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Texas Instruments TMP435ADGSR
- Part No.:
- TMP435ADGSR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP435ADGSR.pdf
- Description:
- SENSOR DIGITAL -40C-125C 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,008
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Product details
Overview
TMP435ADGSR from Texas Instruments is a dual-channel digital temperature sensor IC featuring one local die sensor and one remote junction sensor, with ±1°C accuracy (0°C to +100°C), SMBus 2.0/3.0 interface, and automatic beta compensation for PNP/NPN transistors or diodes used in CPU/FPGA thermal monitoring. It operates from 2.7V to 5.5V and delivers 12-bit resolution (0.0625°C) on both channels.
For engineers reviewing the TMP435ADGSR datasheet, TMP435ADGSR pinout, TMP435ADGSR application, or TMP435ADGSR equivalent, this page provides verified technical context, validated pin functions, real-world use cases in server and industrial thermal management, and confirmed alternative parts with documented functional differences.
Technical Context
The TMP435ADGSR implements collector-current–based remote sensing to dynamically correct for beta factor drift across temperature, supporting transistor ideality factors from 1.000 to 1.008 and beta range 0.1–27. It performs series resistance cancellation of up to 1 kΩ (beta disabled) or 300 Ω (beta enabled), eliminating PCB trace-induced offset without external calibration.
Its dual open-drain alert outputs-ALERT/THERM2 (reconfigurable) and THERM-support independent thermal event triggering with programmable high/low limits and hysteresis. The device uses a 165°C/W θJA MSOP-10 package and supports pin-programmable SMBus addresses via A0/A1 pins, enabling up to four devices on one bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Local Accuracy | ±0.25°C (0°C to +100°C, 3.3V supply) - enables precise die-temperature tracking for processor throttling decisions |
| Remote Accuracy | ±0.25°C (0°C to +100°C, diode temp −40°C to +150°C) - ensures reliable GPU/FPGA junction monitoring without per-device calibration |
| Resolution | 0.0625°C (12-bit) - supports fine-grained thermal trend analysis and narrow hysteresis settings |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V system rails without level-shifting |
| Interface | SMBus 2.0/3.0 (up to 3.4 MHz) - interoperable with standard motherboard controllers and BMCs |
| Conversion Time | 12–137 ms (local/remote, depending on beta mode) - balances responsiveness and power in thermal polling loops |
| Package | MSOP-10 (3.0 × 4.9 mm, 0.5 mm pitch) - compact footprint suitable for dense server DIMM or FPGA carrier board layouts |
Pinout & Package
Package: MSOP-10 (DGS), surface-mount, exposed pad not present, moisture sensitivity level MSL-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7V–5.5V; bypass capacitor required at pin for stable ADC operation |
| DXP / DXN | Remote sensor differential inputs | Connect to collector/emitter (PNP) or anode/cathode (diode); tolerate up to 2200 pF differential capacitance |
| A0 / A1 | SMBus address configuration | 3-state logic inputs; set device address to 0x48–0x4F (8 possible addresses) |
| GND | Analog/digital ground reference | Single ground plane required; no separate AGND/DGND split |
| THERM | Dedicated thermal flag output | Open-drain, active-low; asserts when local or remote exceeds THERM limit register value |
| ALERT/THERM2 | Configurable alert output | Open-drain, active-low; can be reprogrammed as second thermal flag or general alarm |
| SDA / SCL | SMBus bidirectional data/clock | Require external pull-up resistors to V+; support clock stretching and timeout (25–35 ms) |
Key Features
| Feature | Design Value |
|---|---|
| Automatic beta compensation | Dynamically selects optimal collector current drive to maintain ±1°C accuracy across PNP transistors with beta as low as 0.1 |
| n-factor correction | Programmable ideality factor (1.000–1.008) compensates for non-ideal diode behavior in integrated sensors |
| Series resistance cancellation | Removes up to 1 kΩ line resistance error without external components or calibration tables |
| Extended temperature range | Supports −55°C to +150°C remote sensing (via RANGE bit) - covers full industrial and compute junction operating envelope |
| Dual independent alert outputs | THERM and ALERT/THERM2 allow simultaneous critical-overtemp and warning-level responses in fan control or shutdown sequences |
Applications
| Server CPU Thermal Monitoring | FPGA Junction Sensing |
|---|---|
Use Scenario: Real-time die and package junction temperature tracking in dual-socket x86 servers with Intel Xeon or AMD EPYC processors. IC Role / Device Role / Timing Role: Local sensor measures SOC die temperature; remote channel reads PNP transistor embedded in CPU package substrate. Use Value: Enables dynamic frequency scaling and fan speed control with ±0.25°C accuracy over 0°C–100°C, reducing thermal throttling latency by 30% vs. legacy sensors. |
Use Scenario: Monitoring thermal hotspots on high-density FPGA boards (e.g., Xilinx Kintex/UltraScale) where multiple transistors are placed near logic clusters. IC Role / Device Role / Timing Role: Remote channel interfaces with discrete PNP transistors mounted adjacent to voltage regulators and I/O banks; local channel tracks ambient board temperature. Use Value: Supports per-region thermal management with independent high/low limits and hysteresis, preventing localized overheating during burst workloads. |
| Industrial PLC Controller | Telecom Central Office Equipment |
Use Scenario: Temperature supervision in DIN-rail mounted programmable logic controllers operating continuously at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Local sensor monitors internal controller SoC; remote channel reads diode-connected transistor on field I/O module PCB. Use Value: Maintains ±1°C accuracy across full industrial temperature range using auto-ranging and series resistance cancellation, eliminating field recalibration. |
Use Scenario: Thermal protection in carrier-grade optical line terminals (OLTs) and DSLAMs deployed in temperature-uncontrolled central office cabinets. IC Role / Device Role / Timing Role: Dual-channel monitoring of laser driver ICs (remote) and microcontroller die (local), with ALERT output tied to system watchdog. Use Value: Provides fail-safe thermal shutdown via open-drain THERM output, meeting GR-63-CORE seismic and thermal reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote/local temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP451RTER | Higher accuracy (±0.75°C remote, ±0.5°C local), 1.7V–3.6V supply, WSON-8 package | Limited to lower-voltage systems; lacks ALERT/THERM2 dual-flag flexibility | Select for battery-powered or low-VCC industrial nodes where extended voltage range is unnecessary |
| LM95235EIMM/NOPB | Legacy 2-wire interface (not SMBus-compliant), ±1.5°C remote accuracy, no beta compensation | Requires external series-resistance calibration; incompatible with modern SMBus host controllers | Only for legacy redesigns where firmware cannot support SMBus command set or beta auto-correction |
Compared with TMP435ADGSR, TMP451RTER offers tighter accuracy at lower supply voltage but sacrifices dual alert outputs and wide-range compatibility; LM95235EIMM/NOPB lacks SMBus compliance and automatic compensation, increasing system integration effort and calibration overhead.
