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Analog Devices Inc. LT6118IDCB#TRMPBF
- Part No.:
- LT6118IDCB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6118IDCB#TRMPBF.pdf
- Description:
- IC CURRENT SENSE 0.2% 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,308
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Product details
Overview
LT6118IDCB#TRMPBF 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 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 reliable fault response in motor control and battery monitoring.
For engineers reviewing the LT6118IDCB#TRMPBF datasheet, LT6118IDCB#TRMPBF pinout, LT6118IDCB#TRMPBF application, or LT6118IDCB#TRMPBF equivalent, key selection criteria include its 2.7V–60V supply range, –40°C to 85°C operating temperature, 8-lead DFN (2mm × 3mm) package, and independent comparator input/output architecture supporting external threshold configuration via resistors.
Technical Context
The LT6118IDCB#TRMPBF integrates a precision current-sense amplifier with rail-to-rail output current sourcing (OUTA), a dedicated 400mV ±1.25% internal reference, and a comparator with programmable latch enable (LE pin) and power-on reset functionality. Its SENSEHI/SENSELO inputs operate with up to 33V common-mode voltage relative to V+, and the comparator's open-drain OUTC output supports pull-up voltages up to 60V above V–.
Amplifier gain is set externally via RIN (e.g., 100Ω for G = 100), while comparator trip point is configured using ROUT; both functions remain electrically isolated. The device achieves 500ns step response and maintains 110dB CMRR at 60V common-mode, ensuring accuracy in noisy high-voltage environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 60V - supports direct connection to high-side bus rails without level-shifting circuitry. |
| Input Offset Voltage | ±200µV max - enables accurate low-current sensing down to ~20mA with 10mΩ shunt. |
| Gain Error | ±0.2% max - ensures stable current-to-voltage conversion across temperature and supply variations. |
| Bandwidth | 1MHz - sufficient for real-time error detection in motor control loops and switching power supplies. |
| Propagation Delay | 1.4µs typical - allows rapid fault flag assertion before destructive overcurrent events escalate. |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient and under-hood automotive use cases. |
| Package | 8-lead DFN (2mm × 3mm) with exposed V– pad - provides low thermal resistance (θJA = 64°C/W) for high-power density designs. |
Pinout & Package
LT6118IDCB#TRMPBF uses an 8-lead plastic DFN package (2mm × 3mm) with exposed pad (Pin 9) connected internally to V–. The package supports reflow soldering and offers improved thermal performance over MSOP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSELO (Pin 1) | Sense amplifier non-inverting input | Connected to load side of shunt resistor; defines reference potential for differential sense voltage. |
| LE (Pin 2) | Latch enable control | High = comparator output latches low on trip; low = transparent comparator operation with POR capability. |
| OUTC (Pin 3) | Open-drain comparator output | Drives external logic or microcontroller interrupt; supports pull-up to any voltage ≤60V above V–. |
| V– (Pin 4) | Negative supply / ground reference | Primary return path for supply current and amplifier output; exposed pad connects to same node. |
| INC (Pin 5) | Comparator inverting input | Internally referenced to 400mV; external resistor divider sets actual trip threshold relative to V–. |
| OUTA (Pin 6) | Current-output amplifier | Sources IOUTA = VSENSE/RIN; requires external ROUT to convert to voltage for downstream circuits. |
| 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 by internal amplifier; Kelvin connection minimizes trace-resistance errors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 400mV precision reference | ±1.25% total threshold error enables accurate, resistor-free comparator setup with minimal BOM count. |
| Latching comparator with LE control | Enables persistent fault flagging until system-level reset - critical for safety-critical overcurrent protection. |
| Power-on reset (POR) capability | Ensures known comparator state at startup, eliminating spurious trips during power ramp-up. |
| 1.4µs total propagation delay | Supports sub-microsecond fault response in high-speed motor drives and DC-DC converters. |
| 85°C extended temperature grade | Validated performance up to +85°C ambient - suitable for enclosed industrial controllers and automotive ECUs. |
Applications
| Motor Control Overcurrent Protection | Battery Pack Monitoring |
|---|---|
Use Scenario: Real-time phase current monitoring in BLDC motor inverters to trigger shutdown before MOSFET failure. IC Role / Device Role / Timing Role: High-side current sense amplifier with latched comparator generates immediate hardware fault signal upon exceeding trip threshold. Use Value: 1.4µs propagation delay and 500ns step response allow detection of <1µs current spikes, preventing IGBT short-circuit damage. | Use Scenario: Cell-level current monitoring in 48V EV auxiliary battery packs to detect internal shorts or charge imbalance. IC Role / Device Role / Timing Role: Precision current-to-voltage conversion with 200µV offset enables accurate 10mA–200A measurement range using single shunt. Use Value: 0.2% gain error and 110dB CMRR at 60V ensure stable readings despite pack voltage transients and EMI noise. |
| Industrial Power Supply OCP | Automotive Body Control Module |
Use Scenario: Secondary-side overcurrent protection in isolated 24V/48V telecom and factory automation PSUs. IC Role / Device Role / Timing Role: High-side sensing isolates fault detection from primary-side control loop; comparator output drives optocoupler or MCU GPIO. Use Value: 2.7V–60V supply range accommodates wide input variation; 8-lead DFN simplifies layout in space-constrained PSU PCBs. | Use Scenario: Load current supervision for smart fuses driving HVAC actuators, lighting, or window lift motors. IC Role / Device Role / Timing Role: Current sense amplifier feeds ADC for diagnostics; latched comparator asserts hardware interrupt on sustained overload. Use Value: –40°C to +85°C rating matches AEC-Q200 ambient requirements; 400mV reference eliminates need for external precision voltage source. |
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 |
|---|---|---|---|
| MAX40056ATA+T | Higher 3.5µs propagation delay; no integrated reference; requires external 400mV source for comparator. | Lacks built-in POR and latch enable; comparator behavior less deterministic at startup. | Choose when external reference already exists and lower cost outweighs missing latch/POR features. |
| INA286AIDR | Fixed 50V/V gain; no comparator; 600µV offset; 2.7V–18V supply only. | Requires external comparator and reference; unsuitable for >18V bus or latch-based protection schemes. | Select only for low-voltage (<18V), non-latching applications where fixed-gain simplifies design. |
Compared with MAX40056ATA+T and INA286AIDR, LT6118IDCB#TRMPBF uniquely combines integrated reference, latch control, POR, and 60V operation - reducing component count and improving fault-response determinism in industrial and automotive overcurrent protection.
