448-9411
843-448-1943
Murata
770-436-1300
770-436-3030
Toko
408-432-8281
408-943-9790
Quick Start
The MAX2385/MAX2386 EV kits are fully assembled
and factory tested. Follow the instructions in the
Connections and Setup section for proper device evaluation.
Test Equipment Required
Table 1 lists the required test equipment to verify
MAX2385/MAX2386 operation. It is intended as a guide
only, and some substitutions are possible.
Table 1. Required Test Equipment
EQUIPMENT
DESCRIPTION
Connections and Setup
This section provides a step-by-step guide to operating
the EV kits and testing the devices’ functions. Ensure
that the shunts across jumpers ICLNA (JU1), IGLNA
(JU2), ICMIX (JU8), and IGMIX (JU3) are installed. Do
not turn on DC power or RF signal generators until all
connections are made.
Testing the Supply Current
1) Connect a DC supply set to +2.75V (through an
ammeter, if desired) to the VCC and GND terminals
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
2) Set the shunt across BUFF (JU7) to OFF. See Table
2 for positions of the shunts across G1, G2, and
MODE for the different modes of operation.
3) Turn on the DC supply; the supply current should
read approximately 0mA (shutdown mode), 9.6mA
(GPS mode, MAX2385), 16.9mA (GPS mode,
MAX2386), 3.7mA (ULG mode), 6.5mA (LG mode),
10.3mA (MG mode), 12.5mA (HGLL mode), and
17.4mA (HGHL mode).
4) Set the shunt across BUFF (JU7) to ON. This should
increase the current consumption in each mode by
5.2mA.
Testing the CDMA LNA
1) Connect a DC supply set to +2.75V (through an
ammeter if desired) to the VCC and GND terminals
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
2) See Table 2 for positions of the shunts across G1,
G2, and MODE for the different CDMA LNA modes.
3) Connect one RF signal generator to the CLNAIN
SMA connector. Do not turn on the generator’s output. Set the generator to an output frequency of
851MHz and set the generator power level to
-30dBm.
4) Connect the spectrum analyzer to the CLNAOUT
SMA connector. Set the spectrum analyzer to a center frequency of 851MHz and a total span of 10MHz.
RF Signal
Generators
Capable of delivering at least 0dBm of
output power up to 1.6GHz (HP 8648C or
equivalent)
RF Spectrum
Analyzer
Capable of covering the operating
frequencies of the device, as well as a few
harmonics (HP 8561E or equivalent)
Power Supply
Capable of up to 40mA at +2.7V to +3.6V
Power Meter
Capable of measuring up to 20dBm
Ammeter
To measure supply current (optional)
5) Turn on the DC supply, then activate the RF generator’s output. An 851MHz signal shown on the spectrum analyzer display should indicate a magnitude of
approximately -15dBm (HGHL mode), -16dBm
(HGLL mode), -29dBm (MG mode), and -35dBm (LG
mode). Be sure to account for cable losses (between
0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure.
Network
Analyzer
To measure small-signal return loss and
gain (optional, HP 8753D or equivalent)
6) (Optional) Another method for determining gain is by
using a network analyzer. This has the advantage of
2
_______________________________________________________________________________________
MAX2385/MAX2386 Evaluation Kits
MODES
FUNCTION
CONTROL PINS
LNA
MIXER
G1
G2
MODE
HGHL
HGLL
MG
LGHL
GPS
HG
MG
LG
ULG
GPS
High Gain, High
Linearity (HGHL)
0
0
1
●
—
—
—
—
●
—
—
—
—
High Gain, Low
Linearity (HGLL)
1
1
0
—
●
—
—
—
●
—
—
—
—
●
—
—
—
●
—
—
●
—
—
—
●
—
—
Midgain (MG)
1
0
1
—
—
Low Gain (LG)
1
1
1
—
—
Ultra-Low Gain
(ULG)
1
0
0
—
—
—
●
—
—
—
—
●
—
GPS
0
1
1
—
—
—
—
●
—
—
—
—
●
Shutdown
(SHDN)
0
X
—
—
—
—
—
—
—
—
—
—
—
displaying gain over a swept frequency band, in
addition to displaying input and output return loss.
