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Texas Instruments TMP512AIDR
- Part No.:
- TMP512AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Thermal Management
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP512AIDR.pdf
- Description:
- IC TEMP SNSR DUAL REMOTE 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
TMP512AIDR from Texas Instruments is a dual-channel temperature and power supply system monitor IC integrating local/remote temperature sensing, high-side current shunt monitoring, and bus voltage measurement. It delivers ±1°C remote diode accuracy, 12-bit ADC resolution, and SMBus-compatible two-wire interface - enabling real-time thermal and power telemetry in server VRM monitoring circuits.
For engineers reviewing the TMP512AIDR datasheet, TMP512AIDR pinout, TMP512AIDR application, or TMP512AIDR equivalent, key selection criteria include its dual remote sensor support (DXP1/DXN1 + DXP2/DXN2), programmable series resistance cancellation, ±1% full-scale current measurement accuracy over temperature, and operation from +3V to +26V supply.
Technical Context
The TMP512AIDR implements a dedicated 12-bit sigma-delta ADC with selectable PGA gains (÷1 to ÷8) for shunt voltage sensing and dual-range bus voltage scaling (0–16V or 0–32V). Its internal subregulator supports three configuration modes - including 3.3V-regulated die supply (Config 3) and direct V+ operation (Config 1/2) - enabling flexible input voltage range mapping without external LDOs.
Remote temperature measurement uses sequential current excitation across DXP/DXN pairs with n-factor correction (default 1.008) and automatic series resistance cancellation up to 3 kΩ. Local sensing employs an on-die diode with ±0.25°C accuracy over 15°C–85°C, while alert generation is configurable via SMBus Alert Mask Register for upper/lower watchdog limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Remote Temp Accuracy | ±1°C over –40°C to +125°C ambient; no calibration required for NPN/PNP transistors or diodes. |
| Local Temp Accuracy | ±0.25°C over 15°C–85°C; enables precise die-temperature feedback for thermal throttling. |
| Current Sensing Range | ±40 mV to ±320 mV full-scale (PGA-selectable); supports shunt values from 0.5 mΩ to 10 mΩ at 10 A–100 A. |
| Bus Voltage Range | 0 V to +26 V common-mode; BRNG bit selects 16 V or 32 V ADC scaling - compatible with 12 V/24 V industrial rails. |
| ADC Resolution | 12-bit basic resolution; 13-bit temperature data format (0.0625°C/LSB) with twos-complement output. |
| SMBus Compatibility | 3.4 MHz max clock; 25–35 ms timeout; open-drain SDA/SCL with 6 mA sink capability - interoperable with standard host controllers. |
| Supply Range | +3 V to +26 V; quiescent current 1.0–1.4 mA active, 55–100 μA in power-down mode. |
Pinout & Package
Package: SOIC-14 (D package), body size 8.65 mm × 3.91 mm, 1.27 mm pitch, JEDEC MS-012AC.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Filter C) | Subregulator output filter node | Connects to 470 nF capacitor (Config 1/2) or 100 nF (Config 3); stabilizes internal 3.3 V regulator for ADC/digital core. |
| 2 (V+) | Main power supply input | Accepts +3 V to +26 V; powers analog front-end, digital logic, and subregulator - no external regulator needed. |
| 3 (VIN+) | Shunt voltage sense positive | Connects to high-side of current-sense resistor; differential input with VIN− defines shunt drop. |
| 4 (VIN−) | Shunt voltage sense negative | Reference point for shunt measurement; also serves as bus voltage return (0 V reference). |
| 5 (SDA) | Two-wire serial data line | Open-drain SMBus data I/O; requires external pull-up; supports read/write commands and alert response. |
| 6 (SCL) | Two-wire serial clock line | Open-drain SMBus clock input; synchronizes register access and conversion triggers. |
| 7 (A0) | Slave address select | Defines LSB of 7-bit slave address (1011100–1011111); enables up to four TMP512AIDR devices on one bus. |
| 8 (DXP1) | Remote channel 1 positive | Drives excitation current into PNP/NPN base-emitter junction; paired with DXN1 for diode-connected transistor sensing. |
| 9 (DXN1) | Remote channel 1 negative | Completes remote sensor loop; used with DXP1 to cancel series resistance up to 3 kΩ. |
| 10 (DXP2) | Remote channel 2 positive | Second independent remote sensing path; identical functionality to DXP1/DXN1 pair. |
| 11 (DXN2) | Remote channel 2 negative | Second remote sensor return; enables dual-processor or dual-VRM thermal monitoring. |
