### Overview: AD8226BRMZ-R7 The **AD8226BRMZ-R7** is a high-performance, low-power instrumentation amplifier manufactured by Analog Devices. It is designed to extract small differential signals in the presence of large common-mode voltages. --- ### Technical Specifications The following table highlights the primary electrical characteristics of the AD8226BRMZ-R7: | Parameter | Value / Range | | :--- | :--- | | **Architecture** | 3-Op Amp Instrumentation Amplifier | | **Supply Voltage (Single)** | 2.2 V to 36 V | | **Supply Voltage (Dual)** | ±1.35 V to ±18 V | | **Gain Range** | 1 to 1000 (Set by a single resistor $R_G$) | | **Quiescent Current** | 350 μA (Maximum) | | **Input Offset Voltage** | 50 μV (Maximum, B-Grade) | | **CMRR (Gain = 10)** | 90 dB (Minimum) | | **Package Type** | 8-Lead MSOP (RM-8) | --- ### Key Features and Electronic Components #### 1. Gain Programming The device uses a single external resistor ($R_G$) to set the gain. This simplifies the design process compared to discrete op-amp circuits. * **Formula:** $G = 1 + \frac{49.4\text{ k}\Omega}{R_G}$ #### 2. Rail-to-Rail Output The output stage is designed to swing close to the supply rails, maximizing the dynamic range, which is critical for low-voltage, battery-powered applications. #### 3. Wide Input Range The AD8226 can handle input voltages that go below the negative supply (down to $V- - 0.1\text{V}$), making it ideal for single-supply operation where the signal might be ground-referenced. #### 4. Robust Protection The inputs include internal ESD protection and can withstand voltages up to 40V from the opposite supply rail without damage. --- ### Typical Application Circuit To implement a basic gain stage, the connections are typically made as follows: ```text +Vs (Pin 7) | +-----------+ | | In+ (3) | | (6) Out --------| AD8226 |--------> In- (2) | | (5) Ref (Usually GND) --------| | +-----------+ | | | (1)Rg (8)Rg (4) -Vs |_____| | External Resistor ``` ### Ordering Information Detail The suffix **BRMZ-R7** provides specific information about the part: * **B**: Performance Grade (Higher precision than 'A' grade). * **RM**: MSOP Package. * **Z**: RoHS Compliant (Lead-free). * **R7**: 7-inch Tape and Reel packaging (typically 1,000 units). ---