HV238 Initial Release 16 Channel High Voltage Analog Switch With Bleed Resistors Features ! ! ! ! ! ! ! ! ! ! Description HVCMOS technology for high performance 220V operating conditions Output On-resistance typically 22Ω Integrated bleed resistors on the outputs 5.0V and 12.0V CMOS logic compatibility Very low quiescent power dissipation -10µA -45dB min off isolation at 7.5MHz Low parasitic capacitance Excellent noise immunity Flexible operating supply voltages The Supertex HV238 is a 220V 16-channel high voltage analog switch integrated circuit (IC) with output bleed resistors (RINT). The output switches are configured as 2 sets of 8 single pole single throw analog switches. It is intended to be used in applications requiring high voltage switching controlled by low voltage control signals such as ultrasound imaging. The 2 sets of 8 analog switches are controlled by 2 input logic controls, DIN1 and DIN2. A logic high on DIN1 will turn ON switches 0 to 7 and a logic high on DIN2 will turn ON switches 8 to 15. The bleed resistors help to significantly reduce voltage built up on capacitive loads such as piezoelectric transducers connected to the outputs. Applications ! ! Medical ultrasound imaging Non-destructive evaluation Block Diagram VDD DIN 1 SW0 Latch 1 Level Translator 1 SW0 SW7 SW7 VDD SW8 DIN 2 LE Latch 2 Level Translator 2 SW8 GND VPP SW15 VNN SW15 RGND NR070805 1 HV238 Ordering Information Package Options Device 48-lead TQFP HV238 HV238FG Absolute Maximum Ratings* VDD Logic supply -0.5V to +15V VPP-VNN differential supply 225V VPP Positive supply -0.5V to VNN+225V VNN Negative supply +0.5V to –225V Logic input voltage -0.5V to VDD +0.3V Analog signal range VNN to VPP Peak analog signal current/channel 3.0A Storage temperature Power dissipation -65°C to 150°C 48-lead TQFP 1.0W *Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. Operating Conditions* Symbol Parameter Value VPP Positive high voltage supply 50V to 110V VNN Negative high voltage supply -10V to VPP –220V VDD Logic power supply voltage VIH High level input voltage VDD -1.0V to VDD VIL Low level input voltage 0V to 1.0V VSIG Analog signal voltage peak-to-peak TA 4.75V to 12.6V VNN+10V to VPP-10V Operating free air temperature 0°C to 70°C * Notes: 1 Power up/down sequence is arbitrary except GND must be powered-up first and powered-down last. 2 VSIG must be within VNN and VPP or floating during power up/down transition. 3 Rise and fall times of power supplies VDD, VPP, and VNN should not be less than 1.0msec. Truth Table DIN2 DIN1 LE SW0 to SW7 SW8 to SW15 L L L OFF OFF L H L ON OFF H L L OFF ON H H L ON ON X X H Hold Previous State NR070805 2 HV238 Electrical Characteristics DC Characteristics (over recommended operating conditions unless otherwise noted) Sym RONS ∆RONS RONL RINT ISOL IPPQ INNQ IPPQ INNQ fSW IPP INN IPP INN IDDQ IDD CIN Parameter Small Signal Switch On-Resistance Small Signal Switch On-Resistance Matching Large Signal Switch On-Resistance Output Switch Shunt Resistance Switch Off Leakage per Switch DC offset Switch off DC offset Switch on Quiescent VPP supply current Quiescent VNN supply current Quiescent VPP supply current Quiescent VNN supply current Switch output peak current Output switch frequency Average VPP supply current Average VNN supply current Average VPP supply current Average VNN supply current Quiescent VDD supply current Average VDD supply current Logic input capacitance 0°C Min Max Min +25°C Typ Max +70°C Min Max 30 26 32 40 25 22 27 35 15 22 27 30 20 18 22 25 20 5.0 20 20 15 20 Units Conditions