Datasheet > MAX14809

MAX14809

更新时间： 2024-11-23 12:23:19

品牌	Logo	应用领域
美信 - MAXIM		开关脉冲高压脉冲发生器
页数	文件大小	规格书
31页	1857K
描述
Octal Three-Level/Quad Five-Level High-Voltage 2A Digital Pulsers with T/R Switch

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MAX14808/MAX14809

Octal Three-Level/Quad Five-Level High-Voltage

2A Digital Pulsers with T/R Switch

General Description

Benefits and Features

The MAX14808/MAX14809 octal three-level/quad five-

level, high-voltage (HV) pulser devices generate high-

frequency HV bipolar pulses (up to Q105V) from low-

voltage control logic inputs for driving piezoelectric

transducers in ultrasound systems. All eight channels

have embedded overvoltage-protection diodes and an

integrated active return-to-zero clamp. Both devices have

embedded independent (floating) power supplies (FPS)

and level shifters that allow signal transmission without

the need for external HV capacitors. The MAX14808 also

features eight integrated transmit/receive (T/R) switches.

The MAX14809 does not have the T/R switch function.

S Save Space (Optimized for High-Channel-Count

Systems/Portable Systems)

 High Density

ꢀ

•ꢀEightꢀChannelsꢀ(Three-LevelꢀOperation)

ꢀꢀ •ꢀFourꢀChannelsꢀ(Five-LevelꢀOperation)ꢀinꢀꢀ

One Package

 IntegratedꢀLow-PowerꢀT/RꢀSwitchesꢀ(MAX14808)

 DirectDrive ꢀArchitectureꢀEliminatesꢀExternal

High-Voltage Capacitor

 NoꢀExternalꢀFloatingꢀPowerꢀSupplyꢀ(FPS)

ꢀ

Required

S HighꢀPerformanceꢀ(DesignedꢀtoꢀEnhanceꢀImageꢀ

Quality)

The devices feature two modes of operation: an octal

three-level pulser mode (with integrated active return-

to-zero clamp) or a quad five-level pulser mode. In octal

three-level pulser mode, each channel is controlled by

two logic inputs (DINN_/DINP_) and the active return

to zero features half the current driving of the pulser 1A

(typ). In quad five-level pulser mode, each channel is

controlled by three logic inputs and the active return to

zero has the same current driving of the pulser 2A (typ).

 Excellentꢀ-43dBcꢀ(typ)ꢀTHDꢀforꢀSecond

ꢀ

Harmonicꢀatꢀ5MHz

 SyncꢀFunctionꢀEliminatesꢀEffectsꢀofꢀFPGAꢀJitterꢀꢀ

andꢀImprovesꢀPerformanceꢀinꢀDopplerꢀMode

ꢀ

 LowꢀPropagationꢀDelayꢀ18nsꢀ(typ)

 StrongꢀActiveꢀReturnꢀtoꢀZero

S SaveꢀPower

 LowꢀQuiescentꢀPowerꢀDissipationꢀ(5.7mW/

The devices can operate both in clocked and transparent

mode. In clocked mode, data inputs can be synchronized

with a clean differential or single-ended clock to reduce

phase noise associated with FPGA output signals that are

detrimental for Doppler analysis. In transparent mode, the

synchronization feature is disabled and output reflects

the data input after a 18ns delay. Both devices feature

adjustable maximum current (0.5A to 2A) to reduce power

consumption when full current capability is not required.

ꢀ

ChannelꢀinꢀOctalꢀMode)

 Programmable Current Capability

 ShutdownꢀModeꢀandꢀDisableꢀTransmitꢀMode

Applications

Ultrasound Medical Imaging

Industrial Flaw Detection

Piezoelectric Drivers

Test Equipment

The devices feature integrated grass-clipping diodes

(with low parasitic capacitance) for receive (Rx) and

transmit (Tx) isolations. Both devices feature a damping

circuit that can be activated as soon as the transmit burst

is over. The damping circuit has a typical on-resistance of

500I. It fully discharges the pulser’s output internal node

before the grass-clipping diodes.

Ordering Information and Functional Diagram appear at end

of data sheet.

The devices are available in a 68-pin (10mm x 10mm)

TQFN package with an exposed pad and are specified

over the -40NC to +85NC extended temperature range.

DirectDrive is a registered trademark of Maxim Integrated.

For related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX14808.related.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-6438; Rev 0; 9/12

12 3 4 5 6 7...31

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MAX1480A	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface
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MAX1480A_05	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface
MAX1480ACPI	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface
MAX1480AEPI	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface
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MAX1480B	ADI	获取价格	完备的隔离型、RS-485/RS-422数据接口
MAX1480BCPI	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface
MAX1480BCPI+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, Hybrid, PDIP28, 0.600 INCH, ROHS COMPLIANT, PL
MAX1480BEPI	MAXIM	获取价格	Complete, Isolated RS-485/RS-422 Data Interface

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