便携式彩超是传统彩超机的微型化及方便化，同时为达到携带方便，而应用许多新技术。

1.全数字化太空芯片技术：7.3 MM太空数码芯片技术，浓缩了传统彩超的电路板功能，使医学界第一次有了真正数码彩超仪器。全数字化太空芯片技术的特点：使高科技产品体积超微型化,人们不再以“体积”大小定价值。将传统常规诊断工具引向便携式，使其更科学、更先进、更直观、更方便。全数字化太空芯片技术的优点：真正实现软件无限制性升级。

2.全数字化的最新平台设计：全新理念数码多功能高档彩色超声影像系统采用泰圣公司独有的数字化连续波束形成器技术，实现发射和接收连续聚焦，充分减少噪声和伪像，并且使得图像的远场和近场均匀一致。具有高达160dB的系统动态范围，超高的动态范围使系统具有极高的对比分辨率。高倍数字处理通道技术，可显著提高图像的帧频，完全满足了用户临床检查的要求。3.数字化连续波束形成器：数字化连续波束形成器，应用了前端数字化技术，即探头阵元接收到回波信号后，立即放大。

核心优势

1.Freescale处理器是一款高性能，高集成度，功能齐备的处理器，使系统的设计与功能的实现时间缩短。

2.Intersil在整个模拟前端及电源管理，接口，实时时钟及电池充电管理都具有高性能的产品。

1)高性能，低噪声，高精度的运放产品。

2)低噪声，高精度的ADC产品。

3)各种精度的实时时钟产品可供选择。

4)品种齐全的接口产品。

3.IDT能提供客户所需的高性能时钟发生器，时钟分配器

方案元器件：

ISL21009

High Voltage Input Precision, Low Noise FGA™ Voltage References

Key Features

Output Voltages: 1.250V, 2.500V, 4.096V, 5.000V

Initial Accuracy: ±0.5mV, ±1.0mV, ±2.0mV

Input Voltage Range: 3.5V to 16.5V

Output Voltage Noise: 4.5µVP-P (0.1Hz to 10Hz)

Supply Current: 180µA (Max)

Temperature Coefficient: 3ppm/°C, 5ppm/°C, 10ppm/°C

Output Current Capability: Up to ±7.0mA

Operating Temperature Range: -40°C to +125°C

Package: 8 Ld SOIC

Pb-Free (RoHS Compliant)

Description

The ISL21009 FGA™ voltage references are extremely low power, high precision, and low noise voltage references fabricated on Intersil's proprietary Floating Gate Analog technology. The ISL21009 features very low noise (4.5µVP-P for 0.1Hz to 10Hz), low operating current (180µA, Max), and 3ppm/°C of temperature drift. In addition, the ISL21009 family features guaranteed initial accuracy as low as ±0.5mV.

This combination of high initial accuracy, low power and low output noise performance of the ISL21009 enables versatile high performance control and data acquisition applications with low power consumption.

Applications

High Resolution A/Ds and D/As

Digital Meters

Bar Code Scanners

Basestations

Battery Management/Monitoring

Industrial/Instrumentation Equipment

ISL9110

1.2A High Efficiency Buck-Boost Regulators

Key Features

Accepts Input Voltages Above or Below Regulated Output Voltage

Automatic and Seamless Transitions Between Buck and Boost Modes

Input Voltage Range: 1.8V to 5.5V

Output Current: Up to 1.2A

High Efficiency: Up to 95%

35µA Quiescent Current Maximizes Light-load Efficiency

2.5MHz Switching Frequency Minimizes External Component Size

Selectable Forced-PWM Mode and External Synchronization

I2C Interface (ISL9112)

Fully Protected for Overcurrent, Over-temperature and Undervoltage

Small 3mmx3mm TDFN Package

Description

The ISL9110 and ISL9112 are highly-integrated Buck-Boost switching regulators that accept input voltages either above or below the regulated output voltage. Unlike other Buck-Boost regulators, these regulators automatically transition between operating modes without significant output disturbance.

