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Analog Devices Inc. TMP17GS
- Part No.:
- TMP17GS
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP17GS.pdf
- Description:
- SENSOR ANALOG -40C-105C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,918
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Product details
Overview
TMP17GS from Texas Instruments is a precision analog current-output silicon temperature sensor with ±3.5°C accuracy at +25°C and ±4.5°C over –40°C to +105°C, delivering 1 µA/K scale factor and 298.2 µA nominal output at 25°C; it serves as a primary ambient or junction temperature transducer in industrial control, power supply monitoring, and thermal protection circuits.
For engineers reviewing the TMP17GS datasheet, TMP17GS pinout, TMP17GS application, or TMP17GS equivalent, this page delivers verified package mapping (SOIC-8 R-8), confirmed PTAT current-mode operation, absolute accuracy limits, nonlinearity (0.5°C), PSRR (0.3–0.5°C/V), and thermal time constants across media - all critical for analog front-end design, cold-junction compensation, and multiplexed remote sensing.
Technical Context
The TMP17GS implements a PTAT (Proportional-To-Absolute-Temperature) current source architecture using matched transistor pairs and thin-film resistors to generate a highly linear 1 µA/K output. Its factory-trimmed scale factor eliminates external gain calibration in basic voltage-output configurations.
It operates from 4 V to 30 V supply, exhibits 0.2°C repeatability after thermal cycling, and maintains long-term stability of 0.2°C/month at 150°C - enabling reliable deployment in unregulated supply environments and thermally demanding enclosures without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy @ +25°C | ±3.5°C - guaranteed initial calibration error at room temperature, removable via single-point trim. |
| Accuracy over –40°C to +105°C | ±4.5°C - total system error including scale factor drift and nonlinearity across full operating range. |
| Scale Factor | 1 µA/K - enables direct Kelvin-to-current conversion; 298.2 µA output at 25°C (298.2 K). |
| Power Supply Rejection Ratio | 0.3–0.5°C/V - low sensitivity to supply ripple/noise; supports use with unregulated 5–30 V rails. |
| Nonlinearity | 0.5°C - maximum deviation from best-fit line; not correctable by trimming, defines residual error floor. |
| Supply Voltage Range | 4 V to 30 V - wide compliance allows integration into 5 V, 12 V, and 24 V systems without regulation. |
| Thermal Time Constant (Still Air) | 52 sec - determines response speed in free-air mounting; reduced to 10 sec at 500 FPM airflow. |
Pinout & Package
Package: 8-Lead SOIC (Narrow Body), JEDEC MS-012AA compliant, R-8 designation, 5.00 mm × 4.00 mm body size, 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Terminal | Accepts 4 V to 30 V; powers internal PTAT core and output stage; PSRR-critical node. |
| V− | Output Current Sink Terminal | Current flows out of V−; load resistor placed between V+ and V− sets output voltage (e.g., 1 kΩ → 1 mV/K). |
| NC (Pins 3, 6, 7, 8) | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Current-Mode Output | Immune to voltage drop across long wires or switch resistance; enables remote sensing and CMOS multiplexing without accuracy loss. |
| Factory-Scaled PTAT Core | 1 µA/K output eliminates need for external gain-setting components in basic Kelvin-readout applications. |
| Single-Point Trim Support | Calibration error at 25°C can be nulled with one resistor adjustment, reducing total error to ±0.5°C typical after trim. |
| Self-Heating Error ≤ 0.2°C | Low power dissipation (≤1.5 mW at 5 V) and high thermal resistance tolerance enable accurate measurement in still-air PCB mounting. |
| ESD-Rated (4 kV HBM) | Integrated protection circuitry allows safe handling in standard assembly environments without special ESD infrastructure. |
Applications
| Industrial Temperature Monitoring | Cold-Junction Compensation (CJC) |
|---|---|
|
Use Scenario: Real-time ambient temperature tracking inside motor drives, PLC cabinets, and power converters operating from –40°C to +105°C. IC Role / Device Role / Timing Role: Primary temperature transducer providing analog current output proportional to absolute temperature for feedback and safety shutdown logic. Use Value: ±4.5°C guaranteed accuracy ensures reliable thermal derating decisions; current output rejects noise in electrically noisy industrial enclosures. |
Use Scenario: Compensating for reference-junction temperature drift in Type J, K, T, and E thermocouple signal chains. IC Role / Device Role / Timing Role: Precision Kelvin-reference source generating 1 µA/K to match thermocouple slope (e.g., ~41 µV/°C for Type K) via scaling resistor. Use Value: Eliminates simulated ice baths and bridge-based CJC; achieves >40:1 temperature rejection ratio with passive resistor networks. |
| Differential Temperature Sensing | Remote Multiplexed Sensing |
|
Use Scenario: Measuring temperature gradients across heat sinks, battery packs, or server racks using two spatially separated sensors. IC Role / Device Role / Timing Role: Paired current-output transducers feeding differential op-amp stage (e.g., OP196) to generate (T₁ − T₂) × 10 mV/°C output. Use Value: Inherent current-mode matching minimizes offset errors; differential self-heating is mitigated by equalizing power dissipation in both devices. |
Use Scenario: Scanning 8–80 discrete temperature points (e.g., CPU cores, VRMs, storage bays) using CMOS multiplexers or decoder/matrix topology. IC Role / Device Role / Timing Role: Remote node with supply-voltage-compliant current output (4–30 V) enabling single twisted-pair wiring and logic-level switching. Use Value: On-resistance of FET switches does not affect accuracy; idle power minimized via EN-controlled supply gating (e.g., AD7501 + 4028). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog temperature transducer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM35DH | Voltage-output (10 mV/°C), ±0.5°C typical accuracy at 25°C, 4 V to 30 V supply, no current-mode noise immunity. | Better raw accuracy at room temp but degrades to ±2°C over –40°C to +125°C; unsuitable for long-wire or multiplexed topologies. | Select LM35DH only when board space prohibits external I-to-V conversion and wiring is short/shielded. |
| AD590JH | Current-output (1 µA/K), ±0.5°C accuracy at 25°C, 4 V to 30 V supply, wider operating range (–55°C to +150°C). | Higher initial accuracy but requires 2-point calibration for full-range linearity; lacks integrated ESD protection (4 kV HBM). | Select AD590JH when extended low-temp operation (–55°C) or higher junction temp (150°C) is mandatory and calibration infrastructure exists. |
Compared with LM35DH and AD590JH, the TMP17GS trades minor initial accuracy for superior noise immunity, simplified single-point trim, and built-in ESD robustness - making it optimal for cost-sensitive, high-noise, or multiplexed industrial sensing where layout constraints limit shielding and regulation.
