The ISO72x-Q1 is a digital isolator with a logic input and output buffer separated by a silicon oxide (SiO₂) insulation barrier. This barrier provides galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, this device prevents noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

The capacitive isolation barrier conditions, translates to a balanced signal, then differentiates a binary input signal. 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 sent across the barrier ensures the proper dc level of the output. On failure to receive this dc refresh pulse for more than 4 µs, the response of the device is as if the input is or not actively driven, and the failsafe circuit drives the output to a logic-high state.

The symmetry of the dielectric and capacitor within the integrated circuitry provides for close capacitive matching and allows fast transient voltage changes between the input and output grounds without corrupting the output. The small capacitance and resulting time constant provide for fast operation with signaling rates⁽¹⁾ from 0 Mbps (dc) to 100 Mbps.

The device requires 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. The device has a TTL input threshold and a noise filter at the input that prevents transient pulses of up to 2 ns in duration from being passed to the output of the device.

The ISO722-Q1 device includes an active-low output enable that, when driven to a high logic level, places the output in a high-impedance state and turns off internal bias circuitry to conserve power.

The ISO72x-Q1 is characterized for operation over the ambient temperature range of –40°C to 125°C.

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
  • Device Temperature Grade 1: –40oC to 125oC Ambient Operating Temperature Range
  • Device HBM ESD Classification Level H2
  • Device CDM ESD Classification Level C5
• 4000-V(peak) Isolation
  • UL 1577, IEC 60747-5-2 (VDE0884, Rev2), IEC61010-1
  • 50-kV/s Transient Immunity (Typ)
• Signaling Rate 0 Mbps to 100 Mbps
  • Low Propagation Delay
  • Low Pulse Skew (Pulse-Width Distortion)
• Low-Power Sleep Mode
• High Electromagnetic Immunity
• Low Input Current Requirement
• Failsafe Output
• Drop-In Replacement for Most Optical and Magnetic Isolators

(1) The signaling rate of a line is the number of voltage transitions that occur per second, expressed in the units bps (bits per second).

• Integrated isolated power
• No
• Number of channels (#)
• 1
• Forward/reverse channels
• 1 forward / 0 reverse
• Isolation rating (Vrms)
• 2500
• Data rate (Max) (Mbps)
• 100
• Rating
• Automotive
• Surge voltage capability (Vpk)
• 4000
• Current consumption per channel (DC) (Typ) (mA)
• 4.3
• Operating temperature range (C)
• -40 to 125
• Default output
• High
• Supply voltage (Max) (V)
• 5
• Supply voltage (Min) (V)
• 3
• Propagation delay (Typ) (ns)
• 19

ISO721-Q1的完整型号有：ISO721QDRQ1，以下是这些产品的关键参数及官网采购报价：

ISO721QDRQ1，工作温度：-40 to 125，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网ISO721QDRQ1的批量USD价格：2.23（1000+）

DIGI-ISO-EVM — Universal digital isolator evaluation module

DIGI-ISO-EVM 是一个评估模块，用于评估 TI 采用以下五种不同封装的任何单通道、双通道、三通道、四通道或六通道数字隔离器器件：8 引脚 NB SOIC (D)、8 引脚 WB SOIC (DWV)、16 引脚 WB SOIC (DW)、16 引脚 Ultra WB SOIC (DWW) 和 16 引脚 QSOP (DBQ) 封装。此 EVM 具有足够的 Berg 引脚选项，支持使用超少的外部元件来评估相应器件。