Evaluate: MAX2472/MAX2473 19-1466 Rev 0 6/99 MAX2472/MAX2473 Evaluation Kits General Description Features The MAX2472/MAX2473 evaluation kits (EV kits) simpli- Easy Evaluation of MAX2472/MAX2473 fy evaluation of the MAX2472/MAX2473 VCO buffers. +2.7V to +5.5V Single-Supply Operation They enable performance testing and require no addi- Variable Bias Control (MAX2473) tional support circuitry. All inputs and outputs use SMA connectors to facilitate connection of RF test equip- Single (MAX2473) or Dual (MAX2472) Open- ment. Collector Outputs The MAX2472 EV kit is assembled with the MAX2472 All Critical Peripheral Components Included 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 Ordering Information assembled with the MAX2473 and provides a high- IC SOT impedance input, a single open-collector output, and a PART TEMP. RANGE PACKAGE TOP MARK bias control input for setting the output power. Output matches for 600MHz, 1900MHz, or 2400MHz are MAX2472EVKIT -40C to +85C SOT23-6 AAAZ achieved by replacing the matching components with MAX2473EVKIT -40C to +85C SOT23-6 AABA values provided in the MAX2472/MAX2473 data sheet. MAX2473 Component List MAX2472 DESIGNATION QTY DESCRIPTION Component List 1pF 0.1pF ceramic capacitor (0603) C1 1 Murata GRM39COG1R0B50V DESIGNATION QTY DESCRIPTION 0.01F 5% ceramic capacitors (0603) C2, C9 2 1pF 0.1pF ceramic capacitors Murata GRM39X7R103J50V C1, C4 2 (0603) Murata GRM39COG1R0B50V 100pF 5% ceramic capacitors (0603) C3, C7, C8 3 Murata GRM39COG101J50V 0.01F 5% ceramic capacitors (0603) C2, C5, C9 3 Murata GRM39X7R103J50V C4, C5, C6 0 Not installed C10 1 1F 5% ceramic capacitor (0805) 100pF 5% ceramic capacitors (0603) C3, C6, C7, C8 4 Murata GRM39COG101J50V 12nH 5% inductor (0603) L1 1 Coilcraft 0603HS-12NTJBC C10 1 1F 5% ceramic capacitor (0805) Z1 1 0 resistor (0603) 12nH 5% inductor (0603) L1 1 R1, R6 2 0 resistors (0603) Coilcraft 0603HS-12NTJBC R2 1 11k 5% resistor (0603) 12nH 5% inductor (0603) Z1 1 R3 1 15k 5% resistor (0603) Coilcraft 0603HS-12NTJBC R4 1 23k 5% resistor (0603) R1R5 0 Not installed R5, R7 0 Not installed R6, R7 2 0 resistors (0603) JU1 1 6-pin header JU1 0 Not installed None 1 Shunt (JU1) VCC, GND 2 Test points VCC, GND 2 Test points IN, OUT1, SMA connectors (PC edge-mount) 3 SMA connectors (PC edge-mount) OUT2 EF Johnson 142-0701-801 IN, OUT1 2 EF Johnson 142-0701-801 MAX2472EUT MAX2473EUT U1 1 U1 1 (6-pin SOT23, top mark AAAZ) (6-pin SOT23, top mark AABA) None 1 MAX2472/MAX2473 PC board None 1 MAX2472/MAX2473 PC board Maxim Integrated Products 1 For free samples & the latest literature: MAX2472/MAX2473 Evaluation Kits Quick Start Detailed Description The MAX2472/MAX2473 EV kits are fully assembled This section describes the circuitry surrounding the IC and factory tested. Follow the instructions in the in the MAX2472/MAX2473 EV kits. For more detailed Connections and Setup section for proper device eval- information covering device operation, please consult uation. the MAX2472/MAX2473 data sheet. Figure 1 shows the schematic for the MAX2472/ Test Equipment Required MAX2473 EV kits. Input capacitors C7 and C8 are This section lists the test equipment recommended to 100pF DC-blocking capacitors this value contributes verify operation of the MAX2472/MAX2473. It is intend- minimal reactance to the signal paths, down to ed as a guide only, and some substitutions are possi- 500MHz. Capacitors C9 and C10 form the V decou- CC ble. pling network. Note the location of each component a DC power supply capable of supplying a minimum relatively large 1F tantalum capacitor, C10, is located of 10mA at +2.7V to +5.5V near the V connector. Placed near the device, a sub- CC RF spectrum analyzer capable of making measure- stantially smaller 0.01F decoupling capacitor, C9, reduces any high-frequency interference. The EV kits ments over the bandwidth of the MAX2472/MAX2473 as well as a few harmonics (if desired), such as the include pad R5 to facilitate simple termination of the 6GHz HP8561E input. RF signal generator capable of delivering 0dBm out- Both the MAX2472 and MAX2473 EV kits feature a bias put power from 500MHz to 2500MHz, such as the and tuning network at OUT1. Capacitors C2 and C3 form an output bias supply decoupling network. HP8648C signal generator Inductor L1 acts as an RF choke while providing DC 50 SMA termination bias and, in conjunction with C1, forms a narrowband Two 50 SMA cables matching network. The EV kits are output matched for 900MHz operation. The MAX2472 has an identical bias- Connections and Setup supply decoupling network and matching network for 1) Verify the DC power supply is set to no more than OUT2. For the MAX2473, OUT2s matching network is +5.5V and is off before connecting the supply to the replaced with a set of jumpers to allow the selection of EV kit. A good starting voltage is +3.0V. Connect the a bias resistor for the BIAS pin. Set the appropriate power supply between V and GND, then turn on CC jumper at JU1 to select between 11k, 15k, or 23k the power supply. (R2, R3, and R4, respectively). 2) Set the output power of the signal generator to -20dBm at 900MHz. Disable the generators output, then connect the output of the signal generator to Component Suppliers the IN SMA connector of the MAX2472/MAX2473 EV kit board. For the MAX2472, terminate OUT2 with a SUPPLIER PHONE FAX URL 50 termination. For the MAX2473, set the center