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Analog Devices Inc. AD22100KR
- Part No.:
- AD22100KR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD22100KR.pdf
- Description:
- SENSOR ANALOG 0C-100C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,821
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Product details
Overview
AD22100KR from Analog Devices is a monolithic voltage-output temperature sensor IC with integrated signal conditioning, designed for precision board-level sensing in 0°C to +100°C industrial and automotive applications. It delivers ratiometric output (0.25 V at −50°C to 4.75 V at +150°C), ±2% full-scale accuracy, ±1% linearity, 22.5 mV/°C temperature coefficient, and operates from 4 V to 6.5 V single supply.
For engineers reviewing the AD22100KR datasheet, AD22100KR pinout, AD22100KR application, or AD22100KR equivalent, this page provides verified functional specifications, SOIC-8 package details, thermal interface guidance, microcontroller ADC interfacing methods, and validated alternative options for HVAC, system compensation, and embedded temperature monitoring designs.
Technical Context
The AD22100KR implements a proprietary on-die temperature-dependent resistor excited by a supply-proportional current source, enabling ratiometric output scaling. Its op amp-based signal conditioning block applies precise gain and offset to realize the transfer function VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA].
This architecture eliminates external trimming, buffering, or linearization circuitry. The output stage uses a PNP emitter-follower sourcing structure with a fixed −80 µA current sink, limiting sink capability but ensuring robust short-circuit tolerance to ground or V+ and supporting grounded-load operation up to 1 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Voltage output proportional to temperature × V+, enabling ratiometric ADC interfacing without precision reference. |
| Temperature Range | Guaranteed 0°C to +100°C; operational −50°C to +150°C - supports extended use beyond rated range with defined error bounds. |
| Accuracy | ±2.0°C total error over guaranteed range - includes initial offset, span, and nonlinearity contributions. |
| Linearity | Better than ±1% of full scale (200°C span) - ensures <±2°C deviation from ideal transfer curve across operating range. |
| Supply Voltage | 4.0 V to 6.5 V - compatible with standard 5 V logic rails and tolerant of typical power rail variation. |
| Quiescent Current | 500 µA to 650 µA - enables low-power operation; self-heating <0.4°C in still air with 5 V supply. |
| Output Swing | 0.25 V at −50°C to 4.75 V at +150°C with 5 V supply - fully utilizes 0–5 V ADC input range for 8-bit resolution (~0.87°C/LSB). |
Pinout & Package
AD22100KR is housed in an 8-lead SOIC package (JEDEC MS-012AA, outline R-8), with four no-connect pins and three active terminals. Thermal resistance θJA is 75°C/W in moving air and 190°C/W in still air, requiring attention to mounting for accuracy-critical applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Power supply input - must be stable 4–6.5 V; supplies internal current source and op amp stages. |
| 2 | VO | Voltage output node - high-level, low-impedance source; drives grounded loads ≤1 mA for optimal accuracy. |
| 3 | NC | No connect - electrically isolated; no internal connection or function. |
| 4 | GND | Ground reference - must be connected to 0 V; forms return path for supply and output current. |
| 5–8 | NC | No connect - all four pins are unconnected internally; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric output | Eliminates need for precision voltage reference when sharing ADC supply rail - reduces BOM cost and layout complexity. |
| On-chip signal conditioning | Integrates gain, offset, and linearity correction - removes external op amps, resistors, and calibration components. |
| Reverse voltage protection | Tolerates −10 V continuous reverse supply - prevents damage during board handling or power sequencing errors. |
| Minimal self-heating | Dissipates ~2.2 mW at 25°C - limits thermal error to <0.4°C in still air, critical for static ambient measurements. |
| High-level output drive | Sources up to 7 mA short-circuit current - supports direct connection to ADC inputs without buffer amplifiers. |
Applications
| HVAC Systems | System Temperature Compensation |
|---|---|
|
Use Scenario: Monitoring air inlet/outlet temperature in commercial HVAC controllers to regulate heating/cooling cycles. IC Role / Device Role / Timing Role: Primary analog temperature transducer providing calibrated voltage output to microcontroller ADC. Use Value: ±2°C accuracy and ratiometric output ensure stable setpoint control across supply variations without recalibration. |
Use Scenario: Compensating drift in precision analog circuits (e.g., op amp offsets, reference voltages) within industrial instrumentation. IC Role / Device Role / Timing Role: On-board environmental sensor feeding real-time correction data to digital compensation algorithms. Use Value: Integrated signal conditioning and 0.87°C effective resolution enable accurate, low-cost closed-loop thermal correction. |
| Board-Level Temperature Sensing | Electronic Thermostats |
|
Use Scenario: Measuring PCB junction temperature near power MOSFETs or FPGAs to trigger thermal throttling or fan control. IC Role / Device Role / Timing Role: Localized thermal monitor with fast response (<3.5 sec in moving air) and minimal self-heating. Use Value: SOIC-8 footprint allows placement adjacent to heat sources; 75°C/W θJA in airflow enables timely thermal event detection. |
