規格
| 屬性 | 價值 |
| Supplier | Analog Devices Inc. |
| Package / Case | Tube |
| Series | LT® |
| Part Status | Active |
| Amplifier Type | General Purpose |
| Number of Circuits | 2 |
| Output Type | Rail-to-Rail |
| Slew Rate | 0.4V/µs |
| Gain Bandwidth Product | 850 kHz |
| Current - Input Bias | 100 pA |
| Voltage - Input Offset | 25 µV |
| Supply Current | 850µA (x2 Channels) |
| Current - Output / Channel | 40 mA |
| Voltage - Supply Span(Min) | 2.7 V |
| Voltage - Supply Span(Max) | 36 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
概述
Description
LT1881AIS8 is Linear Technology’s LT1881 in an AIS8 (8-pin) package. The LT1881 is a fast, precision comparator used in power-electronics sensing and protection (examples: zero-cross detection, undervoltage/overvoltage monitoring, and current-sense applications). The AIS8 suffix just indicates the package type/revision.
Key points:
- Used to compare a sensed voltage against a reference and switch outputs quickly.
- Commonly implemented in power supplies, motor drivers, battery chargers, and protection circuits.
- Exact electrical specs (supply range, input common-mode, offset, propagation delay, output type) vary by variant; consult the LT1881 datasheet for the AIS8 version for precise figures and pinout. If you have a specific application or operating conditions, I can tailor the overview.
Key points:
- Used to compare a sensed voltage against a reference and switch outputs quickly.
- Commonly implemented in power supplies, motor drivers, battery chargers, and protection circuits.
- Exact electrical specs (supply range, input common-mode, offset, propagation delay, output type) vary by variant; consult the LT1881 datasheet for the AIS8 version for precise figures and pinout. If you have a specific application or operating conditions, I can tailor the overview.
Equivalent
LT1881AIS8 is a high-side current-sense monitor (8‑pin MSOP). Common equivalents:
- TI INA188 (and related INA180/INA181/INA182)
- Analog Devices AD8210/AD8212
- Maxim MAX4080/MAX4081
Note: check sense voltage range, gain, supply voltage, and output type to ensure true pin-for-pin compatibility.
- TI INA188 (and related INA180/INA181/INA182)
- Analog Devices AD8210/AD8212
- Maxim MAX4080/MAX4081
Note: check sense voltage range, gain, supply voltage, and output type to ensure true pin-for-pin compatibility.
Features
LT1881AIS8 is a high-side current-sense monitor. Key features (high level):
- Monitors current across a shunt resistor on the high side
- Wide common-mode/input range for high-voltage sensing
- Output proportional to sensed current (gain set with external components)
- Single-supply operation; logic-friendly output
- Low quiescent current with fast response
- Fault protection: overcurrent/short-circuit protection, overtemperature protection
- Input/output protection and robustness for transients
- 8-pin package (AIS8); automotive-grade variants available for harsh environments
Note: exact electrical characteristics (ranges, gains, thresholds) vary by variant. Check the official LT1881AIS8 datasheet for precise specs.
- Monitors current across a shunt resistor on the high side
- Wide common-mode/input range for high-voltage sensing
- Output proportional to sensed current (gain set with external components)
- Single-supply operation; logic-friendly output
- Low quiescent current with fast response
- Fault protection: overcurrent/short-circuit protection, overtemperature protection
- Input/output protection and robustness for transients
- 8-pin package (AIS8); automotive-grade variants available for harsh environments
Note: exact electrical characteristics (ranges, gains, thresholds) vary by variant. Check the official LT1881AIS8 datasheet for precise specs.
Pinout
- Pin count: 8 pins (8-pin package, e.g., SOIC/MSOP variant AIS8).
- Function: High-speed voltage comparator (precision comparator used for threshold detection and digital output signaling).
- Function: High-speed voltage comparator (precision comparator used for threshold detection and digital output signaling).
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits; it acquired Linear Technology in 2017, which originally developed the LT1881.
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits; it acquired Linear Technology in 2017, which originally developed the LT1881.
Application
LT1881AIS8 is a high‑side current‑sense monitor designed for precision current measurement. Typical application areas include:
- High‑side current sensing in switching regulators/DC‑DC converters
- Battery‑management systems and pack monitoring
- Motor control sensing and protection
- Overcurrent/short‑circuit protection on power rails
- Automotive and industrial sensing in harsh environments
- Instrumentation and data‑acquisition requiring accurate current readouts
- High‑side current sensing in switching regulators/DC‑DC converters
- Battery‑management systems and pack monitoring
- Motor control sensing and protection
- Overcurrent/short‑circuit protection on power rails
- Automotive and industrial sensing in harsh environments
- Instrumentation and data‑acquisition requiring accurate current readouts
Package
LT1881AIS8 comes in an 8-pin Small Outline package (SOIC-8).
