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LM96551

www.ti.com

SNAS511B –OCTOBER 2011–REVISED MAY 2013

LM96551 Ultrasound Transmit Pulser

Check for Samples: LM96551

FEATURES

APPLICATIONS

• 8-Channel High-Voltage CMOS Pulse

• Ultrasound Imaging

Generator

DESCRIPTION

• Output Pulses with ±50V and 2A Peak Current

The LM96551 is an eight-channel monolithic high-

• Active Damper with Built-In Blocking Diodes

voltage, high-speed pulse generator for multi-channel

• Built-In Floating Supply Voltages for Output

medical ultrasound applications. It is well-suited for

Stage

use with Texas Instrument’s LM965XX series chipset

which offers a complete medical ultrasound solution

• Up to 15 MHz Operating Frequency

targeted towards low-power, portable systems.

• Matched Delays for Rising and Falling Edges

The LM96551 contains eight high-voltage pulsers

• Low Second Harmonic Distortion Allows and

with integrated diodes generating ±50V bipolar pulses

Improves Harmonic Imaging

with peak currents of up to 2A and pulse rates of up

• Continuous-Wave (CW) Operation Down to

to 15 MHz. Advanced features include low-jitter and

±3.3V

low-phase-noise output pulses ideal for continuous-

• Low Phase Noise Enables Doppler

wave (CW) modes of operation. Active clamp circuitry

Measurements

is integrated for ensuring low harmonic distortion of

the output signal waveform.

– -145 dBc/Hz Phase Noise at 10 MHz (1 kHz

offset)

The LM96551 also featuers a low-power operation

mode and over-temperature protection (OTP) which

• Output State Over-Temperature Protection

are enabled by on-chip temperature sensing and

• Blocking Diodes for Direct Interface to

power-down logic.

Transducer

• 2.5V to 5.0V CMOS Logic Interface

• Low-Power Consumption per Channel

• Over Temperature Protection

KEY SPECIFICATIONS

• Output voltage ±50 V

• Output peak current ±2.0 A

• Output pulse rate Up to 15 MHz

• Rise/fall delay matching (max) < 3.7 ns

• Pulser HD2 (5 MHz) -40 dB

• Operating Temp. 0 to +70 °C

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (14 pages)

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LM96551 www.ti.
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LM96551 SNAS511B – OCTOBER 2011 – REVISED MAY 2013 www.ti.com Block Diagram VLL VDD VPP VPF VDN MOD EN Level Shifter Up PIN n NIN n Input Buffer Level Shifter Buffer Vout n OTP Level Shifter Down Temp Sensor Buffer Active Damper Regulates VSUB AGND VNF VNN HVGND Typical Application Figure 1.
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LM96551 www.ti.
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LM96551 SNAS511B – OCTOBER 2011 – REVISED MAY 2013 www.ti.com PIN DESCRIPTIONS Pin No. Name Type 21, 23, 25, 27, 33, 35, 37, 39 PIN n=0...7 Input Logic control positive output channel P 1 = ON 0 = OFF 22, 24, 26, 28, 34, 36, 38, 40 NIN n=0...
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LM96551 www.ti.com SNAS511B – OCTOBER 2011 – REVISED MAY 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Maximum Junction Temperature (TJMAX) +150°C −40°C to +125°C Storage Temperature Range Supply Voltage (VDD) –0.3V to +12V Supply Voltage (VDN) +0.3V and −12V Supply Voltage (VPP) –0.
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LM96551 SNAS511B – OCTOBER 2011 – REVISED MAY 2013 www.ti.com Analog Characteristics Unless otherwise stated, the following conditions apply VLL = +3.3V, VPP = −VNN = 50V, VSUB = −55V, VDD = −VDN = 10V, RL = 2KΩ, TA = 25°C, Fin=5MHz, Mode = LO, EN = HI. Symbol FOUT Parameter Output Frequency Range Conditions Min RL = 100Ω Output Voltage Range Max Units 1 Typ 15 MHz -48.5 +48.5 V Output Current 2% Duty Cycle Output Current 100% Duty Cycle, Mode=HI 0.
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LM96551 www.ti.com SNAS511B – OCTOBER 2011 – REVISED MAY 2013 DC Characteristics Unless otherwise stated, the following conditions apply. VLL = +3.3V, VDD = −VDN = 10V, VSUB = −55V, VPP = −VNN = 50V, TA = 25°C, Symbol Parameter Conditions VIL Low Input “LO” threshold VIH High Input “HI” threshold IIN input current Min Typ Max Unit 1 V 2.
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LM96551 SNAS511B – OCTOBER 2011 – REVISED MAY 2013 www.ti.com Continuous-wave (CW) applications are supported for low power consumption down to VPP = -VNN = 3.3V with Mode =HI. Internally, the CMOS logic input signals are level shifted to VDD = 10V and VDN = -10V for pulse transmission. The outputs of the level shifter drive the high-voltage P and N drivers that control the output power MOSFETs, which are supplied from the positive and negative rails VPP and VNN, respectively.
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LM96551 www.ti.com SNAS511B – OCTOBER 2011 – REVISED MAY 2013 Typical Performance Characteristics Unless otherwise stated, the following conditions apply VLL = +3.3V, VDD = −VDN = 10V, VSUB = −55V, VPP = −VNN = 50V, RL = 100Ω, CL = 330pF, Fin=5MHz, TA = 25°C. Mode = LO, EN = HI Return-to-Zero Rise Time (RL=2KΩ) Return-to-Zero Fall Time (RL=2KΩ) Figure 6. Figure 7. Harmonic Distortion (8 pulses) Differential Input vs. Pulser Output Phase Noise (1) Figure 8. Figure 9.
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LM96551 SNAS511B – OCTOBER 2011 – REVISED MAY 2013 www.ti.com FUNCTIONAL DESCRIPTION Note that the case, PINn = NNn = HI is not allowed as it will damage the output transistors. Logic inputs Output EN PINn NINn 1 0 0 Voutn 0V 1 1 0 VPP - 0.7V 1 0 1 VNN + 0.7V 1 1 1 not allowed 0 X X 0V APPLICATIONS INFORMATION POWER-UP AND POWER-DOWN SEQUENCES VSUB must always be the most negative supply, i.e., it must be equal to or more negative than the most negative supply, VNN or VDN.
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LM96551 www.ti.com SNAS511B – OCTOBER 2011 – REVISED MAY 2013 REVISION HISTORY Changes from Revision A (May 2013) to Revision B • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 28-Sep-2013 PACKAGING INFORMATION Orderable Device Status (1) LM96551SQE/NOPB ACTIVE Package Type Package Pins Package Drawing Qty WQFN NKF 80 250 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Device Marking (3) SN Level-3-260C-168 HR (4/5) LM96551SQ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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MECHANICAL DATA NKF0080A SQA80A (Rev A) www.ti.
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