Ω VSIG = 0V, ISIG = 5mA, VPP = 50V, VNN = -170V VSIG = 0V, ISIG = 200mA, VPP = 50V, VNN = -170V VSIG = 0V, ISIG = 5mA, VPP = 110V, VNN = -110V VSIG = 0V, ISIG = 200mA, VPP = 110V, VNN = -110V % VSIG = 0V, ISIG = 5mA, VPP = 110V, VNN = -110V Ω VSIG = 0V, ISIG = 1.0A Output Switch to RGND IRINT = 0.5mA VSIG = VPP-10V and VNN = +10V 35 50 5.0 1.0 10 15 µA 300 100 300 300 mV No Load 500 100 500 500 mV No Load 10 50 µA All switches off -10 -50 µA All switches off 10 50 µA All switches on, ISW = 5mA -10 -50 µA All switches on, ISW = 5mA 3.0 2.0 A VSIG duty cycle < 0.1% 3.0 KΩ 2.0 50 6.5 8.8 kHz Duty cycle=50% mA VPP = 50V, VNN = -170V, All Switches turning ON and OFF at 50kHz mA VPP = 110V, VNN = -110V, All Switches turning ON and OFF at 50kHz All logic inputs are static 10 8.1 -8.8 -10 -8.1 6.3 6.9 5.0 -6.3 -6.9 10 10 10 µA 2.0 2.0 2.0 mA 10 10 10 pF DIN1 = DIN2 = 3MHz, LE = high NR070805 3 HV238 Electrical Characteristics AC Characteristics (over recommended operating conditions unless otherwise noted) Time Width of LE 0°C Min Max 150 Min 150 Time Width of DIN 150 150 150 ns 150 150 150 ns Sym Parameter tWLE tWDIN Set Up Time tSD Before LE Rises +25°C Typ Max +70°C Min Max 150 Units ns TON Turn On Time 2.0 2.0 2.0 µs TOFF Turn Off Time 2.0 2.0 2.0 µs dv/dt Maximum VSIG Slew Rate 20 20 20 V/ns KO -30 -30 -33 -30 -45 -45 -50 -45 -45 -45 Off Isolation KCR dB Switch Crosstalk IID CSG(OFF) CSG(ON) +VSPK Output Switch Isolation Diode Current Off Capacitance Switch to Gnd On Capacitance Swithc to Gnd 300 dB VSIG = VPP-10V, RLOAD = 10KΩ VSIG = VPP-10V, RLOAD = 10KΩ F = 5MHz, Load = 1KΩ//15pF F = 7.5MHz, RLOAD = 50Ω F = 5.0MHz, RLOAD = 50Ω 300 mA 300ns pulse width, 2.0% duty cycle 5.0 17 5.0 12 17 5.0 17 pF VSIG = 0V, f = 1.0MHz 25 50 25 38 50 25 50 pF VSIG = 0V, f = 1.0MHz V RLOAD = 50Ω 4.0 Output Voltage Spike -VSPK -45 300 Conditions -4.0 Logic Timing Diagram VDD DIN 50% 0V VDD LE tsd tWLE 50% 50% 50% 0V ON 90% SW 10% OFF TOFF TON NR070805 4 HV238 Test Circuits VPP-10V RL VPP-10V and VNN+10V VOUT RINT RINT 10KΩ VOUT VOUT RINT RGND RINT RINT RGND VPP VPP VDD VNN VNN GND ISOL = 5.0V RGND VPP VPP VDD VNN VNN GND VOUT RINT RINT 5.0V VPP VPP VDD VNN VNN GND DC Offset ON/OFF 5.0V TON/TOFF Switch OFF Leakage VOUT VOUT RINT VIN=10VP-P @ 5.0MHz RINT NC VIN=10VP-P @ 5.0MHz RLOAD 50Ω RINT RGND 50Ω RINT RGND VPP VPP VDD VNN VNN GND KO = 20Log VOUT VIN 5.0V VPP VPP VDD VNN VNN GND KCR = 20Log Off Isolation 5.0V VOUT VIN Crosstalk +VSPK VOUT VSIG ∆VOUT VSIG IID VNN RINT RINT RINT 1KΩ RINT 50Ω -VSPK RGND RGND VPP VPP VDD VNN VNN GND Isolation Diode Current 5.0V VOUT RINT RINT 1000pF RGND VPP VPP VDD VNN VNN GND 5.0V Output Voltage Spike VPP VPP VDD VNN VNN GND 5.0V Q = 1000pF x ∆VOUT Charge Injection NR070805 5 HV238 Pin Configurations 48-lead TQFP Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Function VNN N/C VPP N/C DIN1 LE DIN2 N/C N/C VDD GND N/C RGND SW15 SW15 SW14 SW14 SW13 SW13 SW12 SW12 SW11 SW11 N/C Pin 25 26 27 28 29 30 Function SW10 SW10 SW9 SW9 SW8 SW8 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 SW7 SW7 SW6 SW6 SW5 SW5 SW4 N/C SW4 N/C SW3 SW3 SW2 SW2 SW1 SW1 SW0 SW0 48 37 1 36 48 Lead TQFP (top view) 12 25 13 24 48-lead TQFP Package Dimensions 0.354 ± 0.010 (8.992 ± 0.254) 0.024 ± 0.008 (0.610 ± 0.2032) 0.354 ± 0.010 (8.992 ± 0.254) Pin #1 0.275 ± 0.004 (6.985 ± 0.102) 0.275 ± 0.004 (6.985 ± 0.1016) Measurement Legend = Dimensions in Inches (Dimensions in Millimeters) 0° - 7° 0.059 ± 0.004 (1.4986 ± 0.102) 0.055 ± 0.004 (1.397 ± 0.102) 0.020 BSC (0.508) 0.039 TYP. (0.991) NR070805 NR070805 6