Refer to the network analyzer manufacturer’s user
manual for setup details.
displaying gain over a swept frequency band, in
addition to displaying input and output return loss.
Refer to the network analyzer manufacturer’s user
manual for setup details.
Testing the GPS LNA
1) Connect a DC supply set to +2.75V (through an
ammeter, if desired) to the VCC and GND terminals
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
Testing the CDMA Mixer
1) Connect a DC supply set to +2.75V (through an
ammeter if desired) to the VCC and GND terminals
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
2) Set the shunt across MODE to HI, across G1 to LO,
and across G2 to HI. This places the device in GPS
mode (see Table 2).
2) See Table 2 for positions of the shunts across G1,
G2, and MODE for the different CDMA mixer modes.
3) Connect one RF signal generator to the GLNAIN
SMA connector. Do not turn on the generator’s output. Set the generator to an output frequency of
1575.42MHz and set the generator power level to
-30dBm.
4) Connect the spectrum analyzer to the GLNAOUT
SMA connector. Set the spectrum analyzer to a center frequency of 1575.42MHz and a total span of
10MHz.
5) Turn on the DC supply and activate the RF generator’s output. A 1575.42MHz signal shown on the
spectrum analyzer display should indicate a magnitude of approximately -12dBm (MAX2385) or -10dBm
(MAX2386). Be sure to account for cable losses
(between 0.5dB and 2dB) and circuit board losses
(approximately 0.5dB) when computing gain and
noise figure.
6) (Optional) Another method for determining gain is by
using a network analyzer. This has the advantage of
3) Connect one RF signal generator to the LO_IN SMA
connector. Do not turn on the generator output. Set
the frequency to 1482MHz, and output power to
-10dBm. This is the LO signal.
4) Connect another RF signal generator to the CMIXIN
SMA connector. Do not turn on the generator output.
Set the signal generator to 851MHz and output
power level to -30dBm.
5) Connect the spectrum analyzer to the CIF SMA connector. Set the spectrum analyzer to a center frequency of 110MHz and a total span of 10MHz.
6) Turn on the DC supply and the signal generator outputs.
7) A 110MHz signal shown on the spectrum analyzer
display should indicate a magnitude of approximately
-19dBm (HGHL/HGLL mode), -19dBm (MG mode),
-20dBm (LG mode), or -27dBm (ULG mode). Be sure
to account for cable losses (between 0.5dB and 2dB)
and circuit board losses (approximately 0.5dB) when
computing gain and noise figure.
_______________________________________________________________________________________
3
Evaluate: MAX2385/MAX2386
Table 2. Mode Selection Truth Table
Evaluate: MAX2385/MAX2386
MAX2385/MAX2386 Evaluation Kits
Testing the GPS Mixer
1) Connect a DC supply set to +2.75V (through an
ammeter, if desired) to the VCC and GND terminals
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
2) Set the shunt across MODE to HI, across G1 to LO,
and across G2 to HI. This places the device in GPS
mode (see Table 2).
3) Connect one RF signal generator to the LO_IN SMA
connector. Do not turn on the generator output. Set
the frequency to 1465.42MHz, and output power to
-10dBm. This is the LO signal.
4) Connect another RF signal generator to the GMIXIN
SMA connector. Do not turn on the generator output.
Set the signal generator to 1575.42MHz and output
power level to -30dBm.
5) Connect the spectrum analyzer to the GIF SMA connector. Set the spectrum analyzer to a center frequency of 110MHz and a total span of 10MHz.
6) Turn on the DC supply and the signal generator outputs.
7) A 110MHz signal shown on the spectrum analyzer
display should indicate a magnitude of approximately -18dBm (MAX2385) or -17dBm (MAX2386). Be
sure to account for cable losses (between 0.5dB and
2dB) and circuit board losses (approximately 0.5dB)
when computing gain and noise figure.
Testing the LO Output Buffer
1) Connect a DC supply set to +2.75V (through an
ammeter, if desired) to the VCC and GND terminals
4
on the EV kit. If available, set the current limit to
40mA. Do not turn on the supply.
2) Set the shunt across jumper BUFF (JU7) to ON.
3) Connect one RF signal generator to the LO_IN SMA
connector. Do not turn on the generator output. Set
the frequency to 1482MHz, and output power to
-10dBm.
