MAX4936MAX4939 19-5541 Rev 1 3/11 Octal High-Voltage Transmit/Receive Switches General Description Features The MAX4936MAX4939 are octal, high-voltage, transmit/ S Low Power: Low Impedance (5) with 1.5mA Bias receive (T/R) switches. The T/R switches are based on Current Only a diode bridge topology, and the amount of current S Low Noise < 0.5nV/Hz (typ) with 1.5mA Bias in the diode bridges can be programmed through an Current Only SPIK interface. All devices feature a latch-clear input S Wide -3dB Bandwidth 65MHz (typ) to asynchronously turn off all T/R switches and put the S Easy Programming with SPI Interface device into a low-power shutdown mode. The MAX4936/ MAX4938 include the T/R switch and grass-clipping S High Density (8 Channels per Package) diodes, performing both transmit and receive operations. S Grass-Clipping Diodes with Low-Voltage Isolation The MAX4937/MAX4939 include just the T/R switch and (MAX4936/MAX4938) perform the receive operation only. S Output Clamp Diodes for Receiver Protection The MAX4936/MAX4938 transmit path is low impedance (MAX4936/MAX4937) during high-voltage transmit and high impedance during S Global Shutdown Control (CLR) low-voltage receive, providing isolation between transmit and receive circuitry. The high-voltage transmit path is S Each T/R Switch Can Be Individually Programmed high bandwidth, low distortion, and low jitter. On or Off The receive path for all devices is low impedance dur- S Low-Voltage Receive Path with High-Voltage ing low-voltage receive and high impedance during Protection high-voltage transmit, providing protection to the receive S Space-Saving, 5mm x 11mm, 56-Pin TQFN Package circuitry. The low-voltage receive path is high bandwidth, low noise, low distortion, and low jitter. Each T/R switch Applications can be individually programmed on or off, allowing these Medical/Industrial Imaging devices to also be used as receive path multiplexers. Ultrasound The MAX4936/MAX4937 feature clamping diodes to protect the receiver input from voltage spikes due to High-Voltage Transmit and Low-Voltage Isolation leakage currents flowing through the T/R switches dur- ing transmission. The MAX4938/MAX4939 do not have clamping diodes and rely on clamping diodes integrated in the receiver front end. All devices are available in a small, 56-pin, 5mm x 11mm TQFN package, and are specified over the commercial 0NC to +70NC temperature range. Ordering Information/Selector Guide LOW-VOLTAGE HIGH-VOLTAGE PART OUTPUT CLAMP TEMP RANGE PIN-PACKAGE ISOLATION PROTECTION MAX4936CTN+ Yes Yes Yes 0NC to +70NC 56 TQFN-EP* MAX4937CTN+ No Yes Yes 0NC to +70NC 56 TQFN-EP* MAX4938CTN+** Yes Yes No 0NC to +70NC 56 TQFN-EP* MAX4939CTN+** No Yes No 0NC to +70NC 56 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. **Future productcontact factory for availability. SPI is a trademark of Motorola, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Octal High-Voltage Transmit/Receive Switches ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) Voltage Difference Across Any or All COM ..................Q230V V Positive Supply Voltage ...................................-0.3V to +6V Continuous Current (HV to COM ) (MAX4936/MAX4938) ..Q250mA DD V , LVCC Positive Supply Voltage ....................-0.3V to +6V Continuous Current (Any Other Terminal) .....................Q100mA CC V , LVEE Negative Supply Voltage ....................-6V to +0.3V Peak Current (HV to COM ) (MAX4936/MAX4938) EE CLK, DIN, CLR, LE Input Voltage ..........................-0.3V to +6V (Pulsed at 1ms, 0.1% Duty Cycle) ................................Q2.5A DOUT Output Voltage ..............................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70NC) DD A HV Input Voltage (MAX4936/MAX4938) ..........-120V to +120V TQFN (derate 41.0mW/NC above +70NC) .................3279mW COM Input/Output Voltage ...............................-120V to +120V Operating Temperature Range ............................. 0NC to +70NC NO Output Voltage (MAX4936/MAX4937) ......................Q1.5V Storage Temperature Range ............................ -65NC to +150NC NO Output Voltage (MAX4938/MAX4939) .........................Q6V Junction Temperature ................................................... +150NC Voltage Difference Across Any or Lead Temperature (soldering, 10s) ................................+300NC All HV (MAX4936/MAX4938) ......................................Q230V Soldering Temperature (reflow) ......................................+260NC Stresses beyond those listed under Absolute Maximum Ratings 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 the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL CHARACTERISTICS (Note 1) TQFN Junction-to-Ambient Thermal Resistance (q ) ...........44C/W JA Junction-to-Case Thermal Resistance (q ) .................10C/W JC Note 1: Package thermal resistance were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (V = +1.62V to +5.5V, V = +2.7V to +5.5V, V = -2.7V to -5.5V, V = 0V, LVCC = V , LVEE = V , T = T to T , DD CC EE CLR CC EE A MIN MAX unless otherwise noted. Typical values are at T = +25NC.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC CHARACTERISTICS HV Input Voltage Range V MAX4936/MAX4938 only -115 +115 V IRHV Difference Across Any or All MAX4936/MAX4938 only 220 V HV V R +2V, I = Q100mA (MAX4936/ V V Q V HV HV HV HV HV COM Output Voltage Range V V ORCM MAX4938 only) - 1 0.85 + 1 COM Input Voltage Range V -115 +115 V IRCM Difference Across Any or All 220 V COM V = +5V, V = -5V, V R +2V, CC EE COM R = 200I, C = 30pF, I = 10mA -1 Q0.75 +1 L L CH (MAX4936/MAX4937 only) NO Output Voltage Range V V ORNO V = +5V, V = -5V, V < +0.4V, V V V CC EE COM COM COM COM R = 200I, C = 30pF, I = 1.5mA - 0.2 Q 0.1 + 0.2 L L CH HV to COM Continuous I V = 0V (MAX4936/MAX4938 only) -200 +200 mA CN COM Current V = 0V, I = Q2A COM CN HV to COM Drop V Q2 V CN (MAX4936/MAX4938 only) V = +5V, V = -5V, COM = unconnected, CC EE Diode Bridge Voltage Offset V -200 +200 mV OFF NO = unconnected, I = 1.5mA CH 2 MAX4936MAX4939