MAX4489AUA+中文资料

ParameterSymbolTyp Max t ≤ 10s 3140Steady State 5975Steady StateR θJL 1624°C/W R θJA Maximum Junction-to-Lead C°C/WThermal Characteristics Units Maximum Junction-to-Ambient A °C/W Maximum Junction-to-Ambient A AO4485P-Channel Enhancement Mode Field Effect TransistorSymbolMin TypMaxUnits BV DSS -40V -1T J = 55°C-5I GSS ±100nA V GS(th)-1.7-1.9-2.5V I D(ON)-120A12.515T J =125°C19231620g FS 25S V SD -0.7-1V I S-3A C iss 25003000pF C oss 260pF C rss 180pF R g2.546ΩQ g (10V)4255nC Q g (4.5V)18.6nC Q gs 7nC Q gd 8.6nC t D(on)9.4ns t r 20ns t D(off)55ns t f 30ns t rr 3849ns Q rr47nC 0THIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED. AOS DOES NOT ASSUME ANY LIABILITY ARISING OUT OF SUCH APPLICATIONS OR USES OF ITS PRODUCTS. AOS RESERVES THE RIGHT TO IMPROVE PRODUCT DESIGN,FUNCTIONS AND RELIABILITY WITHOUT NOTICE.SWITCHING PARAMETERS DYNAMIC PARAMETERS Maximum Body-Diode Continuous CurrentTotal Gate Charge V GS =0V, V DS =0V, f=1MHzV GS =0V, V DS =-20V, f=1MHz Input Capacitance Gate Source Charge Gate Drain Charge µA Total Gate Charge V GS =-10V, V DS =-20V, I D =-10AOutput Capacitance I S = -1A,V GS = 0V V DS = -5V, I D = -10AForward TransconductanceGate resistanceTurn-Off DelayTime V GS =-10V, V DS =-20V, R L = 2Ω, R GEN =3ΩTurn-Off Fall TimeTurn-On DelayTime Turn-On Rise Time m ΩGate Threshold Voltage V DS = V GS I D = -250µA Electrical Characteristics (T J =25°C unless otherwise noted)STATIC PARAMETERS ParameterConditionsI DSS R DS(ON)Drain-Source Breakdown Voltage Body Diode Reverse Recovery TimeBody Diode Reverse Recovery Charge I F =-10A, dI/dt=100A/µsV GS = -10V, I D = -10AReverse Transfer Capacitance I F =-10A, dI/dt=100A/µsStatic Drain-Source On-ResistanceDiode Forward Voltage V GS = -4.5V, I D = -8AOn state drain currentI D = -250µA, V GS = 0V V GS = -10V, V DS = -5V V DS = -40V, V GS = 0VV DS = 0V, V GS = ±20V Zero Gate Voltage Drain Current Gate-Body leakage current A: The value of R θJA is measured with the device mounted on 1in 2 FR-4 board with 2oz. Copper, in a still air environment with T A = 25°C. The value in any given application depends on the user's specific board design.B: Repetitive rating, pulse width limited by junction temperature.C. The R θJA is the sum of the thermal impedence from junction to lead R θJL and lead to ambient.D. The static characteristics in Figures 1 to 6 are obtained using t ≤ 300µs pulses, duty cycle 0.5% max.E. These tests are performed with the device mounted on 1 in 2 FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The SOA curve provides a single pulse rating.F. The current rating is based on the t ≤ 10s thermal resistance rating.G. E AR and I AR ratings are based on low frequency and duty cycles to keep T j =25C.Rev0 April 2008。

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6通道智能风扇控制器MAX3178519-5703; Rev 0; 12/10+表示无铅(Pb)/符合RoHS 标准的封装。

