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Analog Devices Inc. LTC6103CMS8#PBF
- Part No.:
- LTC6103CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6103CMS8#PBF.pdf
- Description:
- IC CURRENT SENSE 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,040
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Product details
Overview
LTC6103CMS8#PBF from Analog Devices (formerly Linear Technology) is a dual high-side current sense amplifier designed for precise, high-voltage shunt-based current monitoring in industrial and automotive power systems. It features two independent amplifiers sharing only the V– terminal, 450 µV max input offset, 1 µs response time, and operates from 4 V to 60 V supply - enabling accurate sensing of load currents up to ±10 A with minimal shunt loss in battery management and motor control circuits.
For engineers reviewing the LTC6103CMS8#PBF datasheet, LTC6103CMS8#PBF pinout, LTC6103CMS8#PBF application, or LTC6103CMS8#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in high-common-mode-voltage environments, and confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LTC6103CMS8#PBF implements a transconductance architecture: each internal amplifier forces its –IN pin to match its +IN voltage, converting the differential sense voltage (VSENSE) across an external shunt into a proportional output current (IOUT = VSENSE/RIN). This current-source output enables flexible level-shifting and ground-referenced signal translation without isolation components.
Both amplifiers operate independently except for shared V–, allowing separate gain setting (via RIN), independent supply ranges (up to 60 V on +INA/+INB), and distinct output loading (via ROUT). PSRR exceeds 110 dB from 6 V to 60 V, and input bias current remains ≤170 nA - critical for low-error measurements with high-value RIN resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4 V to 60 V - supports direct connection to 12 V, 24 V, and 48 V industrial buses without regulators. |
| Input Offset Voltage | ±450 µV max - enables use of sub-10 mΩ shunts while maintaining ≥60 dB dynamic range at 100 mV full-scale. |
| Response Time | 1 µs to 50% - suitable for overcurrent warning and fast shutdown in motor drives and DC-DC converters. |
| Supply Current | 275 µA per amplifier at 12 V - allows continuous monitoring in power-constrained battery systems. |
| PSRR | ≥110 dB (6 V–60 V) - rejects supply ripple-induced errors in noisy high-power environments. |
| Operating Temp | –40°C to 85°C - qualified for under-hood automotive and industrial ambient conditions. |
| Output Current | 1 mA max - sets practical upper limit for ROUT selection to avoid saturation or excessive self-heating. |
Pinout & Package
The LTC6103CMS8#PBF is housed in an 8-lead MSOP package (3 mm × 3 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin 3 is NC; all other pins are electrically active and validated per Linear Technology's official datasheet (6103f).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (OUTA) | Current output of Amplifier A | Sources IOUTA = VSENSE,A/RIN,A; requires external ROUT,A to ground to generate VOUT,A. |
| Pin 2 (OUTB) | Current output of Amplifier B | Sources IOUTB = VSENSE,B/RIN,B; independent of OUTA, enabling dual-channel monitoring. |
| Pin 3 (NC) | No connect | Unbonded; must remain floating - no PCB trace or copper pour. |
| Pin 4 (V–) | Common negative supply/ground reference | Shared return path for both amplifiers; connects to system ground or negative rail. |
| Pin 5 (+INB/VSB) | +IN of Amp B & supply pin for Amp B | Tied to high-side shunt terminal; supplies Amp B current - trace resistance here causes offset error. |
| Pin 6 (–INB) | –IN of Amp B | Kelvin-connected to low-side shunt terminal; RIN,B from VSB to –INB sets transconductance. |
| Pin 7 (–INA) | –IN of Amp A | Kelvin-connected to second shunt; RIN,A from VSA to –INA sets independent gain for channel A. |
| Pin 8 (+INA/VSA) | +IN of Amp A & supply pin for Amp A | Tied to high-side of second shunt; supplies Amp A current - layout symmetry critical for matching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent amplifiers | Enables simultaneous monitoring of two loads (e.g., H-bridge legs or redundant power rails) with separate gain and filtering. |
| High-side sensing only | Eliminates ground-path disturbance; avoids shunt placement in low-side return paths that compromise system grounding. |
| Transconductance output | Current-source outputs simplify level shifting - no op-amp buffers needed to translate high-common-mode signals to ground-referenced ADC inputs. |
| Low quiescent current | 275 µA per amplifier at 12 V enables always-on battery current logging in portable equipment without significant drain. |
| Wide temperature range | Specified from –40°C to 85°C ensures stable offset and gain in automotive engine compartments and industrial enclosures. |
Applications
| Battery Management System | Industrial Motor Drive |
|---|---|
|
Use Scenario: Monitoring charge/discharge current in 48 V Li-ion battery packs with ±5 A range and <1% accuracy requirement. IC Role / Device Role / Timing Role: High-side current sense amplifier translating shunt voltage (across 2 mΩ resistor) into ground-referenced 0–3 V signal for MCU ADC. Use Value: 450 µV max offset enables <10 mA resolution at full scale; 1 µs response supports cell-balancing fault detection within 2 µs. |
Use Scenario: Real-time phase current sensing in 3-phase BLDC motor drives operating from 24 V–60 V bus. IC Role / Device Role / Timing Role: Dual-channel high-side monitor measuring upper-leg FET currents; outputs fed to isolated sigma-delta ADCs. Use Value: Independent gain per channel accommodates asymmetric phase currents; PSRR >110 dB suppresses PWM switching noise coupling. |
| Automotive Load Dump Protection | Telecom Power Shelf Monitoring |
|
