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MAX5177BEEE+中文资料

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ELECTRICAL CHARACTERISTICS—MAX5175

Applications
Digitally Programmable 4–20mA Current Loops Industrial Process Controls Digital Offset and Gain Adjustment Motion Control Automatic Test Equipment (ATE) Remote Industrial Controls µP-Controlled Systems
TOP VIEW
FB 1 OUT 2 RS 3 PDL 4 CLR 5 CS 6 DIN 7 SCLK 8
Pin Configuration
16 VDD 15 N.C. 14 REF
MAX5175 MAX5177
13 AGND 12 SHDN 11 UPO 10 DOUT 9 DGND
QSOP 1
________________________________________________________________ Maxim Integrated Products
Functional Diagram appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
元器件交易网
19-1477; Rev 0; 4/99
Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output
General Description
The MAX5175/MAX5177 low-power, serial, voltage-output, 12-bit digital-to-analog converters (DACs) feature a precision output amplifier in a space-saving 16-pin QSOP package. The MAX5175 operates from a single +5V supply, and the MAX5177 operates from a single +3V supply. The output amplifier’s inverting input is available to allow specific gain configurations, remote sensing, and high output current capability. This makes the MAX5175/MAX5177 ideal for a wide range of applications, including industrial process control. Both devices draw only 260µA of supply current, which reduces to 1µA in shutdown mode. In addition, the programmable power-up reset feature allows for a userselectable output voltage state of either 0 or midscale. The 3-wire serial interface is compatible with SPI™, QSPI™, and MICROWIRE™ standards. An input register followed by a DAC register provides a double-buffered input, allowing the registers to be updated independently or simultaneously with a 16-bit serial word. Additional features include software and hardware shutdown, shutdown lockout, a hardware reset pin, and a reference input capable of accepting DC and offset AC signals. These devices provide a programmable digital output pin for added functionality and a serial-data output pin for daisy-chaining. All logic inputs are TTL/CMOS compatible and are internally buffered with Schmitt triggers to allow direct interfacing to optocouplers. The MAX5175/MAX5177 incorporate a proprietary on-chip circuit that keeps the output voltage virtually “glitch free,” limiting the glitches to a few millivolts during power-up. Both devices come in 16-pin QSOP packages and are specified for the extended (-40°C to +85°C) temperature range. The MAX5171/MAX5173 are 14-bit pin-compatible upgrades to the MAX5175/MAX5177. For pin-compatible DACs with an internal reference, see the 13-bit MAX5132/MAX5133 and 12-bit MAX5122/MAX5123. o ±1 LSB INL o 1µA Shutdown Current o “Glitch Free” Output Voltage at Power-Up o Single-Supply Operation +5V (MAX5175) +3V (MAX5177) o Full-Scale Output Range +2.048V (MAX5177, VREF = +1.25V) +4.096V (MAX5175, VREF = +2.5V) o Rail-to-Rail® Output Amplifier o Adjustable Output Offset o Low THD (-80dB) in Multiplying Operation o SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface o Programmable Shutdown Mode and Power-Up Reset (0 or midscale) o Buffered Output Capable of Driving 4–20mA or 5kΩ || 100pF Loads o User-Programmable Digital Output Pin Allows Serial Control of External Components o 14-Bit Upgrades Available (MAX5171/MAX5173)
Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output MAX5175/MAX5177
ABSOLUTE MAXIMUM RATINGS
VDD to AGND, DGND ...............................................-0.3V to +6V AGND to DGND.....................................................-0.3V to +0.3V Digital Inputs to DGND.............................................-0.3V to +6V DOUT, UPO to DGND ................................-0.3V to (VDD + 0.3V) FB, OUT REF to AGND...............................-0.3V to (VDD + 0.3V) Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8mW/°C above +70°C)...............667mW Operating Temperature Range .............................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C

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MAX471MAX472的中文资料大全

MAX471MAX472的中文资料大全

M A X471M A X472的中文资料大全(总4页)-本页仅作为预览文档封面，使用时请删除本页-MAX471/MAX472的特点、功能美国美信公司生产的精密高端电流检测放大器是一个系列化产品，有MAX471/MA X472、 MAX4172/MAX4173等。