T = 卷带包装。

*EP = 裸焊盘。

概述MAX31785是一款闭环多通道风扇控制器。

自动闭环风扇控制架构将风扇控制在尽可能低的转速，从而节省系统功率。

低风扇转速的其它优势包括：有效降低可闻噪声和更长的风扇寿命、更少的系统维护。

根据用户可编程查找表(LUT)，器件根据11个温度传感器中的一个或多个传感器测量值，自动调节6个独立风扇的转速。

也可以由外部主机手动控制风扇转速，器件自动调整风扇转速。

器件具有风扇状况诊断功能，帮助用户预防将要发生的风扇故障。

器件还可监测多达6路远端电压。

应用网络交换机/路由器基站服务器智能电网系统工业控制定购信息特性S 6路独立的风扇控制通道 支持3线和4线风扇 自动闭环风扇转速控制 基于RPM 或PWM 控制 可选手动控制模式快速、慢速PWM 频率选项 风扇交替启动，缓解电源压力 双转速计(支持12个风扇) 风扇故障检测 风扇运转状态监测 非易失风扇运转时间表S 支持多达11个温度传感器6个外部温度二极管，带有串联电阻自动抵消功能 1个内部温度传感器 4个I 2C 数字温度传感器对所有温度传感器进行故障检测S 6路ADC 测量远端电压S PMBus™兼容命令接口S I 2C/SMBus™兼容串行总线，带有总线超时功能S 板载非易失故障记录和默认配置设置S 无需外部时钟S +3.3V 供电PMBus 是SMIF, Inc.的商标。

MAX485中文资料2009-11-28 14:49MAX485中文资料，MAX485 PDF,DATASHEET,电路图，通讯程序内容介绍：MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。

MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps 的无差错数据传输。

MAX481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps的传输速率。

这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。

另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA。

所有器件都工作在5V单电源下。

驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。

接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。

MAX481,MAX483,MAX485,MAX487,MAX1487引脚（管脚）图及工作电路MAX485通讯程序与MAX232通讯程序在本质上是一样的，只是MAX485通讯程序需要加上通讯方向控制。

下面是基于mega128 16AU的485通信中断接收的程序，调试通过,晶振为外部16M,MAX485的DE和RE短接连PC0口，程序如下：#define SEND_485 PORTC|=0x01#define READ_485 PORTC&=0xfevoid Usart1_init(void) //16Mhz频率，设置波特率9.6k，8位数据位，无校验，接收发送使能，1位停止位{UBRR1H=0;UBRR1L=103;UCSR1B=(1<<RXCIE1)|(1<<RXEN1)|(1<<TXEN1); //发送接收使能，使用中断方式，UCSR1C=(1<<UCSZ10)|(1<<UCSZ11); //0x06 8位数据，1位停止位，无校验}void Usart1_transmit(unsigned char c) //查询方式发送接收字符函数{SEND_485;DelayBus();DelayBus();DelayBus();while( !(UCSR1A&(1<<UDRE1)));//等待发送缓冲区为空UDR1=c;while(!(UCSR1A&(1<<TXC1)));// UDCR0=c;UCSR1A |= _BV(TXC1);//将发送结束标志位清零// SET_BIT(UCSR1A,);READ_485;direction++;}SIGNAL(SIG_UART1_RECV)//serial port 1 {if(UCSR1A&(1<<RXC1)){rec1buff=UDR1;rec1_flag=1;。