Use Scenario: Detecting overcurrent events during 12 V vehicle load dump transients (up to 60 V surge) to trigger MOSFET gate shutdown. IC Role / Device Role / Timing Role: Fast-response current limiter interfaced with comparator and latch circuit; monitors main fuse branch. Use Value: 1 µs step response ensures detection before 10 ms ISO 7637-2 pulse peak; 70 V absolute max rating withstands transient overshoot. |
Use Scenario: Supervising individual 48 V DC-DC converter outputs in carrier-grade telecom power shelves with hot-swap capability. IC Role / Device Role / Timing Role: Dual-channel monitor providing redundant current readback to shelf controller via analog voltage outputs. Use Value: Two independent channels eliminate single-point failure; 275 µA supply current minimizes standby power overhead per monitored rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40056ATA+T | Single-channel, 2.7 V–60 V supply, 120 µV max offset, 1.5 µs response; no shared V– architecture. | Requires two devices for dual monitoring; lower offset improves resolution but lacks integrated dual-channel correlation. | Select when highest DC accuracy is required and board space permits duplication; not drop-in for LTC6103CMS8#PBF layout. |
| INA240A1QDGSRQ1 | Single-channel, AEC-Q100 qualified, 100 µV max offset, 1.5 µs response, integrated 20× fixed gain; no RIN-based transconductance. | Fixed-gain architecture simplifies design but eliminates programmable sensitivity; automotive grade adds qualification overhead. | Choose for automotive production where AEC-Q100 compliance is mandatory and gain flexibility is secondary to qualification. |
Compared with MAX40056ATA+T and INA240A1QDGSRQ1, the LTC6103CMS8#PBF uniquely provides true dual-channel independence with shared V–, enabling compact dual-monitoring without inter-channel crosstalk or duplicated supply routing - critical for space-constrained H-bridge and redundant power designs.
Availability
LTC6103CMS8#PBF is available at Aetrix Electronics and suitable for battery management, industrial motor control, automotive load protection, and telecom power shelf monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC6103CMS8#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 technical support, manufacturing, and documentation for the LTC product line.
The LTC6103 belongs to Linear's precision current sense amplifier family, engineered for high-voltage, high-accuracy shunt-based monitoring in harsh environments where ground-referenced sensing is impractical or unsafe.
FAQ
What is the maximum common-mode voltage the LTC6103CMS8#PBF can handle?
The LTC6103CMS8#PBF supports a total supply voltage of up to 70 V (absolute maximum) between +INA/+INB and V–, enabling operation with common-mode voltages up to 60 V. Its specified operating range is 4 V to 60 V, making it suitable for 48 V industrial buses and 12 V/24 V automotive systems with transient margin.
Can the LTC6103CMS8#PBF measure bidirectional current?
No - the LTC6103CMS8#PBF is a unidirectional high-side current sense amplifier. It measures current flowing from +IN toward V– (i.e., conventional current out of the load). For bidirectional sensing, external circuitry such as an op-amp summing stage or a dedicated bidirectional IC like the LTC6104 is required.
How does the LTC6103CMS8#PBF achieve level translation without isolation?
The LTC6103CMS8#PBF uses a transconductance architecture: its internal amplifier forces –IN to track +IN, causing current IOUT = VSENSE/RIN to flow from OUT to V–. Since V– is ground-referenced, the resulting VOUT = IOUT × ROUT is inherently ground-referenced - translating high-common-mode shunt voltage without optocouplers or transformers.
What is the role of the NC pin (Pin 3) on the LTC6103CMS8#PBF?
Pin 3 is a no-connect (NC) terminal - it is internally unbonded and must remain unconnected on the PCB. Routing traces to or placing copper near Pin 3 may introduce parasitic capacitance or leakage paths; best practice is to leave it fully isolated with solder mask coverage.
Does the LTC6103CMS8#PBF require external compensation capacitors?
No external compensation is required for stability under typical operating conditions. The LTC6103CMS8#PBF is internally compensated for unity-gain stability with RIN ≥ 100 Ω and ROUT ≤ 10 kΩ. However, output filtering (e.g., capacitor across ROUT) is recommended for noise reduction in EMI-prone environments.
LTC6103CMS8#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
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 140 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- -
- Current - Output / Channel:
- 1 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6103CMS8#PBF FAQ
1.How can I place an order for LTC6103CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6103CMS8#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 LTC6103CMS8#PBF reliable?
The price and inventory of LTC6103CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6103CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6103CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6103CMS8#PBF transactions.
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4.How is shipping managed for LTC6103CMS8#PBF?
LTC6103CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6103CMS8#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 LTC6103CMS8#PBF?
For technical support, including LTC6103CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6103CMS8#PBF requirements.
6.How does Aetrix verify that LTC6103CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6103CMS8#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 LTC6103CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6103CMS8#PBF?
All LTC6103CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6103CMS8#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 LTC6103CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6103CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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