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Analog Devices Inc. LT6100IDD#TRPBF
- Part No.:
- LT6100IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6100IDD#TRPBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,466
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Product details
Overview
LT6100IDD#TRPBF from Analog Devices (formerly Linear Technology) is a precision, micropower, gain-selectable high-side current sense amplifier designed for unidirectional monitoring of load currents via an external sense resistor. It delivers 0.5% gain accuracy across six pin-selectable gains (10–50V/V), operates with sense inputs up to 48V, features 300µV max input offset, and draws only 60µA supply current - enabling accurate battery, fuse, and portable power rail monitoring in industrial and automotive systems.
For engineers reviewing the LT6100IDD#TRPBF datasheet, LT6100IDD#TRPBF pinout, LT6100IDD#TRPBF application, or LT6100IDD#TRPBF equivalent, key selection criteria include its –40°C to 85°C operating temperature range, DFN-8 package with exposed thermal pad, reverse-battery protection to –48V, buffered output with 12kHz filter capability, and compatibility with low-voltage VCC (2.7V) while sensing high common-mode voltages.
Technical Context
The LT6100IDD#TRPBF employs an Over-The-Top® input topology that enables operation with VS+ and VS– inputs extending from 4.1V to 48V - independent of VCC - and withstands differential sense voltages up to ±48V. Its two-stage architecture first level-shifts and amplifies VSENSE by 10V/V (A1 stage), then applies programmable gain (A2 stage) via pins A2 and A4 to achieve total gains of 10, 12.5, 20, 25, 40, or 50V/V.
It integrates a dedicated FIL pin connected to internal 60kΩ filtering resistance, allowing single-capacitor low-pass filtering (e.g., 220pF → 12kHz rolloff). With >105dB CMRR and PSRR, 15µs settling time, and <1nA sense input current when VCC = 0V, it maintains signal integrity in noisy, high-voltage, or power-gated environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.5% over full temperature range - ensures consistent current measurement without calibration across –40°C to 85°C. |
| Sense Input Range | 4.1V to 48V common-mode - supports direct monitoring of 12V/24V/48V battery rails, MOSFET switches, and fuses without level-shifting circuitry. |
| Input Offset Voltage | ±350µV max (DD package) - enables accurate detection of sub-10mA currents with typical 20mΩ sense resistors. |
| Supply Current | 60µA typical at VCC = 5V - suitable for always-on battery-powered systems with multi-year runtime requirements. |
| Reverse Battery Protection | Withstands –48V on VS+/VS– with VCC unpowered - prevents damage during jump-start or polarity reversal in automotive applications. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded control environments. |
| Bandwidth | 100kHz at AV = 10V/V - sufficient for DC and slow transient current monitoring (e.g., battery charge/discharge, thermal management). |
Pinout & Package
The LT6100IDD#TRPBF is housed in an 8-lead (3mm × 3mm) plastic DFN package with exposed thermal pad (Pin 9) soldered to PCB ground for enhanced thermal performance and EMI reduction. The package meets JEDEC MO-229 variation WEED-1 and supports reflow-compatible lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS– (Pin 1) | Negative sense input | Connects to low-side of sense resistor; internally tied to 5kΩ gain-setting resistor RG1; withstands up to 48V. |
| VCC (Pin 2) | Supply voltage input | Powers both sense amplifier and op amp; operates from 2.7V to 36V; powers down inputs to <1nA leakage when 0V. |
| FIL (Pin 3) | Noise filter input | Connects to external capacitor for single-pole low-pass filtering; RFIL = 60kΩ sets f–3dB = 1/(2π·60k·C). |
| VEE (Pin 4) | Negative supply / ground reference | Reference node for output and internal circuitry; exposed pad must be soldered to PCB ground plane. |
| VOUT (Pin 5) | Buffered output | Provides gain-scaled, level-shifted replica of VSENSE; drives capacitive loads ≤1000pF; min swing = 15mV above VEE. |
| A2 (Pin 6) | Gain select input | Strapping to VEE or floating selects A2 stage gain (1×–5×); combined with A4 determines total gain (10–50V/V). |
| A4 (Pin 7) | Gain select input | Strapping to VEE or floating configures A2 stage gain per Table 1; dual-pin logic defines six discrete gain options. |