它们均有一个电流输出端，可以用一个电阻来简单地实现以地为参考点的电流/电压的转换，并可工作在较宽电压内。

MAX471/MAX472具有如下特点：●具有完美的高端电流检测功能；●内含精密的内部检测电阻（MAX471）；●在工作温度范围内，其精度为2%；●具有双向检测指示，可监控充电和放电状态；●内部检测电阻和检测能力为3A，并联使用时还可扩大检测电流范围；●使用外部检测电阻可任意扩展检测电流范围（MAX472）；●最大电源电流为100μA；●关闭方式时的电流仅为5μA；●电压范围为3～36V；●采用8脚DIP/SO/STO三种封装形式。

MAX471/MAX472的引脚排列如图1所示，图2所示为其内部功能框图。

表1为MAX471/MAX472的引脚功能说明。

MAX471的电流增益比已预设为500μA/A，由于2kΩ的输出电阻（ROUT）可产生1V/A的转换，因此±3A时的满度值为3V.用不同的ROUT电阻可设置不同的满度电压。

但对于MAX471，其输出电压不应大于VRS+。

对于MAX472，则不能大于。

MAX471引脚图如图１所示，MAX472引脚图如图２所示。

MAX471/MAX472的引脚功能说明引脚名称功能MAX471MAX47211SHDN关闭端。

正常运用时连接到地。

当此端接高电平时，电源电流小于5μA2，3-RS+内部电流检测电阻电池（或电源端）。

“+”仅指示与SIGN输出有关的流动方向。

封装时已将2和3连在了一起-2空脚-3RG1增益电阻端。

通过增益设置电阻连接到电流检测电阻的电池端44GND地或电池负端55SIGN集电极开路逻辑输出端。

MAX491EESD+中文资料

MAX491EESD+中文资料


Driver Input Voltage (DI).............................-0.5V to (VCC + 0.5V)
Driver Output Voltage (Y, Z; A, B) ..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
元器件交易网
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
General Description
The MAX481E, MAX483E, MAX485E, MAX487E– MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electro-static discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.
MAX31785中文资料

MAX31785中文资料

_________________________________________________________________Maxim Integrated Products __1本文是英文数据资料的译文，文中可能存在翻译上的不准确或错误。

如需进一步确认，请在您的设计中参考英文资料。

有关价格、供货及订购信息，请联络Maxim 亚洲销售中心：10800 852 1249 (北中国区)，10800 152 1249 (南中国区)，或访问Maxim 的中文网站： 。

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。

MAX1771ESA+中文资料

MAX1771ESA+中文资料


MAX1771
Ordering Information
PART MAX1771CPA MAX1771CSA MAX1771C/D MAX1771EPA MAX1771ESA MAX1771MJA TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP**
ELECTRICAL CHARACTERISTICS
(V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Input Voltage Range Minimum Start-Up Voltage Supply Current Standby Current Output Voltage (Note 1) Output Voltage Line Regulation (Note 2) Output Voltage Load Regulation (Note 2) Maximum Switch On-Time Minimum Switch Off-Time Efficiency tON(max) tOFF(min) V+ = 5V, VOUT = 12V, ILOAD = 500mA, Circuit of Figure 2a MAX1771C Reference Voltage VREF IREF = 0µA MAX1771E MAX1771M REF Load Regulation REF Line Regulation FB Trip Point Voltage VFB 0µA ≤ IREF ≤ 100µA 3V ≤ V+ ≤ 16.5V MAX1771C MAX1771E MAX1771M 1.4700 1.4625 1.4550 MAX1771C/E MAX1771M 1.4700 1.4625 1.4550 V+ = 16.5V, SHDN = 0V (normal operation) V+ = 10V, SHDN ≥ 1.6V (shutdown) V+ = 16.5V, SHDN ≥ 1.6V (shutdown) V+ = 2V to 12V, over full load range, Circuit of Figure 2a V+ = 5V to 7V, VOUT = 12V ILOAD = 700mA, Circuit of Figure 2a V+ = 6V, VOUT = 12V, ILOAD = 0mA to 500mA, Circuit of Figure 2a 12 1.8 11.52 SYMBOL CONDITIONS MAX1771 (internal feedback resistors) MAX1771C/E (external resistors) MAX1771MJA (external resistors) MIN 2.0 3.0 3.1 1.8 85 2 4 12.0 5 12.48 TYP MAX 12.5 16.5 16.5 2.0 110 5 V µA µA V mV/V V UNITS