View MAX2473EVKIT_296385.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-1466; Rev 0; 6/99
MAX2472/MAX2473 Evaluation Kits
General Description
The MAX2472/MAX2473 evaluation kits (EV kits) simplify evaluation of the MAX2472/MAX2473 VCO buffers. They enable performance testing and require no additional support circuitry. All inputs and outputs use SMA connectors to facilitate connection of RF test equipment. The MAX2472 EV kit is assembled with the MAX2472 and provides a high-impedance input and a pair of open-collector outputs. The EV kit includes a matching network tuned for 900MHz. The MAX2473 EV kit is assembled with the MAX2473 and provides a highimpedance input, a single open-collector output, and a bias control input for setting the output power. Output matches for 600MHz, 1900MHz, or 2400MHz are achieved by replacing the matching components with values provided in the MAX2472/MAX2473 data sheet.
Features
o Easy Evaluation of MAX2472/MAX2473 o +2.7V to +5.5V Single-Supply Operation o Variable Bias Control (MAX2473) o Single (MAX2473) or Dual (MAX2472) OpenCollector Outputs o All Critical Peripheral Components Included
Evaluate: MAX2472/MAX2473
Ordering Information
PART TEMP. RANGE IC SOT PACKAGE TOP MARK SOT23-6 SOT23-6 AAAZ AABA
MAX2472EVKIT -40C to +85C MAX2473EVKIT -40C to +85C
MAX2472 Component List
DESIGNATION QTY C1, C4 C2, C5, C9 C3, C6, C7, C8 C10 L1 Z1 R1-R5 R6, R7 JU1 VCC, GND IN, OUT1, OUT2 U1 None 2 3 4 1 1 1 0 2 0 2 3 1 1 DESCRIPTION 1pF 0.1pF ceramic capacitors (0603) Murata GRM39COG1R0B50V 0.01F 5% ceramic capacitors (0603) Murata GRM39X7R103J50V 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J50V 1F 5% ceramic capacitor (0805) 12nH 5% inductor (0603) Coilcraft 0603HS-12NTJBC 12nH 5% inductor (0603) Coilcraft 0603HS-12NTJBC Not installed 0 resistors (0603) Not installed Test points SMA connectors (PC edge-mount) EF Johnson 142-0701-801 MAX2472EUT (6-pin SOT23, top mark AAAZ) MAX2472/MAX2473 PC board
MAX2473 Component List
DESIGNATION QTY C1 C2, C9 C3, C7, C8 C4, C5, C6 C10 L1 Z1 R1, R6 R2 R3 R4 R5, R7 JU1 None VCC, GND IN, OUT1 U1 None 1 2 3 0 1 1 1 2 1 1 1 0 1 1 2 2 1 1 DESCRIPTION 1pF 0.1pF ceramic capacitor (0603) Murata GRM39COG1R0B50V 0.01F 5% ceramic capacitors (0603) Murata GRM39X7R103J50V 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J50V Not installed 1F 5% ceramic capacitor (0805) 12nH 5% inductor (0603) Coilcraft 0603HS-12NTJBC 0 resistor (0603) 0 resistors (0603) 11k 5% resistor (0603) 15k 5% resistor (0603) 23k 5% resistor (0603) Not installed 6-pin header Shunt (JU1) Test points SMA connectors (PC edge-mount) EF Johnson 142-0701-801 MAX2473EUT (6-pin SOT23, top mark AABA) MAX2472/MAX2473 PC board
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
MAX2472/MAX2473 Evaluation Kits Evaluate: MAX2472/MAX2473
_________________________Quick Start
The MAX2472/MAX2473 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation.
