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Analog Devices Inc. LTC6115HMS#WPBF
- Part No.:
- LTC6115HMS#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6115HMS#WPBF.pdf
- Description:
- IC CURR SENSE 2 CIRCUIT 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:502
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Product details
Overview
LTC6115HMS#WPBF from Analog Devices is a high-voltage, high-side current and voltage sense amplifier IC. It integrates dual sensing paths: a ±500µV max offset current sense amplifier (5V–100V supply range) and a precision voltage sense amplifier with 1MΩ internal divider (0V–100V input, ±0.15% total gain error). It delivers rail-to-rail output, 1µs response time, and AEC-Q100 qualification for automotive power monitoring.
For engineers reviewing the LTC6115HMS#WPBF datasheet, LTC6115HMS#WPBF pinout, LTC6115HMS#WPBF application, or LTC6115HMS#WPBF equivalent, key selection criteria include high-side current sensing up to 100V common-mode, independent dual-supply operation (V+ = 5–100V, VS = 2.7–5.5V), temperature-stable gain error, and automotive-grade reliability across –40°C to 125°C.
Technical Context
The LTC6115HMS#WPBF implements two independent signal chains: a transconductance-based current sense amplifier (A1) that forces –IN to +IN potential and sources 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+ for current path, VS for voltage path) and operate without shared ground constraints.
Its architecture enables simultaneous high-accuracy measurement of load current via external RSENSE and system bus voltage via VIN, with configurable gain (via RIN/ROUT), rail-to-rail OUTV output swing, and guaranteed performance over full –40°C to 125°C automotive temperature range. PSRR exceeds 118dB on V+ and 95dB on VS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Sense Supply Range | V+ = 5V to 100V - supports direct connection to high-voltage DC rails without level-shifting circuitry |
| Max Input Offset Voltage (Current Path) | ±500 µV - limits minimum resolvable shunt voltage to ~500 µV, enabling accurate low-current detection |
| Response Time | 1 µs - enables real-time overcurrent warning and fast shutdown control in power systems |
| Voltage Sense Input Range | 0V to 100V at VIN - accommodates telecom, industrial, and 48V/60V automotive battery monitoring |
| Total Gain Error (Voltage Path) | ±0.15% max - ensures <1.5 mV absolute error at 100V input, critical for precision regulation feedback |
| Operating Temperature Range | –40°C to 125°C - qualified per AEC-Q100 Grade H for under-hood and powertrain applications |
| Supply Current (Current Path) | 250 µA typical at V+ = 5V - minimizes burden on high-voltage supply while maintaining speed and accuracy |
Pinout & Package
Package: 12-lead MSOP (12-Lead Plastic MSOP, θJA = 135°C/W, TJMAX = 150°C), moisture sensitivity level MSL-1, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN (Pin 1) | Inverting input of current sense amplifier A1 | Driven to match +IN potential; Kelvin connection point for high-accuracy shunt sensing |
| +IN (Pin 12) | Noninverting input of current sense amplifier A1 | Connects to load side of sense resistor; defines high-side current measurement reference |
| V+ (Pin 11) | Positive supply for current sense circuit | Accepts 5V–100V input; powers A1 and sets common-mode range for current sensing |
| OUTI (Pin 3) | Current output of A1 | Sources IOUTI = VSENSE/RIN; requires external ROUT to generate voltage output |
| VIN (Pin 9) | Voltage sense input | Connects to high-voltage node (0–100V); feeds internal 1MΩ divider for scaled-down sensing |
| VS (Pin 7) | Positive supply for voltage sense amplifier A2 | 2.7V–5.5V logic-compatible supply; isolates low-voltage analog domain from high-V+ domain |
| OUTV (Pin 6) | Voltage sense amplifier output | Rail-to-rail output; configurable full-scale via external gain resistors for optimal ADC utilization |
| FB (Pin 5) | Inverting input of A2 | Used for closed-loop gain configuration; connects to external feedback network for precision scaling |
| GND (Pin 4) | Analog ground reference | Common return for both A1 and A2 circuits; must be low-impedance for noise immunity |
| NC (Pins 2, 8, 10) | No connect | Not internally bonded; leave unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent sensing paths | Enables concurrent high-side current and bus voltage monitoring without cross-talk or shared supply interference |
| Integrated 1MΩ voltage divider | Eliminates need for external high-voltage resistors; maintains ±0.15% gain accuracy across 0–100V input range |
| 1µs current sense response | Supports real-time fault detection and fast-acting protection schemes in power converters and motor drives |
| AEC-Q100 Grade H qualification | Validated for automotive applications including battery management, ADAS power rails, and engine control modules |
| Rail-to-rail OUTV output | Maximizes dynamic range when interfacing with 3.3V or 5V ADCs, reducing quantization error |
Applications
| Battery Management System (BMS) | Automotive Power Distribution Unit (PDU) |
|---|---|
Use Scenario: Monitoring cell stack voltage and pack discharge current in 48V mild-hybrid vehicle batteries. IC Role / Device Role / Timing Role: LTC6115HMS#WPBF simultaneously measures high-side current through shunt and total pack voltage at VIN, feeding data to MCU for state-of-charge and thermal derating. Use Value: ±0.15% voltage gain error and ±500µV current offset ensure <1% total energy calculation error over lifetime; AEC-Q100 rating guarantees reliability in under-hood environments. | Use Scenario: Real-time current and rail voltage supervision in centralized 12V/48V PDU modules controlling solenoids, pumps, and lighting loads. IC Role / Device Role / Timing Role: LTC6115HMS#WPBF provides fast (<1µs) overcurrent flag generation via OUTI and precise bus voltage feedback via OUTV for closed-loop regulation. Use Value: Dual-path independence allows simultaneous fault detection and telemetry without multiplexing delay; 125°C operation supports placement near high-power MOSFETs. |
| Industrial Telecom Power Supply | Server Rack Power Shelf Monitor |
