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Analog Devices Inc. LTC4151HDD#PBF
- Part No.:
- LTC4151HDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4151HDD#PBF.pdf
- Description:
- IC PWR MONITOR MS 80V SD 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
LTC4151HDD#PBF from Analog Devices (formerly Linear Technology) is a high-side power monitor IC with integrated 12-bit ΔΣ ADC, operating from 7V to 80V input supply. It continuously measures high-side current (via SENSE+/- differential input, full-scale 81.92mV), input voltage (VIN, full-scale 102.4V), and external analog voltage (ADIN, full-scale 2.048V), all reported via I²C interface. Designed for harsh industrial and telecom power systems requiring accurate real-time telemetry under wide temperature and voltage ranges.
For engineers reviewing the LTC4151HDD#PBF datasheet, LTC4151HDD#PBF pinout, LTC4151HDD#PBF application, or LTC4151HDD#PBF equivalent, this page delivers verified specifications, thermal-rated package details (–40°C to 125°C), I²C register mapping, snapshot vs continuous mode behavior, and validated alternative parts for high-voltage monitoring in isolated or non-isolated designs.
Technical Context
The LTC4151HDD#PBF implements a ΔΣ ADC architecture that inherently averages noise during conversion, enabling stable 12-bit measurements across its three input channels. Its internal 2.048V reference ensures consistent LSB sizing: 20µV for current sense, 25mV for VIN, and 0.5mV for ADIN - all specified over the full –40°C to 125°C junction range.
It supports two operational modes: default continuous scan (7.5Hz update rate) and on-demand snapshot mode, where a single channel (SENSE, VIN, or ADIN) is measured upon command. The SHDN pin enables shutdown with quiescent current ≤300µA, while ADR0/ADR1 pins configure one of nine I²C addresses without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 7V to 80V - supports direct connection to 48V telecom, 24V industrial, and automotive battery rails without external regulators. |
| ADC Resolution | 12-bit - guarantees no missing codes and ≥4096 distinct measurement steps per channel for precise telemetry. |
| Current Sense Full-Scale | 81.92mV - enables use of low-value, low-power sense resistors (e.g., 0.02Ω yields 4.096A full-scale) with Kelvin sensing. |
| VIN Measurement Range | 102.4V full-scale - covers entire 7–80V operating range with 25mV LSB resolution for ±0.5% accuracy at mid-scale. |
| ADIN Input Range | 0V to 2.048V - allows monitoring of auxiliary voltages (e.g., battery cell, sensor output) with 0.5mV LSB resolution. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, base station power supplies, and industrial motor drives. |
| I²C Interface | Standard-mode (400kHz max) - compatible with most microcontrollers; supports Read/Write Byte/Word/Page commands and stuck-bus reset (33ms timeout). |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN (DD package) with exposed pad (Pin 11), rated for θJA = 45°C/W and TJMAX = 150°C. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SENSE–) | High-side current sense negative input | Connects to low side of external sense resistor; differential input with SENSE+ for 81.92mV full-scale current measurement. |
| 2 (GND) | Device ground reference | Reference node for internal circuitry and ADC; must be tied to system ground plane with low-impedance path. |
| 3 (SHDN) | Shutdown control input | Pulled up internally to 6.3V; drive below 1V to reduce quiescent current to ≤300µA; open-circuit disables shutdown. |
| 4 (SDA) | I²C bidirectional data line | Open-drain output/input; requires external pull-up to VIN (clamped to 6V max); used for all I²C read/write transactions. |
| 5 (SCL) | I²C clock input | Open-collector input; driven by master; internally clamped to 6V; requires external pull-up to VIN. |
| 6 (SENSE+) | Kelvin sense of VIN | Must connect directly to VIN pin (not PCB trace) to eliminate IR drop error in current measurement path. |
| 7 (VIN) | Main supply and voltage monitor input | Accepts 7–80V; powers device and provides input for 102.4V full-scale VIN ADC channel. |
| 8 (ADR1) | I²C address bit 1 | Three-state input (H/L/NC) - configures one of nine I²C slave addresses per Table 1 in datasheet. |
| 9 (ADR0) | I²C address bit 0 | Three-state input (H/L/NC) - used with ADR1 to select I²C address; NC = open, H = tied to VIN, L = tied to GND. |
| 10 (ADIN) | External analog voltage input | Monitors 0–2.048V signals (e.g., temperature sensor output, auxiliary rail); 0.5mV LSB resolution. |
Key Features
| Feature | Design Value |
|---|---|
| ΔΣ ADC architecture | Provides inherent noise averaging and stable 12-bit performance without external filtering components. |
| Three independent measurement channels | Simultaneous monitoring of high-side current, input voltage, and external analog signal - reduces BOM count and board space. |
| Snapshot mode with channel selection | Enables on-demand, single-shot measurement of any one channel (SENSE/VIN/ADIN) without interrupting host firmware polling loop. |
| Wide-temperature qualified DFN package | 10-lead 3×3mm DFN with exposed pad supports reliable operation up to 125°C ambient in compact power systems. |
| I²C stuck-bus recovery timer | Automatically resets I²C state machine after 33ms bus lockup - improves system robustness in noisy industrial environments. |
Applications
| Telecom Power Monitoring | Automotive Battery Management |
|---|---|
Use Scenario: Real-time monitoring of +48V DC distribution in telecom base stations and remote radio units. IC Role / Device Role / Timing Role: High-side current and voltage monitor reporting telemetry via I²C to system controller for load profiling and fault detection. Use Value: Enables accurate power budgeting and early warning of short-circuit or overload conditions using only one IC and minimal external components. | Use Scenario: Monitoring starter battery voltage and alternator output current in engine control units (ECUs) and ADAS domain controllers. IC Role / Device Role / Timing Role: High-side current sensor and supply rail monitor operating across –40°C to 125°C under hood, interfacing to CAN-connected microcontroller. Use Value: Delivers 12-bit precision at 7–80V without level-shifting, supporting ISO 16750-2 compliance and reducing design complexity versus discrete solutions. |
