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ISO7221ADR  IC DGTL ISO 2CH CMOS 1MBPS 8SOIC
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数量
 PCS
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合计 ¥0.00
 
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产品详情
型号ISO7221ADR
封装8-SOIC
品牌Texas Instruments
描述IC DGTL ISO 2CH CMOS 1MBPS 8SOIC
 规格书点击查看

Texas Instruments ISO7221ADR

The ISO7220x and ISO7221x family devices are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220x and in opposite directions in the ISO7221x. These devices have a logic input and output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to 4000 VPK per VDE. Used in conjunction with isolated power supplies, these devices block high voltage and isolate grounds, as well as prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received every 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (DC) to 150 Mbps (The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps). The A-option, B-option, and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS VCC/2 input thresholds and do not have the input noise filter and the additional propagation delay.

The ISO7220x and ISO7221x family of devices require two supply voltages of 2.8 V (C-Grade), 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 2.8-V or 3.3-V supply and all outputs are 4-mA CMOS.

The ISO7220x and ISO7221x family of devices are characterized for operation over the ambient temperature range of –40°C to +125°C.

德克萨斯仪器iso7221adr
的iso7220x和iso7221x家庭设备是双通道数字隔离器。为了便于PCB布局,渠道都指向同一个方向在iso7220x在相反方向的iso7221x。这些设备有一个逻辑输入和输出缓冲器采用TI公司的二氧化硅(SiO2)分离的隔离屏障,提供多达4000个VPK每VDE电气隔离。与单独的电源一起使用,这些设备阻塞高电压和隔离的理由,以及防止数据总线或其他电路上的噪声电流进入当地的地面,干扰或损坏敏感电路。
二进制输入信号被调节,转换成平衡信号,然后由电容隔离屏障区分。在隔离屏障上,差分比较器接收逻辑转换信息,然后相应地设置或复位触发器和输出电路。周期性的更新脉冲通过屏障发送,以确保输出的直流电平正确。如果这个DC刷新脉冲不接受每4µ,输入被假定为无动力或不积极推动,和故障保护电路驱动输出为逻辑高状态。
小电容和由此产生的时间常数提供了从0 Mbps(DC)到150 Mbps的信号速率的快速操作(一行的信令速率是每秒以单位BPS表示的电压转换的数量)。的a-option,b-option,和c-option设备TTL输入阈值和输入,防止瞬态脉冲被传递到该设备的输出噪声滤波器。的m-option器件CMOS的VCC / 2输入阈值和没有输入噪声滤波器和额外的传输延迟。
的iso7220x和iso7221x家庭设备需要2.8伏两电源电压(C级),3.3 V,5 V,或任何组合。所有输入5V宽容时提供一个3.3V电源与2.8-V或输出4-MA CMOS。
的iso7220x和iso7221x家庭设备的特点是工作在–40°C环境温度范围为±125°C.
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2017/4/21 17:22:38(时间)
 AM26C31IDR|BQ32000DR|CD4021BM96|CD4051BM96|LM158JG|BQ2057WTS|ISO7221ADRG4|LM22676TJ-5.0/NOPB|ADC0832CCN|CD4049UBDR|DRV602PWR|ISO7221ADR|LM1117MP-1.8/NOPB|BQ2057WTSTRG4|CD4021BM96E4|CD4051BM96G3|INA199A1DCKT|CD4051BM96G3|CD4052BM96E4|INA199A1DCKR|INA199B1DCKR|BQ2057WTSTR|CC1101RGPR|CC2540F256RHAT|CD4052BM96|LM1085ISX-5.0/NOPB|ADS1110A0IDBVR|CC2540F256RHAR|CD4051BM96E4|CD4052BM96G3|ADS1110A0IDBVRG4|CD4052BM96G4|DRV8800PWPR|DRV8801PWPR|LM1117MPX-3.3/NOPB|AM26C31IDRG4|BQ2057WTSTR|BQ2057WTSTR/2K|CD4049UBDRE4|CD4051BM96G4|DS14C88MX|BQ2002ESNTRG4|BQ2057WTSG4|DP83848KSQ/NOPB|DS14C88MX/NOPB|INA194AIDBVTG4|ADC0832CCN/NOPB|CD4049UBDRG4|LM22676MRX-ADJ/NOPB|
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