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Analog Devices Inc. LTC6104CMS8#PBF
- Part No.:
- LTC6104CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6104CMS8#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,908
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Product details
Overview
LTC6104CMS8#PBF from Analog Devices (formerly Linear Technology) is a high-voltage, high-side, bi-directional current sense amplifier designed for precision shunt-based current monitoring in power rails up to 60V. It features ±450µV maximum input offset voltage, 1µs response time, and operates from 4V to 60V supply with only 520µA quiescent current at 12V - enabling accurate battery monitoring and load protection in automotive and industrial power management systems.
For engineers reviewing the LTC6104CMS8#PBF datasheet, LTC6104CMS8#PBF pinout, LTC6104CMS8#PBF application, or LTC6104CMS8#PBF equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and accuracy behavior across –40°C to 125°C, and real-world design guidance for bi-directional gain configuration using external RIN/ROUT.
Technical Context
The LTC6104CMS8#PBF integrates two independent high-side sense amplifiers (A and B) that activate selectively based on polarity of VSENSE: Amplifier A drives positive-sense current (VSENSE > 0) via –INA, while Amplifier B handles negative-sense current (VSENSE < 0) via –INB, feeding a current mirror to reverse output polarity. Each path supports independent gain setting via external RIN, enabling asymmetric forward/reverse scaling.
Its transconductance architecture converts VSENSE into a proportional output current (IOUT = ±VSENSE/RIN) delivered to an external ROUT-to-VREF network, yielding ground-referenced VOUT = IOUT·ROUT + VREF. PSRR exceeds 110dB across 4V–60V supply range, and internal MOSFET output stage sustains ±1mA output current with rail-to-rail compliance down to 0.25V above V–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4V to 60V - supports wide-input DC-DC converters, battery stacks, and 48V industrial buses without external regulators. |
| Input Offset Voltage | ±450µV max - enables use of low-value shunts (e.g., 5mΩ) while maintaining ≥75dB dynamic range at ±500mV full-scale. |
| Response Time | 1µs - allows fast overcurrent detection and shut-off control for load protection in power supplies and motor drivers. |
| Output Current | ±1mA max - sets practical upper limit for RIN selection (e.g., RIN ≥ 500Ω for ±500mV input) and constrains PCB trace heating. |
| PSRR | ≥110dB - rejects supply ripple and noise in noisy high-power environments, preserving measurement integrity without extra filtering. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive, industrial motor control, and telecom power applications. |
| Input Bias Current | 170nA max - minimizes error from trace resistance and enables Kelvin sensing with minimal layout sensitivity. |
Pinout & Package
Package: 8-lead MSOP (MS8), 3mm × 3mm, 0.65mm pitch, θJA = 300°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Current output node | Sources or sinks IOUT = ±VSENSE/RIN; requires external ROUT and VREF to generate VOUT; cannot swing below V–. |
| 4 - V– | Negative supply / ground reference | Return path for supply current and output current; must be low-impedance for accuracy and stability. |
| 5 - +INB/VS | Positive input of Amp B & supply input | Carries total supply current (IS); trace resistance here introduces offset error - requires short, wide routing. |
| 6 - –INB | Negative input of Amp B (for VSENSE < 0) | Driven to match +INB potential during negative-sense operation; connects to shunt's low-side for Kelvin sensing. |
| 7 - –INA | Negative input of Amp A (for VSENSE > 0) | Driven to match +INA potential during positive-sense operation; connects to shunt's low-side for Kelvin sensing. |
| 8 - +INA | Positive input of Amp A (for VSENSE > 0) | Connects to shunt's high-side; forms differential pair with –INA to reject common-mode voltage up to 60V. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional sense with separate gain paths | Independent RIN resistors for +VSENSE (via –INA) and –VSENSE (via –INB) enable asymmetric scaling - e.g., tighter tolerance on charge vs. discharge current in battery systems. |
| High-side operation up to 60V | Measures current on hot-side of load without ground disruption - eliminates need for low-side shunt insertion and preserves system ground integrity. |
| Low quiescent current (520µA @ 12V) | Enables always-on monitoring in battery-powered systems (e.g., backup power, energy harvesting) without significant standby drain. |
| 110dB+ PSRR | Maintains accuracy despite supply ripple from switching regulators - avoids additional LDOs or LC filters in compact power designs. |
| Kelvin-compatible inputs | +INA/–INA and +INB/–INB support 4-wire shunt connection - cancels PCB trace resistance errors critical for sub-mΩ shunts and high-current applications. |
Applications
| Battery Management System (BMS) | Industrial DC Motor Control |
|---|---|
|
Use Scenario: Monitoring bidirectional current in lithium-ion battery packs during charge/discharge cycles, including cell balancing and fault detection. IC Role / Device Role / Timing Role: High-side current sense amplifier translating ±500mV shunt voltage into ground-referenced output for ADC sampling. Use Value: ±450µV offset enables resolution of ±20mA at 5mΩ shunt; 1µs response supports fast overcurrent shutdown before damage occurs. |
Use Scenario: Closed-loop current regulation in 24V–48V brushed/BLDC motor drives with regenerative braking capability. IC Role / Device Role / Timing Role: Bi-directional current feedback element interfacing shunt to PWM controller or microcontroller ADC. Use Value: Independent gain paths allow optimized scaling for motoring (+I) and regeneration (–I), improving ADC utilization and control loop fidelity. |
| Telecom Power Shelf Monitoring | Automotive 48V Mild Hybrid Systems |
|
