The **AD8236ARMZ-R7** is a high-performance, low-power instrumentation amplifier manufactured by Analog Devices. It is specifically designed for battery-powered medical and portable industrial applications where power consumption and precision are critical. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the AD8236: | Parameter | Specification | | :--- | :--- | | **Architecture** | 3-Op Amp Instrumentation Amplifier | | **Supply Voltage** | 1.8 V to 5.5 V | | **Supply Current** | 40 μA (Maximum) | | **Gain Range** | 1 to 1000 (Set by one external resistor) | | **CMRR** | 110 dB (at G = 100) | | **Input Offset Voltage** | 100 μV (Maximum) | | **Package Type** | 8-lead MSOP (ARMZ prefix) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Core Features * **Rail-to-Rail Output:** The output can swing very close to the supply rails, maximizing the dynamic range even at low 1.8V operations. * **Micropower Consumption:** Consuming only 40 μA, it is ideal for wearable devices and long-term battery monitoring. * **High CMRR:** The Common-Mode Rejection Ratio (CMRR) ensures that noise common to both input lines (like 50/60 Hz interference) is effectively cancelled out. * **Simplified Gain Setting:** Users can define the gain ($G$) using a single external resistor ($R_G$) according to the formula: `G = 1 + (420 kΩ / Rg)` --- ### 3. Pin Configuration The AD8236ARMZ-R7 typically uses an 8-lead MSOP package. | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | -IN | Inverting Input | | 2 | RG | Gain Resistor Pin | | 3 | RG | Gain Resistor Pin | | 4 | +IN | Non-inverting Input | | 5 | -Vs | Negative Supply | | 6 | REF | Reference Pin (Sets output offset) | | 7 | Vout | Output | | 8 | +Vs | Positive Supply | --- ### 4. Typical Applications The device is widely used in precision environments: * **Medical Instrumentation:** ECG/EKG monitors, EEG, and blood pressure monitors. * **Portable Consumer Electronics:** Fitness heart rate trackers. * **Industrial Sensing:** Pressure sensors and weigh scales. * **Data Acquisition:** High-impedance sensor interfacing for microcontrollers. --- ### 5. Ordering Information Decoded The suffix **ARMZ-R7** provides specific details about the physical delivery: * **A:** Performance grade. * **RM:** MSOP (Mini Small Outline Package). * **Z:** RoHS compliant (Lead-free). * **R7:** 7-inch reel (Tape and Reel packaging for automated assembly).