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Analog Devices Inc. LT6100CMS8#PBF
- Part No.:
- LT6100CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT6100CMS8#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,430
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Product details
Overview
LT6100CMS8#PBF from Analog Devices (formerly Linear Technology) is a precision, 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.
For engineers reviewing the LT6100CMS8#PBF datasheet, LT6100CMS8#PBF pinout, LT6100CMS8#PBF application, or LT6100CMS8#PBF equivalent, key selection criteria include its 4.1V–48V common-mode input range, reverse-battery protection to –48V, buffered output with 15mV minimum swing, 12kHz noise filtering capability, and MSOP-8 package compatibility with space-constrained industrial and portable designs.
Technical Context
The LT6100CMS8#PBF uses an Over-The-Top® input topology to maintain functionality at VS+ voltages up to 48V while referenced to VEE (ground or negative rail). Its two-stage architecture first level-shifts and amplifies the sense voltage with fixed 10V/V gain (A1 stage), then applies programmable op-amp gain (A2) via pins A2 and A4 to achieve total gains of 10, 12.5, 20, 25, 40, or 50V/V.
It integrates a dedicated filter pin (FIL) connected to internal 60kΩ resistance, enabling single-capacitor low-pass filtering (e.g., 220pF → 12kHz rolloff). With >105dB CMRR and PSRR, it maintains accuracy in noisy, high-common-mode environments such as automotive battery monitoring or industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.5% max over temperature - ensures stable current measurement without calibration in production systems. |
| Sense Input Range | 4.1V to 48V common-mode - supports direct monitoring of 12V/24V/48V rails and MOSFET/fuse voltage drops. |
| Input Offset Voltage | ±300µV max (MSOP package) - enables resolution of sub-mA currents with typical 10mΩ–100mΩ sense resistors. |
| Supply Current | 60µA typical at VCC = 5V - suitable for always-on battery-powered applications with multi-year runtime. |
| Reverse Battery Protection | Withstands –48V on VS+/VS– with VCC unpowered - eliminates need for external protection diodes in automotive systems. |
| Power-Down Input Leakage | 1nA max when VCC = 0V - prevents loading of monitored circuit during standby or fault conditions. |
| Operating Temperature | 0°C to 70°C (C-grade) - validated for commercial and industrial control applications with ambient thermal margins. |
Pinout & Package
The LT6100CMS8#PBF is housed in an 8-lead plastic MSOP (MS8) package with exposed pad soldered to PCB for thermal performance. Pin 1 is marked by a dot or beveled edge; the exposed pad is electrically connected to VEE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS– (Pin 1) | Negative sense input | Connects to low-side of sense resistor; internally tied to 5kΩ resistor; withstands up to 48V above VEE. |
| VCC (Pin 2) | Positive supply input | Powers both sense amplifier and output op-amp; operates from 2.7V to 36V; powers down inputs to <1nA leakage. |
| FIL (Pin 3) | Noise filter node | Internal connection to 60kΩ network; add capacitor to VEE for configurable low-pass filtering (e.g., 220pF → 12kHz). |
| VEE (Pin 4) | Negative supply / ground | Reference for output and internal circuitry; exposed pad is connected to this pin; must be solidly grounded. |
| VOUT (Pin 5) | Buffered output | Amplified, level-shifted representation of VSENSE × gain; swings 15mV above VEE to within 75mV of VCC. |
| A2 (Pin 6) | Gain select input | Strap to VEE or leave open to set A2 op-amp gain (1×, 1.25×, 2×, 2.5×); combined with A4 determines total gain. |
| A4 (Pin 7) | Gain select input | Strap to VEE or leave open to configure A2 gain multiplier; pairing with A2 selects one of six total gains (10–50V/V). |
| VS+ (Pin 8) | Positive sense input | Connects to high-side of sense resistor; internally tied to 5kΩ resistor; functional up to 48V above VEE. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable gain | Six precise gains (10/12.5/20/25/40/50V/V) set by strapping A2/A4 pins - eliminates external gain-setting resistors and layout dependencies. |
| Over-The-Top® input stage | Enables operation with VS+ up to 48V while VCC is as low as 2.7V - supports high-side sensing in low-voltage control domains. |
| Reverse-battery tolerant | Survives –48V applied to VS+/VS– with VCC unpowered - removes need for series diodes in automotive battery monitoring. |
| Low-power shutdown mode | Input leakage drops to ≤1nA when VCC = 0V - preserves battery integrity in always-connected systems like telematics or security modules. |
| Integrated noise filtering | FIL pin provides direct access to internal 60kΩ RC node - simplifies EMI mitigation with one external capacitor instead of discrete filters. |
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 handheld test equipment. 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 cutoff using ±300µV offset and 0.5% gain accuracy - critical for safety-critical battery management. | Use Scenario: Detecting open-circuit faults in automotive power distribution fuses or industrial motor protection circuits. IC Role / Device Role / Timing Role: High-side monitor placed upstream of fuse; outputs rail-to-rail signal indicating current flow collapse during blow events. Use Value: Withstands 48V differential and reverse-battery conditions (-48V), eliminating external protection components and reducing BOM cost by ≥3 parts per channel. |
| Portable Power Management | Industrial DC Power Supplies |
