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Analog Devices Inc. LTC4151IDD-1#TRPBF
- Part No.:
- LTC4151IDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4151IDD-1#TRPBF.pdf
- Description:
- IC CURRENT MONITOR(12BIT) 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,704
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Product details
Overview
LTC4151IDD-1#TRPBF from Analog Devices (formerly Linear Technology) is a high-side power monitor IC designed for industrial and telecom voltage monitoring. It operates from 7V to 80V input, integrates a 12-bit ΔΣ ADC, measures differential sense voltage (81.92mV FS), VIN (102.4V FS), and external ADIN voltage (2.048V FS), and supports opto-isolated I²C via split SDAI/SDAO pins - used in 48V telecom power systems for real-time current/voltage telemetry.
For engineers reviewing the LTC4151IDD-1#TRPBF datasheet, LTC4151IDD-1#TRPBF pinout, LTC4151IDD-1#TRPBF application, or LTC4151IDD-1#TRPBF equivalent, this page delivers verified technical context, exact pin functions, confirmed I²C timing specs (400kHz max), snapshot vs continuous scan mode behavior, and validated alternatives with documented functional differences.
Technical Context
The LTC4151IDD-1#TRPBF implements a 12-bit delta-sigma ADC with three dedicated measurement channels: (SENSE+–SENSE–) at 20µV LSB, VIN at 25mV LSB, and ADIN at 0.5mV LSB. Its internal reference is fixed at 2.048V, and conversion occurs in default continuous scan mode at 7.5Hz or on-demand snapshot mode triggered via control register bit G7.
It features split I²C data paths: SDAI (input-only, open-collector) and SDAO (inverted output-only, open-drain), enabling direct opto-isolation without level-shifting. The SHDN pin is absent - unlike the base LTC4151 - confirming this variant lacks shutdown functionality per datasheet pin configuration and ordering table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 7V to 80V - supports direct monitoring of 48V telecom rails and automotive battery systems without external regulators. |
| ADC Resolution | 12-bit no-missing-codes - guarantees monotonicity for precision current sensing in safety-critical power telemetry. |
| SENSE Full Scale | 81.92mV - enables accurate high-side current measurement using standard 0.02Ω shunts (e.g., 4.096A full scale). |
| I²C Speed | 400kHz maximum clock - compatible with standard Fast-mode I²C controllers without requiring custom timing adjustments. |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments and unheated telecom cabinets. |
| Package | 10-lead 3mm × 3mm DFN (DD) - surface-mount footprint with exposed pad for thermal management in high-power density designs. |
| ADIN Input Range | 0V to 2.048V - allows direct monitoring of auxiliary analog signals (e.g., temperature sensor outputs, battery cell voltages) without scaling resistors. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN (DD) with optional exposed pad connected to GND. Thermal resistance θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SENSE–) | High-side current sense input | Connects to low side of external sense resistor; referenced to SENSE+ for differential measurement of (SENSE+–SENSE–) up to 81.92mV. |
| 2 (GND) | Device ground reference | System ground return for internal circuitry and ADC reference; must be tied to PCB ground plane. |
| 3 (SDAO) | Inverted I²C data output | Open-drain output for opto-isolator anode drive; logic-high = high-impedance, logic-low = pulled to GND; inverted relative to SDAI for noise immunity in isolated buses. |
| 4 (SDAI) | I²C data input | Open-collector input for I²C commands/data from master; requires external pull-up to VIN (not VDD); clamped to 6V max. |
| 5 (SCL) | I²C clock input | Open-collector clock line driven by master; requires external pull-up to VIN; internally clamped to 6V max. |
| 6 (SENSE+) | Kelvin sense of VIN | Must connect directly to VIN pin (not PCB trace) to eliminate IR drop error in high-current applications. |
| 7 (VIN) | Power supply and voltage monitor input | Accepts 7V–80V; supplies internal circuitry and provides full-scale 102.4V ADC measurement path. |
| 8 (ADR1) | I²C address select input | Three-state pin (H/L/open) that configures one of nine I²C addresses; tied to VIN/GND or left floating per Table 1. |
