AS1746

Da t as heet AS1746 0 . 5 / 0 . 6 Ω, L o w - Vo l ta g e , D u a l S P D T A n a l o g S w i t c h 1 General Description The AS1746 is a low on-resistance (RON), low-voltage, dual-single-pole/double-throw (SPDT) analog switch designed to operate from a single +1.8 to +5.5V supply. The device features a 0.5Ω (max) RON for normally closed (NC) switches and a 0.6Ω (max) RON for normally open (NO) switches using a +2.7V supply. The AS1746 features break-before-make switching (2ns) with tON = 50ns and tOFF = 30ns (using a +2.7V supply). The digital logic inputs are 1.8V logic-compatible with +2.7 to +3.3V supplies. The AS1746 is available in a TDFN-10 (3x3mm) package and a WL-CSP-10 package. 2 Key Features ! ! ! ! ! ! ! ! ! ! ! ! ! Single Supply Operation: +1.8V to +5.5V Normally Closed Switch RON: 0.45Ω (+2.7V Supply) Normally Open Switch RON: 0.55Ω (+2.7V Supply) RON Matching Between Channels: 0.06Ω RON Flatness Over Signal Range: 0.15Ω Supply Current: 50nA Rail-to-Rail Signal Handling 1.8V Logic Compatibility Low Crosstalk: -60dB (100kHz) High Off-Isolation: -64dB (100kHz) Total Harmonic Distortion: 0.025% Ultra-Low Leakage Currents: 1nA (@ TAMB = +25ºC) Package Types: - TDFN-10 (3x3mm) - WL-CSP-10 3 Applications The device is ideal for audio headsets, MP3 players, power routing switches, relay replacements, audio and video signal routing, communications circuits, PCMCIA cards, mobile phones, MODEMs, and any battery-operated equipment. Figure 1. AS1746 - Block Diagram AS1746 V+ 1 NO1 2 COM1 3 IN1 4 NC1 5 10 NO2 Truth Table 9 COM2 8 IN2 7 NC2 6 GND IN Low High NOx to COM Off On NCx to COM On Off Switch shown for logic low input. www.austriamicrosystems.com Revision 1.03 1 - 15 AS1746 Datasheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments (Top View) GND V+ 1 NO1 2 COM1 3 IN1 4 NC1 5 TDFN-10 (3x3mm) 10 NO2 9 COM2 IN1 C2 A2 IN2 NC1 C1 B1 A1 NC2 AS1746 8 IN2 7 NC2 6 GND COM1 C3 AS1746 A3 COM2 NO1 C4 B4 V+ WL-CSP-10 A4 NO2 Pin Descriptions Table 1. Pin Descriptions Pin Number Pin Name V+ NO1 COM1 IN1 NC1 GND NC2 IN2 COM2 NO2 Description Positive Input Supply Voltage Normally Open Analog Switch 1 Analog Switch 1 Common Switch 1 Digital Input Normally Closed Analog Switch 1 Ground Normally Closed Analog Switch 2 Switch 2 Digital Input Analog Switch 2 Common Normally Open Analog Switch 2 See Figure 2 www.austriamicrosystems.com Revision 1.03 2 - 15 AS1746 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 V+, INx to GND COMx, NOx, NCx, to GND COMx, NOx, NCx Continuous Current COMx, NOx, NCx Peak Current COMx, NOx, NCx Peak Current Continuous Power Dissipation Electro-Static Discharge Latchup Immunity Operating Ambient Temperature Range Storage Temperature Range -40 -65 2.5 250 +85 +150 Min -0.3 -0.3 Max +7 V+ + 0.3 +300 +400 +500 444 Units V V COMx, NOx, NCx signals exceeding V+ or GND are internally clamped by diodes and forwarddiode current must be limited to the maximum current rating. Comments -300 -400 -500 mA mA mA mW kV mA ºC ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020D “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). Pulsed at 50% duty cycle Pulsed at 10% duty cycle TAMB = +70ºC HBM Mil-Std883E 3015.7 methods Class II, Level A Package Body Temperature +260 ºC www.austriamicrosystems.com Revision 1.03 3 - 15 AS1746 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 (V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TAMB = -40°C to +85°C (unless otherwise specified). Typical values are at +3V and +25°C. Table 3. Electrical Characteristics Symbol Analog Switch VNOx, VNCx, VCOMx Analog Signal Range V+ = 2.7V, ICOMx = 100mA, VNCx = 0 to V+, TAMB = 25°C V+ = 2.7V, ICOMx = 100mA, VNCx = 0 to V+ V+ = 2.7V, ICOMx = 100mA, VNOx = 0 to V+, TAMB = 25°C V+ = 2.7V, ICOMx = 100mA, VNOx = 0 to V+ V+ = 2.7V, ICOMx = 100mA, VNCx/VNOx = 1.5V V+ = 2.7V, ICOMx = 100mA, VNCx = 0 to V+ V+ = 2.7V, ICOMx = 100mA, VNOx = 0 to V+ V+ = 3.3V, VNOx/VNCx = 3V, 0.3V, VCOMx = 0.3V, 3V, TAMB = 25°C V+ = 3.3V, VNOx/VNCx = 3V, 0.3V, VCOMx = 0.3V, 3V V+ = 3.3V, VNOx/VNCx = 3V, 0.3V or float, VCOMx = 3V, 0.3V, or float, TAMB = 25°C V+ = 3.3V, VNOx/VNCx = 3V, 0.3V or float, VCOMx = 3V, 0.3V, or float V+ = 2.7V, VNOx/VNCx = 1.5V, RLOAD = 50Ω, CLOAD = 35pF, TAMB = 25°C V+ = 2.7V, VNOx/VNCx = 1.5V, RLOAD = 50Ω, CLOAD = 35pF (see Figure 17 on page 10) V+ = 2.7V, VNOx/VNCx = 1.5V, RLOAD = 50Ω, CLOAD = 35pF, TAMB = 25°C V+ = 2.7V, VNOx/VNCx = 1.5V, RLOAD = 50Ω, CLOAD = 35pF (see Figure 17 on page 10) V+ = 2.7V, VNOx/VNCx = 1.5V, RLOAD = 50Ω, CLOAD = 35pF (see Figure 18 on page 10) COMx = 0, RS = 0, CLOAD = 1nF (see Figure 19 on page 10) 2 15 200 20 -1 -10 -2 -30 0.02 0.06 0.1 0.35 0 0.3 V+ 0.45 Ω 0.5 0.55 Ω 0.6 0.06 0.15 0.35 1 10 2 30 Ω Ω Ω nA nA nA nA V Parameter 1 Condition Min Typ Max Unit RON(NC) NCx On-Resistance RON(NO) NOx On-Resistance ΔRON RFLAT(NC) RFLAT(NO) On-Resistance Match 2 Between Channels NCx On-Resistance 3 Flatness NOx On-Resistance 3 Flatness NCx or NOx Off4 Leakage Current INOxOFF/ INCxOFF ICOMxON COMx On-Leakage 4 Current Dynamic Characteristics 30 50 ns 60 tON Turn On Time 5 30 ns 35 tOFF Turn Off Time 5 tBBM Q Break-Before-Make 5 Delay Charge Injection ns pC www.austriamicrosystems.com Revision 1.03 4 - 15 AS1746 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 VISO Parameter Off-Isolation 1 Condition VCOMx = 1VRMS, RLOAD = 50Ω, CLOAD = 5pF, f = 100kHz (see Figure 20 on page 11) VCOMx = 1VRMS, RLOAD = 50Ω, CLOAD = 5pF, f = 100kHz (see Figure 20 on page 11) RLOAD = 600Ω, INx = 2VP-P, f = 20Hz to 20kHz f = 1MHz (see Figure 21 on page 11) f = 1MHz (see Figure 21 on page 11) f = 1MHz (see Figure 21 on page 11) f = 1MHz (see Figure 21 on page 11) Min Typ -64 Max Unit dB 6 VXT THD CNCXOFF CNOXOFF CNCXON CNOXON Digital I/O VIH VIL IINx Power Supply V+ I+ Crosstalk Total Harmonic Distortion NCx Off-Capacitance NOx Off-Capacitance NCx On-Capacitance NOx On-Capacitance Input Logic High Input Logic Low INx Input Leakage Current -60 0.025 84 37 190 150 1.4 0.5 dB % pF pF pF pF V V µA VINx = 0 or V+ -1 1 Power Supply Range V+ = 5.5V; VINx = 0 or V+, TAMB = 25°C Supply Current V+ = 5.5V; VINx = 0 or V+ 1.8 -50 -350 5.5 50 350 V nA 1. The algebraic convention used in this data sheet is such that the most negative value is the minimum and the most positive value is the maximum. 2. ΔRON = RON(MAX) - RON(MIN) between pins NC1 and NC2 or between pins NO1 and NO2. 3. Flatness is defined as the difference between the maximum and minimum value of RON as measured over the specified analog signal ranges. 4. 100% tested. 5. Guaranteed by design. 6. Off-isolation = 20LOG10 (VCOM/VNO), VCOM = output, VNO = input to off switch. www.austriamicrosystems.com Revision 1.03 5 - 15 AS1746 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 TAMB = +25ºC. Values measured in TDFN-10 (3x3mm) package. Figure 3. NC ON-Resistance vs. VCOM 0.7 VDD = 1.8V Figure 4. NO ON-Resistance vs. VCOM 1.1 1.0 0.9 VDD = 1.8V 0.6 R ON (Ω) . 