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Analog Devices Inc. LTC6104CMS8#TRPBF
- Part No.:
- LTC6104CMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6104CMS8#TRPBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,839
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Product details
Overview
LTC6104CMS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, high-side, bi-directional current sense amplifier designed for precision load current monitoring in power rails up to 60V. It features ±450µV max offset voltage, 1µs response time, and operates from 4V to 60V supply with only 520µA quiescent current at 12V - enabling accurate shunt-based current measurement in automotive battery management and industrial power supplies.
For engineers reviewing the LTC6104CMS8#TRPBF datasheet, LTC6104CMS8#TRPBF pinout, LTC6104CMS8#TRPBF application, or LTC6104CMS8#TRPBF equivalent, key selection criteria include bidirectional gain configurability via external resistors, ±500mV input sense range, PSRR ≥110dB, and guaranteed operation from –40°C to 125°C in the MS8 package.
Technical Context
The LTC6104CMS8#TRPBF integrates two independent high-side sense amplifiers (A and B) that activate selectively based on polarity of VSENSE across an external shunt. Amplifier A handles positive VSENSE (load sourcing), forcing –INA to match +INA; amplifier B handles negative VSENSE (load sinking), driving –INB to match +INB/VS while routing current through an internal current mirror.
Output is a transconductance current (IOUT = VSENSE/RIN) sourced/sunk at the OUT pin, converted to voltage via external ROUT and VREF. Gain is independently configurable per direction using RIN (100Ω typical), and output swing is constrained by V– (GND) and maximum output voltage limits (0.3V to 8V depending on VS and VREF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4V to 60V - supports wide-input industrial and automotive power rails without external regulators. |
| Max Input Sense Voltage | ±500mV - enables use of low-value, low-power-loss shunt resistors (e.g., ≤50mΩ for ±10A full-scale). |
| Offset Voltage | ±450µV max - ensures <±1.7mA error with 50mΩ shunt, critical for high-dynamic-range current sensing. |
| Response Time | 1µs - allows real-time detection of overcurrent events for fast load-shutdown protection. |
| PSRR | ≥110dB - rejects supply noise in noisy 12V/24V/48V systems without additional filtering. |
| Output Current | ±1mA max - sets practical upper limit for ROUT selection (e.g., 3kΩ yields 3V swing) and thermal design. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive and industrial ambient environments. |
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 terminal | Sources or sinks IOUT = VSENSE/RIN; requires external ROUT + VREF to generate ground-referenced VOUT. |
| 4 - V– | Negative supply / ground reference | Return path for output current and internal bias; must be low-impedance for accuracy and stability. |
| 5 - +INB/VS | Positive input of Amp B & supply input | Connects to high-side rail; supplies device current - trace resistance here introduces offset error. |
| 6 - –INB | Negative input of Amp B | Kelvin connection point for shunt's low-side; sets IOUT magnitude during negative VSENSE (sink mode). |
| 7 - –INA | Negative input of Amp A | Kelvin connection point for shunt's high-side; sets IOUT magnitude during positive VSENSE (source mode). |
| 8 - +INA | Positive input of Amp A | Connected to shunt's high-side node; referenced to +INB/VS - forms high-side differential pair with –INA. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional sensing | Separate internal amplifiers for source/sink current enable true net-load monitoring without polarity reversal. |
| Configurable gain per direction | RIN resistor on –INA or –INB independently sets transconductance gain for each current flow direction. |
| High PSRR (≥110dB) | Maintains accuracy in presence of switching regulator ripple or bus transients without added supply filtering. |
| Low quiescent current (520µA) | Enables always-on current monitoring in battery-backed systems with minimal standby power penalty. |
| Wide temperature range (–40°C to 125°C) | Supports deployment in engine compartments, motor drives, and industrial control cabinets without derating. |
Applications
| Battery Management System (BMS) | Industrial DC Power Supply Monitoring |
|---|---|
|
Use Scenario: Real-time bidirectional current tracking in 48V EV auxiliary battery packs during charge/discharge cycles. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to proportional output current for ADC digitization. Use Value: ±450µV offset enables <±2mA error with 250mΩ shunt, supporting precise state-of-charge estimation over full temperature range. |
Use Scenario: Overcurrent warning and shutdown in programmable 24V/5A lab power supplies with digital control loop. IC Role / Device Role / Timing Role: Fast-response current monitor feeding fault logic and microcontroller interrupt line. Use Value: 1µs response time detects short-circuit events before MOSFETs fail, improving system reliability. |
| Automotive Body Control Module (BCM) | Server PSU Current Telemetry |
|
Use Scenario: Load current supervision for LED headlamp drivers and HVAC blower motors in AEC-Q100-compliant modules. IC Role / Device Role / Timing Role: High-voltage sense interface translating shunt voltage into isolated analog signal for MCU ADC. Use Value: 60V absolute max supply rating accommodates load dump transients up to 70V without clamping. |
