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Analog Devices Inc. LTC2992CMS#PBF
- Part No.:
- LTC2992CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2992CMS#PBF.pdf
- Description:
- IC PWR MONITOR DUAL WIDE 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:160
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Product details
Overview
LTC2992CMS#PBF from Analog Devices is a dual-rail, wide-range power monitor IC that measures current, voltage, and power across two independent 0V–100V supplies. It integrates three 8-/12-bit ΔΣ ADCs, supports high-side/low-side current sensing via external shunts, delivers ±0.3% total unadjusted error in 12-bit mode, and reports data over I²C. It is used in telecom rectifier monitoring, industrial PLC power supervision, and server rack PSU telemetry.
For engineers reviewing the LTC2992CMS#PBF datasheet, LTC2992CMS#PBF pinout, LTC2992CMS#PBF application, or LTC2992CMS#PBF equivalent, key selection criteria include its 0V–100V rail-to-rail input range, dual-supply power summation capability, programmable alert thresholds, split SDAI/SDAO pins for opto-isolated I²C, and MSOP-16 package compatibility with space-constrained board layouts.
Technical Context
The LTC2992CMS#PBF implements a triple ΔΣ ADC architecture: two dedicated current-sense ADCs (IADC1/IADC2) digitize differential shunt voltages up to 51.2 mV full-scale, while the third voltage ADC (VADC) sequentially samples up to six inputs-including SENSE1+, SENSE2+, and four GPIOs-with 102.4 V or 2.048 V full-scale ranges. All ADCs support 8-bit (3.9 ms conversion) or 12-bit (62.4 ms) operation.
Its flexible power architecture allows direct operation from 2.7V–100V supply (VDD), internal 5V LDO regulation (INTVCC), or external shunt regulation at 6.2V-enabling use in floating, high-voltage, or isolated systems. The I²C interface features separate SDAI (input) and SDAO (output) pins, supporting standard or opto-isolated bus topologies without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0V to 100V per supply-supports direct monitoring of telecom -48V, industrial 24V/48V, and automotive 12V/24V rails without external dividers. |
| Current Sensing | Dual independent channels with 51.2 mV full-scale differential input-enables accurate measurement using low-value shunts (e.g., 0.01 Ω) for ≤10 A full-scale. |
| ADC Resolution | Configurable 8-bit or 12-bit-12-bit mode delivers ±0.3% TUE for precision power calculation; 8-bit mode reduces conversion time to 3.9 ms. |
| I²C Interface | Split SDAI/SDAO pins-allows direct connection to opto-isolators without external logic inversion or level translation. |
| Power Supply Range | VDD = 2.7V to 100V; INTVCC = 2.7V to 5.8V-supports single-supply operation from battery, DC-DC output, or rectified AC lines. |
| Alert & Status | Programmable overrange thresholds + ALERT (GPIO4) and DATAREADY (GPIO3) open-drain outputs-enables autonomous fault detection and host-triggered read timing. |
| Package | 16-lead MSOP (3mm × 4.9mm)-compatible with automated assembly and provides thermal performance (θJA = 120°C/W) suitable for industrial ambient conditions. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm), exposed pad optional for thermal enhancement. Operating junction temperature range: 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1+, SENSE2+ | Supply voltage & current sense input | High-impedance analog inputs for rail voltage monitoring (0V–100V FS) and Kelvin-connected shunt top nodes. |
| SENSE1–, SENSE2– | Current sense differential input | Accepts shunt resistor bottom node; differential input range ±1V, 51.2 mV FS for current measurement. |
| VDD | Main high-voltage supply input | Powers internal LDO (INTVCC) when ≥8V; supports direct connection to 3V–100V system rails. |
| INTVCC | Internal low-voltage supply | Output of internal 5V LDO (or shunt regulator); powers core logic and can source ≤10 mA to external circuitry. |
| SCL, SDAI, SDAO | I²C clock & bidirectional data | Separate input (SDAI) and output (SDAO) pins enable opto-isolation without external inverters or level shifters. |
| GPIO1–GPIO4 | Configurable I/O terminals | Open-drain pins usable as ADC inputs (up to 2.048 V FS), DATAREADY (GPIO3), or SMBus ALERT (GPIO4). |