| 12 (GPIO) | General-purpose I/O | Totem-pole output or digital input; default state is high-impedance input; programmable via SMBus registers. |
| 13 (ALERT) | Interrupt output | Open-drain alert signal asserted when temperature/voltage/current exceeds programmed thresholds. |
| 14 (GND) | Analog/digital ground | Single ground reference for all analog measurements, digital logic, and SMBus interface - no split-ground requirement. |
Key Features
| Feature | Design Value |
|---|---|
| Dual remote diode sensing | Independent DXP1/DXN1 and DXP2/DXN2 channels enable simultaneous thermal monitoring of CPU and GPU or dual power stages. |
| Series resistance cancellation | Hardware-based compensation for up to 3 kΩ PCB trace resistance - eliminates calibration overhead and improves field reliability. |
| Programmable n-factor correction | Adjustable ideality factor (1.008 default) stored in registers 16h/17h - matches actual transistor characteristics for accurate remote junction readings. |
| High-accuracy power telemetry | Direct readout in amps (via calibration register) and watts (internal multiplier) - supports dynamic power budgeting in servers and telecom equipment. |
| Three subregulator configurations | Configurable V+ routing (direct, regulated, or shorted) allows operation from 3 V to 26 V while maintaining 0–26 V bus voltage range compatibility. |
Applications
| Server VRM Monitoring | Industrial PLC Power Management |
|---|---|
Use Scenario: Real-time current, voltage, and temperature tracking of multiphase buck converters supplying CPU/GPU cores in 1U/2U rack servers. IC Role / Device Role / Timing Role: Dual remote sensors monitor MOSFET junction temps; shunt monitor measures phase current; SMBus reports data to BMC every 100 ms. Use Value: Enables per-phase thermal derating and dynamic current limiting - reducing thermal runaway risk and extending component lifetime by >20% under transient load. | Use Scenario: Monitoring 24 V DC input rail, auxiliary 5 V supply, and motor drive stage temperature in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: VIN+/VIN− senses 24 V bus; DXP1/DXN1 tracks heatsink temp; ALERT asserts on overvoltage or overtemperature fault. Use Value: Provides single-chip replacement for discrete op-amp + comparator + ADC solutions - cutting BOM count by 7 parts and layout area by 35%. |
| Notebook Battery Protection | Telecom Rectifier Module |
Use Scenario: Measuring battery pack voltage, charge/discharge current, and battery cell temperature in ultrabook platforms with space-constrained layouts. IC Role / Device Role / Timing Role: Bus voltage register reads battery voltage; current register computes Coulomb counting; local sensor validates die temperature during fast charging. Use Value: Achieves ±1% current accuracy over –10°C to +60°C - improving state-of-charge estimation error from ±5% to ±1.2% across lifecycle. | Use Scenario: Monitoring output current, -48 V bus voltage, and rectifier module heatsink temperature in central office power systems. IC Role / Device Role / Timing Role: High-side shunt monitors 100 A output; DXP2/DXN2 tracks heatsink; SMBus alerts on overcurrent before fuse blow. Use Value: Supports predictive maintenance via trend analysis of power loss (I²R) vs. temperature - reducing unplanned downtime by 30% in legacy telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature and power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP513AIDR | Triple remote sensor channels (DXP1/DXN1, DXP2/DXN2, DXP3/DXN3); same pinout except NC pins replace GPIO/ALERT in SO-16 package. | Required for systems needing ≥3 thermal zones (e.g., multi-socket servers, FPGA+ASIC+memory stacks). | Select TMP513AIDR only if third remote channel is mandatory; TMP512AIDR offers lower cost and smaller footprint for dual-zone use cases. |
| INA226AIDR | Current/voltage/power monitor only - no temperature sensing; 16-bit ADC, 0.1% current accuracy, but lacks remote/local diode interfaces and ALERT functionality. | Suitable for pure power telemetry where thermal monitoring is handled separately (e.g., by microcontroller GPIO + external thermistor). | Choose INA226AIDR when precision current measurement dominates requirements and temperature sensing is secondary or offloaded. |
Compared with TMP513AIDR, TMP512AIDR reduces channel count and simplifies layout for dual-thermal-zone systems; versus INA226AIDR, it integrates temperature sensing and alerting - eliminating need for external comparators and reducing total solution size by 40%.
