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Analog Devices Inc. AD22100SR-REEL7
- Part No.:
- AD22100SR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD22100SR-REEL7.pdf
- Description:
- SENSOR ANALOG -50C-150C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,654
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Product details
Overview
AD22100SR-REEL7 from Analog Devices is a monolithic ratiometric voltage-output temperature sensor IC with integrated signal conditioning, operating across −50°C to +150°C. It delivers a linear output of 0.25 V at −50°C and 4.75 V at +150°C (with 5.0 V supply), features ±2.0°C total error over temperature, 22.5 mV/°C temperature coefficient, and reverse voltage protection - used in HVAC systems, board-level thermal monitoring, and automotive cabin temperature sensing.
For engineers reviewing the AD22100SR-REEL7 datasheet, AD22100SR-REEL7 pinout, AD22100SR-REEL7 application, or AD22100SR-REEL7 equivalent, key selection criteria include guaranteed −50°C to +150°C operation, SOIC-8 packaging, ratiometric ADC interface compatibility, and minimal external circuitry requirements for cost-sensitive embedded thermal measurement.
Technical Context
The AD22100SR-REEL7 implements a proprietary on-die temperature-dependent resistor (RT) excited by a supply-proportional current source, generating a voltage that is both linear with temperature and ratiometric to V+. Its op amp-based signal conditioning block applies fixed gain and offset to realize the transfer function VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA].
This architecture eliminates need for external trimming, buffering, or linearization circuitry. The output stage uses a PNP emitter-follower sourcing structure with a fixed −80 µA current sink, enabling robust short-circuit tolerance to ground or V+, but limiting sink capability - confirming its design intent for grounded-load interfacing, especially with microcontroller ADC inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | −50°C to +150°C - fully specified and guaranteed performance across full industrial and automotive ambient extremes. |
| Output Voltage Range | 0.25 V to 4.75 V @ 5.0 V supply - spans 90% of 0–5 V ADC input range, maximizing resolution without clipping. |
| Temperature Coefficient | 22.5 mV/°C (ratiometric) - enables direct scaling of output change per degree, simplifying calibration and firmware interpretation. |
| Total Error | ±4.0°C max over full temperature range - includes initial offset, span, and nonlinearity contributions; supports ±2°C system-level accuracy after basic two-point calibration. |
| Supply Voltage | 4.0 V to 6.5 V - compatible with standard 5 V logic rails and tolerant of typical power rail variation in embedded systems. |
| Quiescent Current | 500–650 µA - enables low-power operation in battery-backed or energy-constrained thermal monitoring nodes. |
| Ratiometric Error | <1% over 4–6.5 V supply - ensures consistent ADC code-to-temperature mapping even with unregulated supply rails. |
Pinout & Package
AD22100SR-REEL7 is supplied in an 8-lead SOIC package (JEDEC MS-012AA, R-8 outline), with pins 1 (V+), 2 (VO), 4 (GND), and five no-connect terminals (pins 3, 5–8). This compact surface-mount package supports automated assembly and provides improved thermal response vs. TO-92 in PCB-mounted applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Power supply input - must be decoupled near device; supplies internal bias, RT excitation, and output stage. |
| 2 | VO | Voltage output - high-impedance ratiometric analog signal; requires ≤1 mA load for optimal accuracy and minimal self-heating. |
| 3 | NC | No connect - left floating; not internally bonded or electrically active. |
| 4 | GND | Analog ground reference - must be connected directly to system 0 V plane; critical for output accuracy and noise immunity. |
| 5–8 | NC | No connect - unused pins; no internal connection; may be left unconnected or tied to GND for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip signal conditioning | Eliminates need for external op amps, resistors, or trimming components - reduces BOM count and layout area by ≥4 passive parts. |
| Ratiometric output | Enables shared 5 V supply between AD22100SR-REEL7 and ADC - removes requirement for precision voltage reference, cutting system cost by ~$0.30–$0.50. |
| Reverse voltage protection | Withstands −10 V continuous reverse supply - prevents damage during board handling, miswiring, or transient polarity reversal in field-deployed equipment. |
| Minimal self-heating | Dissipates ≤2.2 mW at 5 V - limits thermal error to ≤0.4°C in still air, preserving measurement fidelity in thermally isolated mounting scenarios. |
| Short-circuit tolerant output | Indefinite short to GND or V+ - enhances reliability in noisy environments or during hot-plug events without external current limiting. |
Applications
| HVAC Zone Sensing | Automotive Cabin Monitoring |
|---|---|
|
Use Scenario: Measuring air temperature in ducts, vents, or passenger compartments for climate control feedback loops. IC Role / Device Role / Timing Role: Primary analog temperature transducer providing real-time, calibrated voltage output to HVAC controller MCU. Use Value: Guaranteed −50°C to +150°C operation covers cold-start and under-hood thermal extremes; ratiometric output maintains accuracy despite vehicle battery voltage fluctuations (11–14 V). |
Use Scenario: Monitoring interior cabin temperature for automatic fan speed and blend door actuation in OEM infotainment-integrated climate modules. IC Role / Device Role / Timing Role: High-reliability, single-chip temperature sensor interfaced directly to 8-bit automotive-grade MCU ADC. Use Value: SOIC-8 package enables compact placement near heat sources; ±4.0°C max error supports ASHRAE-compliant comfort control within ±1.5°C system tolerance. |
| Industrial Process Controller | Electronic Thermostat |
|
Use Scenario: Embedded thermal feedback in programmable logic controller (PLC) I/O modules measuring ambient or enclosure temperature. IC Role / Device Role / Timing Role: Standalone analog sensor with minimal support circuitry, reducing design cycle time for certified industrial hardware. Use Value: Reverse voltage protection and 150°C junction rating allow safe operation in harsh factory environments with frequent maintenance wiring changes. |