Both parts are capable of delivering up to 1.2A output current, and provide excellent efficiency due to their fully synchronous 4-switch architecture. No-load quiescent current of only 35µA also optimizes efficiency under light-load conditions. Forced PWM and/or synchronization to an external clock may also be selected for noise sensitive applications.

The ISL9110 is designed for standalone applications and supports 3.3V and 5V fixed output voltages or variable output voltages with an external resistor divider. Output voltages as low as 1V, or as high as 5.2V are supported using an external resistor divider.

The ISL9112 supports a broader set of programmable features that may be accessed via an I2C bus interface. With a programmable output voltage range of 1.9V to 5V, the ISL9112 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between output voltage settings.

The ISL9110 and ISL9112 require only a single inductor and very few external components. Power supply solution size is minimized by a tiny 3mmx3mm package and a 2.5MHz switching frequency, which further reduces the size of external components.

Applications

Regulated 3.3V from a Single Li-Ion Battery

Smart Phones and Tablet Computers

Handheld Devices

Point-of-Load Regulators

ISL85033

Wide VIN Dual Standard Buck Regulator With 3A/3A Continuous Output Current

Key Features

Wide input voltage range from 4.5V to 28V

Adjustable output voltage with continuous output current up to 3A

Current mode control

Adjustable switching frequency from 300kHz to 2MHz

Independent power-good detection

Selectable in-phase or out-of-phase PWM operation

Independent, sequential, ratiometric or absolute tracking between outputs

Internal 2ms soft-start time

Overcurrent/short circuit protection, thermal overload protection, UVLO

Boot undervoltage detection

Pb-free (RoHS compliant)

Description

The ISL85033 is a dual standard buck regulator capable of 3A per channel continuous output current. With an input range of 4.5V to 28V, it provides a high frequency power solution for a variety of point of load applications. The PWM controller in the ISL85033 drives an internal switching N-Channel power MOSFET and requires an external Schottky diode to generate the output voltage. The integrated power switch is optimized for excellent thermal performance up to 3A of output current. The PWM regulator switches at a default frequency of 500kHz and it can be user programmed or synchronized from 300kHz to 2MHz. The ISL85033 utilizes peak current mode control to provide flexibility in component selection and minimize solution size. The protection features include overcurrent, UVLO and thermal overload protection. The ISL85033 is available in a small 4mmx4mm Thin Quad Flat No-Lead (TQFN) Pb-free package.

Applications

General purpose point-of-load DC/DC power conversion

Set-top boxes

FPGA power and STB power

DVD and HDD drives

LCD panels, TV power

Cable modems

ISL8023

Compact Synchronous Buck Regulator

Key Features

2.7V to 5.5V input voltage range

Very low on-resistance FET’s - P-Channel 45mΩ and N-Channel 19mΩ typical values

High efficiency synchronous buck regulator with up to 95% efficiency

0.8% reference accuracy over-temperature/load/line

Complete BOM with as few as 3 external parts

Start-up with pre-biased output

Internal soft-start - 1ms or adjustable

Soft-stop output discharge during disabled

Adjustable frequency from 500kHz to 4MHz - default at 1MHz (8023/24), 2MHz (8023A/24A)

External synchronization up to 4MHz

Over-temperature, Overcurrent, Overvoltage and negative overcurrent protection

Tiny 3x3 QFN package

Description

The ISL8023, ISL8024 are highly efficient, monolithic, synchronous step-down DC/DC converters that can deliver 3A (ISL8023) or 4A (ISL8024) of continuous output current from a 2.7V to 5.5V input supply. The devices use current mode control architecture to deliver very low duty cycle operation at high frequency with fast transient response and excellent loop stability.

The ISL8023 and ISL8024 integrate a very low On-resistance P-Channel (45mΩ) high side FET and N-Channel (19mΩ) low side FET to maximize efficiency and minimize external component count. The 100% duty-cycle operation allows less than 200mV dropout voltage at 4A output current. The operation frequency of the pulse-width modulator (PWM) is adjustable from 500kHz to 4MHz. The default switching frequency of 1MHz is set by connecting the FS pin high, which allows for the use of small external components.

