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Analog Devices Inc. LTC6104IMS8#PBF
- Part No.:
- LTC6104IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6104IMS8#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:326
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Product details
Overview
LTC6104IMS8#PBF from Analog Devices (formerly Linear Technology) is a high-voltage, high-side, bi-directional current sense amplifier designed for precision load current monitoring in automotive and industrial power systems. It operates from 4V to 60V supply, delivers ±1mA output current, achieves ±450µV max offset, and responds in 1µs - enabling real-time overcurrent warning and shutoff control in battery management and DC-DC converter feedback loops.
For engineers reviewing the LTC6104IMS8#PBF datasheet, LTC6104IMS8#PBF pinout, LTC6104IMS8#PBF application, or LTC6104IMS8#PBF equivalent, key selection criteria include its dual-gain-configurable architecture, Kelvin-input compatibility, ±500mV input sense range, and MSOP-8 package suitability for space-constrained high-voltage PCB layouts.
Technical Context
The LTC6104IMS8#PBF integrates two independent high-side sense amplifiers (A and B) that activate exclusively based on polarity of VSENSE across an external shunt: Amplifier A drives current when VSENSE > 0; Amplifier B activates with internal current mirror inversion when VSENSE < 0. Each path uses separate external RIN resistors to set transconductance independently.
Its output is a ground-referenced current (IOUT = VSENSE/RIN) converted to voltage via external ROUT and VREF. PSRR exceeds 110dB across 4–60V supply, and input bias current remains ≤170nA - critical for minimizing gain error in high-impedance sensing networks with small shunts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4V to 60V - supports direct connection to 12V/24V/48V bus rails without external regulators |
| Max Input Sense Voltage | ±500mV - enables use of low-value, low-power-loss shunts (e.g., 50mΩ at ±10A) |
| Offset Voltage | ±450µV max - limits minimum resolvable current; e.g., 9µA error with 50mΩ shunt |
| Response Time | 1µs - sufficient for cycle-by-cycle overcurrent protection in switching power supplies |
| PSRR | ≥110dB - rejects supply ripple without additional filtering in noisy automotive environments |
| Output Current | ±1mA max - sets practical upper limit for ROUT selection to avoid output saturation |
| Temp Range | –40°C to 125°C - qualified for under-hood automotive and industrial motor drive applications |
Pinout & Package
The LTC6104IMS8#PBF is housed in an 8-lead MSOP package (3mm × 3mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin 1 is OUT; Pin 4 is V– (ground reference); Pins 5 and 8 are +INB/VS and +INA respectively; Pins 6 and 7 are –INB and –INA - supporting true Kelvin sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Current output node | Sources/sinks proportional current (IOUT = VSENSE/RIN); requires external ROUT+VREF to generate voltage output |
| 4 - V– | Negative supply / ground reference | Return path for output current and internal amplifiers; must be low-impedance for accuracy |
| 5 - +INB/VS | Positive input of Amp B & supply input | Carries both sense signal and total device supply current; trace resistance here induces offset error |
| 6 - –INB | Negative input of Amp B | Kelvin-connected to shunt low-side for negative-current sensing; sets IOUT = VSENSE/RINB |
| 7 - –INA | Negative input of Amp A | Kelvin-connected to shunt low-side for positive-current sensing; sets IOUT = VSENSE/RINA |
| 8 - +INA | Positive input of Amp A | Connected to shunt high-side; completes differential sense path for forward current direction |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional sensing with polarity-selective amplifiers | Eliminates need for external H-bridge or multiplexing; enables single-shunt battery charge/discharge monitoring |
| Separately configurable gain per direction | Allows optimization of resolution for charge vs. discharge currents using distinct RINA and RINB values |
| Low 520µA supply current at 12V | Reduces self-heating and system power overhead in always-on battery monitoring circuits |
| 110dB minimum PSRR | Maintains accuracy despite supply rail noise from switching regulators or motor commutation |
| MSOP-8 with exposed thermal pad | Enables compact layout while supporting >100mW dissipation in high-VS/high-IOUT conditions |
Applications
| Battery Management System (BMS) | Industrial DC Motor Drive |
|---|---|
Use Scenario: Monitoring bidirectional current in lithium-ion battery packs during charging and discharging cycles. IC Role / Device Role / Timing Role: High-side current sense amplifier translating shunt voltage into ground-referenced output for ADC sampling. Use Value: ±450µV offset enables accurate measurement down to ~10mA with 50mΩ shunt, supporting state-of-charge estimation within ±0.5% error. | Use Scenario: Real-time load current feedback in 24V/48V brushed or BLDC motor controllers. IC Role / Device Role / Timing Role: High-voltage sense front-end providing fast overcurrent detection (<1µs) for hardware fault shutdown. Use Value: 1µs response time allows detection before MOSFET destruction in short-circuit events; 60V rating covers back-EMF spikes. |
| Automotive Body Control Module (BCM) | Telecom Power Shelf |
Use Scenario: Fuseless load monitoring for lighting, HVAC, and window lift actuators in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: High-side current sensor feeding microcontroller ADC for diagnostics and load profiling. Use Value: –40°C to 125°C operation ensures reliability in engine bay and cabin environments; 4V min supply supports cold-cranking conditions. | Use Scenario: Output current monitoring in redundant 48V DC-DC converters powering server racks. IC Role / Device Role / Timing Role: Precision current sense element in digital power management IC feedback loop. Use Value: ±500mV input range accommodates wide dynamic current (1A–100A) with single shunt; low bias current avoids gain drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side bi-directional current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40056ASA+T | Fixed 50V max supply; ±100µV max offset; integrated 2.5V reference; no separate gain configuration per direction | Lower offset improves sub-10mA resolution but lacks independent forward/reverse gain tuning | Select when highest DC accuracy is required and bidirectional gain flexibility is unnecessary |
| INA240A1QDRQ1 | Automotive-grade (AEC-Q100); 80V abs max; ±100µV max offset; fixed gain (20V/V, 50V/V, 100V/V); no current-output architecture | Voltage-output design simplifies interface but limits dynamic range scaling vs. current-output topology | Select for automotive production where AEC-Q100 qualification and voltage output are mandatory |
Compared with MAX40056ASA+T and INA240A1QDRQ1, the LTC6104IMS8#PBF uniquely supports independent gain setting for charge and discharge paths via external RIN resistors - essential for asymmetric current ranges in battery systems - while maintaining robust 60V operation and industry-leading PSRR for noisy power domains.
