Da t as heet AS1747 L o w - Vo l ta g e , D u a l S P D T, A u d i o C l i c k l e s s S w i t c h w i t h N e g a t i v e R a i l C a pa b i l i t y 1 General Description 2 Key Features The SPDT (single-pole/double-throw) switch AS1747 allows signals below ground to pass through without distortion. This analog switch is ideal for switching audio signals, due to the supply voltage from +1.8V to +5.5V and the low 0.4Ω on-resistance. This SPDT switch is available in space-saving 10-pin TDFN 3x3 packages and operate over the -40ºC to +85ºC extended temperature range. ! Distortion -Free Negative Signal Throughput Down to VCC - 5.5V ! Low On-Resistance (RON) 0.4Ω at +2.7V Supply ! 0.25Ω On-Resistance Flatness ! 0.03Ω On-Resistance Matching ! +1.8V to 5.5V Supply Voltage ! -90dB Crosstalk (100kHz) ! -65dB Off-Isolation (100kHz) ! Available in 10-pin TDFN 3x3 Packages 3 Applications The device is ideal for cell phones, PDAs and hand-held devices, notebook computers and MP3 players. Figure 1. AS1747 - Typical Operating Circuit Out+ Audio Source 1 NC1 Out- COM1 NO1 IN1 8Ω Speaker AS1747 IN2 NC2 COM2 Out+ Audio Source 2 www.austriamicrosystems.com Out- Input Select NO2 Revision 1.01 1 - 13 AS1747 Datasheet - P i n o u t 4 Pinout Pin Assignment Figure 2. Pin Assignments (Top View) VCC 1 10 NO2 9 COM2 NO1 2 8 NC2 COM1 3 NC1 4 7 IN2 IN1 5 6 GND Pin Description Table 1. Pin Description Pin Name TDFN Description VCC 1 Positive-Supply Voltage Input NO1 2 Analog Switch 1 - Normally Open Terminal COM1 3 Analog Switch 1 - Common Terminal NC1 4 Analog Switch 1 - Normally Closed Terminal IN1 5 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. GND 6 Ground IN2 7 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to N02. NC2 8 Analog Switch 2 - Normally Closed Terminal COM2 9 Analog Switch 2 - Common Terminal NO2 10 Analog Switch 2 - Normally Open Terminal www.austriamicrosystems.com Revision 1.01 2 - 13 AS1747 Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter Min Max Units VCC, IN_ -0.3 +6.0 V COM_, NO_, NC_ VCC - 6 VCC + 0.3 V Closed-Switch Continuous Current COM_, NO_, NC_ ±150 mA Open-Switch Continuous Current NO_, NC_ ±30 mA Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle) ±400 mA 1951 mW Comments Continuous Power Dissipation (TA = +70ºC) 10-Pin TDFN (derate 24.4mW/ºC above +70ºC) ESD 2 kV HBM MIL-Std. 883E 3015.7 methods @25°C, JEDEC 78 Latchup Immunity -200 +200 mA Operating Temperature Range -40 +85 ºC +150 ºC +150 ºC Junction Temperature Storage Temperature Range Package Body Temperature www.austriamicrosystems.com -65 +260 Revision 1.01 ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD020D “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for Pb-free leaded packages is matte tin (100% Sn). 