Use Scenario: Core temperature sensing element in residential or commercial wall-mounted thermostats requiring long-term stability and low-cost BOM. IC Role / Device Role / Timing Role: Direct replacement for thermistor + amplifier solutions, delivering factory-calibrated linearity without NTC lookup tables. Use Value: 22.5 mV/°C slope and 0.25–4.75 V range simplify firmware implementation; <1% ratiometric error avoids recalibration when using switched-mode 5 V supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-output temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM35DH/NOPB | Non-ratiometric, 10 mV/°C output; no reverse voltage protection; max 100°C operating range. | Limited to lower-temp consumer electronics; requires separate precision reference and lacks automotive-grade thermal range. | Select LM35DH/NOPB only if operating below +100°C and supply rail is highly stable; AD22100SR-REEL7 preferred for extended range and ruggedness. |
| TSYS02D | Digital I²C output; factory-calibrated; 0.1°C typical accuracy; 3.3 V only; no reverse voltage protection. | Requires MCU with I²C peripheral; eliminates ADC channel usage but adds firmware complexity for calibration compensation. | Choose TSYS02D when digital interface and higher accuracy are prioritized over analog simplicity and wide supply tolerance; AD22100SR-REEL7 better for legacy 5 V ADC designs. |
Compared with LM35DH/NOPB and TSYS02D, AD22100SR-REEL7 uniquely combines −50°C to +150°C guaranteed operation, ratiometric 5 V ADC compatibility, reverse voltage protection, and SOIC-8 manufacturability - making it the optimal choice for cost-sensitive, thermally demanding analog temperature measurement where supply regulation is limited.
Availability
AD22100SR-REEL7 is available at Aetrix Electronics and suitable for HVAC systems, automotive cabin monitoring, and industrial process controllers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AD22100SR-REEL7 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and instrumentation markets.
The AD22100 family was designed specifically to replace discrete thermistor-amplifier circuits in embedded thermal sensing applications, delivering factory-trimmed linearity, supply insensitivity, and simplified system integration - with AD22100SR-REEL7 targeting high-reliability, wide-temperature industrial and automotive use cases.
FAQ
What is the guaranteed operating temperature range for AD22100SR-REEL7?
The AD22100SR-REEL7 is fully specified and guaranteed over −50°C to +150°C, matching the widest temperature grade in the AD22100 family. This range is validated per Analog Devices' Rev. D datasheet Table 1 and Ordering Guide, and applies specifically to the SR variant in SOIC-8 packaging - enabling use in under-hood automotive, industrial furnace controls, and outdoor HVAC equipment where extreme ambient conditions occur.
Does AD22100SR-REEL7 require external calibration for accurate temperature measurement?
The AD22100SR-REEL7 does not require external calibration to meet its datasheet specifications: total error is guaranteed ≤±4.0°C over −50°C to +150°C. However, applying a simple two-point calibration (e.g., at 0°C and 100°C) can reduce residual error to ≤±0.5°C by correcting for unit-specific offset and gain deviations - a common practice in precision HVAC and test equipment using AD22100SR-REEL7.
Can AD22100SR-REEL7 drive an ADC input directly without a buffer amplifier?
Yes, AD22100SR-REEL7 can drive most microcontroller ADC inputs directly. Its low-impedance output (PNP emitter follower) and ≤1 mA recommended load current ensure minimal voltage droop. A 1 kΩ series resistor and 0.1 µF capacitor at the ADC input (per Figure 2 in the datasheet) are sufficient to suppress charge injection glitches - eliminating need for an op amp buffer in typical 8- to 12-bit embedded systems using AD22100SR-REEL7.
What is the meaning of "ratiometric" in AD22100SR-REEL7's output behavior?
"Ratiometric" means AD22100SR-REEL7's output voltage scales proportionally with its supply voltage V+: VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA]. This allows the same 5 V rail to serve as both the AD22100SR-REEL7 supply and the ADC reference - so supply variations affect both equally, canceling out ratio errors and removing need for a dedicated precision reference IC in the system using AD22100SR-REEL7.
Is AD22100SR-REEL7 pin-compatible with other variants like AD22100AR-REEL7 or AD22100KR-REEL7?
Yes, AD22100SR-REEL7 shares identical SOIC-8 pinout (V+, VO, GND, and five NCs) and electrical interface with AD22100AR-REEL7 and AD22100KR-REEL7. The only differences are guaranteed temperature ranges (−50°C to +150°C vs. −40°C to +85°C vs. 0°C to +100°C) and corresponding accuracy specs - allowing drop-in replacement in existing layouts when upgrading thermal performance, provided system-level validation confirms operation at extended extremes for AD22100SR-REEL7.
AD22100SR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -50°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4V ~ 6.5V
- Resolution:
- 22.5mV/°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±2°C (±4°C)
- Test Condition:
- 25°C (-50°C ~ 150°C)
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AD22100SR-REEL7 FAQ
1.How can I place an order for AD22100SR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD22100SR-REEL7 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 AD22100SR-REEL7 reliable?
The price and inventory of AD22100SR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD22100SR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD22100SR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD22100SR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD22100SR-REEL7?
AD22100SR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD22100SR-REEL7 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 AD22100SR-REEL7?
For technical support, including AD22100SR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD22100SR-REEL7 requirements.
6.How does Aetrix verify that AD22100SR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD22100SR-REEL7 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 AD22100SR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD22100SR-REEL7?
All AD22100SR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD22100SR-REEL7, 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 AD22100SR-REEL7 part is unused and in its original packaging.
Return procedure for AD22100SR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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