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Analog Devices Inc. LT6105CDCB#TRMPBF
- Part No.:
- LT6105CDCB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT6105CDCB#TRMPBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,177
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Product details
Overview
LT6105CDCB#TRMPBF from Analog Devices (acquired Linear Technology) is a micropower, precision unidirectional current sense amplifier with –0.3V to 44V input common mode range referenced to V–, 1% max gain error, <300μV input offset voltage, and 2V/μs slew rate. It operates from 2.85V to 36V supply, draws only 150μA, and supports high-side or low-side sensing in battery monitoring and fuse/MOSFET protection circuits.
For engineers reviewing the LT6105CDCB#TRMPBF datasheet, LT6105CDCB#TRMPBF pinout, LT6105CDCB#TRMPBF application, or LT6105CDCB#TRMPBF equivalent, this page delivers verified specifications, DFN-6 pin mapping, temperature-grade-specific performance (0°C to 70°C), real-world use cases in automotive power management and portable instrumentation, and two validated alternative parts with documented functional trade-offs.
Technical Context
The LT6105CDCB#TRMPBF uses dual-path architecture: for V–IN > 1.6V, it routes sense current through RIN2 and Q1; for V–IN < 1.6V, it switches to RIN1 and Q2/Q3 mirroring-enabling seamless operation across its full –0.3V to 44V common mode range. Its input stage withstands ±44V differential voltage, making it suitable for direct fuse or MOSFET drain-source monitoring.
It features 100dB+ CMRR and PSRR over 2.8V–44V input range, 0.5μV/°C VOS drift, and output capable of sourcing ≥1mA into loads. The device enters ultra-low-power state (<1nA sense-pin bias) when V+ is powered down, preventing circuit loading during standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common Mode Range | –0.3V to 44V relative to V–: enables high-side sensing on 40V rails and negative-supply current monitoring |
| Gain Accuracy | ±1% max: ensures ≤10mV error at 1A through 10mΩ shunt with 100V/V gain |
| Input Offset Voltage | ≤300μV (DCB package): supports accurate 30mA resolution with 10mΩ shunt |
| Supply Current | 150μA typical: allows always-on battery current logging in energy-constrained systems |
| Slew Rate | 2V/μs: responds to 100mV step in ≤50ns, critical for overcurrent fault detection |
| Operating Temperature | 0°C to 70°C (C-grade): qualified for commercial industrial control and test equipment |
| Package | 6-lead 2mm × 3mm DFN with exposed pad tied to V–: provides low thermal resistance (θJA = 64°C/W) |
Pinout & Package
LT6105CDCB#TRMPBF is housed in a 6-lead plastic DFN (2mm × 3mm) with exposed pad connected to V–. Pin 7 (exposed pad) must be soldered to V– PCB trace for thermal and electrical integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN | Negative sense input; functional up to 44V above V–; connects to RIN1 for low-voltage gain path |
| 2 | V+ | Main supply (2.85V–36V); powers internal circuitry independently of sense voltage |
| 3 | V– | Negative supply/ground reference; exposed pad internally connected to this pin |
| 4 | VOUT | Amplified output: VOUT = AV × VSENSE; drives ≥1mA load with rail-to-rail swing capability |
| 5 | NC | No internal connection; must be left floating or grounded per layout best practice |
| 6 | +IN | Positive sense input; functional up to 44V above V–; connects to RIN2 for high-voltage gain path |
Key Features
| Feature | Design Value |
|---|---|
| Over-the-Top® Input Range | Operates with inputs up to 44V above V– regardless of V+ level-eliminates need for level-shifting circuitry in high-side sensing |
| Power-Down Sense Isolation | V+ = 0V reduces sense pin bias current to ≤1nA-prevents loading of monitored circuit during sleep modes |
| Configurable Gain (1–100V/V) | Set via external RIN1, RIN2, ROUT; RIN1 = RIN2 ensures optimal accuracy across full input range |
| High CMRR & PSRR | ≥100dB rejection of common-mode noise and supply ripple-critical for noisy automotive or industrial environments |
| Wide Supply Range | 2.85V–36V operation supports single-cell Li-ion up to 36V industrial bus rails without auxiliary supplies |
Applications
| Battery Fuel Gauging | Fuse/MOSFET Health Monitoring |
|---|---|
Use Scenario: Continuous current tracking from full charge to depletion in 12V lead-acid or 4S Li-ion packs. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring bidirectional discharge/charge paths with sub-300μV offset. Use Value: Enables <1% SOC error over lifetime by rejecting battery voltage drift and maintaining accuracy at low currents (e.g., 10mA). |
Use Scenario: Real-time monitoring of fuse voltage drop or MOSFET RDS(on) during surge events in power distribution units. IC Role / Device Role / Timing Role: Precision differential amplifier with ±44V differential tolerance, directly connected across fuse terminals. Use Value: Detects <50mΩ resistance increase in 100A fuses before catastrophic failure, with no additional isolation components. |
| Automotive Body Control Module | Portable Test Equipment |
Use Scenario: Load current supervision for headlight, HVAC, and seat motor drivers in 12V/24V vehicle architectures. IC Role / Device Role / Timing Role: Low-quiescent-current current sensor interfacing to microcontroller ADC with 12-bit resolution. Use Value: Delivers 150μA supply current and 2V/μs response-meets OEM requirements for always-on diagnostics without draining battery. |
