My Inquiry
My Account
Analog Devices Inc. AD8496ARMZ
- Part No.:
- AD8496ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8496ARMZ.pdf
- Description:
- IC THRMOCPLE AMP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8496ARMZ from Analog Devices is a precision J-type thermocouple amplifier with integrated cold junction compensation, delivering 5 mV/°C output scaling, ±2°C accuracy over +55°C to +565°C measurement range, and optimized ambient operation from 25°C to 100°C. It functions as a complete signal conditioner in oven, exhaust gas, and catalytic converter temperature sensing systems.
For engineers reviewing the AD8496ARMZ datasheet, AD8496ARMZ pinout, AD8496ARMZ application, or AD8496ARMZ equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts for J-type thermocouple signal conditioning.
Technical Context
The AD8496ARMZ integrates a fixed-gain (90.35) instrumentation amplifier, an on-die temperature sensor for cold junction compensation, and PNP-input ESD/OVP-protected terminals. Its architecture directly converts J-type thermocouple voltage into a high-level 5 mV/°C output referenced to the REF pin.
It supports single-supply operation from 2.7 V to 36 V and dual supplies up to ±18 V, with input common-mode range extending to −VS − 0.2 V and +VS − 1.6 V. Thermocouple break detection is implemented via bias current–driven rail-to-rail output when −IN is grounded through 1 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transfer Function | 5 mV/°C - Enables direct interface to 12-bit ADCs with ~0.2°C LSB resolution at 5 V supply. |
| Initial Accuracy | ±1.5°C at TA = TRJ = 60°C, TMJ = 175°C - Laser wafer trimmed for J-type matching without system calibration. |
| Ambient Temp Rejection | 0.025°C/°C - Limits error to <0.5°C over full 25°C–100°C reference junction range. |
| Quiescent Current | 180 μA - Supports battery-powered or low-power industrial sensors with <1 mW total dissipation at 5 V. |
| Input Overvoltage Range | −VS + 25 V to +VS − 25 V - Withstands transients in automotive exhaust or industrial heater environments. |
| Settling Time | 32 μs to 0.1% - Meets fast thermal response requirements in closed-loop combustion control. |
| Operating Temp Range | −40°C to +125°C - Validated for under-hood and industrial embedded deployment. |
Pinout & Package
AD8496ARMZ is housed in an RoHS-compliant 8-lead MSOP (RM-8) package with θJA = 135°C/W, suitable for compact PCB layouts and thermally coupled mounting near thermocouple reference junctions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative thermocouple input | PNP input requiring external 1 MΩ ground connection for open-circuit detection; bias current flows out. |
| 2 (REF) | Reference voltage input | Low-impedance node enabling offset adjustment (e.g., 0°C measurement on single supply); gain = 1 V/V to output. |
| 3 (−VS) | Negative supply rail | Supports dual-supply operation down to −2.7 V; unbalanced supplies permitted if common-mode stays within input range. |
| 4 (NC) | No connect | Internally unused; must remain floating per datasheet. |
| 5 (SENSE) | Setpoint mode sense feedback | In setpoint controller configuration, connects to OUT; in thermometer mode, ties to OUT to close feedback loop. |
| 6 (OUT) | Analog output | Drives ≥±5 mA load; output swing is −VS + 0.025 V to +VS − 0.1 V; short-circuit protected to 7 mA. |
| 7 (+VS) | Positive supply rail | Accepts 2.7 V to 36 V single supply or +2.7 V to +18 V dual supply; PSRR = 0.5°C/V across 2.7–5 V range. |
| 8 (+IN) | Positive thermocouple input | Differential input with 1 MΩ input impedance; rejects common-mode noise on long thermocouple leads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated cold junction compensation | On-chip temperature sensor calibrated for 25°C–100°C ambient, eliminating external RTD or thermistor circuits. |
| J-type thermocouple pretrim | Laser wafer trimming ensures 5 mV/°C transfer function matches J-type Seebeck coefficient across +55°C–+565°C range. |
| Rugged input protection | 4 kV HBM ESD rating and ±25 V overvoltage tolerance relative to opposite supply rail enable use in harsh environments. |
| Differential noise rejection | Common-mode rejection >1°C/V up to 10 kHz suppresses interference from motor drives or switching power supplies. |
| Thermocouple break detection | Self-diagnostic output railed high when −IN floats, confirmed by Figure 6 and functional block diagram. |
Applications
| Oven Temperature Control | Exhaust Gas Monitoring |
|---|---|
Use Scenario: Closed-loop temperature regulation in residential/commercial ovens using J-type thermocouples embedded in heating elements. IC Role / Device Role / Timing Role: Primary signal conditioner converting microvolt thermocouple output to stable 5 mV/°C analog voltage for PID controller input. Use Value: Eliminates need for external cold-junction sensor and precision op-amp stages, reducing BOM count and layout sensitivity to thermal gradients. |
Use Scenario: Real-time exhaust temperature measurement upstream of catalytic converters in internal combustion engines. IC Role / Device Role / Timing Role: High-reliability front-end amplifier with overvoltage protection against ignition transients and thermal shock. Use Value: 0.025°C/°C ambient rejection maintains accuracy despite rapid under-hood temperature swings from 25°C to 100°C. |
| Catalytic Converter Health | Industrial Stovetop Sensing |
Use Scenario: Dual-point monitoring of inlet/outlet temperatures across catalytic converters to infer conversion efficiency. IC Role / Device Role / Timing Role: Precision differential signal conditioner with matched gain and offset tracking between parallel channels. Use Value: Laser-trimmed initial accuracy (±1.5°C) and low gain error (0.1%) enable sub-2°C delta-T measurement critical for OBD-II diagnostics. |
Use Scenario: Surface temperature feedback in induction or radiant stovetops where J-type thermocouples are mounted beneath ceramic glass. IC Role / Device Role / Timing Role: Standalone Celsius thermometer with REF pin offset to support 0°C–300°C range on 3.3 V MCU supply. Use Value: 3.3 V compatibility and 180 μA quiescent current allow direct connection to low-voltage ADCs without level-shifting or LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar J-type thermocouple signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8494ARMZ | Optimized for 0°C–50°C ambient; initial accuracy ±1°C; gain = 96.7; same 8-lead MSOP package. | Better suited for lab-grade instruments or indoor HVAC where ambient stays near 25°C. | Select AD8494ARMZ when reference junction temperature remains within 0°C–50°C and higher initial accuracy is required. |
| MAX31855KASA+ | Thermocouple-to-digital converter with SPI output; includes linearization and cold-junction compensation; SO-8 package. | Replaces analog signal chain with digital interface; requires microcontroller firmware support. | Choose MAX31855KASA+ when digital output, built-in linearization, or multi-thermocouple channel integration is prioritized over analog simplicity. |
Compared with AD8494ARMZ, AD8496ARMZ trades slightly lower initial accuracy for superior ambient temperature rejection across a wider 25°C–100°C range-critical for automotive and industrial enclosures. Versus MAX31855KASA+, AD8496ARMZ delivers lower latency, no software dependency, and seamless analog integration but requires external linearization for highest precision.
