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Analog Devices Inc. LTC6115HMS#PBF
- Part No.:
- LTC6115HMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6115HMS#PBF.pdf
- Description:
- IC CURR SENSE 2 CIRCUIT 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:184
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Product details
Overview
LTC6115HMS#PBF from Analog Devices is a high-voltage, high-side current and voltage sense amplifier in a 12-lead MSOP package. It integrates dual sensing paths: a ±500µV max offset current sense amplifier (5V–100V supply) and a ±0.15% max total gain error voltage sense amplifier with internal 1MΩ divider (0V–100V input). It delivers 1µs response time and rail-to-rail output for precision load monitoring in automotive battery management systems.
For engineers reviewing the LTC6115HMS#PBF datasheet, LTC6115HMS#PBF pinout, LTC6115HMS#PBF application, or LTC6115HMS#PBF equivalent, key selection criteria include high-side current sensing up to 100V common-mode, AEC-Q100 qualification for automotive use, configurable gain via external resistors, low 250µA V+ supply current, and operation over –40°C to 125°C.
Technical Context
The LTC6115HMS#PBF implements two independent signal chains: a transconductance current sense amplifier (A1) that converts shunt voltage into a proportional output current (OUTI), and a precision voltage sense amplifier (A2) with integrated 40:1 resistor divider referenced to VIN. Both paths feature separate supplies: V+ (5V–100V) powers the current path; VS (2.7V–5.5V) powers the voltage path.
Its architecture enables simultaneous, isolated monitoring of load current and bus voltage without ground-referenced shunt constraints. The current path achieves 118dB PSRR and 140kHz bandwidth at 200µA load; the voltage path delivers 300kHz GBW, 95dB PSRR, and <60µVP-P input noise (0.1Hz–10Hz) - enabling high-accuracy, low-drift measurements in noisy industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Sense Supply Range | 5V to 100V on V+ pin - supports direct high-side sensing in telecom power supplies and 48V/60V industrial buses without level-shifting circuitry. |
| Max Input Offset Voltage (Current) | ±500µV - limits minimum resolvable shunt voltage to ~5mV at gain=100, enabling accurate detection of sub-10mA currents with 50mΩ shunt. |
| Voltage Sense Input Range | 0V to 100V on VIN pin - internal 1MΩ divider attenuates by 40×, allowing direct connection to 100V rails while maintaining 2.5V full-scale at OUTV. |
| Total Gain Error (Voltage) | ±0.15% max - ensures <150mV absolute error at 100V input, critical for battery cell voltage balancing and PSU regulation feedback. |
| Response Time | 1µs - enables real-time overcurrent warning and fast shutdown control in motor drives and e-fuse applications. |
| Operating Temperature | –40°C to 125°C - qualified per AEC-Q100 Grade H, suitable for under-hood automotive modules and industrial edge controllers. |
| Supply Current (V+) | 250µA typical at 5V - minimizes self-heating and power loss in always-on battery monitoring circuits. |
Pinout & Package
Package: 12-lead plastic MSOP (θJA = 135°C/W, TJMAX = 150°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 12) | Noninverting input of current sense amplifier | Connects to load side of shunt resistor; Kelvin connection required for <1% accuracy at >1A loads. |
| –IN (Pin 1) | Inverting input of current sense amplifier | Driven to same potential as +IN by internal loop; connects to system V+ side of shunt via RIN. |
| OUTI (Pin 3) | Current output of current sense amplifier | Sources IOUTI = VSENSE/RIN; requires external ROUT to ground to generate voltage output (e.g., 10kΩ → 5V at 500mV sense). |
| VIN (Pin 9) | Voltage sense amplifier input | Accepts 0–100V; internally divided 40:1 before A2 - no external divider needed for high-voltage monitoring. |
| OUTV (Pin 6) | Voltage sense amplifier output | Rail-to-rail output (VS–0.035V to VS); configures full-scale via external gain resistors on FB pin for optimal ADC utilization. |
| FB (Pin 5) | Inverting input of voltage sense amplifier | Configures gain and reference point; connects to external resistor network to set OUTV full-scale (e.g., 1V to 5V). |
| V+ (Pin 11) | Positive supply for current sense circuit | Supplies current path only; must be ≥5V and ≤100V; independent of VS supply. |
| VS (Pin 7) | Positive supply for voltage sense circuit | 2.7V–5.5V only; powers A2 and internal divider; decoupling capacitor required near pin. |
| GND (Pin 4) | Analog ground reference | Common return for both sense paths; must be star-connected to minimize ground bounce errors. |
| NC (Pins 2, 8, 10) | No internal connection | Leave unconnected; no thermal or electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent sensing paths | Simultaneous current and voltage measurement eliminates need for separate ICs, reducing BOM count and PCB area in power rail monitors. |
| AEC-Q100 Grade H qualification | Guaranteed operation from –40°C to 125°C with full parametric performance, enabling use in engine control units and ADAS power domains. |
| Configurable gain via external resistors | RIN and ROUT set current sense gain; FB network sets voltage sense gain - allows optimization for specific dynamic range without custom ASICs. |
| High PSRR (118dB min) | Rejects supply ripple on V+ line, ensuring stable current readings even during switching regulator transients in DC-DC converter outputs. |
| Low input bias current (170nA max) | Minimizes error from leakage across high-value shunts or high-impedance voltage dividers, critical for µA-level battery leakage detection. |
Applications
| Battery Management System | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Real-time monitoring of 48V lithium-ion pack voltage and charge/discharge current in EV auxiliary systems. IC Role / Device Role / Timing Role: High-side current sense amplifier measures shunt voltage; voltage sense amplifier reads pack voltage directly at VIN pin. Use Value: Enables precise state-of-charge estimation and overcurrent protection with single-chip solution, eliminating isolation barriers and reducing system latency. |
