Overview
The AD8496CRMZ-R7, produced by Analog Devices Inc., is a precision instrumentation amplifier with a thermocouple cold junction compensator integrated into a single IC package. This device is specifically precalibrated for J-type (iron-constantan) thermocouples and is designed to provide a high-level output directly from the thermocouple signal. It combines an ice point reference with a precalibrated amplifier, allowing it to be used as a standalone thermometer or as a switched output setpoint controller.
The AD8496CRMZ-R7 is known for its flexibility in operating with a wide range of supply voltages, from as low as 2.7 V to as high as 36 V, making it suitable for various applications including industrial systems. It is also RoHS compliant and comes in an 8-lead MSOP package.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range (Single Supply) | 2.7 | 36 | V | |
| Operating Voltage Range (Dual Supply) | ±2.7 | ±18 | V | |
| Input Voltage Range | -VS - 0.2 | +VS - 1.6 | V | |
| Overvoltage Range | -VS + 25 | +VS - 25 | V | |
| Input Bias Current | 25 | 50 | nA | |
| Output Voltage Range | -VS + 0.025 | +VS - 0.1 | V | |
| Short-Circuit Current | 7 | mA | ||
| -3 dB Bandwidth | 31 | kHz | ||
| Settling Time to 0.1% (4 V output step) | 32 | μs | ||
| Quiescent Current | 180 | 250 | μA | |
| Temperature Range (TA) | -40 | 125 | °C |
Key Features
- Precision Instrumentation Amplifier: The AD8496CRMZ-R7 is a precision instrumentation amplifier with a thermocouple cold junction compensator, providing a high-level output directly from the thermocouple signal.
- Flexible Supply Voltage: Operates with a wide range of supply voltages from 2.7 V to 36 V, making it suitable for various applications.
- High Impedance Differential Input: Rugged inputs withstand 4 kV ESD and provide overvoltage protection up to VS ± 25 V.
- Internal Cold Junction Compensation: Precalibrated for J-type thermocouples, allowing for accurate temperature measurements.
- Low Power Consumption: Typically operates with a total supply current of 180 μA to minimize self-heating.
- Compact Package: Available in an 8-lead MSOP package that is fully RoHS compliant.
- Differential Inputs: Reject common-mode noise on the thermocouple leads, enhancing signal integrity.
- Reference Pin Voltage Offset: Allows measurement of 0°C on single supplies by offsetting the reference input.
Applications
- Industrial Temperature Measurement: Suitable for industrial systems requiring a wide common-mode input range and high accuracy.
- Standalone Thermometers: Can be used as standalone thermometers due to its precalibrated output for J-type thermocouples.
- Setpoint Controllers: Can be configured as switched output setpoint controllers using either a fixed or remote setpoint control.
- Low-Power Systems: Ideal for systems requiring low power consumption, such as battery-powered devices.
- Automotive and Aerospace: Suitable for applications in automotive and aerospace industries where precision and reliability are critical.
Q & A
- What type of thermocouple is the AD8496CRMZ-R7 precalibrated for?
The AD8496CRMZ-R7 is precalibrated for J-type (iron-constantan) thermocouples.
- What is the operating voltage range of the AD8496CRMZ-R7?
The AD8496CRMZ-R7 can operate with a single supply voltage ranging from 2.7 V to 36 V.
- What is the typical quiescent current of the AD8496CRMZ-R7?
The typical quiescent current is 180 μA.
- What is the -3 dB bandwidth of the AD8496CRMZ-R7?
The -3 dB bandwidth is 31 kHz.
- How does the AD8496CRMZ-R7 protect against overvoltage?
The device provides overvoltage protection up to VS ± 25 V.
- What is the settling time to 0.1% for a 4 V output step?
The settling time is 32 μs.
- Is the AD8496CRMZ-R7 RoHS compliant?
Yes, the AD8496CRMZ-R7 is fully RoHS compliant.
- What package type is the AD8496CRMZ-R7 available in?
The device is available in an 8-lead MSOP package.
- How does the AD8496CRMZ-R7 reject common-mode noise?
The device has differential inputs that reject common-mode noise on the thermocouple leads.
- Can the AD8496CRMZ-R7 be used as a standalone thermometer?
Yes, it can be used as a standalone thermometer due to its precalibrated output for J-type thermocouples.