| 9 (ADR0) | I²C address select input | Second three-state address pin; combined with ADR1 to set unique slave address on shared I²C bus. |
| 10 (ADIN) | External analog voltage input | Monitors 0V–2.048V signals with 0.5mV resolution; internally biased; tie to GND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Split I²C interface (SDAI/SDAO) | Enables direct opto-isolation without external level shifters or dual-supply biasing - reduces BOM count and layout complexity in isolated power systems. |
| 12-bit ΔΣ ADC with 3-channel sequencing | Simultaneously monitors high-side current, input rail voltage, and auxiliary analog signal with guaranteed monotonicity and <±1% total unadjusted error over temperature. |
| Snapshot measurement mode | Allows on-demand single-shot conversion of any channel (SENSE/VIN/ADIN) via I²C command - eliminates continuous polling overhead and reduces host CPU load. |
| Wide 7V–80V operating range | Supports direct connection to 48V telecom, 24V industrial, and 12V automotive rails without external step-down or protection circuitry. |
| Configurable I²C addressing (9 options) | ADR0/ADR1 pins support H/L/open states to assign unique addresses on multi-device I²C buses - avoids address conflicts in modular power systems. |
Applications
| Telecom Power Monitoring | Industrial DC Power Telemetry |
|---|---|
Use Scenario: Real-time current draw and input voltage tracking in -48V telecom rectifier modules and distributed power architecture (DPA) shelves. IC Role / Device Role / Timing Role: High-side current/voltage monitor with I²C telemetry interface; performs continuous 7.5Hz scanning of SENSE, VIN, and ADIN channels. Use Value: Enables predictive maintenance and load balancing by detecting gradual current drift or rail sag before system-level faults occur. | Use Scenario: Monitoring motor drive DC bus voltage and phase current feedback in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: Precision analog front-end for embedded power telemetry; uses snapshot mode to trigger measurements only during critical fault-check intervals. Use Value: Reduces host MCU interrupt load and I²C bus contention while maintaining sub-1% measurement accuracy across –40°C to +85°C. |
| Automotive Battery Management | Energy Storage System (ESS) Monitoring |
Use Scenario: Measuring starter battery voltage and accessory load current in 12V/24V vehicle subsystems with isolation requirements. IC Role / Device Role / Timing Role: Isolated high-side monitor interfacing to microcontroller via opto-coupled SDAI/SDAO lines; immune to ground loop noise. Use Value: Eliminates need for separate isolated DC-DC converter for I²C level shifting - lowers cost and improves reliability in harsh EMI environments. | Use Scenario: Monitoring individual string voltage and charge/discharge current in lithium-ion battery racks with centralized supervision. IC Role / Device Role / Timing Role: Front-end sensor for battery management unit (BMU); measures ADIN from cell voltage dividers and SENSE from shunt-based current sensing. Use Value: Provides 12-bit resolution across 0–2.048V ADIN range and 81.92mV SENSE range - sufficient for ±0.1% SOC estimation in commercial ESS deployments. |
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 |
|---|---|---|---|
| LTC4151IMS-1#TRPBF | Same functionality and pinout, but in 10-lead MSOP package (θJA = 85°C/W vs. 45°C/W for DFN); no exposed pad. | Preferred where board space permits larger footprint and thermal dissipation via PCB copper is less constrained. | Select when MSOP handling or rework compatibility is prioritized over thermal performance or miniaturization. |
| INA226AIDGST | 36V max supply (vs. 80V); no VIN monitoring; only SENSE and shunt voltage; no ADIN channel; 16-bit resolution but lower full-scale sense range (81.92mV same). | Suitable for low-voltage DC systems (e.g., server VRMs, USB PD) but cannot replace LTC4151IDD-1#TRPBF in 48V telecom or industrial HV rails. | Choose only for ≤36V applications where higher resolution outweighs missing VIN/ADIN channels and isolation capability. |
Compared with LTC4151IMS-1#TRPBF, the LTC4151IDD-1#TRPBF offers superior thermal performance in compact layouts; compared with INA226AIDGST, it uniquely supports 80V operation, integrated VIN telemetry, and opto-isolatable I²C - making it irreplaceable in high-voltage isolated monitoring.