Use Scenario: Measuring load current in USB-C PD adapters, wireless charging transmitters, or compact DC-DC modules where board space and quiescent current are constrained. IC Role / Device Role / Timing Role: Micropower (60µA) current sensor feeding feedback loop or host microcontroller for dynamic load regulation. Use Value: 60µA supply current and 1nA power-down leakage extend battery life in always-on portable systems; MSOP-8 footprint fits tight layouts. | Use Scenario: Monitoring output current in programmable bench power supplies or PLC I/O modules requiring high common-mode rejection and wide input range. IC Role / Device Role / Timing Role: Precision current sense front-end with >105dB CMRR/PSRR, rejecting ripple and supply noise in 24V/48V industrial rails. Use Value: Maintains ±0.5% gain accuracy across 0°C–70°C and rejects 100dB+ of supply/CM noise - ensures stable closed-loop regulation under varying line/load conditions. |
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 |
|---|---|---|---|
| INA240A1QDGKRQ1 | Automotive-grade (AEC-Q100), higher bandwidth (400kHz), but fixed 20V/V gain and 1.5mV offset - lacks pin-selectable gain flexibility. | Targeted for automotive battery disconnect units and motor phase current sensing where qualification is mandatory. | Select if AEC-Q100 compliance and higher speed are required; avoid if gain configurability or ultra-low offset (<300µV) is critical. |
| MAX40056ATA+T | Wider common-mode range (–0.1V to 65V), lower offset (±50µV), but requires external gain resistors and draws 120µA - no integrated FIL pin. | Better suited for high-accuracy lab equipment or telecom power shelves needing extended voltage range and sub-100µV offset. | Select for highest precision in non-space-constrained designs; avoid if board area, filter integration, or micropower operation are priorities. |
Compared with INA240A1QDGKRQ1 and MAX40056ATA+T, the LT6100CMS8#PBF uniquely combines pin-selectable gain, 60µA quiescent current, integrated noise filtering, and reverse-battery tolerance - making it optimal for cost-sensitive, space-constrained commercial and industrial current monitoring where flexibility and robustness outweigh raw offset or speed specs.
Availability
LT6100CMS8#PBF is available at Aetrix Electronics and suitable for battery monitoring, fuse monitoring, and portable power management applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT6100CMS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT6100CMS8#PBF belongs to ADI's precision current sense amplifier product line, engineered for high-side unidirectional current monitoring in space- and power-constrained systems where accuracy, robustness, and ease of use are essential.
FAQ
What is the maximum common-mode voltage the LT6100CMS8#PBF can handle on its sense inputs?
The LT6100CMS8#PBF supports a sense input common-mode voltage range from 4.1V to 48V relative to VEE. Its differential sense voltage rating is ±48V, and it withstands reverse-battery conditions down to –48V on VS+/VS– when VCC is unpowered - confirmed in Absolute Maximum Ratings and Applications Information sections of the datasheet.
How do I configure the LT6100CMS8#PBF for a gain of 25V/V?
To configure the LT6100CMS8#PBF for 25V/V gain, connect Pin 6 (A2) to VEE and leave Pin 7 (A4) open (floating), as specified in Table 1 of the datasheet. This sets the internal op-amp A2 gain to 2.5×, resulting in total system gain AV = 10 × 2.5 = 25V/V. No external resistors are needed.
Does the LT6100CMS8#PBF require external components for basic operation?
Yes - the LT6100CMS8#PBF requires at minimum: (1) an external sense resistor (RSENSE) between VS+ and VS–, (2) bypass capacitors (0.1µF) on VCC and VEE, and (3) a pull-down or floating configuration on A2/A4 pins for gain selection. The FIL pin is optional but recommended for noise filtering (e.g., 220pF to VEE).
Can the LT6100CMS8#PBF operate with VCC disconnected while still connected to a live battery?
Yes - the LT6100CMS8#PBF features Over-The-Top® input architecture that keeps VS+/VS– inputs in high-impedance state (<1nA leakage) when VCC = 0V. This allows safe "always-connected" deployment in automotive or backup power systems without draining the battery or damaging the IC.
What is the minimum output voltage swing of the LT6100CMS8#PBF?
The LT6100CMS8#PBF has a minimum output voltage (VO(MIN)) of 15mV above VEE under no-load conditions, as specified in Electrical Characteristics. This rail limitation applies across all gains and temperatures, and defines the lowest measurable current before output clipping occurs.
LT6100CMS8#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:
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT6100CMS8#PBF FAQ
1.How can I place an order for LT6100CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6100CMS8#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 LT6100CMS8#PBF reliable?
The price and inventory of LT6100CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6100CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6100CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6100CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6100CMS8#PBF?
LT6100CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6100CMS8#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 LT6100CMS8#PBF?
For technical support, including LT6100CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6100CMS8#PBF requirements.
6.How does Aetrix verify that LT6100CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6100CMS8#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 LT6100CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT6100CMS8#PBF?
All LT6100CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6100CMS8#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 LT6100CMS8#PBF part is unused and in its original packaging.
Return procedure for LT6100CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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