3 - 13 AS1747 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VCC = +2.7V to +5.5V, TA = -40ºC to +85ºC, unless otherwise specified. Typical values are at VCC = +3.0V, TA = +25ºC, unless otherwise specified. Table 3. Electrical Characteristics Symbol Parameter Condition Min Typ Max Unit VCC V Analog Switch VNO_ VNC_ VCOM_ Analog Signal Range RON(NC) RON(NO) On-Resistance ΔRON On-Resistance Match Between Channels VCC = 2.7V, VNC_ or VNO_ = 0V, ICOM = 100mA RFLAT(NC) On-Resistance Flatness VCC = 2.7V; VNC_ or VNC = -1V, 0V, 1V, 2V, VCC; ICOM_ = 100mA INO_(OFF) INC_(OFF) NO_, NC_ Off-Leakage Current VCC = 2.7V, switch open; VNC_ or VNO_ = -2.5V, +2.5V; VCOM_ = +2.5V, -2.5V ICOM_(ON) COM_ On-Leakage Current VCC 5.5 VCC = 2.7V; VNC_ or VNO_ = VCC - TA = +25ºC 5.5V, -1V, 0V, 1V, 2V, VCC; ICOM_ = TA = TMIN to 100mA TMAX 0.4 TA = +25ºC 0.03 0.85 0.95 TA = TMIN to TMAX 0.1 0.15 TA = +25ºC 0.25 TA = TMIN to TMAX Ω 0.4 0.45 TA = +25ºC -10 +10 TA = TMIN to TMAX -200 +200 -10 +10 -200 +200 VCC = 2.7V, switch closed; TA = +25ºC VNC_ or VNO_ = -2.5V, +2.5V; or floating; VCOM_ = -2.5V, +2.5V, or TA = TMIN to TMAX floating Ω Ω nA nA Dynamic Characteristics tON Turn-On Time 1 VNO = 2.5V; for NO_, VIN_ = 0V to TA = +25ºC VCC; for NC_, VIN_ = VCC to 0V; TA = TMIN to RL = 300Ω, CL = 35pF, Figure 15 TMAX 200 100 400 400 ns tOFF Turn-Off Time VNC = 2.5V; for NO_, VIN_ = VCC TA = +25ºC to 0V; for NC_, VIN_ = 0V to VCC; TA = TMIN to RL = 300Ω, CL = 35pF, Figure 15 TMAX tD Break-Before-Make Time Delay VN_ = 2.5V, for NO_, VIN_ = VCC to 0V; for NC_, VIN_ = 0V to VCC; RL = 300Ω, CL = 35pF, Figure 16 200 ns Q Charge Injection VCOM_ = 0V, RS = 0Ω, CL = 1.0nF, Figure 17 2 pC VISO Off-Isolation VCC = 5V, f = 100kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF, Figure 18 -65 dB VCT Crosstalk VCC = 5V, f = 100kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF, Figure 18 -90 dB PSRR Power-Supply Rejection Ratio f = 10kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF 70 dB BW On-Channel-3dB Bandwidth VCC = 5V, Signal = 0dBm, RL = 50Ω, CL = 5pF, Figure 18 31 MHz THD Total Harmonic Distortion f = 20Hz to 20kHz, VCOM_ = 0.5VP-P, DC Bias = 0, RL = 32Ω 0.01 % CNO_(Off) CNC_(Off) NO_, NC_ OffCapacitance f = 1MHz, VCOM_ = 0.5VP-P, DC Bias = 0 63 pF 1 www.austriamicrosystems.com Revision 1.01 200 200 ns 4 - 13 AS1747 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s Table 3. Electrical Characteristics (Continued) Symbol Parameter CCOM_(ON) COM On-Capacitance Condition Min f = 1MHz, VCOM_ = 0.5VP-P, DC Bias = 0 Typ Max 196 Unit pF Digital I/O (IN_) VIH Input Logic High Voltage VCC = 2.7V to 3.6V 1.4 VCC = 4.2V to 5.5V 2.0 VIL Input Logic Low Voltage VCC = 2.7V to 3.6V 0.5 VCC = 4.2V to 5.5V 0.8 IIN Input Leakage Current VIN_ = 0V to VCC, VCC = 5.5V V V -1 +1 µA 1.8 5.5 V 1 µA Power Supply VCC Power-Supply Range ICC Supply Current VCC = 5.5V, VIN_ = 0V or VCC 0.01 1. Guaranteed by design www.austriamicrosystems.com Revision 1.01 5 - 13 AS1747 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 7 Typical Operating Characteristics VCC = 3.0V, TA = +25ºC (unless otherwise specified). Figure 3. ON-Resistance vs. VCOM Figure 4. ON Resistance vs. VCOM; VCC=3.0V 2 0.65 1.8 VCC = 1.8V 1.6 0.55 1.2 RON (Ω) RON ( Ω) 1.4 VCC = 2.0V 1 0.8 VCC = 2.3V 0.6 0.45 TAMB = +85°C 0.35 TAMB = +25°C VCC = 2.5V 0.4 VCC = 3.0V 0.2 TAMB = -40°C 0.25 VCC =5.0V 0 0.15 -4 -3 -2 -1 0 1 2 3 4 5 -3 -2 -1 VCOM (V) 0 1 2 3 VCOM (V) Figure 5. ON Resistance vs. VCOM; VCC=5.0V Figure 6. Charge Injection vs. VCOM; CLOAD = 1nF 200 0.65 150 100 0.55 0.45 Q (pC) R ON ( Ω) 50 0.35 TAMB = +85°C -50 -100 -150 TAMB = +25°C 0.25 0 -200 TAMB = -40°C -250 Vcc = 3.0V Vcc = 5.5V 0.15 -300 -1 0 1 2 3 4 -4 5 -2 0 VCOM (V) Figure 7. Frequency Response 6 1.5 Logic Threshold Voltage (V) ON- Response 0 -20 Loss (dB) 4 Figure 8. Logic Threshold Voltage vs. VCC 20 -40 OFF- Isolation -60 Crosstalk -80 -100 -120 0.001 2 VCOM (V) 1.4 VIN rising 1.3 VIN falling 1.2 1.1 1 0.9 0.8 0.01 0.1 1 10 100 1000 Frequency (MHz) www.austriamicrosystems.com 0 1 2 3 4 5 6 VCC (V) Revision 1.01 6 - 13 AS1747 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s Figure 9. Turn-ON/OFF vs. Temperature; VCC = 3V Figure 10. Turn-ON/OFF Times vs. VCC 250 300 tON 250 200 tON Time (ns) Time (ns) 200 150 100 150 100 tOFF 50 50 tOFF 0 -40 0 -15 10 35 60 85 1.8 2.3 2.8 3.3 Temperature (°C) Figure 11. Leakage Current vs. Temperature 4.3 4.8 5.3 Figure 12. ICC vs. VCC 100 5 80 4 60 ICC (nA) Leakage Current (nA) 3.8 VCC (V) ICOM on 40 IN = VCC 3 2 IN = GND ICOM off 20 1 0 -40 0 -15 10 35 60 85 1.8 2.3 2.8 3.3 Temperature (°C) 3.8 4.3 4.8 5.3 VCC (V) Figure 13. Total Harmonic Distortion vs. Frequency Figure 14. PSRR vs. Frequency 0.1 120 PSRR (dB) THD (%) 100 0.01 80 60 40 20 0.001 0 10 100 1000 10000 100000 Frequency (Hz) www.austriamicrosystems.com 0.1 1 10 100 Frequency (kHz) Revision 1.01 7 - 13 AS1747 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1747 operates from a +1.8V to +5.5V supply and features a negative signal capability that allows signals below ground to pass through without distortion. A break-before-make switching and a low on-resistance is also included in this analog dual SPDT switch. The device is fully specified for a 3.0V application. 9 Application Information Digital Control Inputs The logic inputs of the AS1747 accept up to +5.5V independent of the supply voltage. Due to this a mixing of the logic levels in a system is possible. For example, with a +3.3V supply, IN_ can be driven low to GND and high to +5.5V. For a +1.8V supply voltage, the logic levels are 0.5V (low) and 1.4V (high); for a +5V supply voltage, the logic levels are 0.8V (low) and 2.0V (high). Analog Signal Levels The change of the on-resistance of the AS1747 is very little for analog input signals over the whole supply voltage range. The switches are bi-directional, so the NO_, NC_, and COM_ pins can be either inputs or outputs. The AS1747 pass signals as low as VCC - 5.5V, including signals below ground with minimal distortion. Power-Supply Sequencing and Overvoltage Protection Caution: Do not exceed the absolute maximum ratings since stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying analog signals, especially if the analog signal is not current-limited. www.austriamicrosystems.com Revision 1.01 8 - 13 AS1747 Datasheet - Ti m i n g D i a g r a m s 10 Timing Diagrams Figure 15. Switching Time VCC VCC COM_ NO_ VN_ VOUT OR NC_ CL includes fixture and stray capacitance VOUT = VN_(RL / (RL + RON)) CL RL IN_ GND Logic