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| Product Specification PE4257 Product Description The PE4257 is a high-isolation UltraCMOSTM Switch designed for wireless applications, covering a broad frequency range from near DC up to 3000 MHz. This single-supply SPDT switch integrates a two-pin CMOS control interface. It also provides low insertion loss with extremely low bias requirements while operating on a single 3-volt supply. In a typical wireless application, the PE4257 provides unprecedented isolation and integration. The PE4257 is manufactured in Peregrine's patented Ultra Thin Silicon (UTSi(R)) CMOS process, offering the performance of GaAs with the economy and integration of conventional CMOS. Figure 1. Functional Diagram Figure 2. Package Type RFC 50 SPDT Absorptive UltraCMOSTM DC - 3.0 GHz RF Switch Features * 50 characteristic impedance * Integrated 50 0.25 watt terminations * High input IP3 > +55 dBm * High isolation 64 dB at 1000 MHz * Low insertion loss: typically 0.75 dB at 1000 MHz and 0.95 dB at 2000 MHz * LV CMOS two-pin control * Single +3 volt supply operation * Low current consumption: 8 A 4x4mm 20 Lead QFN RF1 RF2 CMOS Control Driver CTRL1 CTRL2 Table 1. Electrical Specifications @ +25 C, VDD = 3.0 V (ZS = ZL = 50 ) Parameter Operating Frequency Insertion Loss 1 Condition 1000 MHz 2000 MHz 3000 MHz 1000 MHz 2000 MHz 3000 MHz 1000 MHz 2000 MHz 3000 MHz 5 MHz - 1000 MHz 5 MHz - 1000 MHz 1000 MHz 50% CTRL to 10 / 90 RF 5 MHz - 1000 MHz Minimum DC Typical 0.75 0.95 1.2 Maximum 3000 0.95 1.15 1.4 Units MHz dB Isolation Input to Output 61 46 40 57 54 42 50 29 64 50 44 63 60 48 80 55 31 2 15 dB Isolation Output to Output Input IP2 Input IP3 Input 1dB Compression2 Switching Time Video Feedthrough3 dB dBm dBm dBm s mVpp Notes: 1. Device linearity will begin to degrade below 1 MHz. 2. Note Absolute Maximum ratings in Table 3. 3. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth Document No. 70-0166-02 www.psemi.com (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 1 of 7 PE4257 Product Specification Figure 3. Pin Configuration (Top View) 18 VSS/GND 19 GND CTRL1 CTRL2 VDD Table 3. Absolute Maximum Ratings Symbol VDD VI Parameter/Condition Power supply voltage Voltage on CTRL input RF power on RFC, RF1, RF2 On Port/ Terminated Port Storage temperature Operating temperature ESD voltage (Human Body Model) Min -0.3 -0.3 Max 4.0 VDD + 0.3 33/24 Unit V V dBm C C V 20 17 16 GND GND RF1 GND, RF1 Term. GND 1 GND 2 3 4 5 15 GND 14 GND 13 RF2 PRF TST TOP VESD -65 -40 1000 +150 +85 12 GND, RF2 Term. 11 GND 4x4mm 20-Lead QFN Table 2. Pin Descriptions No. 1 2 3 4 5 6 7 81 9 10 11 12 13 14 15 162 17 18 19 20 Pad Notes: 1. RF pins 3, 8, and 13 must be at 0 VDC. The RF pins do not require DC blocking capacitors for proper operation if the 0 VDC requirement is met. 2. Pins 16 and 17 are the CMOS controls that set the four operating states. 3. Connect pin 18 to GND to enable the negative voltage generator. Connect pin 18 to VSS (-3 V) to bypass and disable internal -3 V supply generator. See paragraph "Switching Frequency." 2 3 1 1 Absolute Maximum Ratings are those values listed in the above table. Exceeding these values may cause permanent device damage. Functional operation should be restricted to the limits in the DC Electrical Specifications table. Exposure to absolute maximum ratings for extended periods may affect device reliability. Table 4. DC Electrical Specifications @ 25 C Parameter VDD Power Supply IDD Power Supply Current (VDD = 3V, VCNTL = 3V) Control Voltage High Control Voltage Low 0.70 VDD 0 0.30 VDD V V Name GND GND RF1 GND GND GND GND RFC GND GND GND GND RF2 GND GND CTRL2 CTRL1 VSS / GND GND VDD GND RF Ground RF Ground RF I/O RF Ground RF Ground RF Ground RF Ground RF Common RF Ground RF Ground RF Ground RF Ground RF I/O RF Ground RF Ground Control 2 Control 1 Description Min 2.7 GND 10 6 7 8 RFC GND GND GND 9 Typ 3.0 8 Max 3.3 20 Unit V A Latch-Up Avoidance Unlike conventional CMOS devices, UltraCMOSTM devices are immune to latch-up. Electrostatic Discharge (ESD) Precautions When handling this UltraCMOSTM device, observe the same precautions that you would use with other ESD-sensitive devices. Although this device contains circuitry to protect it from damage due to ESD, precautions should be taken to avoid exceeding the rating specified. Switching Frequency The PE4257 has a maximum 25 kHz switching rate when the internal negative voltage generator is used (pin 18=GND). The rate at which the PE4257 can be switched is only limited to the switching time if an external -3 V supply is provided at (pin18=VSS ). Document No. 70-0166-02 UltraCMOSTM RFIC Solutions Negative Supply Option Digital Ground Supply RF Ground Pad (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 2 of 7 PE4257 Product Specification Table 5. Truth Table CTRL1 Low Low High High CTRL2 Low High Low High RFC - RF1 OFF OFF ON N/A 1 RFC - RF2 OFF ON OFF N/A1 Document No. 70-0166-02 www.psemi.com (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 3 of 7 PE4257 Product Specification Typical Performance Data @ 25C (Unless Otherwise Noted) (50-ohm impedance) Figure 4. Insertion Loss - Input - Output Figure 5. RF1 to RF2 Isolation Figure 6. Isolation - RFC to RF1/RF2 Figure 7. Return Loss (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 4 of 7 Document No. 70-0166-02 UltraCMOSTM RFIC Solutions PE4257 Product Specification Evaluation Kit The SPDT Switch Evaluation Kit board was designed to ease customer evaluation of the PE4257 SPDT switch. The RF common port is connected through a 50 transmission line to J2. Port 1 and Port 2 are connected through 50 transmission lines to J1 and J3. A through transmission line connects SMA connectors J4 and J5. This transmission line can be used to estimate the loss of the PCB over the environmental conditions being evaluated. The board is constructed of a four metal layer FR4 material with a total thickness of 0.031". The transmission lines were designed using a coplanar waveguide with ground plane (28 mil core, 47.6 mil width, 30mil gap). Note the number of vias surrounding the device in the layout shown in Figure 8. These vias are critical for obtaining the specified isolation performance for the device shown in this datasheet. J6 provides a means for controlling DC and digital inputs to the device. The provided jumpers short the package pin to ground for logic low. When the jumper is removed, the pin is pulled up to VDD for logic high. When the jumper is in place, 3 A of current will flow through the 1 M pull up resistor. This extra current should not be attributed to the requirements of the device. Figure 8. Evaluation Board Layouts Peregrine Specification 101/0151 Figure 9. Evaluation Board Schematic Peregrine Specification 102/0198 Document No. 70-0166-02 www.psemi.com (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 5 of 7 PE4257 Product Specification Figure 10. Package Drawing 20-Lead 4x4 QFN 4.00 INDEX AREA 2.00 X 2.00 -B2.00 2.00 0.25 C -A0.10 C 0.08 C 0.020 0.20 REF EXPOSED PAD & TERMINAL PADS 0.435 0.18 SEATING PLANE 0.80 4.00 -C2.00 TYP 0.50 TYP 0.55 2.00 1.00 5 11 0.435 0.18 4.00 1. DIMENSION APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 AND 0.30 FROM TERMINAL TIP. 2. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. DETAIL A 1 20 16 15 EXPOSED PAD 0.23 2.00 DETAIL A 1.00 6 10 2 1 0.10 CAB Table 6. Ordering Information Order Code 4257-01 4257-02 4257-00 4257-51 4257-52 Part Marking 4257 4257 PE4257-EK 4257 4257 Description PE4257-20QFN 4x4mm-75A PE4257-20QFN 4x4mm-3000C PE4257-20QFN 4x4mm-EK PE4257G-20QFN 4x4mm-75A PE4257G-20QFN 4x4mm-3000C Package 20-lead 4x4mm QFN 20-lead 4x4mm QFN Evaluation Kit Green 20-lead 4x4mm QFN Green 20-lead 4x4mm QFN Shipping Method 75 units / Tube 3000 units / T&R 1 / Box 75 units / Tube 3000 units / T&R (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 6 of 7 Document No. 70-0166-02 UltraCMOSTM RFIC Solutions PE4257 Product Specification Sales Offices The Americas Peregrine Semiconductor Corp. 9450 Carroll Park Drive San Diego, CA 92121 Tel 858-731-9400 Fax 858-731-9499 North Asia Pacific Peregrine Semiconductor K.K. 5A-5, 5F Imperial Tower 1-1-1 Uchisaiwaicho, Chiyoda-ku Tokyo 100-0011 Japan Tel: +81-3-3502-5211 Fax: +81-3-3502-5213 Europe Peregrine Semiconductor Europe Commercial Products: Batiment Maine 13-15 rue des Quatre Vents F- 92380 Garches, France Tel: +33-1-47-41-91-73 Fax : +33-1-47-41-91-73 Space and Defense Products: 180 Rue Jean de Guiramand 13852 Aix-En-Provence cedex 3, France Tel: +33(0) 4 4239 3361 Fax: +33(0) 4 4239 7227 South Asia Pacific Peregrine Semiconductor 28G, Times Square, No. 500 Zhangyang Road, Shanghai, 200122, P.R. China Tel: +86-21-5836-8276 Fax: +86-21-5836-7652 For a list of representatives in your area, please refer to our Web site at: www.psemi.com Data Sheet Identification Advance Information The product is in a formative or design stage. The data sheet contains design target specifications for product development. Specifications and features may change in any manner without notice. The information in this data sheet is believed to be reliable. However, Peregrine assumes no liability for the use of this information. Use shall be entirely at the user's own risk. No patent rights or licenses to any circuits described in this data sheet are implied or granted to any third party. Peregrine's products are not designed or intended for use in devices or systems intended for surgical implant, or in other applications intended to support or sustain life, or in any application in which the failure of the Peregrine product could create a situation in which personal injury or death might occur. Peregrine assumes no liability for damages, including consequential or incidental damages, arising out of the use of its products in such applications. The Peregrine name, logo, and UTSi are registered trademarks and UltraCMOS is a trademark of Peregrine Semiconductor Corp. Preliminary Specification The data sheet contains preliminary data. Additional data may be added at a later date. Peregrine reserves the right to change specifications at any time without notice in order to supply the best possible product. Product Specification The data sheet contains final data. In the event Peregrine decides to change the specifications, Peregrine will notify customers of the intended changes by issuing a DCN (Document Change Notice). Document No. 70-0166-02 www.psemi.com (c)2005 Peregrine Semiconductor Corp. All rights reserved. Page 7 of 7 |
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