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Series Information for AD8494ARMZ - Analog Devices


  • feature
    Low cost and easy to use Pretrimmed for J or K type thermocouples Internal cold junction compensation High impedance differential input Standalone 5 mV/u00b0C thermometer Reference pin allows offset adjustment Thermocouple break detection Laser wafer trimmed to 1u00b0C initial accuracy and 0.025u00b0C/u00b0C ambient temperature rejection Low power: <1 mW at VS = 5 V Wide power supply range Single supply: 2.7 V to 36 V Dual supply: u00b12.7 V to u00b118 V Small, 8-lead MSOP



The AD8494/AD8495/AD8496/AD8497 are precision instrumentation amplifiers with thermocouple cold junction compensators on an integrated circuit. They produce a high level (5 mV/°C) output directly from a thermocouple signal by combining an ice point reference with a precalibrated amplifier. They can be used as standalone thermometers or as switched output setpoint controllers using either a fixed or remote setpoint control. The AD8494/AD8495/AD8496/AD8497 can be powered from a single-ended supply (less than 3 V) and can measure temperatures below 0°C by offsetting the reference input. To minimize self- heating, an unloaded AD849x typically operates with a total supply current of 180 μA, but it is also capable of delivering in excess of ±5 mA to a load. The AD8494 and AD8496 are precalibrated by laser wafer trimming to match the characteristics of J type (iron-constantan) thermocouples; the AD8495 and AD8497 are laser trimmed to match the characteristics of K type (chromel-alumel) thermo- couples. See Table 1 for the optimized ambient temperature range of each part. The AD8494/AD8495/AD8496/AD8497 allow a wide variety of supply voltages. With a 5 V single supply, the 5 mV/°C output allows the devices to cover nearly 1000 degrees of a thermo- couple’s temperature range. The AD8494/AD8495/AD8496/AD8497 work with 3 V supplies, allowing them to interface directly to lower supply ADCs. They can also work with supplies as large as 36 V in industrial systems that require a wide common-mode input range.


IC Function:
Thermocouple Cold Junction Compensator
Supply Voltage Min:
Supply Voltage Max:
IC Package Type:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualification Standard:
RoHS Phthalates Compliant:
MSL 1 - Unlimited
No SVHC (07-Jul-2017)

Alternate Descriptions

RS Components
Analog Devices, AD8494ARMZ
Newark Electronics
AMP W/ THERMOCOUPLE COMPENSATOR, MSOP-8; IC Function:Thermocouple Cold Junction Compensator; Supply Voltage Min:2.7V; Supply Voltage Max:36V; IC Package Type:MSOP; No. of Pins:8Pins; Operating Temperature Min:-40°C; Operating RoHS Compliant: Yes
Transfer Multisort Elektronik
Temperature converter; J-type thermocouple amplifier; -35÷95°C
Integrated circuits from leading manufacturers. Please read our extensive documentation, which is free to download.
RS Components UK
Analog Devices, AD8494ARMZ
RS Components DE
Instrumentenverstärker AD8494ARMZ 2,7 → 36 V 30kHz, MSOP 8-Pin Stromversorgungs-Typ : Dual, Single Montage-Typ : SMD Versorgungsspannung bipolar typ. : ±2.7 → ±18V Betriebstemperatur min. : -40 °C Betriebstemperatur max. : +125 °C Eingangswiderstand max. : 60kΩ Versorgungsstrom max. : 250 μA Abmessungen : 3.2 x 3.2 x 0.95mm Länge : 3.2mm, Analog Devices
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Analog Devices, AD8494ARMZ
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Analog Devices, AD8494ARMZ