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Analog Devices Inc. LT6118IMS8#TRPBF
- Part No.:
- LT6118IMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT6118IMS8#TRPBF.pdf
- Description:
- IC CURRENT SENSE 0.2% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,331
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Product details
Overview
LT6118IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-side current sense amplifier with integrated 400mV precision reference and latching comparator, designed for overcurrent fault detection in industrial and automotive power systems. It delivers 200µV max input offset, 0.2% max gain error, 1MHz bandwidth, and 1.4µs total propagation delay - enabling fast-acting protection in motor control and battery monitoring applications.
For engineers reviewing the LT6118IMS8#TRPBF datasheet, LT6118IMS8#TRPBF pinout, LT6118IMS8#TRPBF application, or LT6118IMS8#TRPBF equivalent, key selection factors include its –40°C to 125°C operation, 2.7V–60V supply range, MSOP-8 package compatibility, and independent comparator input/output architecture supporting POR and latch enable/disable control.
Technical Context
The LT6118IMS8#TRPBF integrates a precision current-sense amplifier with forced-feedback topology that drives SENSEHI to match SENSELO potential, enabling accurate high-side sensing up to 60V common-mode. Its comparator uses an internal 400mV reference with ±1.25% total threshold error and 10mV hysteresis, configurable via external resistors without affecting amplifier operation.
Propagation delay is dominated by the 500ns amplifier step response and 0.5µs comparator fall time under 100mV overdrive, yielding a typical total fault response of 1.4µs. The device draws only 450µA supply current at 2.7V and supports full specification across –40°C to 125°C - matching LT6118H grade requirements per ordering code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 60V - enables direct connection to high-voltage bus rails without level-shifting circuitry |
| Input Offset Voltage | ±200µV max - limits minimum resolvable current; e.g., 20mA with 10mΩ shunt yields 200µV signal equal to offset |
| Amplifier Bandwidth | 1MHz - supports real-time error detection in fast-switching motor control loops |
| Comparator Threshold Accuracy | ±1.25% total error - ensures reliable trip point setting for overcurrent thresholds down to ±5mV absolute error |
| Propagation Delay | 1.4µs typical - allows sub-microsecond fault capture before destructive energy accumulates |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial ambient environments |
| Package | 8-lead MSOP - surface-mount footprint with 163°C/W junction-to-ambient thermal resistance |
Pinout & Package
LT6118IMS8#TRPBF is housed in an 8-lead plastic MSOP package (θJA = 163°C/W). Pin 9 (exposed pad) is not present in MSOP; it applies only to DFN variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSELO (Pin 1) | Sense amplifier non-inverting input | Connected to load side of shunt resistor; establishes reference node for differential sensing |
| LE (Pin 2) | Latch enable control | High = comparator output latches low on trip; low = transparent comparator mode with POR reset |
| OUTC (Pin 3) | Open-drain comparator output | Sinks current up to 500µA; supports pull-up to voltages up to 60V above V–, enabling level-shifted digital interfacing |
| V– (Pin 4) | Negative supply rail | Typically grounded; serves as return path for supply current and amplifier output current |
| INC (Pin 5) | Comparator inverting input | Internally referenced to 400mV; external resistor divider sets actual trip point relative to SENSELO voltage |
| OUTA (Pin 6) | Current-output amplifier | Sources IOUTA = VSENSE/RIN; requires external ROUT to ground to generate voltage output |
| V+ (Pin 7) | Positive supply / high-side rail | Connects directly to high-side of shunt; supplies operating current and defines common-mode range |
| SENSEHI (Pin 8) | Sense amplifier inverting input | Driven to match SENSELO potential; connects to source side of shunt via Kelvin trace for accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 400mV reference | Eliminates external reference IC; ±1.25% threshold error enables precise overcurrent trip without calibration |
| Latching comparator with POR | Enables persistent fault flagging until manual reset; POR ensures known state at power-up without external logic |
| Independent comparator I/O | Allows separate configuration of trip point and amplifier gain - no shared resistor networks or performance trade-offs |
| 1.4µs total propagation delay | Supports <1µs fault response in safety-critical systems like EV battery disconnects and servo drive protection |
| 2.7V–60V wide supply range | Operates directly from 3.3V logic rails or 48V/60V industrial buses - no auxiliary supply needed |
Applications
| Motor Control Overcurrent Protection | Battery Pack Fault Monitoring |
|---|---|
Use Scenario: Real-time current monitoring in BLDC motor phase legs during PWM commutation. IC Role / Device Role / Timing Role: High-side current sense amplifier and latched fault detector; provides <1.4µs response to short-circuit events. Use Value: Prevents IGBT/MOSFET destruction by triggering gate driver shutdown before peak fault current exceeds SOA limits. | Use Scenario: Cell-level or pack-level overcurrent detection in 12V–48V lithium-ion battery management systems. IC Role / Device Role / Timing Role: Precision shunt-based current monitor with latched comparator output for BMS interrupt signaling. Use Value: Enables immediate disconnection via solid-state relay or fuse control while maintaining fault state for diagnostics. |
| Automotive Load Dump Protection | Industrial Power Supply OCP |
Use Scenario: Monitoring alternator output or DC-DC converter output in automotive ECUs subjected to ISO 7637-2 load dump transients. IC Role / Device Role / Timing Role: High-common-mode current sensor with 60V rating and 125°C operation; comparator flags overcurrent during transient recovery. Use Value: Survives 60V transients while delivering accurate current data - avoids false trips during voltage spikes. | Use Scenario: Secondary-side current limiting in isolated 24V/48V industrial SMPS units with remote sense capability. IC Role / Device Role / Timing Role: High-side sense amplifier feeding analog-to-digital converter and latched comparator for hardware OCP lockout. Use Value: Provides dual-path protection - fast analog shutdown plus digitized current logging for root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier with comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4008AASA+ | Fixed 20V max common-mode; no integrated reference; comparator lacks POR and latch disable | Requires external 2.5V reference and reset logic; limited to ≤20V systems | Choose when cost sensitivity outweighs 60V range and latch flexibility needs |
| INA301AIDR | Fixed 36V max common-mode; integrated 0.6V reference; no latch enable/disable control | Lacks LE pin - comparator always latches; no transparent mode or POR reset | Prefer when simplified single-function fault flag suffices and 36V range is adequate |
Compared with MAX4008AASA+ and INA301AIDR, the LT6118IMS8#TRPBF offers wider 60V common-mode operation, user-configurable latch behavior via LE pin, and guaranteed –40°C to 125°C performance - making it uniquely suitable for automotive under-hood and industrial high-voltage OCP where flexibility and ruggedness are critical.
Availability
LT6118IMS8#TRPBF is available at Aetrix Electronics and suitable for motor control overcurrent protection, battery pack fault monitoring, and automotive load dump protection requiring stable component supply across extended temperature ranges.
Supply support for LT6118IMS8#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance analog portfolio, including precision current sensing solutions for demanding industrial and automotive applications.
The LT6118 product line was designed specifically for high-speed, high-accuracy high-side current monitoring with integrated fault detection - targeting applications where fast reaction to overcurrent events is essential for system reliability.
FAQ
What is the maximum common-mode voltage supported by the LT6118IMS8#TRPBF?
The LT6118IMS8#TRPBF supports a maximum common-mode voltage of 60V between V+ and V–, with additional ratings specifying maximum V+ – (SENSELO or SENSEHI) at 33V. This enables direct high-side sensing on 48V industrial buses and automotive 24V/48V systems. The device remains fully specified across its –40°C to 125°C operating range under these conditions, and the LT6118IMS8#TRPBF's MSOP-8 package is rated for this voltage stress.
Does the LT6118IMS8#TRPBF require external components to set the current sense gain?
Yes, the LT6118IMS8#TRPBF requires two external resistors: RIN between SENSEHI and V+ sets the amplifier's transconductance gain (IOUTA = VSENSE/RIN), and ROUT from OUTA to V– converts output current to voltage (VOUT = IOUTA × ROUT). Gain is thus determined by ROUT/RIN, and the LT6118IMS8#TRPBF datasheet provides example configurations for gains of 20, 50, and 100. No internal gain-setting resistors are present.
How does the LE pin function on the LT6118IMS8#TRPBF?
The LE (Latch Enable) pin on the LT6118IMS8#TRPBF controls comparator latch behavior: when LE is high, the comparator output latches low upon trip and remains latched until power cycle or external reset; when LE is low, the comparator operates transparently with automatic reset on power-up (POR). This dual-mode capability allows the LT6118IMS8#TRPBF to serve both persistent fault flagging and dynamic overcurrent monitoring roles in the same design.
What is the purpose of the internal 400mV reference in the LT6118IMS8#TRPBF?
The internal 400mV reference in the LT6118IMS8#TRPBF serves as the comparator's non-inverting input reference voltage, enabling precise overcurrent trip point definition without external components. The comparator compares the amplified sense voltage (at INC) against this reference, with ±1.25% total threshold error and 10mV hysteresis. This eliminates the need for an external precision reference IC, reducing BOM count and layout complexity in the LT6118IMS8#TRPBF-based current protection circuits.
Can the LT6118IMS8#TRPBF be used in systems with supply voltages below 3V?
Yes, the LT6118IMS8#TRPBF is fully specified down to 2.7V supply voltage, with 450µA typical supply current at that level. Its amplifier maintains 200µV max offset and 1MHz bandwidth, and the comparator retains 400mV reference accuracy and 500ns response time. This makes the LT6118IMS8#TRPBF suitable for low-voltage battery-powered equipment such as portable medical devices and IoT edge nodes where 3.3V or lower rails are standard.
LT6118IMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Sense
- Sensing Method:
- High-Side
- Accuracy:
- ±0.2%
- Voltage - Input:
- 2.7V ~ 60V
- Current - Output:
- 1mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT6118IMS8#TRPBF FAQ
1.How can I place an order for LT6118IMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6118IMS8#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT6118IMS8#TRPBF reliable?
The price and inventory of LT6118IMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6118IMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6118IMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6118IMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6118IMS8#TRPBF?
LT6118IMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6118IMS8#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT6118IMS8#TRPBF?
For technical support, including LT6118IMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6118IMS8#TRPBF requirements.
6.How does Aetrix verify that LT6118IMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6118IMS8#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT6118IMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6118IMS8#TRPBF?
All LT6118IMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6118IMS8#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT6118IMS8#TRPBF part is unused and in its original packaging.
Return procedure for LT6118IMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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