4) Connect the spectrum analyzer to the LO_OUT SMA
connector. Set the spectrum analyzer to a center frequency of 741MHz and a total span of 10MHz.
5) Turn on the DC supply and the signal generator outputs.
6) A 741MHz signal shown on the spectrum analyzer
display should indicate a magnitude of approximately
-14dBm. Be sure to account for cable losses
(between 0.5dB and 2dB), the 7.4dB 100Ω to 50Ω
matching pad, and circuit board losses (approximately 0.5dB) when computing gain and noise figure.
Layout
The EV kit’s PC board can serve as a guide for laying
out a circuit board using the MAX2385/MAX2386.
Keep RF signal lines as short as possible to minimize
losses and radiation. Always use controlled-impedance
lines on all high-frequency inputs and outputs and use
low-inductance connections to ground on all GND pins.
At the mixer outputs, keep the differential lines together
and of the same length to ensure signal balance.
_______________________________________________________________________________________
MAX2385/MAX2386 Evaluation Kits
Evaluate: MAX2385/MAX2386
VCC
2 JU3 1
VCC
IGMIX
J3
C1
1000pF
5
L2
180nH
C5
0.5pF
C7
100pF
T1
1
C6
0.5pF
JU4
1
HI
2 MODE
LO
3
L5
5.6nH
C4
7.0pF
2
4
L3
180nH
R2
0Ω
3
L7
22nH
1 JU8
C8
100pF
IGLNA
C9
0.01µF
C13
0.5pF
C42
1000pF
J11
2
ICMIX
L4
2.7nH
C37
0.5pF
L10
180nH
L11
180nH
C38
0.5pF
C35
100pF
VCC
2 JU1 1
1
C39
7.0pF
2
A5
CMIXIN
A3
LO_IN
4
C40
7.0pF
C4
C24
100pF
B4
C5
R6
69.8Ω
D5
J12
R7
69.8Ω
GND
GND
C2
L8
3.9nH
GMIXIN
B3
LO_OUT
GLNAIN
5
B5
VCC
D4
D1
CIF-
MAX2385
G1
VCC
C1
GND
CIF+
D3
HI
G1 2
LO
3
B2
R4
0Ω
G2
1
RBIAS
JU5
U1
CLNAOUT
C3
B1
VCC
T2
3
GLNAOUT
CLNAIN
A1
C22
100pF
D2
C12
3pF
MODE
L6
5.6nH
GIF-
GIF+
A2
R3
0Ω
A4
ICLNA
C29
6.8nF
J7
VCC
2 JU2 1
J5
C23
6.8nF
C25
2.0pF
VCC
J1
J4
C19
2.2pF
C3
7.0pF
J2
C16
6.8nF
R8
20kΩ
C28
1.8pF
VCC
JU7
1
ON
2 BUFF
OFF
3
C30
100pF
J10
J6
TP1
R5
47.5kΩ
J9
C33
6.8nF
L9
10nH
C32
2pF
INDO603
C27
22µF
C34
100pF
C26
0.01µF
J8
VCC
R10
0Ω
JU6
1
HI
2 G2
LO
3
Figure 1. MAX2385/2386 EV Kit Schematic
_______________________________________________________________________________________
5
Evaluate: MAX2385/MAX2386
MAX2385/MAX2386 Evaluation Kits
1.0"
Figure 2. MAX2385/MAX2386 EV Kit Component Placement
Guide—Component Side
1.0"
Figure 3. MAX2385/MAX2386 EV Kit Component Placement
Guide—Solder Side
6
1.0"
Figure 4. MAX2385/MAX2386 EV Kit PC Board Layout—Ground
Plane 1
1.0"
Figure 5. MAX2385/MAX2386 EV Kit PC Board
Layout—Component Side
_______________________________________________________________________________________
MAX2385/MAX2386 Evaluation Kits
1.0"
Figure 6. MAX2385/MAX2386 EV Kit PC Board Layout
1.0"
Figure 8. MAX2385/MAX2386 EV Kit PC Board Layout—
Component Side
1.0"
Figure 7. MAX2385/MAX2386 EV Kit PC Board Layout
Figure 9. MAX2385/MAX2386 EV Kit PC Board Layout—Solder
Side
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
Evaluate: MAX2385/MAX2386
1.0"