Availability
LT6118IDCB#TRMPBF is available at Aetrix Electronics and suitable for motor control overcurrent protection, battery pack monitoring, and industrial power supply OCP requiring stable component supply across extended temperature ranges.
Supply support for LT6118IDCB#TRMPBF 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, manufacturing, and documentation for the LT® family of precision analog ICs.
The LT6118 product line was designed specifically for high-reliability high-side current sensing in harsh environments - emphasizing speed, accuracy, and integration of reference/comparator functions to simplify fault-detection subsystems.
FAQ
What is the maximum common-mode voltage the LT6118IDCB#TRMPBF can handle?
The LT6118IDCB#TRMPBF supports a maximum V+ to V– supply voltage of 60V and a maximum V+ – (SENSELO or SENSEHI) differential of 33V. This allows it to monitor currents on high-side rails up to 60V while maintaining accurate amplification of small sense voltages across the shunt resistor. The 33V limit ensures safe operation even when SENSEHI floats near V+.
Does the LT6118IDCB#TRMPBF require external resistors to set gain and threshold?
Yes, the LT6118IDCB#TRMPBF requires external resistors: RIN between SENSEHI and V+ sets amplifier gain (G = ROUT/RIN), and ROUT between OUTA and V– converts output current to voltage. The comparator threshold is set by a resistor divider from OUTA to V–, referenced to the internal 400mV reference. No external reference is needed.
Can the LT6118IDCB#TRMPBF be used in automotive applications?
Yes - the LT6118IDCB#TRMPBF is specified for –40°C to +85°C operation and features robust ESD protection, 60V absolute maximum ratings, and latch-enabled fault detection ideal for automotive body control modules, battery disconnect units, and motor drivers. It meets AEC-Q200 stress test requirements when used within its rated conditions.
What is the purpose of the LE pin on the LT6118IDCB#TRMPBF?
The LE (Latch Enable) pin on the LT6118IDCB#TRMPBF controls whether the comparator output latches low after tripping. When LE is high, OUTC remains low until manually reset; when LE is low, OUTC returns high immediately when the input falls below the hysteresis threshold. This enables flexible fault-handling strategies - from one-shot shutdown to continuous monitoring.
How does the LT6118IDCB#TRMPBF achieve fast step response despite high common-mode voltage?
The LT6118IDCB#TRMPBF achieves 500ns step response through a proprietary high-speed amplifier topology that decouples input stage biasing from common-mode voltage swings. Its matched internal transistor pairs and optimized compensation maintain stability and bandwidth across the full 2.7V–60V supply range, enabling rapid settling even with large dV/dt on the SENSEHI/SENSELO nodes.
LT6118IDCB#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-DFN (2x3)
LT6118IDCB#TRMPBF FAQ
1.How can I place an order for LT6118IDCB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6118IDCB#TRMPBF 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 LT6118IDCB#TRMPBF reliable?
The price and inventory of LT6118IDCB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6118IDCB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT6118IDCB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6118IDCB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6118IDCB#TRMPBF?
LT6118IDCB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6118IDCB#TRMPBF 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 LT6118IDCB#TRMPBF?
For technical support, including LT6118IDCB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6118IDCB#TRMPBF requirements.
6.How does Aetrix verify that LT6118IDCB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT6118IDCB#TRMPBF 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 LT6118IDCB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT6118IDCB#TRMPBF?
All LT6118IDCB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6118IDCB#TRMPBF, 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 LT6118IDCB#TRMPBF part is unused and in its original packaging.
Return procedure for LT6118IDCB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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