Use Scenario: Accurate input/output current reporting in 12V server VRMs for power budgeting and thermal management. IC Role / Device Role / Timing Role: Precision current transducer feeding PMBus/I²C ADC subsystem via buffered VOUT. Use Value: PSRR ≥110dB rejects high-frequency switching noise from adjacent buck converters, ensuring clean telemetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side bi-directional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Fixed gain (20V/V), single-direction output polarity, integrated EMI filter; no separate sink/source gain config. | Requires external inversion circuitry for bidirectional voltage output; less flexible for asymmetric current ranges. | Preferred when fixed-gain simplicity and AEC-Q100 qualification outweigh need for independent gain tuning. |
| MAX40056ATA+T | Higher bandwidth (1.5MHz), lower offset (±150µV), but limited to 36V supply and no current-mirror architecture. | Not suitable for >36V rails (e.g., 48V telecom); lacks native bidirectional current mirroring - relies on external op-amp summing. | Chosen for ultra-low-offset, high-speed sensing below 36V where layout space permits discrete summing network. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LTC6104CMS8#TRPBF uniquely supports independent gain configuration per current direction using only two external resistors, delivers true bidirectional current output without polarity inversion circuitry, and maintains accuracy across the full 4V–60V supply range - making it optimal for asymmetric load monitoring in high-voltage industrial and automotive systems.
Availability
LTC6104CMS8#TRPBF is available at Aetrix Electronics and suitable for battery management, industrial power supply monitoring, and automotive body control applications requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to 125°C.
Supply support for LTC6104CMS8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and RF ICs for precision signal conditioning and power management.
The LTC6104 belongs to Linear's precision current sense amplifier family, engineered for high-voltage, high-accuracy, bi-directional current monitoring in harsh environments where offset, speed, and supply flexibility are critical.
FAQ
What is the maximum supply voltage the LTC6104CMS8#TRPBF can withstand?
The LTC6104CMS8#TRPBF has an absolute maximum total supply voltage of 70V between +INB(VS) and V–. Its specified operating range is 4V to 60V, and exceeding 60V continuously may compromise long-term reliability or parametric guarantees. Applications exposed to load dump transients should verify clamp protection if peak voltages approach 70V.
How does the LTC6104CMS8#TRPBF achieve bi-directional current sensing without external op-amps?
The LTC6104CMS8#TRPBF integrates two dedicated high-side amplifiers (A and B) with independent inputs (+INA/–INA and +INB/–INB). When VSENSE is positive, Amp A activates and forces –INA to +INA potential; when VSENSE is negative, Amp B activates and drives –INB to +INB/VS, routing current through an internal current mirror that reverses polarity at the OUT pin - eliminating need for external inversion circuitry.
Can the LTC6104CMS8#TRPBF operate from a single 5V supply?
Yes, the LTC6104CMS8#TRPBF operates down to 4V supply. At VS = 5V, its maximum input sense voltage remains ±500mV, but output voltage swing is reduced: VOUT(MIN) = 0.25V and VOUT(MAX) = 1V (per Electrical Characteristics table). Designers must select VREF and ROUT accordingly to maintain required dynamic range within this constrained window.
What is the role of the +INB/VS pin on the LTC6104CMS8#TRPBF?
The +INB/VS pin serves dual functions: it is the positive input terminal for internal amplifier B and the primary supply input for both amplifiers. All device supply current flows through this pin, so PCB trace resistance here directly modulates the effective input offset voltage - requiring short, wide, low-impedance routing to minimize error.
Does the LTC6104CMS8#TRPBF require external components to set gain?
Yes, gain is set entirely by external resistors: RIN connected between –INA or –INB and the shunt defines transconductance (IOUT = VSENSE/RIN), while ROUT from OUT to VREF converts output current to voltage (VOUT = IOUT × ROUT + VREF). No internal gain-setting resistors exist - enabling precise, temperature-stable, and direction-specific gain configuration.
LTC6104CMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC6104CMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6104CMS8#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 LTC6104CMS8#TRPBF reliable?
The price and inventory of LTC6104CMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6104CMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6104CMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6104CMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6104CMS8#TRPBF?
LTC6104CMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6104CMS8#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 LTC6104CMS8#TRPBF?
For technical support, including LTC6104CMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6104CMS8#TRPBF requirements.
6.How does Aetrix verify that LTC6104CMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6104CMS8#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 LTC6104CMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6104CMS8#TRPBF?
All LTC6104CMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6104CMS8#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 LTC6104CMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC6104CMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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