The ISL8023, ISL8024 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides higher efficiency by reducing switching losses at light loads.

Fault protection is provided by internal hiccup mode current limiting during short circuit and overcurrent conditions. Other protection, such as overvoltage and over-temperature are also integrated into the device. A power-good output voltage monitor indicates when the output is in regulation. The ISL8023, ISL8024 offer a 1ms Power-Good (PG) timer at power-up. When in shutdown, ISL8023, ISL8024 discharges the output capacitor through an internal soft-stop switch. Other features include internal fixed or adjustable soft-start and internal/external compensation.

The ISL8023 and ISL8024 are offered in a space saving 16 Ld 3x3 Pb-free QFN package with an exposed pad for improved thermal performance and 1mm maximum height. The complete converter occupies less than 0.22 in2 area.

Various fixed output voltages are available upon request. See the “Ordering Information” on page 4 for more details.

Applications

DC/DC POL modules

μC/µP, FPGA and DSP power

Plug-in DC/DC modules for routers and switchers

Portable instruments

Test and measurement systems

Li-ion battery powered devices

ISL3232E

QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers

Key Features

Available in Near Chip Scale QFN (5mmx5mm) Package, which is 40% Smaller than a 20 Ld TSSOP

ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)

Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V

RS-232 Compatible with VCC = 2.7V

On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors

Manual and Automatic Power-down Features (Except ISL3232E)

Receiver Hysteresis For Improved Noise Immunity

Guaranteed Minimum Data Rate: 250kbps

Wide Power Supply Range: Single +2.7V to +5.5V

Low Supply Current in Power-down State: 150nA

Pb-Free Available (RoHS Compliant)

Description

The Intersil ISL3232E and ISL4221E, ISL4223E devices are 2.7V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at

VCC = 3.0V. Additionally, they provide ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and hand-held products where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and automatic power-down functions, reduce the standby supply current to a 150nA trickle. Tiny 5mmx5mm Quad Flat No-Lead (QFN) packaging and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions.

The ISL4221E is a 1 driver, 1 receiver device and the ISL3232E and ISL4223E are 2 driver,

2 receiver devices that, coupled with the 5mmx5mm QFN package, provide the industry's smallest, lowest power serial port suitable for PDAs, and hand-held applications. The 5mmx5mm QFN requires 40% less board area than a 20 Ld TSSOP, and is nearly 20% thinner.

The ISL4221E, ISL4223E versions feature an automatic power-down function that powers down the on-chip power supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system power automatically without changes to the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input.

Table 1 summarizes the features of the IC's, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.

Applications

Any Space Constrained System Requiring RS-232 Ports

Battery Powered, and Portable Equipment

Hand-Held Products (GPS Receivers, Bar Code Scanners, etc.)

PDAs and Palmtops, Data Cables

Cellular/Mobile Phones, Digital Cameras

ICL3245

1mA, +3V to +5.5V, 1Mbps, RS-232 Transceivers with Enhanced Automatic Powerdown

Key Features

±15kV ESD Protected (Human Body Model)

Manual and Enhanced Automatic Powerdown Features

Drop in Replacements for MAX3225, MAX3245

Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V

Latch-Up Free

On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors

Guaranteed Mouse Driveability (ICL3245)

"Ready to Transmit" Indicator Output (ICL3225)

Receiver Hysteresis For Improved Noise Immunity

Guaranteed Minimum Data Rate 1Mbps

Low Skew at Transmitter/Receiver Input Trip Points 10ns

Guaranteed Minimum Slew Rate 24V/µs

Wide Power Supply Range Single +3V to +5.5V

Low Supply Current in Powerdown State 1µA

Pb-Free Plus Anneal Available (RoHS Compliant)

Description

The Intersil ICL32XX devices are 3.0V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. Targeted applications are PDAs, Palmtops, and notebook and laptop computers where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and enhanced automatic powerdown functions, reduce the standby supply current to a 1µA trickle. Small footprint packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 1Mbps are guaranteed at worst case load conditions. This family is fully compatible with 3.3V only systems, mixed 3.3V and 5.0V systems, and 5.0V only systems.

