MD2131 Supertex inc. High Speed Ultrasound Beamforming Source Driver Features General Description High resolution transmitting waveform The MD2131 is a high-speed, arbitrary waveform, push-pull Up to 3.0A push-pull source-driving current source driver. It is designed for medical ultrasound imaging and 230V maximum output, uses two DN2625 FETs HIFU beamforming applications. It also can be used in NDT, P-P Angle vector beamforming I-Q switcher matrix Sonar and other ultrasound phase-array focusing beamforming 8-bit apodization DAC and 7.5 angular resolution applications. Flexible frequency-resolution trade-off Programmable aperture windowing The MD2131 consists of CMOS digital logic input circuits, an 250MHz maximum sampling rate 8-bit current DAC for waveform amplitude control, and four PWM 25MHz ultrasound maximum frequency current-sources. These current sources are constructed with the PWM modulation push-pull current source high-speed, in-phase and quadrature current-switch matrix and Focusing phase adjustment & chirp waveform the built-in sine and cosine angle-to-vector look-up table. The O Fast SPI interface angular resolution of the vector table is 7.5 per step, with a total 2.5V CMOS logic interface range of 48 steps. There are four logic input signals to control the +5.0V single power supply in-phase and quadrature PWM push-pull current-sources output Low second order harmonic distortions timing, frequency, cycle in the burst and waveform envelope. Applications The MD2131s output stage is designed to drive two DN2625 Medical ultrasound imaging transmit beamforming depletion N-type MOSFETs. The MOSFET drains are connected High resolution NDT and Sonar phase arrays to a center-tap ultrasound frequency pulse transformer. The HIFU transducer phase arrays beamforming and secondary winding of the transformer can connect to the focus scanning ultrasound piezo or capacitive transducer via a cable with a Piezoelectric & MEMS transducer waveform drivers good impendence match. The MD2131 has a high-speed, SPI- High speed, high voltage, arbitrary waveform compatible interface to achieve per-scan-line fast updating of the generator data register for changing the beamforming phase angles and apodization amplitudes. MD2131 Block Diagram +2.5V +5.0V VLL VDD C3A C2A KA C1A +5.0V +3.3V IA QA D1 Level Translator IB PA T1 DN2625 QB I SUB +70-100V V EN Vector SIN/COS PP GND A Beamforming Table XDRC SDI Data Switch & Latch Matrix Level SDO & Translator Q Control DN2625 PB SCK Logic CS D2 DAC LD +5.0V +3.3V DGND AGND VREF RFB C3B C2B KB C1B +V REF Doc. DSFP-MD2131 Supertex inc. C102412 www.supertex.comMD2131 Ordering Information Pin Configuration 40 Part Number Package Option Packing 1 MD2131K7-G 40-Lead (5x5) QFN 490/Tray -G indicates package is RoHS compliant (Green) 40-Lead QFN (K7) (top view) Absolute Maximum Ratings Package Marking Parameter Value L = Lot Number V , Logic supply -0.5V to +3.5V LL YY = Year Sealed MD2131 WW = Week Sealed LLLLLL V , Positive supply -0.5V to +6.0V DD A = Assembler ID YYWW AAACCC C = Country of Origin V V Driver outputs -0.5V to +6.0V PA PB = Green Packaging V , Ground 0V SUB Package may or may not include the following marks: Si or 40-Lead QFN (K7) Operating temperature 0C to +70C Storage temperature -65C to +150C Typical Thermal Resistance Absolute Maximum Ratings are those values beyond which damage to the device may Package occur. Functional operation under these conditions is not implied. Continuous operation ja of the device at the absolute rating level may affect device reliability. All voltages are O 40-Lead QFN 26 C/W* referenced to device ground. * 4x3, 4-layer 1oz 16-via PCB Operating Supply Voltages (Over operating conditions unless otherwise specified, V = +2.5V, V = +5.0V, R = 50k, DAC = 0, V = 2.5V, T = 25C) LL DD FB REF A Sym Parameter Min Typ Max Units Conditions V Logic supply 2.3 2.5 2.7 V LL T = 0 to 70C A V Power supply 4.75 5.00 5.25 V DD I V supply current EN = 0 - 0.1 1.0 LLQ LL A Standby condition I V supply current EN = 0 - 0.2 1.0 DDQ DD I V supply current EN = 1 - 5.0 20 A LLEN LL f = 0, all logic input no transit CLK I V supply current EN = 1 - 5.0 12 mA DDEN DD I V supply current EN = 1 - 0.5 3.0 mA f = 50MHz, CW, IA, IB, QA, QB = 0 LL50 LL CLK I V supply current EN = 1 - 80 - mA EN = 1, IA, IB, QA, QB = 50MHz, CW DD50 DD Output Characteristics (Over operating conditions unless otherwise specified, V = +2.5V, V = +5.0V, V = 2.5V, R = 50k, LL DD REF FB Angle = 45 IA = QA = Hi or IB = QB = Hi of 1s, D% = 0.1%, T = 25C) A Sym Parameter Min Typ Max Units Conditions I Full scale output peak current 2.88 - 3.52 A DAC = 255 MAX-A/B I Output current offset - 0.5 2.0 mA DAC = 0 OO-A/B 5.3 5.8 - I = 1.0A PA/B Output voltage range, 5.0 5.5 - I = 1.5A PA/B +10% of I PA/B 4.5 5.0 - I = 3.0A PA/B V , V V PA PB - 1.0 1.5 I = 1.0A PA/B Output voltage range, - 1.2 1.7 I = 1.5A PA/B -10% of I PA/B - 1.8 2.3 I = 3.0A PA/B Doc. DSFP-MD2131 Supertex inc. C102412 www.supertex.com 2