Availability
TMP512AIDR is available at Aetrix Electronics and suitable for server VRM monitoring, industrial PLC power management, and telecom rectifier module applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TMP512AIDR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision sensing and power management ICs.
The TMP512AIDR belongs to TI's temperature and power supply system monitor product line, designed specifically for real-time thermal-aware power telemetry in high-reliability computing, industrial, and telecom infrastructure.
FAQ
What is the maximum remote sensor series resistance supported by the TMP512AIDR?
The TMP512AIDR supports automatic series resistance cancellation up to 3 kΩ across both DXP1/DXN1 and DXP2/DXN2 channels. This hardware-based compensation eliminates measurement offset caused by PCB trace resistance and eliminates need for factory calibration - verified per Figure 15 in SBOS491A datasheet.
Does the TMP512AIDR require an external voltage regulator?
No, the TMP512AIDR does not require an external voltage regulator. Its integrated subregulator generates a stable 3.3 V supply internally and supports three configuration modes - including direct V+ operation (3 V–26 V) and filtered 3.3 V output - eliminating need for external LDOs in most designs.
How does the TMP512AIDR handle n-factor variation between different remote transistors?
The TMP512AIDR stores adjustable n-factor values in registers 16h (channel 1) and 17h (channel 2). Default value is 1.008, but users can write custom values to match specific transistor characteristics - enabling accurate remote junction temperature calculation per Equation 2 in SBOS491A.
Can the TMP512AIDR measure bus voltages below 0 V?
No, the TMP512AIDR cannot measure bus voltages below 0 V. Its VIN− pin serves as the 0 V reference, and the common-mode input range is specified from –0.3 V to +26 V. Negative bus voltages require external level-shifting circuitry or alternative devices rated for bipolar operation.
What is the conversion time for temperature measurements on the TMP512AIDR?
The TMP512AIDR requires 100–130 ms per temperature channel conversion, as specified in the Electrical Characteristics table (page 5, "Temperature Measurement Conversion Time"). This includes both local and remote sensor acquisition cycles - critical for thermal loop timing in closed-loop fan control systems.
TMP512AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor), Watchdog
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±2.5°C Local(Max), ±5°C Remote(Max)
- Topology:
- ADC, Multiplexer, Register Bank
- Output Type:
- 2-Wire Serial, I2C/SMBUS
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 3V ~ 26V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TMP512AIDR FAQ
1.How can I place an order for TMP512AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP512AIDR 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 TMP512AIDR reliable?
The price and inventory of TMP512AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP512AIDR is usually 5 days.
3.What payment methods are accepted for TMP512AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP512AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP512AIDR?
TMP512AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP512AIDR 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 TMP512AIDR?
For technical support, including TMP512AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP512AIDR requirements.
6.How does Aetrix verify that TMP512AIDR is sourced from the original manufacturer or authorized distributors?
All TMP512AIDR 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 TMP512AIDR meets industry standards.
7.What is the process for return or replacement of TMP512AIDR?
All TMP512AIDR units undergo pre-shipment inspection (PSI). If there is an issue with TMP512AIDR, 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 TMP512AIDR part is unused and in its original packaging.
Return procedure for TMP512AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TMP512AIDR Tags
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