ISO7221A-Q1 - 汽车类双通道 1/1 1Mbps 数字隔离器

ISO7221A-Q1是TI德州仪器公司的一款无产品，ISO7221A-Q1是汽车类双通道 1/1 1Mbps 数字隔离器，本站介绍了ISO7221A-Q1的封装应用图解、特点和优点、功能等，并给出了与ISO7221A-Q1相关的TI元器件型号供参考。

ISO7221A-Q1 - 汽车类双通道 1/1 1Mbps 数字隔离器 - 无 - 数字隔离器 - 德州仪器

产品描述

The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220 and in opposite directions in the ISO7221. 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 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, and 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 4µs, 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 25 Mbps.The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).The A-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.

These devices require two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

These devices are characterized for operation over the ambient temperature range of –40°C to 125°C.

产品特性

Qualified for Automotive Applications
1-Mbps and 25-Mbps Signaling Rate Options
- Low Channel-to-Channel Output Skew: 1ns(Max)
- Low Pulse-Width Distortion (PWD): 1ns(Max)
- Low Jitter Content: 1 ns (Typ) at 150 Mbps
25-Year (Typ) Life at Rated Voltage (See Application Report SLLA197 and )
4000-Vpeak Isolation, 560 Vpeak VIORM
- UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2), IEC 61010-1, IEC 60950-1 and CSA Approved
- 50 kV/µs Typical Transient Immunity
Operates with 3.3-V or 5-V Supplies
4 kV ESD Protection
High Electromagnetic Immunity
–40°C to 125°C Operating Free-Air Temperature Range

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