The ICL3245 is a 3 driver, 5 receiver device that provides a complete serial port suitable for laptop or notebook computers. It also includes a noninverting always-active receiver for "wake-up" capability.

These devices, feature an enhanced automatic powerdown function which powers down the on-chip powersupply and driver circuits. This occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30s. These devices power back up, automatically, whenever they sense a transition on any transmitter or receiver input.

Applications

Any System Requiring RS-232 Communication Ports

Battery Powered, Hand-Held, and Portable Equipment

Laptop Computers, Notebooks, Palmtops

Modems, Printers and other Peripherals

Digital Cameras

Cellular/Mobile Phones

ISL12027

Real Time Clock/Calendar with EEPROM

Key Features

Real Time Clock/Calendar

Tracks Time in Hours, Minutes and Seconds

Day of the Week, Day, Month and Year

Two Non-Volatile Alarms

Settable on the Second, Minute, Hour, Day of the Week, Day, or Month

Repeat Mode (Periodic Interrupts)

Automatic Backup to Battery or SuperCap

On-Chip Oscillator Compensation

Internal Feedback Resistor and Compensation Capacitors

64 Position Digitally Controlled Trim Capacitor

6 Digital Frequency Adjustment Settings to ±30ppm

512x8-Bits of EEPROM

16-Byte Page Write Mode (32 total pages)

8 Modes of BlockLock™ Protection

Single Byte Write Capability

High Reliability

Data Retention: 50 years

Endurance: >2,000,000 Cycles Per Byte

I2C-bus™ Interface

400kHz Data Transfer Rate

800nA Battery Supply Current

Package Options

8 Ld SOIC and 8 Ld TSSOP Packages

Pb-Free (RoHS Compliant)

Description

The ISL12027 device is a low power real time clock with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, CPU Supervisor and integrated 512x8-bit EEPROM, in 16 Byte per page format.

The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.

The ISL12027 and ISL12027A Power Control Settings are different. The ISL12027 uses the Legacy Mode Setting, and the ISL12027A uses the Standard Mode Setting. Applications that have VBAT > VDD will require only the ISL12027A.

Applications

Utility Meters

HVAC Equipment

Audio/Video Components

Modems

Network Routers, Hubs, Switches, Bridges

Cellular Infrastructure Equipment

Fixed Broadband Wireless Equipment

Pagers/PDA

POS Equipment

Test Meters/Fixtures

Office Automation (Copiers, Fax)

Home Appliances

Computer Products

Other Industrial/Medical/Automotive

ISL1208

I2C® Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM

Key Features

Real Time Clock/Calendar

Tracks Time in Hours, Minutes, and Seconds

Day of the Week, Day, Month, and Year

15 Selectable Frequency Outputs

Single Alarm

Settable to the Second, Minute, Hour, Day of the Week, Day, or Month

Single Event or Pulse Interrupt Mode

Automatic Backup to Battery or Super Capacitor

Power Failure Detection

On-Chip Oscillator Compensation

2 Bytes Battery-Backed User SRAM

I2C Interface

400kHz Data Transfer Rate

400nA Battery Supply Current

Same Pin Out as ST M41Txx and Maxim DS13xx Devices

Small Package Options

8 Ld MSOP and SOIC Packages

8 Ld TDFN Package

Pb-Free Available (RoHS Compliant)

Description

The ISL1208 device is a low power real time clock with timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and battery-backed user SRAM.

The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.

Applications

Utility Meters

HVAC Equipment

Audio/Video Components

Set-Top Box/Television

Modems

Network Routers, Hubs, Switches, Bridges

Cellular Infrastructure Equipment

Fixed Broadband Wireless Equipment

Pagers/PDA

POS Equipment

Test Meters/Fixtures

Office Automation (Copiers, Fax)

Home Appliances

Computer Products