| VS+ (Pin 8) | Positive sense input | Connects to high-side of sense resistor; internally tied to 5kΩ RG2; functional up to 48V; reverse-battery tolerant. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable gain | Six precise gains (10/12.5/20/25/40/50V/V) set by strapping A2/A4 to VEE or leaving open - eliminates external gain resistors and layout variability. |
| Over-The-Top® input architecture | Enables sense inputs to operate up to 48V while VCC is as low as 2.7V - decouples sensing voltage domain from supply domain for flexible system partitioning. |
| Power-down input isolation | Sense input current drops to <1nA when VCC = 0V - allows permanent connection to battery rails without loading or risk of damage during sleep modes. |
| Integrated noise filtering | FIL pin with internal 60kΩ resistance enables simple RC filtering (e.g., 220pF → 12kHz cutoff) - suppresses switching noise from DC/DC converters or motor drivers. |
| High CMRR & PSRR | >105dB common-mode and supply rejection - preserves accuracy in electrically noisy environments with varying ground potentials or supply ripple. |
| Reverse-battery hardened inputs | Withstands –48V on VS+/VS– with VCC unpowered - meets automotive ISO 16750-2 requirements for load-dump and reverse-polarity survivability. |
Applications
| Battery Monitoring | Fuse Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of Li-ion or lead-acid battery discharge/charge current in portable medical devices or UPS systems. IC Role / Device Role / Timing Role: High-side current sense amplifier converting mV-level RSENSE voltage into buffered, gain-scaled analog output for ADC sampling. Use Value: Enables accurate state-of-charge estimation and overcurrent shutdown with ±0.5% gain error and <350µV offset - critical for battery longevity and safety compliance. |
Use Scenario: Detecting open-circuit conditions in automotive or industrial power distribution fuses under 48V bus operation. IC Role / Device Role / Timing Role: High-voltage sense front-end that remains functional even when fuse blows and VS– collapses to 0V. Use Value: Provides fail-safe output saturation (VOH) without phase inversion when VS– = 0V - eliminates false fault signals during actual overcurrent events. |
| Portable Test Equipment | Industrial Power Supply Monitoring |
|
Use Scenario: Precision current measurement in handheld multimeters or battery analyzers requiring µA-level standby current and wide dynamic range. IC Role / Device Role / Timing Role: Micropower current sensor interfacing directly to low-power microcontrollers with 12-bit ADCs. Use Value: 60µA supply current and 15µs settling time enable fast, low-power measurements - extending battery life while maintaining responsiveness. |
Use Scenario: Monitoring output current of 24V/48V industrial DC power supplies feeding PLC I/O modules or sensors. IC Role / Device Role / Timing Role: Isolated high-side monitor replacing optocoupler-based solutions, referenced to system ground. Use Value: 48V common-mode tolerance and >105dB PSRR reject supply ripple and ground noise - improving measurement fidelity in electrically harsh factory environments. |
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 |
|---|---|---|---|
| INA240A1IDR | Fixed gain (20V/V), higher bandwidth (400kHz), lower offset (±5µV typ), but requires ≥2.7V VCC and lacks reverse-battery rating. | Better for high-speed motor current loop feedback; unsuitable for –48V reverse-battery scenarios. | Select INA240A1IDR when speed and ultra-low offset outweigh reverse-protection needs and fixed gain is acceptable. |
| MAX40056ATA+ | Pin-selectable gain (50/100/200V/V), wider VCC range (2.7V–60V), but higher quiescent current (120µA) and no FIL pin for integrated filtering. | Preferred for high-gain, low-current sensing (e.g., <100mA) where bandwidth >200kHz is required. | Choose MAX40056ATA+ when sensing very small currents with minimal VSENSE and higher supply voltage headroom is available. |
Compared with INA240A1IDR and MAX40056ATA+, the LT6100IDD#TRPBF uniquely balances micropower operation (60µA), robust reverse-battery tolerance (–48V), integrated noise filtering (FIL pin), and flexible gain selection - making it optimal for cost-sensitive, safety-critical, and battery-backed industrial monitoring where reliability trumps raw speed.