Availability
LTC6104IMS8#PBF is available at Aetrix Electronics and suitable for battery management, industrial motor control, and automotive body electronics requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for LTC6104IMS8#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, serving industrial, automotive, communications, and healthcare markets.
The LTC6104IMS8#PBF belongs to ADI's precision current sense amplifier product line, engineered specifically for high-voltage, bi-directional, high-accuracy current monitoring in safety-critical and energy-efficient power systems.
FAQ
What is the absolute maximum supply voltage for the LTC6104IMS8#PBF?
The absolute maximum total supply voltage (+INB to V–) for the LTC6104IMS8#PBF is 70V. Operation beyond this risks permanent damage. The recommended operating range remains 4V to 60V, with full specifications guaranteed across that span. Exceeding 70V even momentarily violates Absolute Maximum Ratings and may compromise long-term reliability - always include clamping or overvoltage protection in designs where transient surges exceed 60V.
Can the LTC6104IMS8#PBF measure current in both directions using a single shunt resistor?
Yes, the LTC6104IMS8#PBF is explicitly designed for bi-directional current sensing with one external shunt. It uses two internal amplifiers: Amplifier A activates for positive VSENSE (load current flow), generating IOUT = VSENSE/RINA; Amplifier B activates for negative VSENSE (reverse current), driving IOUT = VSENSE/RINB through an internal current mirror. This eliminates need for dual-shunt or external switching - a core feature confirmed in the LTC6104IMS8#PBF datasheet block diagram and theory of operation.
What is the purpose of the +INB/VS pin (Pin 5) on the LTC6104IMS8#PBF?
Pin 5 (+INB/VS) serves a dual function: it is the positive input terminal for internal Amplifier B *and* the primary supply input for the entire LTC6104IMS8#PBF. All device supply current flows through this pin. Because it carries both signal and power, PCB trace resistance here introduces a supply-induced offset error proportional to IS × RT. Layout best practice mandates short, wide traces and Kelvin routing to minimize this effect - a requirement explicitly documented in the LTC6104IMS8#PBF Applications Information section.
Does the LTC6104IMS8#PBF require external resistors to set gain, and why?
Yes, the LTC6104IMS8#PBF requires external RIN resistors (RINA for positive current, RINB for negative current) to define transconductance gain (IOUT = VSENSE/RIN). Unlike fixed-gain current sense amplifiers, this architecture provides full flexibility to optimize resolution independently for charge and discharge paths. For example, RINA = 100Ω yields 10mA/mV sensitivity for high-current discharge, while RINB = 1kΩ gives 1mA/mV for precise low-current charging - a capability intrinsic to the LTC6104IMS8#PBF's dual-amplifier design.
How does the LTC6104IMS8#PBF handle output voltage translation given its current-output architecture?
The LTC6104IMS8#PBF outputs a current (IOUT), not a voltage. To generate a usable voltage, an external ROUT resistor and VREF voltage source must be connected: VOUT = IOUT × ROUT + VREF. This allows programmable output swing (e.g., 0.3V to 4.7V) by selecting ROUT and VREF - unlike voltage-output amplifiers with fixed compliance. The LTC6104IMS8#PBF datasheet specifies ROUT and VREF design constraints to ensure VOUT stays within 0.3V–8V limits and avoids saturation, making this conversion step essential and fully defined in the LTC6104IMS8#PBF application circuits.
LTC6104IMS8#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6104IMS8#PBF FAQ
1.How can I place an order for LTC6104IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6104IMS8#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 LTC6104IMS8#PBF reliable?
The price and inventory of LTC6104IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6104IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6104IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6104IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6104IMS8#PBF?
LTC6104IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6104IMS8#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 LTC6104IMS8#PBF?
For technical support, including LTC6104IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6104IMS8#PBF requirements.
6.How does Aetrix verify that LTC6104IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6104IMS8#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 LTC6104IMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6104IMS8#PBF?
All LTC6104IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6104IMS8#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 LTC6104IMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6104IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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