My Inquiry
My Account
Analog Devices Inc. LT6105CDCB#TRPBF
- Part No.:
- LT6105CDCB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT6105CDCB#TRPBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,747
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT6105CDCB#TRPBF from Analog Devices (acquired Linear Technology) is a micropower, precision unidirectional current sense amplifier with –0.3V to 44V input common mode range relative to V–, 1% max gain error, 300μV max input offset voltage, and 2V/μs slew rate. It operates from 2.85V to 36V supply and draws only 150μA, enabling high-side or low-side battery, fuse, and MOSFET current monitoring in automotive and industrial power systems.
For engineers reviewing the LT6105CDCB#TRPBF datasheet, LT6105CDCB#TRPBF pinout, LT6105CDCB#TRPBF application, or LT6105CDCB#TRPBF equivalent, key selection criteria include its Over-the-Top® input architecture, ±44V differential input tolerance, DFN-6 package thermal performance (θJA = 64°C/W), and guaranteed 0°C to 70°C operation for cost-sensitive industrial monitoring designs.
Technical Context
The LT6105CDCB#TRPBF uses dual-input, dual-amplifier topology with automatic range switching: when –IN > 1.6V, it routes sense current through RIN2 and Q1; when –IN < 1.6V, it routes through RIN1 and Q2/Q3 mirror. This enables seamless operation across its full –0.3V to 44V common mode range without external level-shifting circuitry.
Its output is a current-driven voltage developed across external ROUT, delivering ≥1mA full-scale output current with VO(MIN) ≤ 40mV (referred to V–) and VO(MAX) ≥ 1.27V (referred to V+). Input bias current remains below 30μA over temperature, and power-down mode reduces sense pin leakage to ≤1nA when V+ = 0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common Mode Range | –0.3V to 44V relative to V–: supports high-side sensing on 48V buses and negative-rail monitoring down to –0.3V. |
| Gain Accuracy | ±1% max: ensures current measurement error stays within ±1% across 25mV–75mV sense voltage range at 12V supply. |
| Input Offset Voltage | ≤300μV max (DCB package): enables accurate detection of sub-10mA currents with 5mΩ sense resistor. |
| Supply Current | 150μA typical: allows continuous battery current monitoring in always-on portable systems without significant drain. |
| Slew Rate | 2V/μs: provides fast response to transient overcurrent events (e.g., short-circuit detection in <5μs). |
| Operating Temperature | 0°C to 70°C: qualified for commercial-grade industrial control, test equipment, and non-automotive power management. |
| Differential Input Rating | ±44V: protects against fuse blowout transients and MOSFET switch arcing without external clamping. |
| Output Drive Capability | ≥1mA min: permits direct interface to ADC inputs or comparator thresholds with minimal signal degradation. |
Pinout & Package
LT6105CDCB#TRPBF is housed in a 6-lead 2mm × 3mm plastic DFN package (DCB) with exposed pad connected to V–. Thermal resistance θJA = 64°C/W enables reliable operation at full load without heatsink in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN (Pin 1) | Negative sense input | Accepts voltages from –0.3V to 44V vs V–; connects to RIN1 for low-voltage range operation (<1.6V). |
| V+ (Pin 2) | Power supply input | Independent 2.85V–36V supply; powers internal amplifiers but does not affect input common mode range. |
| V– (Pin 3) | Negative supply / ground reference | Reference node for all inputs and outputs; exposed pad must be connected to PCB V– plane for thermal and electrical integrity. |
| VOUT (Pin 4) | Amplified output voltage | Current-driven output: VOUT = AV × VSENSE; capable of sourcing ≥1mA into ROUT or downstream circuitry. |
| NC (Pin 5) | No connect | Internally unconnected; must remain floating or tied to V– per layout guidelines to avoid noise coupling. |
| +IN (Pin 6) | Positive sense input | Accepts voltages from –0.3V to 44V vs V–; connects to RIN2 for high-voltage range operation (>1.6V). |
Key Features
| Feature | Design Value |
|---|---|
| Over-the-Top® input architecture | Enables direct high-side sensing on 48V systems without level shifters or isolated supplies. |
| Power-down input isolation | V+ = 0V reduces sense pin leakage to ≤1nA, preventing loading of monitored circuit during standby. |
| Configurable gain (1–100V/V) | External RIN1/RIN2/ROUT allow precise scaling to match ADC input range and minimize quantization error. |
| High CMRR & PSRR (>100dB) | Maintains accuracy in noisy environments (e.g., motor drives, SMPS) where supply ripple or common-mode transients exceed 100mV. |
| Wide temperature stability | ΔVOS/ΔT ≤ 0.5μV/°C ensures <10μV offset drift over full 0°C–70°C operating range. |
| Robust fault tolerance | Withstands ±44V differential input and –9.5V reverse input (vs V–), eliminating need for external protection diodes. |
Applications
| Battery Fuel Gauging | Fuse/MOSFET Health Monitoring |
|---|---|
Use Scenario: Real-time discharge current tracking in 12V/24V lead-acid or Li-ion backup systems with cold-cranking capability. IC Role / Device Role / Timing Role: High-side current sense amplifier referenced to battery positive terminal, measuring bidirectional current flow via external shunt. Use Value: Enables accurate state-of-charge estimation using coulomb counting with ≤300μV offset error, supporting >1000-cycle battery life prediction. | Use Scenario: Continuous monitoring of series fuse voltage drop in industrial PLC power distribution modules. IC Role / Device Role / Timing Role: Low-latency current monitor detecting pre-failure resistive increase or open-circuit events before catastrophic failure. Use Value: 2V/μs slew rate and <5μs settling time enable detection of fuse degradation trends within 10ms, reducing unplanned downtime. |
| Automotive Body Control Module | Industrial Power Supply OCP |