Use Scenario: Real-time load current supervision across multiple 48V DC-DC modules in carrier-grade power shelves. IC Role / Device Role / Timing Role: High-voltage sense front-end converting shunt voltage to isolated analog signal for system supervisor MCU. Use Value: 60V supply rating and 110dB PSRR ensure stable operation amid high dv/dt noise from adjacent converters and hot-swap events. |
Use Scenario: Monitoring starter-generator current in 48V P0/P1 hybrid architectures where bidirectional power flow is essential. IC Role / Device Role / Timing Role: AEC-Q200–qualified current sensor (LTC6104H variant) providing feedback to vehicle ECU for torque and efficiency control. Use Value: –40°C to 125°C operation and ±1mA output drive support direct interface to automotive-grade ADCs without buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional high-side current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Fixed gain (20V/V), integrated RIN; ±10µV offset; 4.5V–80V supply; AEC-Q200 qualified | Lower offset enables higher resolution at small shunts; no external RIN flexibility; limited to unidirectional or fixed-gain bidirectional use | Select when highest DC accuracy and automotive qualification are required, and gain configurability is not needed. |
| MAX40056ATA+T | Programmable gain (10/20/50/100V/V); ±150µV offset; 2.7V–60V supply; no separate negative-sense path | Single-path architecture simplifies layout but requires external polarity inversion for true bidirectional output; lower supply min | Select when programmable gain and ultra-low supply voltage are priorities, and external op-amp inversion is acceptable. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LTC6104CMS8#PBF uniquely provides independent, resistor-configurable gain for both current directions - enabling asymmetric scaling critical for battery charge/discharge asymmetry or motor regeneration optimization - while maintaining industry-leading offset and PSRR in an MSOP package.
Availability
LTC6104CMS8#PBF is available at Aetrix Electronics and suitable for battery management, industrial motor control, and telecom power shelf applications requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to 125°C.
Supply support for LTC6104CMS8#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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC6104 belongs to ADI's precision current sense amplifier product line, engineered specifically for high-voltage, high-side, bi-directional monitoring in demanding power systems where accuracy, speed, and thermal robustness are critical.
FAQ
What is the maximum input sense voltage supported by the LTC6104CMS8#PBF?
The LTC6104CMS8#PBF supports a maximum input sense voltage of ±500mV across the external shunt resistor under specified conditions (6V ≤ VS ≤ 60V, RIN = 1kΩ, ROUT = 2kΩ, VREF = 2V). This full-scale range enables accurate monitoring of high currents with low-value shunts while maintaining linearity and minimizing power loss.
How does the LTC6104CMS8#PBF achieve bi-directional current sensing without external polarity reversal?
The LTC6104CMS8#PBF achieves true bi-directional sensing using two internal amplifiers: Amplifier A activates for positive VSENSE (via –INA), while Amplifier B activates for negative VSENSE (via –INB) and drives a current mirror that reverses output polarity. This architecture eliminates need for external op-amps or switches, reducing component count and board space.
Can the LTC6104CMS8#PBF operate from a single 5V supply?
Yes, the LTC6104CMS8#PBF operates from 4V to 60V, making it fully functional at 5V. At VS = 5V, its minimum output voltage is 0.25V and maximum is 1V (per Electrical Characteristics table), requiring appropriate VREF and ROUT selection to maintain output swing within these bounds while preserving dynamic range.
What is the role of the +INB/VS pin on the LTC6104CMS8#PBF?
The +INB/VS pin serves dual functions: it is the positive input terminal for Amplifier B and the primary supply input for both internal amplifiers. All supply current flows through this pin, so PCB trace resistance here directly introduces offset error - necessitating short, wide routing and careful Kelvin layout to avoid measurement degradation.
Does the LTC6104CMS8#PBF require external components to set gain, and if so, how many?
Yes, the LTC6104CMS8#PBF requires two external resistors per direction to configure gain: one RIN resistor connected to –INA for positive-sense current, and another RIN resistor connected to –INB for negative-sense current. Gain is set as G = ROUT/RIN, allowing fully independent scaling for forward and reverse current paths.
LTC6104CMS8#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:
- -
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 85 µV
- Current - Supply:
- 640µA
- Current - Output / Channel:
- 1 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6104CMS8#PBF FAQ
1.How can I place an order for LTC6104CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6104CMS8#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 LTC6104CMS8#PBF reliable?
The price and inventory of LTC6104CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6104CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6104CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6104CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6104CMS8#PBF?
LTC6104CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6104CMS8#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 LTC6104CMS8#PBF?
For technical support, including LTC6104CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6104CMS8#PBF requirements.
6.How does Aetrix verify that LTC6104CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6104CMS8#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 LTC6104CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6104CMS8#PBF?
All LTC6104CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6104CMS8#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 LTC6104CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6104CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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