General DescriptionThe MAX4484/MAX4486/MAX4487 single/dual/quad low-cost general-purpose op amps operate from a sin-gle +2.7V to +5.5V supply. The op amps are unity-gain stable with a 7MHz gain-bandwidth product, capable of driving an external 2k Ωload with Rail-to-Rail ®output swing. The amplifiers are stable with capacitive loads of up to 100pF. The MAX4484/MAX4486/MAX4487 are specified from -40°C to +125°C, making them suitable for a variety of harsh environments, such as automotive.The single MAX4484 is available in the ultra-small 5-pin SC70, while the dual MAX4486 is packaged in the space-saving 8-pin SOT23 and µMAX packages. The quad MAX4487 is available in the 14-pin SO and TSSOP packages.________________________ApplicationsSingle-Supply Zero-Crossing Detector Instruments and Terminals Portable Communicators Electronic Ignition ModulesInfrared Receivers for Remote Controls Sensor Signal Detection____________________________Featureso 7MHz Unity-Gain Stable Bandwidth o Stable for Capacitive Loads up to 100pF o +2.7V to +5.5V Single-Supply Voltage Range o Ground-Sensing Inputs o Outputs Swing Rail-to-Railo No Phase Reversal for Overdriven Inputs o 85dB A VOL with 2k ΩLoad o 0.01% THD with 2k ΩLoado Available in Space-Saving Packages5-Pin SC70 (MAX4484)8-Pin SOT23 (MAX4486)MAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps________________________________________________________________Maxim Integrated Products1Pin Configurations/Functional Diagrams19-1823, Rev 0; 10/00For price, delivery, and to place orders,please contact Maxim Distribution at 1-888-629-4642,or visit Maxim’s website at .Ordering InformationRail-to-Rail is a registered trademark of Nippon Motorola, Ltd.M A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS—T A = +25°CStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Power Supply Voltage (V DD to V SS ).........................-0.3V to +6V All Other Pins....................................(V SS - 0.3V) to (V DD + 0.3V)Output Short-Circuit Duration (OUT shortedto V DD or V SS )...........................................................Continuous Continuous Power Dissipation (T A = +70°C)5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C) ...........571mW 8-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW8-Pin µMAX (derate 4.5mW//°C above +70°C)............362mW 14-Pin TSSOP (derate 9.1mW/°C above +70°C).........727mW 14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW Operating Temperature Range .........................-55°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CABSOLUTE MAXIMUM RATINGSMAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS —T A = +25°C (continued)(V= +5.0V, V = 0, V = 0, V = V /2, R = ∞to V /2, unless otherwise noted.)Note 1: Guaranteed by design.Note 2:Specifications are 100% tested at T A = +25°C (exceptions marked). All temperature limits are guaranteed by design.ELECTRICAL CHARACTERISTICS —T A = -40°C to +125°CM A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op Amps 4_______________________________________________________________________________________Typical Operating Characteristics(V DD = +5V, V SS = 0, V CM = V DD /2, R L = ∞to V DD /2, unless otherwise noted.)GAIN AND PHASE vs. FREQUENCY (C L = 0)FREQUENCY (Hz)100100k1M10M1k10k100MG A I N (d B ) P H A S E (D E G R E E S )80-200-160-120-80-40400GAIN AND PHASE vs.FREQUENCY WITH CAPACITIVE LOADFREQUENCY (Hz)100100k1M10M1k10k100MG A I N (d B ) P H A S E (D E G R E E S )80-200-160-120-80-4040010100k10M1k10010k1M POWER-SUPPLY REJECTION RATIOvs. FREQUENCYM A X 4484 t o c 03FREQUENCY (Hz)P S R R (d B )-30-20-100-70-60-50-40-80100.51.01.52.02.53.0-40-2020406080100120SUPPLY CURRENT vs. TEMPERATUREM A X 4484 t o c 04TEMPERATURE (°C)C U R R E N T (m A )0.0110.1100101k 10k 10010k1k100k1M10MOUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)O U T P U T I M P E D A N C E (Ω)0.20.10.50.40.30.70.80.60.9-402040-206080100120INPUT OFFSET VOLTAGE vs. TEMPERATUREM A X 4484 t o c 06TEMPERATURE (°C)V O S (m V )10152025303540-400-2020406080100120OUTPUT VOLTAGE HIGH vs. TEMPERATURETEMPERATURE (°C)|V D D - V O U T | (m V )024681012-400-2020406080100120OUTPUT VOLTAGE LOW vs. TEMPERATURETEMPERATURE (°C)|V O U T - V S S | (m V )NONINVERTING SMALL- SIGNAL TRANSIENT RESPONSEMAX4484 toc091µs/divINOUT50mV/divMAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps_______________________________________________________________________________________5NONINVERTING LARGE-SIGNALTRANSIENT RESPONSEMAX4484 toc10400ns/divINOUT2V/div10152520303540206080100120PERCENT OVERSHOOT vs. CAPACITIVE LOADC LOAD (pF)P E R C E N T O V E R S H O O T (%)40605080701009011010015050200250300LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE LOW|V OUT - V SS | (mV)G A I N (d B )406050807010090110010015050200250300LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE HIGH|V DD - V OUT | (mV)G A I N (d B )-60-40-50-20-30-1001001k10k100k1M10M100M CROSSTALK vs. FREQUENCYM A X 4484 t o c 14FREQUENCY (Hz)C R O S S T A L K (d B )-90-70-80607065807585901.0 1.52.0 2.53.0POWER-SUPPLY REJECTION RATIOvs. OPERATING VOLTAGESUPPLY VOLTAGE (V)P S R R (d B )45555040Typical Operating Characteristics (continued)(V DD = +5V, V SS = 0, V CM = V DD /2, R L = ∞to V DD /2, unless otherwise noted.)0.0010.010.110.0110.1101001000TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCYFREQUENCY (kHz)T H D + N (%)0.040.060.080.100.120.1401.01.50.52.02.53.03.5TOTAL HARMONIC DISTORTION PLUS NOISE vs. AMPLITUDEV IN (Vp-p)T H D + N (%)0.0200.040.060.080.100.120.140 1.0 1.50.5 2.0 2.5 3.0 3.5TOTAL HARMONIC DISTORTION PLUS NOISE vs. AMPLITUDEV IN (Vp-p)T H D + N (%)0.020M A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op Amps 6_______________________________________________________________________________________Detailed DescriptionRail-to-Rail Output StageThe MAX4484/MAX4486/MAX4487 can drive a 2k Ωload and still swing within 50mV of the supply rails.Figure 1 shows the output swing of the MAX4484 con-figured with A V = +1V/V.Driving Capacitive LoadsDriving a capacitive load can cause instability in many op amps, especially those with low quiescent current.The MAX4484/MAX4486/MAX4487 are unity-gain stable for a range of capacitive loads up to 100pF. Figure 2shows the response of the MAX4484 with an excessive capacitive load. Adding a series resistor between the output and the load capacitor (Figure 3) improves the circuit ’s response by isolating the load capacitance from the op amp ’s output.Applications InformationPower Supplies and LayoutThe MAX4484/MAX4486/MAX4487 operates from a sin-gle +2.7V to +5.5V power supply. Bypass the power supply with 0.1µF capacitor to ground.Good layout techniques optimize performance by decreasing the amount of stray capacitance at the op amp ’s inputs and outputs. To decrease stray capaci-tance, minimize trace lengths by placing external com-ponents close to the op amp ’s pins. Use surface-mount components for best results.Pin DescriptionMAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps_______________________________________________________________________________________71µs/divFigure 2. Small-Signal Transient Response with Excessive Capacitive Load (C L = 270pF)Figure 1. Rail-to-Rail Output OperationChip InformationTRANSISTOR COUNT:MAX4484: 101MAX4486: 202MAX4487: 404Figure 3. Capacitive-Load-Driving Circuit400µs/divM A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op Amps 8_______________________________________________________________________________________Package InformationMAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps_______________________________________________________________________________________9Package Information (continued)M A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op Amps 10______________________________________________________________________________________Package Information (continued)MAX4484/MAX4486/MAX4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op Amps______________________________________________________________________________________11Package Information (continued)M A X 4484/M A X 4486/M A X 4487Single/Dual/Quad, Low-Cost, Single-Supply7MHz, Rail-to-Rail Op AmpsMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embod ied in a Maxim prod uct. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.12____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.Package Information (continued)。