Availability
LT6100IDD#TRPBF is available at Aetrix Electronics and suitable for battery management systems, industrial power distribution monitoring, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6100IDD#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT6100IDD#TRPBF belongs to ADI's precision current sense amplifier product line, engineered for high-voltage, low-power, and fault-tolerant current monitoring in automotive, industrial, and energy systems where accuracy, reliability, and design simplicity are critical.
FAQ
What is the maximum sense voltage range supported by the LT6100IDD#TRPBF?
The LT6100IDD#TRPBF supports a differential sense voltage (VSENSE = VS+ – VS–) up to ±300mV for full-scale operation, with guaranteed performance across its specified input common-mode range of 4.1V to 48V. This allows accurate current measurement using low-value sense resistors (e.g., 20mΩ for 10A full-scale) while maintaining high dynamic range and minimizing power loss in the sense element. The device remains functional even if VSENSE exceeds this range, though accuracy degrades beyond specifications.
How does the LT6100IDD#TRPBF handle reverse battery conditions?
The LT6100IDD#TRPBF withstands reverse battery conditions down to –48V on both VS+ and VS– terminals, even when VCC is unpowered. This is achieved through its Over-The-Top® input architecture and internal protection circuitry. During reverse polarity, input leakage remains below 1µA, and no damage occurs - making the LT6100IDD#TRPBF suitable for automotive applications where jump-starting or incorrect battery connection may occur.
Can the LT6100IDD#TRPBF be used with a 3.3V supply voltage?
Yes, the LT6100IDD#TRPBF operates with VCC from 2.7V to 36V, so a 3.3V supply is fully supported. At VCC = 3.3V, it maintains all key specifications including 0.5% gain accuracy, 300µV max input offset, and 60µA supply current. The output swing remains functional - minimum VOUT = 15mV above VEE, and maximum VOUT reaches within 75mV of VCC - ensuring compatibility with 3.3V ADC references and logic interfaces.
What is the purpose of the FIL pin on the LT6100IDD#TRPBF?
The FIL pin on the LT6100IDD#TRPBF connects internally to a 60kΩ resistor and provides a dedicated node for adding an external capacitor to implement a single-pole low-pass filter. This filters high-frequency noise (e.g., from DC/DC converters or motor commutation) before it reaches the internal amplifier. For example, a 220pF capacitor yields a 12kHz –3dB corner frequency - a common choice for suppressing switching ripple while preserving current step response integrity.
Does the LT6100IDD#TRPBF require external components for basic operation?
No, the LT6100IDD#TRPBF requires no external resistors for gain setting - its six gain options (10–50V/V) are selected solely by strapping or floating pins A2 and A4. Only three external components are typically needed: the sense resistor (RSENSE), a bypass capacitor on VCC, and optionally a capacitor on FIL for noise filtering. This minimizes BOM count, PCB area, and calibration complexity compared to op-amp-based current sense solutions.
LT6100IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 150 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 60µA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT6100IDD#TRPBF FAQ
1.How can I place an order for LT6100IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6100IDD#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 LT6100IDD#TRPBF reliable?
The price and inventory of LT6100IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6100IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6100IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6100IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6100IDD#TRPBF?
LT6100IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6100IDD#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 LT6100IDD#TRPBF?
For technical support, including LT6100IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6100IDD#TRPBF requirements.
6.How does Aetrix verify that LT6100IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6100IDD#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 LT6100IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6100IDD#TRPBF?
All LT6100IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6100IDD#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 LT6100IDD#TRPBF part is unused and in its original packaging.
Return procedure for LT6100IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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