| ADR0, ADR1 | I²C address configuration | Three-state inputs (INTVCC/GND/open) set one of nine unique I²C addresses-enables multi-device bus sharing. |
| GND | Device ground reference | Analog/digital common return; exposed pad may be connected to PCB ground plane for improved thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent power monitoring | Simultaneously computes real-time current, voltage, and power for two supplies-and sums them into total system consumption (ITOTAL, PTOTAL). |
| On-chip min/max storage | Automatically records minimum and maximum values for all measured parameters-eliminates need for continuous host polling or firmware logging. |
| Programmable alert thresholds | Per-channel overvoltage, undervoltage, overcurrent, and power limit triggers-configurable via I²C registers to reduce host interrupt load. |
| Flexible power architecture | Operates from VDD (2.7V–100V), external INTVCC (2.7V–5.8V), or shunt-regulated INTVCC (6.2V)-supports floating, high-side, or isolated sensing topologies. |
| Continuous scan & snapshot modes | Continuous round-robin sampling (10 Hz per input) or on-demand single/dual-channel conversion-optimizes update rate vs. latency trade-off. |
Applications
| Telecom Rectifier Monitoring | Industrial PLC Power Supervision |
|---|---|
Use Scenario: Real-time monitoring of -48V DC distribution panels in central office equipment, detecting brownouts, overloads, and fuse failures. IC Role / Device Role / Timing Role: Dual-channel voltage/current/power monitor with rail-to-rail 0V–100V input range and programmable alerts-acts as primary telemetry sensor for upstream BMS. Use Value: Enables predictive maintenance by logging min/max voltage/current excursions and triggering SNMP traps via ALERT pin upon threshold violation. | Use Scenario: Supervising redundant 24V DC power feeds to programmable logic controllers in factory automation cabinets. IC Role / Device Role / Timing Role: High-accuracy dual-supply monitor with 12-bit ADCs and 0.3% TUE-provides calibrated power data for redundancy arbitration and load balancing. Use Value: Eliminates need for external signal conditioning or microcontroller-based averaging-reduces BOM count and firmware complexity in safety-critical control systems. |
| Server Rack PSU Telemetry | Automotive 12V/48V Dual-Battery Systems |
Use Scenario: Measuring input/output power, efficiency, and thermal derating of hot-swappable AC/DC PSUs in hyperscale data center racks. IC Role / Device Role / Timing Role: Dual-rail power monitor with I²C interface and DATAREADY handshake-synchronizes host reads with completed conversions to prevent stale data reads. Use Value: Delivers precise power summation (PTOTAL) and min/max tracking-supports dynamic power capping and energy accounting per PSU slot. | Use Scenario: Monitoring charge/discharge current and voltage across both 12V starter and 48V mild-hybrid batteries in next-gen vehicles. IC Role / Device Role / Timing Role: Wide-input-range (0V–100V), high-common-mode monitor with isolated I²C support-enables safe sensing in high-noise automotive environments. Use Value: Provides simultaneous, time-aligned measurements of both battery rails-critical for state-of-charge estimation and regenerative braking energy reconciliation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA226AIDGST | Single-channel, 0V–36V max common-mode; no integrated voltage ADC or power calculation engine. | Requires external MCU for voltage sensing, multiplication, and min/max logging-increases firmware overhead and component count. | Select when only one supply needs monitoring and cost-per-channel is prioritized over integration. |
| LTC2946IMS#PBF | Dual-channel like LTC2992CMS#PBF but uses SPI interface; lacks split SDAI/SDAO for opto-isolation; no GPIO-configurable ADC inputs. | Better suited for non-isolated, SPI-based systems where GPIO flexibility and I²C isolation are not required. | Select when SPI is preferred and opto-isolation or auxiliary voltage monitoring is unnecessary. |
Compared with INA226AIDGST and LTC2946IMS#PBF, the LTC2992CMS#PBF uniquely combines dual 0V–100V rail monitoring, on-chip power computation, min/max storage, and opto-isolation-ready I²C-reducing system-level design effort and enabling compact, high-voltage telemetry in telecom, industrial, and automotive applications.