Availability
AD8496ARMZ is available at Aetrix Electronics and suitable for oven temperature control, exhaust gas monitoring, catalytic converter health assessment, and industrial stovetop sensing requiring stable component supply across extended temperature ranges and harsh electrical environments.
Supply support for AD8496ARMZ 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, with decades of expertise in precision measurement ICs.
The AD849x family was designed specifically for thermocouple-based temperature measurement systems, integrating laser-trimmed amplification, cold-junction compensation, and robust input protection into a single IC to replace multi-component discrete solutions.
FAQ
What thermocouple type is AD8496ARMZ calibrated for?
AD8496ARMZ is laser wafer trimmed and optimized for J-type (iron-constantan) thermocouples. Its gain of 90.35 and internal cold junction compensation algorithm are specifically matched to the Seebeck coefficient and nonlinearity profile of J-type thermocouples across the +55°C to +565°C measurement range. It is not calibrated for K-type or other thermocouple families.
Can AD8496ARMZ measure below 0°C?
Yes, AD8496ARMZ can measure below 0°C when a positive offset voltage is applied to the REF pin or when operated with a negative supply rail. For example, applying +1.25 V to REF on a 5 V single supply shifts the output range to support measurements from −250°C upward. The device's input voltage range extends to −VS − 0.2 V, enabling sub-zero operation with appropriate biasing.
How does AD8496ARMZ implement thermocouple break detection?
AD8496ARMZ uses its PNP-input stage bias current (25–50 nA), which flows out of both −IN and +IN pins. When the thermocouple opens, −IN floats and the bias current pulls it high, causing the output to rail positively. This behavior is confirmed in Figure 6 and requires a 1 MΩ resistor from −IN to ground to establish a defined fault state. No external comparator is needed.
What is the maximum recommended capacitive load for AD8496ARMZ?
AD8496ARMZ remains stable with capacitive loads up to 10,000 pF, as verified in Figure 15 of the datasheet. However, for optimal settling time (<32 μs to 0.1%), loads above 1000 pF increase overshoot and ringing. For high-speed sampling, keep CL ≤ 1000 pF or add a small series resistor (e.g., 10 Ω) between OUT and the load capacitor to dampen resonance.
Does AD8496ARMZ require external components for basic operation?
AD8496ARMZ operates as a standalone thermocouple amplifier with only three external connections required: thermocouple to +IN/−IN, 1 MΩ resistor from −IN to ground (for break detection), and optional REF voltage source. No external gain-setting resistors, cold-junction sensors, or filtering is mandatory-though a low-pass RC filter is recommended in electrically noisy environments per Figure 29.
AD8496ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Thermocouple Amplifier
- Input Type:
- Differential
- Output Type:
- Analog
- Current - Supply:
- 180 µA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8496ARMZ FAQ
1.How can I place an order for AD8496ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8496ARMZ 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 AD8496ARMZ reliable?
The price and inventory of AD8496ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8496ARMZ is usually 5 days.
3.What payment methods are accepted for AD8496ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8496ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8496ARMZ?
AD8496ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8496ARMZ 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 AD8496ARMZ?
For technical support, including AD8496ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8496ARMZ requirements.
6.How does Aetrix verify that AD8496ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8496ARMZ 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 AD8496ARMZ meets industry standards.
7.What is the process for return or replacement of AD8496ARMZ?
All AD8496ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8496ARMZ, 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 AD8496ARMZ part is unused and in its original packaging.
Return procedure for AD8496ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8496ARMZ Tags
-
RE46C100S8TF
Microchip Technology
-
XTR111AIDRCR
Texas Instruments
-
XTR111AIDGQR
Texas Instruments
-
XTR117AIDGKR
Texas Instruments
-
XTR111AIDGQT
Texas Instruments
-
XTR115UA/2K5
Texas Instruments
-
MAX14626ETT+T
Analog Devices Inc./Maxim Integrated
-
XTR116UA/2K5
Texas Instruments
-
XTR115U/2K5
Texas Instruments
-
XTR116U/2K5
Texas Instruments
-
PGA308AIDGSR
Texas Instruments
-
XTR300AIRGWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