Use Scenario: Monitoring output current and +54V/-48V bus voltage in redundant AC/DC front-end supplies for 5G base stations. IC Role / Device Role / Timing Role: LTC6115HMS#WPBF senses high-side current on isolated secondary side and monitors high-voltage DC bus, delivering analog outputs to isolation amplifiers or ADCs. Use Value: 100V VIN capability eliminates external attenuators; PSRR >118dB prevents switching noise from corrupting measurements in noisy SMPS environments. | Use Scenario: Per-rail current and voltage telemetry in multi-output 12V/5V/3.3V server power shelves for predictive maintenance and efficiency optimization. IC Role / Device Role / Timing Role: LTC6115HMS#WPBF replaces discrete op-amp + divider solutions on each rail, providing calibrated analog outputs directly compatible with PMBus ADC inputs. Use Value: Integrated 1MΩ divider and matched gain error reduce BOM count and calibration effort; 250µA V+ supply current minimizes loading on auxiliary rails. |
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 |
|---|---|---|---|
| INA226AIDGST | Single-chip I²C digital output; no integrated voltage divider; max common-mode 36V | Requires external voltage scaling for >36V rails; suited for digital telemetry, not analog loop closure | Select when digital interface and lower cost outweigh need for analog voltage sensing and >36V operation |
| MAX40056ATA+T | High-speed current-only amplifier (2.5µs); no voltage sense path; 80V max common-mode | Cannot monitor bus voltage; optimized for transient current capture in motor phase legs | Select when only ultrafast current sensing is required and voltage monitoring is handled separately |
Compared with INA226AIDGST and MAX40056ATA+T, the LTC6115HMS#WPBF uniquely combines analog high-voltage voltage sensing (0–100V) with high-speed current sensing (1µs) in one AEC-Q100-qualified package-enabling simplified, space-efficient, and robust dual-parameter monitoring where both signals are needed for safety-critical control.
Availability
LTC6115HMS#WPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial power distribution, and telecom power supply applications requiring stable component supply and long-term lifecycle support.
Supply support for LTC6115HMS#WPBF 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 LTC6115 product line was designed specifically for high-reliability, high-voltage dual-parameter monitoring in automotive and industrial power systems-emphasizing precision, speed, and extended temperature operation without external scaling components.
FAQ
What is the maximum input voltage the LTC6115HMS#WPBF can measure on the VIN pin?
The LTC6115HMS#WPBF supports a voltage sense input range of 0V to 100V on the VIN pin, enabled by its internal precision 1MΩ resistor divider with 40:1 attenuation. This allows direct connection to 48V, 60V, and telecom -48V/+54V rails without external resistive dividers. Absolute maximum rating is 105V, but specified performance is guaranteed only up to 100V per the datasheet's electrical characteristics table.
Does the LTC6115HMS#WPBF require separate power supplies for current and voltage sensing functions?
Yes, the LTC6115HMS#WPBF requires two independent supplies: V+ (5V to 100V) powers the current sense amplifier (A1), while VS (2.7V to 5.5V) powers the voltage sense amplifier (A2). This separation prevents noise coupling and enables operation where high-voltage current sensing and low-voltage analog processing coexist-critical for automotive and industrial systems with mixed-supply domains.
What is the guaranteed operating temperature range for the LTC6115HMS#WPBF?
The LTC6115HMS#WPBF is rated for operation from –40°C to 125°C and is AEC-Q100 qualified for automotive applications (Grade H). This specification is confirmed in the "ORDER INFORMATION" and "ABSOLUTE MAXIMUM RATINGS" sections of the datasheet, where the "H" suffix denotes the high-temperature grade, and the "W" suffix (as in #WPBF) indicates automotive-grade manufacturing control and reliability testing.
Can the LTC6115HMS#WPBF be used for bidirectional current sensing?
No, the LTC6115HMS#WPBF is designed for unidirectional high-side current sensing only. Its current sense amplifier architecture forces –IN to match +IN potential and sources current from OUTI proportional to VSENSE = ILOAD × RSENSE. It does not support negative shunt voltage polarity or reverse current detection. For bidirectional applications, a dedicated bidirectional current sense amplifier such as the LTC6102 or MAX4080 should be selected instead.
How is gain configured for the current sense path of the LTC6115HMS#WPBF?
Gain for the current sense path is set by two external resistors: RIN (between –IN and V+) determines transconductance (IOUTI = VSENSE / RIN), and ROUT (between OUTI and GND) converts output current to voltage (VOUTI = IOUTI × ROUT). The effective gain is VOUTI / VSENSE = ROUT / RIN. Table 1 in the datasheet lists standard configurations-for example, RIN = 100Ω and ROUT = 10kΩ yield a gain of 100, producing 5V output for 50mV shunt voltage.
LTC6115HMS#WPBF 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#WPBF FAQ
1.How can I place an order for LTC6115HMS#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6115HMS#WPBF 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#WPBF reliable?
The price and inventory of LTC6115HMS#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6115HMS#WPBF is usually 5 days.
3.What payment methods are accepted for LTC6115HMS#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6115HMS#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6115HMS#WPBF?
LTC6115HMS#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6115HMS#WPBF 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#WPBF?
For technical support, including LTC6115HMS#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6115HMS#WPBF requirements.
6.How does Aetrix verify that LTC6115HMS#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC6115HMS#WPBF 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#WPBF meets industry standards.
7.What is the process for return or replacement of LTC6115HMS#WPBF?
All LTC6115HMS#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6115HMS#WPBF, 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#WPBF part is unused and in its original packaging.
Return procedure for LTC6115HMS#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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