Use Scenario: Serving as the core temperature measurement element in residential programmable thermostats. IC Role / Device Role / Timing Role: Primary sensing element converting ambient temperature into a microcontroller-readable voltage signal. Use Value: Single-supply 5 V operation, reverse voltage protection, and ±2% accuracy meet UL/CE safety and performance requirements. |
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 output (10 mV/°C), no supply-voltage dependency; ±0.5°C typical accuracy; TO-220 package. | Lacks ratiometric advantage - requires separate precision reference for ADC; better absolute accuracy but higher system cost. | Select when absolute voltage accuracy > ratiometric simplicity; avoid if sharing ADC reference with other ratiometric sensors. |
| TSIC506-100 | Digital I²C output; ±0.5°C accuracy; 0.1°C resolution; built-in EEPROM calibration; SOIC-8 package. | Replaces analog signal chain with digital interface - eliminates ADC requirement but adds firmware overhead. | Select when digital integration, higher resolution, or factory calibration traceability are prioritized over analog simplicity. |
Compared with LM35DH/NOPB and TSIC506-100, the AD22100KR uniquely balances analog simplicity, ratiometric ADC compatibility, and SOIC-8 manufacturability - making it optimal for cost-sensitive, supply-voltage-variable systems where moderate accuracy suffices.
Availability
AD22100KR is available at Aetrix Electronics and suitable for HVAC systems, system temperature compensation, and board-level temperature sensing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD22100KR 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD22100KR belongs to Analog Devices' precision temperature sensor product line, engineered specifically for embedded industrial and automotive systems requiring calibrated analog output without external signal conditioning.
FAQ
What is the guaranteed operating temperature range for the AD22100KR?
The AD22100KR is guaranteed for operation from 0°C to +100°C per its ordering grade. However, its operational range extends from −50°C to +150°C, with specified accuracy degradation outside the guaranteed range - e.g., ±3.7°C max error at TMIN for AD22100K variants. Always consult the Rev. D datasheet's Table 1 for full error vs. temperature curves.
How does the ratiometric nature of the AD22100KR simplify ADC interfacing?
The AD22100KR's output scales directly with its supply voltage (V+), so using the same +5 V rail for both the AD22100KR and the ADC's reference eliminates ratio-mismatch errors. This avoids needing a separate precision voltage reference, reducing cost and board space. For example, a 5% V+ shift causes only ~1% ratiometric error - far less than absolute-reference drift would introduce.
Can the AD22100KR drive an ADC input directly without a buffer amplifier?
Yes - the AD22100KR features a low-impedance, high-level output capable of sourcing up to 7 mA. It can drive typical microcontroller ADC inputs directly. For best accuracy, keep load current below 1 mA to minimize self-heating and output voltage droop; a 1 kΩ series resistor and 0.1 µF capacitor (per Figure 2) are recommended for noise immunity.
What is the meaning of "NC" on pins 3, 5–8 of the AD22100KR SOIC package?
"NC" stands for No Connect - pins 3, 5, 6, 7, and 8 of the AD22100KR have no internal electrical connection. They must remain unconnected on the PCB; no routing, grounding, or termination is required or permitted. This simplifies layout and avoids unintended parasitic coupling paths that could affect thermal or electrical performance.
Does the AD22100KR require external calibration for typical applications?
No - the AD22100KR includes factory-trimmed signal conditioning that achieves ±2% full-scale accuracy without external calibration. Its ratiometric transfer function and integrated gain/offset eliminate trimming resistors or software linearization in most cases. High-accuracy applications may apply two-point calibration to reduce residual nonlinearity to <0.5°C.
AD22100KR 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:
- 0°C ~ 100°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4V ~ 6.5V
- Resolution:
- 22.5mV/°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±2°C
- Test Condition:
- 25°C
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AD22100KR FAQ
1.How can I place an order for AD22100KR through Aetrix?
Please submit a Request for Quotation (RFQ) for AD22100KR 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 AD22100KR reliable?
The price and inventory of AD22100KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD22100KR is usually 5 days.
3.What payment methods are accepted for AD22100KR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD22100KR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD22100KR?
AD22100KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD22100KR 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 AD22100KR?
For technical support, including AD22100KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD22100KR requirements.
6.How does Aetrix verify that AD22100KR is sourced from the original manufacturer or authorized distributors?
All AD22100KR 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 AD22100KR meets industry standards.
7.What is the process for return or replacement of AD22100KR?
All AD22100KR units undergo pre-shipment inspection (PSI). If there is an issue with AD22100KR, 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 AD22100KR part is unused and in its original packaging.
Return procedure for AD22100KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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