Use Scenario: Load current supervision for headlight, HVAC blower, and seat heater circuits in 12V vehicle architectures. IC Role / Device Role / Timing Role: Unidirectional high-side current sensor interfaced to microcontroller ADC, providing real-time load diagnostics. Use Value: –0.3V to 44V input range accommodates load-dump transients up to +40V while maintaining accuracy, meeting ISO 7637-2 Pulse 5a requirements. | Use Scenario: Overcurrent protection feedback path in 24V/48V telecom rectifiers and server PSUs with fast shutdown response. IC Role / Device Role / Timing Role: Precision current sense front-end feeding comparator or digital controller for cycle-by-cycle current limiting. Use Value: 1% gain error and 300μV offset ensure trip threshold accuracy within ±2% across temperature, preventing nuisance shutdowns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Fixed gain (50V/V), wider –5V to 76V input range, higher 2.5mA quiescent current | Better suited for ultra-high-voltage industrial inverters; less flexible gain tuning than LT6105CDCB#TRPBF | Select MAX4080TASA+ when fixed-gain simplicity and extended voltage range outweigh micropower needs. |
| INA240A1DGNR | Bi-directional sensing, 80V supply rating, 120kHz bandwidth, 2.4mA IQ | Required for regenerative braking or H-bridge motor control; LT6105CDCB#TRPBF is unidirectional only | Choose INA240A1DGNR when bidirectional current measurement and higher bandwidth are mandatory. |
Compared with MAX4080TASA+ and INA240A1DGNR, the LT6105CDCB#TRPBF offers the lowest power consumption (150μA) and user-configurable gain for cost-optimized unidirectional monitoring, but lacks bidirectional capability and requires external resistors for gain setting-making it ideal for battery-powered or thermally constrained applications where flexibility and efficiency are prioritized.
Availability
LT6105CDCB#TRPBF is available at Aetrix Electronics and suitable for battery fuel gauging, fuse health monitoring, and automotive body control requiring stable component supply with commercial-temperature grade reliability.
Supply support for LT6105CDCB#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 precision analog portfolio, including high-performance current sense amplifiers engineered for accuracy, robustness, and low power.
The LT6105CDCB#TRPBF belongs to Linear's Over-the-Top® current sense amplifier family, designed specifically for high-side and low-side current monitoring in harsh industrial, automotive, and power management environments where wide input range and micropower operation are critical.
FAQ
What is the maximum input common mode voltage for LT6105CDCB#TRPBF?
The LT6105CDCB#TRPBF supports an input common mode voltage range of –0.3V to 44V relative to V–, independent of the V+ supply voltage. This allows direct high-side sensing on 48V systems and operation on negative rails, making LT6105CDCB#TRPBF suitable for battery monitoring from full charge to depletion without level-shifting circuitry.
Can LT6105CDCB#TRPBF be used for bidirectional current sensing?
No, LT6105CDCB#TRPBF is strictly a unidirectional current sense amplifier optimized for monitoring current flow in one direction only. Its internal architecture and output polarity are designed for single-quadrant operation. For bidirectional applications such as motor control or regenerative braking, alternatives like the INA240A1DGNR must be selected instead of LT6105CDCB#TRPBF.
What is the recommended gain-setting resistor configuration for LT6105CDCB#TRPBF?
For optimal accuracy across the full input range, LT6105CDCB#TRPBF requires RIN1 = RIN2. Gain is set as AV = ROUT / RIN1 (for –IN < 1.6V) or AV = ROUT / RIN2 (for –IN > 1.6V). Using 0.01% tolerance resistors minimizes total system error, and LT6105CDCB#TRPBF supports gains from 1V/V to 100V/V while maintaining ≤1mA output current limit.
How does LT6105CDCB#TRPBF behave when the V+ supply is disconnected?
When V+ is powered down, LT6105CDCB#TRPBF enters power-down mode: sense pin leakage drops to ≤1nA, effectively isolating the monitored circuit. This prevents loading of the sensed bus-even at 44V-and eliminates measurement errors during standby, making LT6105CDCB#TRPBF ideal for always-on battery monitoring applications.
Is LT6105CDCB#TRPBF pin-compatible with other packages in the LT6105 family?
No, LT6105CDCB#TRPBF uses the 6-lead DFN (DCB) package, while LT6105 variants in MSOP-8 (e.g., LT6105CMS8#TRPBF) have different pin count, layout, and thermal characteristics. The DCB package has exposed pad tied to V–, whereas MS8 has no exposed pad. Therefore, LT6105CDCB#TRPBF is not pin-compatible with MSOP versions, and PCB redesign is required for substitution.
LT6105CDCB#TRPBF 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#TRPBF FAQ
1.How can I place an order for LT6105CDCB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6105CDCB#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 LT6105CDCB#TRPBF reliable?
The price and inventory of LT6105CDCB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6105CDCB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6105CDCB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6105CDCB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6105CDCB#TRPBF?
LT6105CDCB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6105CDCB#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 LT6105CDCB#TRPBF?
For technical support, including LT6105CDCB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6105CDCB#TRPBF requirements.
6.How does Aetrix verify that LT6105CDCB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6105CDCB#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 LT6105CDCB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6105CDCB#TRPBF?
All LT6105CDCB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6105CDCB#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 LT6105CDCB#TRPBF part is unused and in its original packaging.
Return procedure for LT6105CDCB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT6105CDCB#TRPBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