Use Scenario: Continuous supervision of 60V telecom rectifier output voltage and load current in base station power shelves. IC Role / Device Role / Timing Role: Voltage sense path monitors 0–100V rail; current path detects short-circuit events within 1µs for fast shutdown. Use Value: Provides fault logging and redundancy without adding discrete op-amps or digital isolators, meeting GR-1089 immunity requirements. |
| Automotive Body Control Module | Server PSU Telemetry |
Use Scenario: Monitoring current draw of HVAC blower motor and 12V battery voltage in vehicle body controller. IC Role / Device Role / Timing Role: Current sense path handles 5–16V V+ range; voltage path uses internal 1MΩ divider for direct 12V sensing. Use Value: Supports ISO 16750-2 load dump immunity and meets AEC-Q100 H-grade thermal specs for under-dash mounting. |
Use Scenario: Per-rail telemetry in 12V/54V server power supplies for PMBus-compliant health reporting. IC Role / Device Role / Timing Role: Dual-path output feeds ADC inputs for simultaneous voltage/current sampling; rail-to-rail OUTV maximizes SNR. Use Value: Delivers <0.15% gain error and <500µV offset for accurate power calculation (P = V × I) across temperature, satisfying ENERGY STAR® efficiency validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current and voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40086ATA+T | Single-path 0–60V voltage monitor only; no integrated current sense amplifier; requires external shunt amplifier. | Limited to voltage-only monitoring; cannot replace dual-path functionality of LTC6115HMS#PBF in current+ voltage applications. | Select only if voltage sensing alone suffices and board space allows separate current sense IC. |
| INA226AIDGST | I²C-output digital current/voltage sensor; 0–36V common-mode; 16-bit ADC; no analog output or 100V capability. | Requires microcontroller interface; lacks analog rail-to-rail outputs for direct comparator or analog control loops. | Choose when digital telemetry and SMBus integration are prioritized over analog speed and high-voltage range. |
Compared with MAX40086ATA+T and INA226AIDGST, the LTC6115HMS#PBF uniquely provides simultaneous analog current and voltage outputs with 100V capability and 1µs response - making it irreplaceable in analog safety-critical loops requiring deterministic timing and wide common-mode range.
Availability
LTC6115HMS#PBF is available at Aetrix Electronics and suitable for automotive battery management, industrial power supply telemetry, and server PSU health monitoring requiring stable component supply across extended temperature ranges.
Supply support for LTC6115HMS#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6115HMS#PBF belongs to Analog Devices' precision current and voltage sensing product line, designed specifically for high-reliability, high-voltage monitoring in automotive and industrial power systems where accuracy, speed, and temperature robustness are critical.
FAQ
What is the maximum common-mode voltage the LTC6115HMS#PBF can measure on the VIN pin?
The LTC6115HMS#PBF supports a VIN input voltage range of 0V to 100V, enabled by its internal precision 1MΩ resistor divider. This allows direct connection to 100V rails without external attenuation, with guaranteed ±0.15% total gain error across the full range and operating temperature.
Does the LTC6115HMS#PBF require separate power supplies for current and voltage sensing functions?
Yes, the LTC6115HMS#PBF requires two independent supplies: V+ (5V–100V) powers the current sense amplifier, while VS (2.7V–5.5V) powers the voltage sense amplifier and internal resistor divider. This separation prevents cross-talk and maintains PSRR >95dB on the voltage path.
Can the LTC6115HMS#PBF operate in automotive under-hood environments?
Yes, the LTC6115HMS#PBF is AEC-Q100 qualified for Grade H (–40°C to +125°C) and specified for full performance across this range. Its 125°C junction rating, 135°C/W θJA, and robust PSRR make it suitable for engine compartment and transmission control module applications.
How is gain configured for the current sense path of the LTC6115HMS#PBF?
Current sense gain is set by two external resistors: RIN between –IN and V+, and ROUT from OUTI to GND. The transconductance is 1/RIN, so VOUTI = (VSENSE/RIN) × ROUT. Common configurations include RIN = 100Ω / ROUT = 10kΩ for gain = 100.
What is the purpose of the FB pin on the LTC6115HMS#PBF?
The FB pin is the inverting input of the voltage sense amplifier (A2). It accepts an external resistor network to configure gain and reference point for OUTV, enabling full-scale output adjustment (e.g., 1V to 5V) to match downstream ADC or comparator input ranges without signal conditioning.
LTC6115HMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.06V/µs
- Gain Bandwidth Product:
- 530 kHz
- -3db Bandwidth:
- 200 kHz
- Current - Input Bias:
- 85 nA
- Voltage - Input Offset:
- 85 µV
- Current - Supply:
- 400µA (x2 Channels)
- Current - Output / Channel:
- 27 mA
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP
LTC6115HMS#PBF FAQ
1.How can I place an order for LTC6115HMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6115HMS#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 LTC6115HMS#PBF reliable?
The price and inventory of LTC6115HMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6115HMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC6115HMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6115HMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6115HMS#PBF?
LTC6115HMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6115HMS#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 LTC6115HMS#PBF?
For technical support, including LTC6115HMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6115HMS#PBF requirements.
6.How does Aetrix verify that LTC6115HMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6115HMS#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 LTC6115HMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC6115HMS#PBF?
All LTC6115HMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6115HMS#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 LTC6115HMS#PBF part is unused and in its original packaging.
Return procedure for LTC6115HMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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