RClamp1851ZA Ultra Small RClamp® 1-Line, 18V ESD Protection PROTECTION PRODUCTS - RailClamp® Description Features RClamp® TVS diodes are designed to protect sensitive electronics from damage or latch-up due to ESD. They are designed to replace multilayer varistors (MLVs) in portable applications such as cell phones, notebook computers, and other portable electronics. This device offers desirable characteristics for board level protection including fast response time, low operating and clamping voltage, and no device degradation. High ESD withstand Voltage: +/-17kV (Contact) and +/- 20kV (Air) per IEC 61000-4-2 Ultra-small package Protects one high speed data line Low ESD clamping voltage Working voltage: 18V Low capacitance: 0.35pF typical Low leakage current Extremely low dynamic resistance: 0.16 Ohms (Typ) Solid-state silicon-avalanche technology RClamp®1851ZA is specifically designed for protection of Near Field Communications (NFC) interfaces. It features extremely good ESD protection characteristics including a low typical dynamic resistance of 0.16 Ohms, low peak ESD clamping voltage, and high ESD withstand voltage (+/-17kV contact per IEC 61000-4-2). Low typical capacitance (0.35pF at VR=0V) means that harmonic distortion the the RF signal is minimized. This device is bidirectional and has a working voltage of 18V for use on NFC resonator circuits without signal clipping. Mechanical Characteristics RClamp1851ZA is in a 2-pin SLP0603P2X3F package measuring 0.6 x 0.3 mm with a nominal height of only 0.25mm. Leads are finished with NiAu. The small package gives the designer the flexibility to protect single lines in applications where arrays are not practical. The combination of small size and high ESD surge capability makes them ideal for use in portable applications such as cellular phones, digital cameras, and tablet PC’s. Applications Package Dimensions Near Field Communication (NFC) lines RF signal lines Cellular Handsets Tablets FM Antenna Schematic & Pin Configuration 0.600 0.220 SLP0603P2X3F package Pb-Free, Halogen Free, RoHS/WEEE Compliant Nominal Dimensions: 0.6 x 0.3 x 0.25 mm Lead Finish: NiAu Marking: Marking code Packaging: Tape and Reel 1 0.300 0.160 0.355 BSC 2 0.250 Nominal Dimensions in mm 4/15/2015 SLP0603P2X3F (Bottom View) 1 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Absolute Maximum Ratings Rating Symbol Value Units IPP 3 A VESD ±20 ±17 kV TJ -40 to +85 O TSTG -55 to +150 O Peak Pulse Current (tp = 8/20µs) ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact)(1) (1) Operating Temperature Storage Temperature C C Electrical Characteristics (T=25OC unless otherwise specified) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM T = -40 to +85OC Breakdown Voltage VBR IBR = 10µA Reverse Leakage Current IR ESD Clamping Voltage2 Min. Max. Units 18 V 22.5 26.5 V VRWM = 18V <1 50 nA VC IPP = 4A tp = 0.2/100ns 5.5 V ESD Clamping Voltage2 VC IPP = 16A tp = 0.2/100ns 7.5 V Dynamic Resistance2, 3 RDYN tp = 0.2/100ns 0.16 Ohms Junction Capacitance CJ VR = 0V; f = 1MHz 0.35 18.5 Typ. 0.45 pF Notes 1)Measured with a 40dB attenuator, 50 Ohm scope input impedance, 2GHz bandwidth. ESD gun return path connected to ESD ground plane. 2)Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and V TLP averaging window: t1 = 70ns to t2 = 90ns. 3)Dynamic resistance calculated from ITLP = 4A to ITLP = 16A 4)Device is electrically symmetrical 2015 Semtech Corporation. 2 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Typical Characteristics ESD Clamping (8kV Contact per IEC 61000-4-2) 100 10 Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 40dB attenuator. ESD gun return path connected to ESD ground plane. 