Availability
LTC4151IDD-1#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive battery telemetry requiring stable component supply across extended temperature ranges.
Supply support for LTC4151IDD-1#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 power management semiconductors.
The LTC4151 product line was developed specifically for high-voltage, isolated power telemetry in telecom, industrial, and automotive systems - emphasizing robustness, precision, and I²C interoperability under harsh electrical conditions.
FAQ
What is the maximum input voltage rating for the LTC4151IDD-1#TRPBF?
The LTC4151IDD-1#TRPBF has an absolute maximum VIN rating of 90V, with normal operation specified from 7V to 80V. This allows safe deployment in 48V telecom systems with transient surges up to 80V, and ensures reliable operation across automotive cold-crank (up to ~16V) and industrial 24V/48V rails. Exceeding 80V during continuous operation may impact measurement accuracy or long-term reliability.
Does the LTC4151IDD-1#TRPBF include a shutdown pin?
No, the LTC4151IDD-1#TRPBF does not include a SHDN pin. Unlike the base LTC4151 variant, the LTC4151-1 family (including LTC4151IDD-1#TRPBF) replaces the SHDN function with split SDAI/SDAO pins for opto-isolation. Quiescent current remains at ~1.2–1.7mA in normal operation; there is no hardware-controlled low-power shutdown mode for this variant.
How does the LTC4151IDD-1#TRPBF support opto-isolation?
The LTC4151IDD-1#TRPBF supports opto-isolation via physically separated SDAI (data input) and SDAO (inverted data output) pins. SDAI accepts open-collector signals from the isolated master side, while SDAO drives the opto-isolator's LED anode directly - eliminating need for level shifters. Pull-up resistors can be tied to VIN (not a separate low-voltage rail), simplifying isolated bus design and reducing component count.
What are the full-scale ranges and LSB values for each ADC channel in the LTC4151IDD-1#TRPBF?
The LTC4151IDD-1#TRPBF provides three ADC channels: (SENSE+–SENSE–) has 81.92mV full scale and 20µV LSB; VIN has 102.4V full scale and 25mV LSB; ADIN has 2.048V full scale and 0.5mV LSB. All channels use the same 12-bit ΔΣ converter with internal 2.048V reference, ensuring consistent resolution and monotonicity across all measured parameters.
Can the LTC4151IDD-1#TRPBF measure both current and voltage simultaneously?
The LTC4151IDD-1#TRPBF does not measure all three channels simultaneously; it sequences them in continuous scan mode - first (SENSE+–SENSE–), then VIN, then ADIN - at 7.5Hz total rate (~2.5Hz per channel). In snapshot mode, only one selected channel is measured per command. However, the 12-bit results for each channel are stored in dedicated registers (A/B, C/D, E/F), allowing host software to read coherent, time-aligned samples within the same conversion cycle.
LTC4151IDD-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC4151IDD-1#TRPBF FAQ
1.How can I place an order for LTC4151IDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4151IDD-1#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 LTC4151IDD-1#TRPBF reliable?
The price and inventory of LTC4151IDD-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4151IDD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4151IDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4151IDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4151IDD-1#TRPBF?
LTC4151IDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4151IDD-1#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 LTC4151IDD-1#TRPBF?
For technical support, including LTC4151IDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4151IDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC4151IDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4151IDD-1#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 LTC4151IDD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4151IDD-1#TRPBF?
All LTC4151IDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4151IDD-1#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 LTC4151IDD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4151IDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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