Availability
LTC2992CMS#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and server rack power management requiring stable component supply, long-term lifecycle assurance, and C-grade temperature compliance (0°C to 70°C).
Supply support for LTC2992CMS#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2992 product line delivers highly integrated, wide-range power monitoring solutions targeting high-reliability systems where precision, isolation readiness, and minimal external components are critical-such as telecom rectifiers, industrial power supplies, and automotive battery management.
FAQ
What is the maximum common-mode voltage supported by LTC2992CMS#PBF for current sensing?
The LTC2992CMS#PBF supports a 0V to 100V input common-mode range on SENSE1+ and SENSE2+. For current sensing, the differential voltage across the shunt (SENSE+ to SENSE−) is limited to ±1V, with a full-scale range of ±51.2 mV. This enables accurate high-side or low-side current measurement across the entire 0V–100V rail range without external level-shifting circuitry. The LTC2992CMS#PBF maintains this specification across its full operating temperature range (0°C to 70°C).
Does LTC2992CMS#PBF require external calibration for accurate power measurement?
No, the LTC2992CMS#PBF performs automatic offset calibration of its current-sense amplifiers on every conversion by default-eliminating the need for manual calibration or factory-trimmed coefficients. Its 12-bit ADCs deliver ±0.3% total unadjusted error (TUE) over temperature, and onboard digital multiplication ensures consistent scaling between current and voltage measurements for accurate power calculation. The LTC2992CMS#PBF stores min/max values and supports programmable alert thresholds-all without host intervention.
Can LTC2992CMS#PBF operate from a 3.3V supply?
Yes, the LTC2992CMS#PBF supports an input supply range of 2.7V to 100V on the VDD pin. When powered from 3.3V, it operates in low-voltage mode-drawing <1.6 mA quiescent current-and uses the 3.3V rail directly to power internal circuitry. The INTVCC pin must be tied to VDD in this configuration. The LTC2992CMS#PBF retains full functionality including dual-supply monitoring, I²C communication, and alert generation at 3.3V, making it suitable for low-voltage embedded systems.
How does the split SDAI/SDAO interface of LTC2992CMS#PBF simplify opto-isolation?
The LTC2992CMS#PBF separates I²C data into SDAI (input-only) and SDAO (output-only) pins-allowing each signal path to be independently isolated using a single optocoupler per direction. This eliminates the need for bidirectional isolators or external logic to manage direction control, reducing component count, board area, and signal integrity risk. In contrast, standard I²C requires complex isolation schemes due to shared bidirectional SDA. The LTC2992CMS#PBF's architecture enables robust, low-latency isolated telemetry in high-noise environments such as industrial motor drives or telecom power shelves.
What GPIO functions are available on LTC2992CMS#PBF, and how are they configured?
The LTC2992CMS#PBF provides four open-drain GPIO pins (GPIO1–GPIO4), configurable via I²C registers as general-purpose inputs, outputs, ADC inputs (for auxiliary voltage monitoring up to 2.048 V FS), DATAREADY (GPIO3), or SMBus ALERT (GPIO4). Configuration is performed through dedicated control bits in the CONFIG register. Unused GPIOs should be tied to GND. The LTC2992CMS#PBF datasheet defines all valid configurations in Table 18, ensuring deterministic behavior without external pull-ups or level translators.
LTC2992CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Telecommunications
- Voltage - Input:
- 0V ~ 100V
- Voltage - Supply:
- 3V ~ 100V
- Current - Supply:
- 1.6 mA
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP
LTC2992CMS#PBF FAQ
1.How can I place an order for LTC2992CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2992CMS#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 LTC2992CMS#PBF reliable?
The price and inventory of LTC2992CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2992CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2992CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2992CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2992CMS#PBF?
LTC2992CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2992CMS#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 LTC2992CMS#PBF?
For technical support, including LTC2992CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2992CMS#PBF requirements.
6.How does Aetrix verify that LTC2992CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2992CMS#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 LTC2992CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2992CMS#PBF?
All LTC2992CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2992CMS#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 LTC2992CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2992CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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