90 80 0 -10 70 Clamping Voltage - VC (V) Clamping Voltage - VC (V) ESD Clamping (-8kV Contact per IEC 61000-4-2) 60 50 40 30 20 -20 -30 -40 -50 -60 10 -70 0 -80 -10 -10 0 10 20 30 40 50 60 70 -90 80 Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 40dB attenuator. ESD gun return path connected to ESD ground plane. -10 0 10 20 30 40 Time (ns) Time (ns) TLP Characteristic (Positive Pulse) 30 -5 10 5 -10 -15 -20 Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns -25 0 -30 0 5 10 15 20 -35 25 -25 Clamping Voltage (V) -15 -10 -5 0 Insertion Loss - S21 (dB) 0 0.8 ‐0.5 0.7 ‐1 0.6 ‐1.5 Insertion Loss ‐ IL (dB) Junction Capacitance - CJ (pF) -20 Clamping Voltage (V) Capacitance vs. Reverse Voltage 0.5 0.4 0.3 0.2 0.1 0 80 0 15 -5 70 5 TLP Current (A) TLP Current (A) 20 60 TLP Characteristic (Negative Pulse) Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns 25 50 ‐2 ‐2.5 ‐3 ‐3.5 ‐4 ‐4.5 f = 1MHz 0 4 8 12 16 ‐5 20 0 Voltage (V) 2015 Semtech Corporation. 3 1 Frequency (GHz) 10 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Applications Information ESD Protection of NFC Interfaces The Near Field Communication (NFC) antenna is usually connected to the NFC controller IC via contact points on the phone. These contact points are user accessable and therefore may be subjected to ESD strikes. External protection (TVS) devices should be placed between the antenna and the NFC chip interface. The working voltage of the TVS should be high enough as not to clip the NFC signal. Additionaly, the capacitance of the device RX+ should be minimized in order to avoid harmonic disctortion of the RF signal. RClamp1851ZA meets these requirements and also features extremely low dynamic resistance resulting in low ESD clamping voltage. The low dynamic resistance also helps insure protection for Schottky diodes that may be used in the NFC circuit. RClamp1851ZA is designed to work on NFC circuits with AC signals as high as 18V. An example protection ciruit is shown below in Figure 1. RX- TX+ EMI Filter Ckt Antenna Matching Ckt Antenna+ RClamp1851ZA GND NFC Controller RClamp1851ZA TX- EMI Filter Ckt Antenna Matching Ckt Antenna- REC R C Figure 1 - NFC Protection Example 2015 Semtech Corporation. 4 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Applications Information Assembly Guidelines The small size of this device means that some care must be taken during the mounting process to insure reliable solder joint. The table below provides Semtech’s recommended assembly guidelines for mounting this device. The figure at the right details Semtech’s recommended aperture based on the below recommendations. Note that these are only recommendations and should serve only as a starting point for design since there are many factors that affect the assembly process. The exact manufacturing parameters will require some experimentation to get the desired solder application. Assembly Parameter Laser cut, Electro-polished Aperture shape Rectangular with rounded corners Solder Paste Type Solder Reflow Profile PCB Solder Pad Design PCB Pad Finish 2015 Semtech Corporation. 0.175 0.272 Recommendation Solder Stencil Design Solder Stencil Thickness Stencil Aperture Mounting Pad Package 0.250 0.298 0.270 Recommended Mounting Pattern 0.100 mm (0.004") Type 4 size sphere or smaller Per JEDEC J-STD-020 Non-Solder mask defined OSP OR NiAu 5 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Outline Drawing - SLP0603P2X3F A B D DIM A A1 b D E e L N aaa bbb E TOP VIEW A 0.235 0.250 0.265 0.000 0.010 0.050 0.200 0.220 0.240 0.580 0.600 0.620 0.280 0.300 0.320 0.355 BSC 0.140 0.160 0.180 2 0.08 0.10 SEATING PLANE aaa C C A1 bbb DIMENSIONS MILLIMETERS MIN NOM MAX e/2 R0.025 TYP bxN C A B 2X L e BOTTOM VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP0603P2X3F DIMENSIONS DIM G X Y Z Z G MILLIMETERS 0.177 0.272 0.247 0.671 Y X NOTES: CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2015 Semtech Corporation. 6 www.semtech.com RClamp1851ZA PROTECTION PRODUCTS Marking Ordering Information t Part Number Qty per Reel Reel Size RClamp1851ZATFT 15000 7” Notes: 1) RailClamp and RClamp are trademarks of Semtech Corporation. Notes: Device is Electrically Symmetrical Tape and Reel Specification t t t Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2015 Semtech Corporation. 7 www.semtech.com