MD1730-V/M2 Microchip

MD1730 8-Channel Ultra-Low Phase Noise Continuous Waveform Transmitter with Beamformer Features General Description 8-Channel Ultrasound Continuous Waveform The MD1730 is an 8-channel ultra-low phase noise CW (CW) Transmitter with Integrated Beamformer transmitter with integrated beamformer. It is designed for medical ultrasound imaging systems requiring CW Output 1V to 6Vp-p with Low R ON high-performance CW Doppler mode. The MD1730 -160 dbc/Hz Ultra-Low Phase Noise at 1 kHz has a dedicated signal path designed to minimize Offset and 5 MHz phase noise to the output. In addition, it has a 8-Bit Programmable Per-Channel Beamforming high-speed SPI interface that enables CW Phase Delay beamforming features. The outputs of the MD1730 can 8-Bit Programmable Dividers for CW Frequency swing up to 6V and each output has a separate with Input Clock Frequency up to 250 Mhz programmable phase delay. Additionally, by Input Clock Compatible with LVDS/SSTL or programming the internal frequency divider register, Single-Ended LVCMOS the MD1730 can output different CW frequencies from a single clock source. For instance, when the input LVCMOS 2.5V Logic for the Control I/O pins clock frequency is 160 MHz and the frequency divider Fast SPI Interface Supports up to 200 MHz is set to 16, an output CW frequency of 5 MHz can be SPI Interface Supports Daisy Chaining and obtained with a phase delay step size of 6.25 ns, which Broadcasting Mode translates to an angular resolution of 11.25 degrees. Applications Package Type Medical Ultrasound Imaging System for MD1730 Cardiovascular Application 6x6x0.9 mm 36-lead VQFN* Ultrasound Fetal Heart Monitoring Device Ultrasound Flow Meter Programmable Array Pattern Generator 36 35 34 33 32 31 30 29 28 EN 1 27 CW0 CLKP CW1 2 26 CLKN 3 25 CW2 V 4 CW3 LL 24 EP 5 37 23 GND V GN V 6 22 CW4 DD SCK 7 CW5 21 CSN 8 20 CW6 SDI 9 19 CW7 10 11 12 13 14 15 16 17 18 * Includes Exposed Thermal Pad (EP) see Table 3-1. 2016 Microchip Technology Inc. DS20005586B-page 1 SDO SPIB CBE1 CBE0 CKB0 CKB1 GND TXRW V V GP GN CNF CNF V CW- V CW- CPF CPF V V CW+ CW+MD1730 Block Diagram +2.5V +5V +10V 1uF 2.2uF V 1uF V V LL DD GP CBE0 CBE1 VLL CLK CKB0 CLKP LVDS /SSTL Clock Input CLKN VLL SCK SCK SPI CSN CKB1 & SDI D0 Registers CLK SDO HIZ 7:0 QMSB CWFD 7:0 PHD7~0 7:0 SPIB VCW+0to+ 6V 64 8 VCW+ 1uF 1uF EN CPF VPF PHD0 7:0 CWFD 7:0 VPF ENA ENA Q Q CLK CLK CW0 VNF TXRW CW1 CW2 PHD1 7:0 CWFD 7:0 ENA ENA Q Q CLK CLK VCW- CW3 VCW+ CW4 CW5 CW6 PHD7 7:0 CWFD 7:0 VPF ENA Q ENA Q CLK CLK CW7 VNF VNF CNF CLK 1uF 1uF MD1730 VCW- SUB VCW- 0to-6V GND Thermal V GN Pad 2.2uF -10V DS20005586B-page 2 2016 Microchip Technology Inc.