MAX4940/MAX4940A 19-4591 Rev 0 4/09 Dual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers General Description Features The MAX4940/MAX4940A integrated circuits generate S High-Density Quad-Channel Pulser in One high-voltage, high-frequency, unipolar or bipolar pulses Package from low-voltage logic inputs. These quad/dual pulsers S 0 to +220V Unipolar or Q110V Bipolar Outputs feature independent logic inputs, independent high-volt- S 8.5I (typ) Output Impedance and 2.0A (typ) age pulser outputs with active clamps and independent Output Current high-voltage supply inputs. S 21I (typ) Always-On Active Clamp with Integrated The MAX4940/MAX4940A feature quad, high-voltage puls- Blocking Diodes ers with 8.5I output impedance for the high-voltage S Integrated Output Diodes (MAX4940A Only) outputs and a 21I impedance for the active clamp. The high-voltage outputs can provide 2.0A (typ) output current. S No Special Power-Supply Sequencing Required for Trilevel Applications All devices use two logic inputs per channel to con- trol the positive and negative pulses. The MAX4940/ S Matched Rise/Fall Times and Matched MAX4940A have a dedicated input to control the active Propagation Delays clamp. All devices feature an independent enable input S CMOS-Compatible Logic Inputs EN. All digital inputs are CMOS compatible (see the S 56-Pin, 8mm x 8mm, TQFN Package Ordering Information/Selector Guide). The MAX4940/MAX4940A are available in a 56-pin, 8mm x Ordering Information/ 8mm, TQFN exposed pad package and are specified over the 0NC to +70NC commercial temperature range. Selector Guide Warning: Exercise caution. The MAX4940/MAX4940A are OUTPUT OUTPUT PIN- designed to operate with high voltages. PART BLOCKING CURRENT PACKAGE DIODE (A) Applications MAX4940CTN+ None 2.0 (typ) 56 TQFN-EP* Ultrasound Medical Imaging OUT2A, MAX4940ACTN+ 2.0 (typ) 56 TQFN-EP* Flaw Detection OUT2B Piezoelectric Drivers Note: Devices operate over the 0C to +70C temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. Test Instruments *EP = Exposed pad. Cleaning Equipment Pin Configuration TOP VIEW 42 41 40 39 38 37 36 35 34 33 32 31 30 29 OUT1A 43 28 OUT1B GND 44 27 GND V 45 26 V PP1 PP1 C 46 25 C GP1A GP1B C 47 24 C GN1A GN1B C 48 23 C GN2A GN2B C 49 22 C GP2A GP2B MAX4940 C 50 21 C DP2A DP2B MAX4940A C 51 20 C DN2A DN2B C 52 19 C DN1A DN1B C 53 18 C DP1A DP1B V 54 17 V CC CC *EP GND 55 16 GND + V 56 15 V DD EE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TQFN *EP = EXPOSED PAD. CONNECT EP TO V . NN1 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. EVALUATION KIT AVAILABLE INP1A GND CLP1A V NN1 INN1A V NN2 INP2A N.C. CLP2A OUT2A INN2A GND AGND V PP2 EN V PP2 INP2B GND CLP2B OUT2B INN2B N.C. INP1B V NN2 CLP1B V NN1 INN1B GNDDual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) C , C Voltage ................................................-0.3V to V DP DN CC V Logic Supply Voltage ......................................-0.3V to +6V Continuous Power Dissipation (T = +70NC) DD A 56-Pin TQFN (derate 47.6mW/NC above +70NC) .......3809mW V Output Driver Positive Supply Voltage ..........-0.3V to +15V CC Thermal Resistance (Note 1) V Output Driver Negative Supply Voltage ........-15V to +0.3V EE B ................................................................................21NC/W V High-Positive Supply Voltage ........-0.3V to (V + 220V) JA PP NN B .................................................................................1NC/W V Low-Negative Supply Voltage ...................-220V to +0.3V JC NN Operating Temperature Range ............................. 0NC to +70NC V - V , V - V Supply Voltage .........-0.6V to +250V PP1 NN1 PP2 NN2 Junction Temperature .....................................................+150NC INP , INN , CLP , EN Logic Input ........... -0.3V to (V + 0.3V) DD Storage Temperature Range ............................ -65NC to +150NC C Voltage ......................... (-0.3V + V ) to (+15V + V ) GN NN NN Lead Temperature (soldering, 10s) ................................+300NC C Voltage ............................(+0.3V + V ) to (-15V + V ) GP PP PP Note 1: Package thermal resistances 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. 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. ELECTRICAL CHARACTERISTICS (V = +3V, V = +12V, V = -12V, V = +100V, V = -100V, T = T to T , unless otherwise noted. Typical values are DD CC EE PP NN A MIN MAX at T = +25NC.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY (V , V , V , V , V ) DD CC EE PP NN Logic Supply Voltage V 2.37 3 6 V DD Positive Drive Supply Voltage V 4.75 12 12.6 V CC 1.05 x 0.95 x Negative Drive Supply Voltage V -V V EE CC (-V ) (-V ) CC CC High-Side Supply Voltage V 0 +200 V PP1 Low-Side Supply Voltage V -200 0 V NN1 High-Side Supply Voltage V 0 V V PP2 PP1 Low-Side Supply Voltage V V 0 V NN2 NN1 V - V Supply Voltage 0 +200 V PP NN SUPPLY CURRENT (for single channel) V /V /V = 0 or V , V = 0 1 FA INN INP CLP DD EN V Supply Current I DD DD V = V , V = 0 or V , V = EN DD CLP DD INN 100 200 FA V , f = 5MHz, one channel switching INP V = 0 (static) 1 EN FA V = V (static) 10 EN DD V = V , V = 0 or V , V = EN DD CLP DD INN V , f = 5MHz, V = +12V, V = +3V, 36 INP CC DD V Supply Current I CC CC one channel switching mA V = V , V = 0 or V , V = EN DD CLP DD INN V , f = 5MHz, V = +5V, V = +3V, 15 INP CC DD one channel switching 2 MAX4940/MAX4940A