Overview
The AD8496ARMZ-R7 is a precision instrumentation amplifier with a thermocouple cold junction compensator, designed and manufactured by Analog Devices Inc. This device is part of the AD8494/AD8495/AD8496/AD8497 family and is specifically precalibrated for J-type (iron-constantan) thermocouples. It combines an ice point reference with a precalibrated amplifier to produce a high-level output (5 mV/°C) directly from the thermocouple signal. The AD8496ARMZ-R7 can be used as a standalone thermometer or as a switched output setpoint controller, offering flexibility in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 36 | V |
| Output Voltage Range | -VS + 0.025 to +VS - 0.1 | V |
| Input Voltage Range | -VS - 0.2 to +VS - 1.6 | V |
| Overvoltage Range | +VS - 25 to -VS + 25 | V |
| Input Bias Current | 25 to 50 | nA |
| Input Offset Current | 1.5 to 0.5 | nA |
| Common-Mode Rejection | 1 to 0.3 | °C/V |
| Power Supply Rejection | 0.5 | °C/V |
| Voltage Noise (0.1 Hz to 10 Hz) | 0.8 | μV p-p |
| Voltage Noise Density (1 kHz) | 32 | nV/√Hz |
| Current Noise Density (1 kHz) | 100 | fA/√Hz |
| Reference Input Resistance | 60 | kΩ |
| Reference Input Current | 25 | μA |
| Output Short-Circuit Current | 7 | mA |
| -3 dB Bandwidth | 31 | kHz |
| Settling Time to 0.1% (4 V output step) | 36 | μs |
| Package Type | 8-Lead MSOP |
Key Features
- Complete, precision laser wafer trimmed thermocouple signal conditioning system in a single IC package.
- Flexible pinout allows operation as a setpoint controller or as a standalone Celsius thermometer.
- Rugged inputs withstand 4 kV ESD and provide overvoltage protection (OVP) up to VS ± 25 V.
- Differential inputs reject common-mode noise on the thermocouple leads.
- Reference pin voltage can be offset to measure 0°C on single supplies.
- Available in a small, 8-lead MSOP package that is fully RoHS compliant.
- High impedance differential input and internal cold junction compensation.
- Low cost and easy to use, pretrimmed for J-type thermocouples.
Applications
- Temperature measurement in industrial systems.
- Thermocouple-based temperature sensing in various environments.
- Setpoint control in temperature regulation systems.
- Ambient temperature sensing.
- Measuring negative temperatures by offsetting the reference input.
Q & A
- What is the AD8496ARMZ-R7 used for?
The AD8496ARMZ-R7 is used for precision thermocouple signal conditioning and can be used as a standalone thermometer or as a setpoint controller.
- What type of thermocouples is the AD8496ARMZ-R7 precalibrated for?
The AD8496ARMZ-R7 is precalibrated for J-type (iron-constantan) thermocouples.
- What is the output voltage range of the AD8496ARMZ-R7?
The output voltage range is from -VS + 0.025 to +VS - 0.1 volts.
- What is the supply voltage range for the AD8496ARMZ-R7?
The supply voltage range is from 2.7 to 36 volts.
- How does the AD8496ARMZ-R7 handle common-mode noise?
The device has differential inputs that reject common-mode noise on the thermocouple leads.
- What is the package type of the AD8496ARMZ-R7?
The AD8496ARMZ-R7 is available in an 8-lead MSOP package.
- Is the AD8496ARMZ-R7 RoHS compliant?
- What is the typical settling time of the AD8496ARMZ-R7?
The settling time to 0.1% for a 4 V output step is 36 microseconds.
- Can the AD8496ARMZ-R7 measure negative temperatures?
- What is the -3 dB bandwidth of the AD8496ARMZ-R7?
The -3 dB bandwidth is 31 kHz.