Availability
TMP17GS is available at Aetrix Electronics and suitable for industrial temperature monitoring, cold-junction compensation, and remote multiplexed sensing requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.
Supply support for TMP17GS 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 power management ICs, with decades of heritage in precision sensing and industrial signal conditioning.
The TMP17GS belongs to TI's analog temperature sensor family designed specifically for high-reliability, current-output thermal measurement in harsh electrical and thermal environments - prioritizing noise immunity, supply flexibility, and ease of system-level calibration.
FAQ
What is the guaranteed accuracy specification for the TMP17GS over its full operating temperature range?
The TMP17GS guarantees ±4.5°C accuracy over the rated temperature range of –40°C to +105°C. This includes contributions from initial calibration error, scale factor drift, and nonlinearity. The specification is measured with a precision load resistor converting the 1 µA/K current output to voltage, and reflects worst-case deviation from true Kelvin temperature under defined test conditions (VS = 5.0 V). The TMP17GS datasheet confirms this value in the "ACCURACY" table under "TMP17G Over Rated Temperature".
Can the TMP17GS be used directly with a microcontroller ADC without external amplification?
Yes, the TMP17GS can interface directly with a microcontroller ADC using a simple current-to-voltage conversion resistor. For example, a 10 kΩ resistor yields 10 mV/K (298.2 mV at 25°C), fitting within typical 0–3.3 V ADC input ranges. The TMP17GS output remains stable across supply variations (PSRR = 0.3–0.5°C/V), and its current-mode nature avoids loading errors. Layout best practices - such as keeping the load resistor close to the device and using a clean ground return - ensure resolution down to 1°C as validated in Figure 11 of the TMP17GS datasheet.
Does the TMP17GS support cold-junction compensation for thermocouples, and how is it implemented?
Yes, the TMP17GS is explicitly designed for cold-junction compensation (CJC) in thermocouple systems, as demonstrated in Figure 9 of its datasheet. It replaces simulated ice baths by providing a precise 1 µA/K output that, when scaled with a resistor (e.g., 41 Ω for Type K), matches the thermocouple's Seebeck coefficient (~41 µV/°C). The TMP17GS output is referenced to 0°C using an op-amp circuit (OP193/REF43), achieving >40:1 temperature rejection. No additional calibration is needed beyond resistor selection for the target thermocouple type and ambient range.
What is the thermal time constant of the TMP17GS in still air, and how does mounting affect response speed?
The TMP17GS has a thermal time constant of 52 seconds in still air, defined as the time to reach 63.2% of final temperature after a step change. This value is documented in Table I of the TMP17GS datasheet under "Still Air" conditions. Mounting directly to a copper PCB reduces thermal resistance (θJA), cutting the time constant to ~10 seconds at 500 FPM airflow. For faster response, thermally conductive epoxy or grease between the SOIC package and the target surface is recommended - especially in applications like motor winding monitoring where transient thermal events must be captured.
Is the TMP17GS compatible with 4–20 mA industrial current loop standards?
No, the TMP17GS is not compatible with 4–20 mA process control loops. Its output is a 1 µA/K current source optimized for local analog signal conditioning - not loop-powered transmitter compliance. While Figure 10 in the datasheet shows a discrete circuit converting TMP17GS output to 4–20 mA (e.g., for 17°C–33°C range), that implementation requires external op-amps, references, and trimming. The TMP17GS itself lacks loop-supply isolation, HART modulation capability, or 24 V loop compliance - making it unsuitable as a drop-in replacement for dedicated 4–20 mA transmitters.
TMP17GS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -40°C ~ 105°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Current
- Voltage - Supply:
- 4V ~ 30V
- Resolution:
- -
- Features:
- -
- Accuracy - Highest (Lowest):
- ±3.5°C (±4.5°C)
- Test Condition:
- 25°C (-40°C ~ 105°C)
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
TMP17GS FAQ
1.How can I place an order for TMP17GS through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP17GS 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 TMP17GS reliable?
The price and inventory of TMP17GS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP17GS is usually 5 days.
3.What payment methods are accepted for TMP17GS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP17GS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP17GS?
TMP17GS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP17GS 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 TMP17GS?
For technical support, including TMP17GS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP17GS requirements.
6.How does Aetrix verify that TMP17GS is sourced from the original manufacturer or authorized distributors?
All TMP17GS 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 TMP17GS meets industry standards.
7.What is the process for return or replacement of TMP17GS?
All TMP17GS units undergo pre-shipment inspection (PSI). If there is an issue with TMP17GS, 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 TMP17GS part is unused and in its original packaging.
Return procedure for TMP17GS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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