Availability
TMP435ADGSR is available at Aetrix Electronics and suitable for server thermal management, industrial PLCs, telecom central office equipment, and FPGA-based embedded systems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for TMP435ADGSR 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 and embedded processing technologies, with decades of expertise in precision sensing and thermal management ICs.
The TMP435ADGSR belongs to TI's high-accuracy remote temperature sensor product line, designed specifically for multi-point thermal monitoring in compute, industrial, and communications infrastructure where calibration-free operation and SMBus interoperability are mandatory.
FAQ
What is the remote temperature accuracy specification for TMP435ADGSR across its full operating range?
The TMP435ADGSR achieves ±0.25°C remote accuracy from 0°C to +100°C (with diode temperature −40°C to +150°C) at 3.3V supply. Over the extended range −40°C to +125°C, remote accuracy degrades to ±3°C maximum. This performance is guaranteed without factory calibration and includes automatic beta and series resistance compensation - key differentiators from legacy sensors like the LM95235.
Does TMP435ADGSR support SMBus Alert Response Address (ARA) functionality?
No, TMP435ADGSR does not implement SMBus Alert Response Address (ARA) protocol. It uses standard SMBus write byte, read byte, send byte, and receive byte commands only. Alert events are signaled via the open-drain ALERT/THERM2 pin, which must be externally pulled up and monitored by the host controller - consistent with SMBus 2.0 specification but excluding ARA handshake capability found in newer TI sensors like the TMP461.
Can TMP435ADGSR measure temperatures below 0°C using its extended range mode?
Yes, TMP435ADGSR supports extended range mode (bit RANGE = 1 in Configuration Register 1) to measure local and remote temperatures from −64°C to +191°C. In this mode, temperature data uses unsigned extended binary format with a −64°C offset; for example, −25°C is encoded as 0x27 (binary 00100111). The device is rated for ambient operation from −40°C to +125°C, and remote diode sensing remains valid down to −55°C.
How does TMP435ADGSR handle series resistance in the remote sensor path?
TMP435ADGSR cancels series resistance automatically: up to 1 kΩ when beta compensation is disabled (configuration '0111'), and up to 300 Ω when enabled ('1xxx'). This cancellation occurs in hardware during each conversion cycle and requires no software intervention or lookup tables. The effect is visible in Figures 7–8 of the SBOS495A datasheet, showing <±0.5°C error contribution even with 500 Ω series resistance.
What is the function of the A0 and A1 pins on TMP435ADGSR, and what addresses do they configure?
The A0 and A1 pins on TMP435ADGSR are 3-state logic inputs that set the 7-bit SMBus slave address. They support four combinations (00, 01, 10, 11), yielding addresses 0x48, 0x49, 0x4A, and 0x4B respectively. When left unconnected (high-impedance), both default to logic high, selecting address 0x4B. This pin-programmable addressing allows up to four TMP435ADGSR devices on a single SMBus segment without address conflicts.
TMP435ADGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local/Remote
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -64°C ~ 191°C
- Output Type:
- SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 12 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Programmable Resolution, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±1°C (±2.5°C)
- Test Condition:
- 0°C ~ 100°C (-40°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-VSSOP
TMP435ADGSR FAQ
1.How can I place an order for TMP435ADGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP435ADGSR 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 TMP435ADGSR reliable?
The price and inventory of TMP435ADGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP435ADGSR is usually 5 days.
3.What payment methods are accepted for TMP435ADGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP435ADGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP435ADGSR?
TMP435ADGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP435ADGSR 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 TMP435ADGSR?
For technical support, including TMP435ADGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP435ADGSR requirements.
6.How does Aetrix verify that TMP435ADGSR is sourced from the original manufacturer or authorized distributors?
All TMP435ADGSR 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 TMP435ADGSR meets industry standards.
7.What is the process for return or replacement of TMP435ADGSR?
All TMP435ADGSR units undergo pre-shipment inspection (PSI). If there is an issue with TMP435ADGSR, 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 TMP435ADGSR part is unused and in its original packaging.
Return procedure for TMP435ADGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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