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| HV238 Initial Release 16 Channel High Voltage Analog Switch With Bleed Resistors Features ! ! ! ! ! ! ! ! ! ! Description 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. HVCMOS technology for high performance 220V operating conditions Output On-resistance typically 22 Integrated bleed resistors on the outputs 5.0V and 12.0V CMOS logic compatibility Very low quiescent power dissipation -10A -45dB min off isolation at 7.5MHz Low parasitic capacitance Excellent noise immunity Flexible operating supply voltages Applications ! ! Medical ultrasound imaging Non-destructive evaluation Block Diagram VDD DIN 1 Latch 1 Level Translator 1 SW0 SW0 SW7 VDD DIN 2 LE GND VPP VNN Latch 2 Level Translator 2 SW7 SW8 SW8 SW15 SW15 RGND NR070805 1 HV238 Ordering Information Device HV238 Package Options 48-lead TQFP HV238FG Absolute Maximum Ratings* VDD Logic supply VPP-VNN differential supply VPP Positive supply VNN Negative supply Logic input voltage Analog signal range Peak analog signal current/channel Storage temperature Power dissipation 48-lead TQFP -0.5V to +15V 225V -0.5V to VNN+225V +0.5V to -225V -0.5V to VDD +0.3V VNN to VPP 3.0A -65C to 150C 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 VPP VNN VDD VIH VIL VSIG TA Parameter Positive high voltage supply Negative high voltage supply Logic power supply voltage High level input voltage Low level input voltage Analog signal voltage peak-to-peak Operating free air temperature Value 50V to 110V -10V to VPP -220V 4.75V to 12.6V VDD -1.0V to VDD 0V to 1.0V VNN+10V to VPP-10V 0C to 70C * 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 L L H H X DIN1 L H L H X LE SW0 to SW7 OFF ON OFF ON SW8 to SW15 OFF OFF ON ON L L L L H Hold Previous State NR070805 2 HV238 Electrical Characteristics DC Characteristics (over recommended operating conditions unless otherwise noted) Sym Parameter 0C Min Max 30 Min +25C Typ Max 26 22 22 18 5.0 15 32 27 27 22 20 +70C Min Max 40 35 30 25 20 Units Conditions 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 VSIG = 0V, ISIG = 1.0A Output Switch to RGND IRINT = 0.5mA VSIG = VPP-10V and VNN = +10V No Load No Load All switches off All switches off All switches on, ISW = 5mA All switches on, ISW = 5mA VSIG duty cycle < 0.1% Duty cycle=50% VPP = 50V, VNN = -170V, All Switches turning ON and OFF at 50kHz VPP = 110V, VNN = -110V, All Switches turning ON and OFF at 50kHz All logic inputs are static DIN1 = DIN2 = 3MHz, LE = high RONS Small Signal Switch On-Resistance 25 15 20 RONS RONL RINT ISOL IPPQ INNQ IPPQ INNQ fSW IPP INN IPP INN IDDQ IDD CIN 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 20 % 20 5.0 300 500 35 1.0 100 100 10 -10 10 -10 50 10 300 500 50 -50 50 -50 2.0 50 2.0 15 300 500 K A mV mV A A A A A kHz 10 mA -10 6.9 mA -6.9 10 2.0 10 A mA pF 3.0 3.0 6.5 8.1 -8.1 5.0 10 2.0 10 8.8 -8.8 6.3 -6.3 10 2.0 10 NR070805 3 HV238 Electrical Characteristics AC Characteristics (over recommended operating conditions unless otherwise noted) Sym tWLE tWDIN tSD TON TOFF dv/dt KO Parameter Time Width of LE Time Width of DIN Set Up Time Before LE Rises Turn On Time Turn Off Time Maximum VSIG Slew Rate -30 Off Isolation -45 KCR IID CSG(OFF) CSG(ON) +VSPK -VSPK Switch Crosstalk Output Switch Isolation Diode Current Off Capacitance Switch to Gnd On Capacitance Swithc to Gnd Output Voltage Spike -45 300 5.0 25 17 50 5.0 25 12 38 4.0 -4.0 -45 -45 300 17 50 5.0 25 -50 -45 -45 300 17 50 dB mA pF pF V 0C Min Max 150 150 150 2.0 2.0 20 -30 -33 Min 150 150 150 2.0 2.0 20 -30 dB +25C Typ Max +70C Min Max 150 150 150 2.0 2.0 20 Units ns ns ns s s V/ns F = 5MHz, Load = 1K//15pF F = 7.5MHz, RLOAD = 50 F = 5.0MHz, RLOAD = 50 300ns pulse width, 2.0% duty cycle VSIG = 0V, f = 1.0MHz VSIG = 0V, f = 1.0MHz RLOAD = 50 VSIG = VPP-10V, RLOAD = 10K VSIG = VPP-10V, RLOAD = 10K Conditions Logic Timing Diagram VDD DIN 0V VDD LE 0V ON SW OFF TON 10% 90% 50% tsd 50% 50% tWLE 50% TOFF NR070805 4 HV238 Test Circuits VPP-10V RL VPP-10V and VNN+10V VOUT RINT RINT 10K VOUT RINT RINT VOUT RINT RINT RGND VPP VNN VPP VNN VDD GND 5.0V VPP VNN RGND VPP VNN VDD GND 5.0V VPP VNN RGND VPP VNN VDD GND 5.0V ISOL = VOUT RINT DC Offset ON/OFF TON/TOFF Switch OFF Leakage VOUT VOUT VIN=10VP-P @ 5.0MHz RINT RINT RLOAD VIN=10VP-P @ 5.0MHz NC 50 RINT RINT 50 RGND VPP VNN VPP VNN VDD GND 5.0V RGND VPP VNN VPP VNN VDD GND VOUT VIN 5.0V KO = 20Log VOUT VIN KCR = 20Log Off Isolation Crosstalk VSIG IID VNN RINT RINT +VSPK VOUT VSIG 1K RINT RINT VOUT VOUT RINT RINT 50 -VSPK 1000pF RGND VPP VNN VPP VNN VDD GND 5.0V VPP VNN RGND VPP VNN VDD GND 5.0V VPP VNN RGND VPP VNN VDD GND 5.0V Isolation Diode Current Output Voltage Spike 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 Pin 25 26 27 28 29 30 Function SW10 SW10 SW9 SW9 SW8 SW8 48 1 37 36 LE DIN2 N/C N/C VDD GND N/C RGND SW15 SW15 SW14 SW14 SW13 SW13 SW12 SW12 SW11 SW11 N/C 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 Lead TQFP (top view) 12 13 24 25 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) 0.275 0.004 (6.985 0.102) Pin #1 Measurement Legend = Dimensions in Inches (Dimensions in Millimeters) 0.275 0.004 (6.985 0.1016) 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 |
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