Use Scenario: Current measurement front-end in handheld multimeters and battery analyzers requiring µA-level resolution. IC Role / Device Role / Timing Role: Precision gain-stage amplifier with Kelvin-sense support for 4-wire shunt connections. Use Value: Achieves 80dB dynamic range using 100μV offset and 1V full-scale output-enables 0.1% accuracy from 100µA to 10A ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40056ATA+T | Wider supply range (2.7V–60V), lower offset (120μV), but fixed 50V/V gain and no power-down mode | Best for high-voltage industrial DC-DC monitoring where gain flexibility is unnecessary | Select when absolute offset minimization outweighs programmable gain and ultra-low standby current needs |
| INA240A1QDRQ1 | Automotive AEC-Q100 qualified, higher bandwidth (1.1MHz), but higher quiescent current (2.4mA) and narrower common mode (–4V to 80V) | Required for ASIL-B automotive subsystems needing qualification and faster transient response | Choose for safety-critical vehicle applications where qualification and speed supersede micropower operation |
Compared with MAX40056ATA+T and INA240A1QDRQ1, the LT6105CDCB#TRMPBF uniquely balances micropower consumption (150μA), wide common mode (–0.3V to 44V), and externally configurable gain-making it optimal for cost-sensitive, battery-powered industrial monitors where design flexibility and standby efficiency are prioritized.
Availability
LT6105CDCB#TRMPBF is available at Aetrix Electronics and suitable for battery fuel gauging, automotive body control modules, and portable test equipment requiring stable component supply across commercial temperature grades.
Supply support for LT6105CDCB#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, 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 LT6105CDCB#TRMPBF belongs to ADI's precision current sense amplifier product line, engineered for high-accuracy, low-power current monitoring in space-constrained and energy-sensitive applications such as portable instrumentation and automotive subsystems.
FAQ
What is the operating temperature range of the LT6105CDCB#TRMPBF?
The LT6105CDCB#TRMPBF is specified for 0°C to 70°C ambient operation (C-grade). While characterized from –40°C to 85°C, only the 0°C to 70°C range is production-tested and guaranteed per datasheet Note 5. For extended temperature applications, consider LT6105IDCB#TRMPBF (–40°C to 85°C) or LT6105HDCB#TRMPBF (–40°C to 125°C).
Can the LT6105CDCB#TRMPBF be used for high-side current sensing on a 40V rail?
Yes-the LT6105CDCB#TRMPBF supports input common mode voltages up to 44V above V–, enabling direct high-side sensing on 40V systems when V– is grounded. Its ±44V differential input rating also allows safe connection across fuses or MOSFETs without external protection diodes.
How does the LT6105CDCB#TRMPBF handle power-down conditions?
When V+ is powered down, the LT6105CDCB#TRMPBF reduces sense pin bias current to ≤1nA (typical), effectively isolating the monitored circuit. This prevents loading of sensitive high-impedance nodes during system sleep-critical for battery-powered applications where standby leakage must be minimized.
What external resistors are required to configure gain on the LT6105CDCB#TRMPBF?
The LT6105CDCB#TRMPBF requires three external resistors: RIN1 and RIN2 (typically matched) connected to –IN and +IN respectively, and ROUT from VOUT to V–. Gain equals ROUT/RIN (where RIN = RIN1 = RIN2). For example, RIN = 100Ω and ROUT = 5kΩ yields 50V/V gain.
Is the LT6105CDCB#TRMPBF pin-compatible with other members of the LT6105 family?
Yes-LT6105CDCB#TRMPBF shares identical pinout and footprint with all LT6105 variants in the 6-lead DFN package (e.g., LT6105IDCB#TRMPBF, LT6105HDCB#TRMPBF), enabling drop-in replacement across temperature grades without PCB revision.
LT6105CDCB#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 240µA
- Current - Output / Channel:
- 1 mA
- Voltage - Supply Span (Min):
- 2.85 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x3)
LT6105CDCB#TRMPBF FAQ
1.How can I place an order for LT6105CDCB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6105CDCB#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 LT6105CDCB#TRMPBF reliable?
The price and inventory of LT6105CDCB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6105CDCB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT6105CDCB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6105CDCB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6105CDCB#TRMPBF?
LT6105CDCB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6105CDCB#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 LT6105CDCB#TRMPBF?
For technical support, including LT6105CDCB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6105CDCB#TRMPBF requirements.
6.How does Aetrix verify that LT6105CDCB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT6105CDCB#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 LT6105CDCB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT6105CDCB#TRMPBF?
All LT6105CDCB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6105CDCB#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 LT6105CDCB#TRMPBF part is unused and in its original packaging.
Return procedure for LT6105CDCB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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