Input tr < 5ns tf < 5ns VCC Logic Input 50% 0V IN depends on switch configuration; Input polarity determined by sense of switch. tOFF VOUT Switch Output 0.9 x VOUT 0.9 x VOUT 0V tON Figure 16. Break-Before-Make Interval VCC VCC NC_ VN_ Logic Input VOUT COM_ VCC 50% 0V NO_ CL RL IN_ GND Logic Input 0.9 x VOUT VOUT tBBM CL includes fixture and stray capacitance Figure 17. Charge Injection VCC ΔVOUT VCC VOUT RGEN NC_ COM_ VOUT OR NO_ IN OFF OFF ON + CL VGEN GND ON IN_ IN Q = (ΔVOUT)(CL) OFF Logic input waveforms inverted for switches that have the opposite logic sense. VIL to VIH www.austriamicrosystems.com OFF Revision 1.01 9 - 13 AS1747 Datasheet - Ti m i n g D i a g r a m s Figure 18. On-Loss, Off-Isolation, and Crosstalk +5V 10nF Network Analyzer VCC 0V or VCC VIN 50Ω 50Ω COM1 IN_ AS1747 NO1* NC1 50Ω VOUT MEAS REF GND 50Ω 50Ω *For crosstalk this pin is NO2. NC2 and COM2 are open. Off-Isolation = 20log Measurements are standardized against shorts at IC terminals. Off-Isolation is measured between COM_ and “OFF” NO_ or NC_ terminal on each switch. On-Loss is measured between COM_ and “ON” NO_ or NC_ terminal on each switch. Crosstalk is measured from one channel to the other channel. Signal direction through switch is reversed; worst values are recorded. www.austriamicrosystems.com Revision 1.01 VOUT ---------------VIN On-Loss = 20log VOUT ---------------VIN Crosstalk = 20log VOUT ---------------VIN 10 - 13 AS1747 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 11 Package Drawings and Markings The devices are available in 10-pin TDFN 3x3 package. Figure 19. 10-pin TDFN 3x3 Package Dimensions D2 SEE DETAIL B A D D2/2 B 2x E E2 E2/2 L aaa C PIN 1 INDEX AREA (D/2 xE/2) K PIN 1 INDEX AREA (D/2 xE/2) N N-1 aaa C 2x e TOP VIEW e (ND-1) X e b ddd bbb C C A B BTM VIEW Terminal Tip DETAIL B A3 ccc C A C SEATING PLANE 0.08 C A1 SIDE VIEW Datum A or B ODD TERMINAL SIDE Symbol A A1 A3 θ aaa bbb ccc ddd eee ggg Min 0.70 0.00 0º Nom 0.75 0.02 0.20 REF --0.15 0.10 0.10 0.05 0.08 0.10 Max 0.80 0.05 Symbol D BSC E BSC D2 E2 L K b e N ND 14º Min 2.20 1.40 0.30 0.20 0.18 Nom 3.00 3.00 ----0.40 --0.25 0.50 10 5 Max 2.70 1.75 0.50 --0.30 Notes: 1. 2. 3. 4. 5. Figure 19 is shown for illustration only. Dimensioning and tolerancing conform to ASME Y14.5M-1994. All dimensions are in millimeters, angle is in degrees. N is the total number of terminals. ND refers to the maximum number of terminals on D side. www.austriamicrosystems.com Revision 1.01 11 - 13 AS1747 Datasheet - O r d e r i n g I n f o r m a t i o n 12 Ordering Information The devices are available as the standard products shown in Table 4. Table 4. Ordering Information Model AS1747-BTDT Description Delivery Form Dual 0.6Ohm SPDT, Audio Clickless Switch with Negative Rail Capability Tape & Reel Package 10-pin TDFN (3.0mm x 3.0mm) Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect For further information and requests, please contact us mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com Revision 1.01 12 - 13 AS1747 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com Revision 1.01 13 - 13