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HV7358 Datasheet(PDF) 1 Page - Microchip Technology |
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HV7358 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 50 page  2018 Microchip Technology Inc. DS20005918A-page 1 HV7358 Features • 16-Channel with Active Return to True Zero • Up to ±80V Output Voltage and ±1.6A Output Current • Programmable Output Current: 0.3A, 0.5A, 1.0A and 1.6A • -40 dB Second Harmonic at 5 MHz, ±70V, 5-Cycle • Built-in T/R Switch, Damper and Protection Diodes • Built-in Linear Regulators for Floating Gate Driver • Internal Low Jitter Phase-Locked Loop (PLL) Clock Multiplier for TXCH Clock • 30 MHz to 80 MHz Input Clock Frequency in PLL Mode • 30 MHz to 200 MHz Input Clock Frequency (in Non-PLL Mode) over Low-Voltage Differential Signaling (LVDS) Connection • PLL Frequency Integer Multiplier x1, x2, x3, x4, x5, x6, x8 • Internal Clock Frequency (fC), up to 200 MHz to Allow a 5 ns Delay Resolution • Ensured Synchronize Internal Transmit Clock Across Devices in the Same Phase • PLL Circuit can be Bypassed and Shut Down to Reduce the Power Consumption • Built-in Active Bleeder Circuit on VPP and VNN for Rapid Capacitor Discharging to Reduce the Time Required for Transmit Voltage Adjustment • Configurable 12-Bit Delay for Beamform per Channel • Stores up to Four TXCH Patterns with the Optional Local tOFF Counter, Allowing the TXCH Apodization Use of the Pulse-Width Modulator (PWM) •TXCH Patterns, up to 255 Pulses with Programmable Pulse Width and Frequency • Programmable Continuous Wave (CW) Frequency Divide Ratio, from 1 to 255 of the Input Clock Frequency • Set-and-Go Feature in CW Mode Reduces the Digital Cross-Coupled Noise on PCB • High-Speed LVDS SPI, Typical 200 MHz Operation Allows Fast Device Programming • SPI Group Broadcast Mode for Fast Data Writing •Two-Wire I2C Interface for Control and Status Reading • 13 mm x 13 mm TFBGA Package with 0.8 mm Pitch Applications • Medical Portable Notebook Size and Trolley Size Ultrasound Imaging System • NDT Ultrasound Pulsers and Industrial Use • HV Pulse Pattern Generators General Description The HV7358 is a 16-Channel, 3-Level HV ultrasound transmitter with built-in digital beamformer. Each channel is capable of swinging up to ±80V with an active discharge back to 0V. The outputs can source and sink more than 1.6A to achieve fast output rise and fall times. The active discharge is also capable of ±1.6A for a fast return to ground. The HV7358 additionally features the programmable output current. The output current can be programmed via the I2C Interface. All 16 channels have built-in output protection diodes and clamp diodes. The HV7358 features 16 Integrated T/R switches, a receive damping circuit and an active RTZ circuit. The active RTZ circuit has a typical RON of 300Ω. The active RTZ circuit activates to discharge the transmitter’s output internal node when the transmit burst ends. The gate drivers for the output MOSFETs are powered by built-in linear floating regulators referenced to VPP and VNN. This direct coupling topology of the gate drivers eliminates the need for the gate driver and floating power supply circuit. The HV7358 features an internal low-jitter PLL clock multiplier for generating the delay clock for the built-in digital beamformer. The clock input has to accept an LVDS differential system clock with frequencies from 30 MHz (min.) to 80 MHz (max.) in PLL mode and a frequency from 30 MHz (min.) to 200 MHz (max.) in Non-PLL mode. The clock multiplier is programmable by x1, x2, x3, x4, x5, x6 and x8, and the maximum delay clock frequency can be up to 200 MHz, allowing incremental delays down to 5 ns. This feature elimi- nates the need for the power-hungry external clock synthesizer/multiplier to generate the high-frequency delay clock from the system/sampling clock. The transmitter outputs are synchronized with the delay clock to reduce phase noise. 16-Channel, 3-Level HV Ultrasound Transmitter with Built-in Transmit Beamformer |
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