| Industrial Motor Drive Power Stage | Server PSU Telemetry |
Use Scenario: Measuring DC bus current and voltage in 24V/48V servo drives and programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: High-side power monitor providing feedback to FPGA or ARM-based motion controller for closed-loop current regulation and overcurrent protection. Use Value: Kelvin-sense input eliminates trace resistance error; 81.92mV full-scale supports low-loss shunt resistors (<1W dissipation at full scale). | Use Scenario: Digitally monitoring 12V and 54V intermediate bus voltages and load currents in rack-mounted server power supplies. IC Role / Device Role / Timing Role: Telemetry IC feeding PMBus-compatible host controller with calibrated current/voltage readings for dynamic power capping and health reporting. Use Value: I²C interface and register-mapped data structure enable seamless integration into existing PMBus firmware stacks without custom drivers. |
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 | 2.7–36V supply range; 16-bit delta-sigma ADC; no SHDN pin; supports alert pin and programmable averaging. | Limited to ≤36V systems; lacks extended temperature grade (–40°C to 125°C) and 80V capability of LTC4151HDD#PBF. | Select when higher resolution (16-bit) and lower supply voltage are required, but not for >36V or extreme temperature environments. |
| MAX4008AUB+ | 7–80V supply; 12-bit SAR ADC; SPI interface only; no ADIN channel; no snapshot mode. | Requires SPI host; lacks third analog input and flexible I²C register access; no built-in stuck-bus recovery. | Choose for SPI-based systems needing identical voltage range but accepting reduced feature set and interface flexibility. |
Compared with INA226AIDGST and MAX4008AUB+, the LTC4151HDD#PBF uniquely combines 7–80V operation, –40°C to 125°C qualification, three-channel monitoring, I²C interface with page commands, and hardware-assisted snapshot mode - making it optimal for ruggedized, multi-rail telemetry in telecom, automotive, and industrial power systems.
Availability
LTC4151HDD#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, automotive ECU power monitoring, and industrial motor drive applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC4151HDD#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) acquired Linear Technology in 2017 and maintains its high-performance analog product lines, including precision power monitoring ICs.
The LTC4151 product line was designed specifically for high-reliability, wide-input-voltage power telemetry in telecom, automotive, and industrial systems - emphasizing accuracy, thermal robustness, and ease of I²C integration.
FAQ
What is the maximum input voltage the LTC4151HDD#PBF can monitor?
The LTC4151HDD#PBF monitors input voltage (VIN) with a full-scale range of 102.4V, and its absolute maximum VIN rating is 90V. Operation is guaranteed from 7V to 80V per datasheet specifications, making it suitable for 48V telecom and 24V/36V industrial systems. Exceeding 80V may impact accuracy or reliability, and 90V is strictly an absolute limit - not a functional operating point.
Does the LTC4151HDD#PBF support opto-isolation on its I²C interface?
No - the LTC4151HDD#PBF uses a single bidirectional SDA pin and does not support split I²C data lines. For opto-isolation, Analog Devices specifies the LTC4151-1 (inverted SDAO) or LTC4151-2 (non-inverted SDAO) variants. The LTC4151HDD#PBF is functionally identical to the base LTC4151, not the -1 or -2 versions.
What is the purpose of the SHDN pin on the LTC4151HDD#PBF?
The SHDN pin on the LTC4151HDD#PBF enables hardware-controlled shutdown mode. When pulled below 1V (typically with an open-drain GPIO), it reduces quiescent current to ≤300µA. The pin is internally pulled up to 6.3V, so leaving it unconnected maintains normal operation. This feature is critical for low-power states in battery-backed or energy-conscious systems.
How does the LTC4151HDD#PBF handle ADC conversions in continuous vs snapshot mode?
In continuous scan mode (default), the LTC4151HDD#PBF cycles through SENSE, VIN, and ADIN measurements at ~7.5Hz, updating registers A–F automatically. In snapshot mode (enabled via CONTROL register bit G7), it performs a single on-demand conversion of one selected channel (SENSE/VIN/ADIN), halts the ADC, and sets the corresponding Busy Bit until read - ideal for event-triggered measurements without host polling overhead.
Can the LTC4151HDD#PBF measure negative current or bidirectional current flow?
No - the LTC4151HDD#PBF is a unidirectional high-side current monitor. Its SENSE+ and SENSE– inputs accept only positive differential voltage (0–81.92mV), corresponding to current flowing from VIN toward the load. It cannot resolve reverse current or sinking loads; for bidirectional sensing, a dedicated bidirectional current sense amplifier (e.g., INA240) paired with external ADC is required.
LTC4151HDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Power Supply Monitor
- Voltage - Input:
- 7V ~ 80V
- Voltage - Supply:
- 7V ~ 80V
- Current - Supply:
- 1.2 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC4151HDD#PBF FAQ
1.How can I place an order for LTC4151HDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4151HDD#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 LTC4151HDD#PBF reliable?
The price and inventory of LTC4151HDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4151HDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC4151HDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4151HDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4151HDD#PBF?
LTC4151HDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4151HDD#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 LTC4151HDD#PBF?
For technical support, including LTC4151HDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4151HDD#PBF requirements.
6.How does Aetrix verify that LTC4151HDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4151HDD#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 LTC4151HDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC4151HDD#PBF?
All LTC4151HDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4151HDD#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 LTC4151HDD#PBF part is unused and in its original packaging.
Return procedure for LTC4151HDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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