0.5 R ON (Ω) . VDD = 2.0V 0.8 0.7 0.6 0.5 0.4 0.3 VDD = 2.3V VDD = 2.5V VDD = 3.0V VDD =5.0V VDD = 2.0V 0.4 0.3 VDD = 2.3V VDD = 2.5V VDD = 3.0V VDD =5.0V 0.2 0 1 2 3 4 5 0.2 0 1 2 3 4 5 VCOM (V) VCOM (V) Figure 5. NC ON-Resistance vs. VCOM, 5V 0.45 0.40 0.35 TAMB = +85°C Figure 6. NO ON-Resistance vs. VCOM, 5V 0.45 0.40 0.35 0.30 0.25 TAMB = +25°C TAMB = +85°C R ON (Ω) . 0.30 0.25 TAMB = +25°C 0.20 TAMB = -40°C R ON (Ω) . 0.20 TAMB = -40°C 0.15 0 1 2 3 4 5 0.15 0 1 2 3 4 5 VCOM (V) VCOM (V) Figure 7. NC ON-Resistance vs. VCOM, 3V 0.45 0.40 0.35 0.30 TAMB = +25°C Figure 8. NO ON-Resistance vs. VCOM, 3V 0.50 0.45 TAMB = +85°C TAMB = +85°C 0.40 R ON (Ω) . R ON (Ω) . 0.35 0.30 0.25 TAMB = +25°C 0.25 0.20 0.15 0 0.5 1 1.5 2 2.5 3 TAMB = -40°C TAMB = -40°C 0.20 0.15 0 0.5 1 1.5 2 2.5 3 VCOM (V) VCOM (V) www.austriamicrosystems.com Revision 1.03 6 - 15 AS1746 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, VDD = 3V 35 NC Figure 10. Turn-ON/OFF Times vs. VSupply 90 80 30 tON 70 tON /tOFF (ns) . tON /tOFF (ns) . NO 60 50 40 tON 25 20 NO tOFF 30 20 10 tOFF 15 NC 10 -40 0 -15 10 35 60 85 1.5 2.5 3.5 4.5 5.5 Temperature (°C) VSupply (V) Figure 11. Logic Threshold Voltage vs. Supply Voltage 1.5 Figure 12. Charge Injection vs. COM Voltage 350 300 250 Logic Threshold Voltage (V) . VIN rising 1 200 Q (pC) . 5 6 VIN falling 150 100 50 0 -50 -100 0.5 0 0 1 2 3 4 -150 0 1 2 3 4 5 6 Supply Voltage (V) VCOM (V) Figure 13. Frequency Response 0 ON- Response Figure 14. THD+N vs. Frequency 0.05 -20 0.04 -40 THD+N (%) . 1000 Loss (dB) . Crosstalk OFF- Isolation 0.03 -60 0.02 -80 0.01 -100 0.001 0 0.1 10 10 1000 100000 Frequency (MHz) Frequency (Hz) www.austriamicrosystems.com Revision 1.03 7 - 15 AS1746 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1746 is a low on-resistance, low-voltage, asymmetrical dual-SPDT analog switch designed to operate from a single +1.8 to +5.5V supply. The device is fully specified for nominal 3V applications and features break-before-make switching and fast switching speeds (tON = 60ns max, tOFF = 35ns max). The device provides 0.5Ω (max) RON for its NC switch, and 0.6Ω (max) RON for its NO switch for applications that require asymmetrical loads. Figure 15. AS1746 - Block Diagram – WL-CSP-10 AS1746 GND NC1 C1 B1 A1 NC2 IN1 C2 A2 IN2 COM1 C3 A3 COM2 NO1 C4 B4 V+ A4 NO2 www.austriamicrosystems.com Revision 1.03 8 - 15 AS1746 Datasheet - A p p l i c a t i o n I n f o r m a t i o n 9 Application Information Digital Control Inputs The AS1746 logic inputs can handle up to +5.5V regardless of the supply voltage. For example, with a +3.3V supply, INx may be driven low to GND and high to 5.5V. Driving INx rail-to-rail minimizes power consumption. Analog Signal Levels Analog signals that range over the entire supply voltage (V+ to GND) are passed with very little change in RON (see Typical Operating Characteristics on page 6). The switches are bi-directional, so the NOx, NCx, and COMx pins can be used as inputs or outputs. Power Supply Sequencing Proper power supply sequencing is recommended for all CMOS devices. The recommended sequence is as follows: 1. V+ 2. NOx, NCx, COMx Always apply V+ before applying analog signals, especially if the analog signal is not current limited. If this sequencing is not possible, and if the analog inputs are not current limited to