_______________Detailed Description
This section describes the circuitry surrounding the IC in the MAX2472/MAX2473 EV kits. For more detailed information covering device operation, please consult the MAX2472/MAX2473 data sheet. Figure 1 shows the schematic for the MAX2472/ MAX2473 EV kits. Input capacitors C7 and C8 are 100pF DC-blocking capacitors; this value contributes minimal reactance to the signal paths, down to 500MHz. Capacitors C9 and C10 form the VCC decoupling network. Note the location of each component; a relatively large 1F tantalum capacitor, C10, is located near the VCC connector. Placed near the device, a substantially smaller 0.01F decoupling capacitor, C9, reduces any high-frequency interference. The EV kits include pad R5 to facilitate simple termination of the input. Both the MAX2472 and MAX2473 EV kits feature a bias and tuning network at OUT1. Capacitors C2 and C3 form an output bias supply decoupling network. Inductor L1 acts as an RF choke while providing DC bias and, in conjunction with C1, forms a narrowband matching network. The EV kits are output matched for 900MHz operation. The MAX2472 has an identical biassupply decoupling network and matching network for OUT2. For the MAX2473, OUT2's matching network is replaced with a set of jumpers to allow the selection of a bias resistor for the BIAS pin. Set the appropriate jumper at JU1 to select between 11k, 15k, or 23k (R2, R3, and R4, respectively).
Test Equipment Required
This section lists the test equipment recommended to verify operation of the MAX2472/MAX2473. It is intended as a guide only, and some substitutions are possible. * DC power supply capable of supplying a minimum of 10mA at +2.7V to +5.5V * RF spectrum analyzer capable of making measurements over the bandwidth of the MAX2472/MAX2473 as well as a few harmonics (if desired), such as the 6GHz HP8561E * RF signal generator capable of delivering 0dBm output power from 500MHz to 2500MHz, such as the HP8648C signal generator * 50 SMA termination * Two 50 SMA cables
Connections and Setup
1) Verify the DC power supply is set to no more than +5.5V and is off before connecting the supply to the EV kit. A good starting voltage is +3.0V. Connect the power supply between VCC and GND, then turn on the power supply. 2) Set the output power of the signal generator to -20dBm at 900MHz. Disable the generator's output, then connect the output of the signal generator to the IN SMA connector of the MAX2472/MAX2473 EV kit board. For the MAX2472, terminate OUT2 with a 50 termination. For the MAX2473, set the center jumper at JU1 to set RBIAS = 15k. 3) Connect OUT1 to the spectrum analyzer's RF input.
Component Suppliers
SUPPLIER Coilcraft E.F. Johnson PHONE FAX URL http://www. coilcraft.com http://www.ef johnson.com http://www. murata.com
800-322-2645 847-639-1469 402-474-4800 402-474-4858 770-436-1300 770-436-3030
Analysis
1) Adjust the frequency span, center frequency, and amplitude of the spectrum analyzer to observe the signal peak at 900MHz; the output signal power should read approximately -9dBm. The first harmonic (1800MHz) will be approximately -35dBm (-25dBc).
Murata
2
_______________________________________________________________________________________
MAX2472/MAX2473 Evaluation Kits Evaluate: MAX2472/MAX2473
VCC
R6 0
C3 100pF
SMA OUT1 C1 1pF
L1 12nH
C2 0.01F 1 6 C9 0.01F GND 5 C7 100pF 3 OUT2 IN 4 R5 OPEN C8 100pF SMA IN C10 1F GND
OUT1
U1 MAX2472 MAX2473
VCC
VCC
2 GND SMA OUT2 C4* 1pF
Z1 C5* R1* C6* 1 2 R2* 3 4 5 6 R3* JU1 R7 *
R4*
VCC
*REFER TO APPROPRIATE COMPONENT LIST FOR COMPONENT VALUES.
Figure 1. MAX2472/MAX2473 EV Kit Schematic
1.0"
Figure 2. MAX2472/MAX2473 EV Kit Component Placement Guide--Top Silkscreen
1.0"
Figure 3. MAX2472/MAX2473 EV Kit PC Board Layout-- Component Side
3
_______________________________________________________________________________________
MAX2472/MAX2473 Evaluation Kits Evaluate: MAX2472/MAX2473
1.0"
Figure 4. MAX2472/MAX2473 EV Kit PC Board Layout--Main Ground Plane
1.0"
Figure 5. MAX2472/MAX2473 EV Kit PC Board Layout--VCC Plane
1.0"
Figure 6. MAX2472/MAX2473 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.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX2473EVKIT

	To Download MAX2473EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .