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Analog Devices Inc. LT6118IMS8#PBF
- Part No.:
- LT6118IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT6118IMS8#PBF.pdf
- Description:
- IC CURRENT SENSE 0.2% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,688
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Product details
Overview
LT6118IMS8#PBF from Analog Devices (formerly Linear Technology) is a high-side current sense amplifier with integrated 400mV precision reference and latching comparator, designed for fast overcurrent protection 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 reliable fault detection in motor control and battery monitoring.
For engineers reviewing the LT6118IMS8#PBF datasheet, LT6118IMS8#PBF pinout, LT6118IMS8#PBF application, or LT6118IMS8#PBF equivalent, key selection criteria 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 functionality.
Technical Context
The LT6118IMS8#PBF implements a high-impedance current-output sense amplifier that forces SENSEHI to match SENSELO potential, generating IOUTA = VSENSE/RIN. Its comparator uses an internal 400mV reference with ±1.25% threshold accuracy and 10mV hysteresis, configurable via external resistors without affecting amplifier operation.
Propagation delay (1.4µs typ), step response (500ns), and 1MHz signal bandwidth are specified across full temperature range. The device supports true high-side sensing with V+ up to 60V and common-mode input range up to V+ – 0.2V on SENSEHI, while maintaining CMRR ≥110dB at 60V common-mode voltage.
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 - ensures accurate low-current measurement down to ~20mA with 10mΩ shunt. |
| Gain Error | ±0.2% max - maintains system-level current measurement accuracy across voltage and temperature. |
| Comparator Threshold Accuracy | ±1.25% max - guarantees consistent overcurrent trip point under varying supply and thermal conditions. |
| Propagation Delay | 1.4µs typical - allows sub-microsecond fault response for IGBT/MOSFET gate driver shutdown coordination. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial motor drive environments. |
| Package | 8-Lead MSOP - surface-mount footprint compatible with automated assembly and thermal relief design. |
Pinout & Package
The LT6118IMS8#PBF is housed in an 8-lead plastic MSOP package (θJA = 163°C/W). Pin 9 (exposed pad) is not present in MSOP; only DFN variants include it tied to V–.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SENSELO) | Sense amplifier non-inverting input | Connected to load side of shunt resistor; establishes reference node for differential sense voltage. |
| 2 (LE) | Latch enable control | High = comparator output latches low on trip; low = transparent comparator operation with POR reset. |
| 3 (OUTC) | Open-drain comparator output | Drives external pull-up; supports level-shifted logic interface up to 60V above V–. |
| 4 (V–) | Negative supply / ground reference | Common return for amplifier, comparator, and output stage; must be low-impedance path. |
| 5 (INC) | Comparator inverting input | Internally referenced to 400mV; external resistor network sets trip threshold relative to OUTA voltage. |
| 6 (OUTA) | Current-output amplifier output | Sources IOUTA = VSENSE/RIN; requires external ROUT to convert to voltage for comparator or ADC interface. |
| 7 (V+) | Positive supply / high-side rail connection | Accepts up to 60V; supplies internal circuitry and defines common-mode range for SENSEHI/SENSELO. |
| 8 (SENSEHI) | Sense amplifier inverting input | Driven to match SENSELO by internal amplifier; connected to source/rail side of shunt resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 400mV precision reference | Eliminates external reference IC and associated layout complexity while maintaining ±1.25% threshold accuracy over temperature. |
| Latching comparator with POR | Enables persistent fault flagging until manual reset; power-on reset ensures known state at startup without external RC timing. |
| Independent comparator and amplifier paths | Allows separate optimization of gain-setting (RIN/ROUT) and trip threshold (RC) without interaction or calibration coupling. |
| 1.4µs total propagation delay | Supports real-time protection in fast-switching inverters where >100kHz PWM edge rates demand sub-2µs fault response. |
| 200µV max input offset voltage | Permits use of lower-value, lower-power shunt resistors (e.g., 5–10mΩ) while preserving measurement resolution at low load currents. |
Applications
| Motor Control Fault Protection | Battery Management System Monitoring |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC inverter with instantaneous overcurrent shutdown. IC Role / Device Role / Timing Role: High-side current sense amplifier provides isolated, level-shifted analog current feedback; comparator triggers gate driver disable within 1.4µs of fault onset. Use Value: Prevents IGBT destruction during short-circuit events by delivering deterministic fault response faster than PWM switching period. | Use Scenario: Cell-string current monitoring in 48V EV auxiliary battery pack with thermal derating and charge/discharge balancing. IC Role / Device Role / Timing Role: Measures bidirectional shunt voltage with <200µV offset; comparator flags overcharge (>120A) or short-circuit (>300A) conditions. Use Value: Enables precise Coulomb counting and safety cutoff without adding error-prone op-amp/reference discrete solutions. |
| Automotive Power Distribution Unit | Industrial PLC Output Module Protection |
Use Scenario: Load current supervision in 12V/24V vehicle power distribution center with diagnostic reporting and fuseless protection. IC Role / Device Role / Timing Role: High-side sensing on each fused branch; latched comparator output signals microcontroller on sustained overload (>5s) or transient surge (>10ms). Use Value: Replaces electromechanical fuses with programmable, self-resetting protection that logs fault history and supports predictive maintenance. | Use Scenario: Solid-state relay output stage monitoring in modular industrial controller with 2A/24V DC outputs driving solenoids and valves. IC Role / Device Role / Timing Role: Detects open-load, short-circuit, and overtemperature-induced current anomalies; OUTA feeds ADC for closed-loop current regulation. Use Value: Increases system uptime by distinguishing between benign inrush and destructive faults-reducing nuisance trips by >90% vs fixed-threshold comparators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40056ASA+T | Fixed 20V/V gain, no integrated reference/comparator; requires external 1.2V reference and comparator; 1.5µs propagation delay. | Lacks latch/POR functionality; needs additional components for fault flagging; better suited for analog-only feedback loops. | Select when system already includes precision reference and comparator, and board space permits discrete implementation. |
| INA240A1QDRQ1 | Zero-drift architecture, 2.5µV offset, but no integrated comparator or reference; 800kHz bandwidth; AEC-Q100 qualified. | Requires external comparator with hysteresis and reference; higher accuracy at low currents but slower response than LT6118IMS8#PBF. | Select for ultra-low-offset requirements in battery fuel gauging where speed is secondary to DC precision. |
Compared with MAX40056ASA+T and INA240A1QDRQ1, the LT6118IMS8#PBF delivers integrated fault detection with latching and POR in a single MSOP-8 package, reducing BOM count and PCB area while maintaining 1.4µs response - critical for protecting fast-switching power stages.
Availability
LT6118IMS8#PBF is available at Aetrix Electronics and suitable for motor control fault protection, battery management system monitoring, and automotive power distribution requiring stable component supply across extended temperature ranges.
Supply support for LT6118IMS8#PBF 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 full product support, qualification, and manufacturing continuity for all Linear parts including the LT6118 series.
The LT6118 product line was designed specifically for high-reliability, high-speed overcurrent protection in automotive and industrial power systems - integrating precision amplification, reference, and comparator functions into a single robust package.
FAQ
What is the maximum common-mode voltage supported by the LT6118IMS8#PBF?
The LT6118IMS8#PBF supports a maximum common-mode voltage of V+ – 0.2V on SENSEHI and up to 60V on SENSELO, with full specification over 2.7V to 60V supply range. Absolute maximum rating allows V+ to 60V and SENSEHI/SENSELO to V+ + 1V, but operational common-mode range is limited to V+ – 0.2V on SENSEHI per datasheet Figure 2 and Applications Information section.
Does the LT6118IMS8#PBF require external components to set gain and threshold?
Yes, the LT6118IMS8#PBF requires external resistors: RIN between SENSEHI and V+ sets amplifier gain (IOUTA = VSENSE/RIN), and RC between INC and OUTA sets comparator threshold relative to the internal 400mV reference. No external reference or comparator is needed - both are integrated.
Can the LT6118IMS8#PBF operate with a 3.3V supply rail?
Yes, the LT6118IMS8#PBF is fully specified from 2.7V to 60V supply voltage. At 3.3V, it maintains 200µV max input offset, 0.2% max gain error, and 1.4µs propagation delay. Supply current is 450µA typical at 2.7V, making it suitable for low-voltage industrial and portable equipment designs.
How does the LE pin function in the LT6118IMS8#PBF?
The LE (Latch Enable) pin on the LT6118IMS8#PBF controls comparator latch behavior: when LE is high, the comparator output latches low upon trip and remains latched until power cycle or LE low pulse; when LE is low, the comparator operates transparently with automatic power-on reset. Minimum LE pulse width is 2µs per datasheet Note 9.
Is the LT6118IMS8#PBF pin-compatible with other members of the LT6118 family?
Yes, the LT6118IMS8#PBF shares identical pinout and functionality with LT6118HMS8#PBF (–40°C to 125°C), LT6118IDCB#PBF (DFN-8), and LT6118HDCB#PBF. All variants use the same MSOP-8 or DFN-8 footprints and electrical interface - only temperature grade and package differ.
LT6118IMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT6118IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6118IMS8#PBF 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#PBF reliable?
The price and inventory of LT6118IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6118IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6118IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6118IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6118IMS8#PBF?
LT6118IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6118IMS8#PBF 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#PBF?
For technical support, including LT6118IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6118IMS8#PBF requirements.
6.How does Aetrix verify that LT6118IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6118IMS8#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LT6118IMS8#PBF?
All LT6118IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6118IMS8#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LT6118IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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