The **AD633JRZ-R7** is a precision integrated circuit (IC) categorized as a **Low-Cost Analog Multiplier**. It is manufactured by Analog Devices and is widely used in signal processing for its ability to perform multiplication, division, squaring, and modulation with minimal external components. --- ### 1. Key Technical Specifications The "JRZ-R7" suffix indicates the package type (SOIC-8), Lead-Free compliance (Z), and Tape & Reel packaging (R7). | Parameter | Specification | | :--- | :--- | | **Function** | 4-Quadrant Analog Multiplier | | **Number of Inputs** | 4 (X1, X2, Y1, Y2) + Summing Input (Z) | | **Supply Voltage (Vs)** | ±8V to ±18V | | **Bandwidth** | 1 MHz | | **Accuracy** | 2% of Full Scale | | **Package** | 8-Lead SOIC (Small Outline Integrated Circuit) | | **Operating Temp** | 0°C to 70°C | --- ### 2. Functional Architecture The AD633 operates based on the following transfer function: `W = [(X1 - X2)(Y1 - Y2) / 10V] + Z` * **X & Y Inputs:** These are high-impedance differential inputs. * **The Scaling Factor (10V):** The internal voltage reference sets the denominator to 10V, meaning if both X and Y are 10V, the output is 10V. * **Z Input:** This allows the user to add an external voltage to the product, useful for biasing or summing signals. * **W Output:** A low-impedance voltage output. --- ### 3. Pin Configuration | Pin # | Name | Description | | :--- | :--- | :--- | | 1 | **X1** | Multiplicand Non-inverting Input | | 2 | **X2** | Multiplicand Inverting Input | | 3 | **Y1** | Multiplier Non-inverting Input | | 4 | **Y2** | Multiplier Inverting Input | | 5 | **-Vs** | Negative Supply Rail | | 6 | **Z** | Summing Input | | 7 | **W** | Product Output | | 8 | **+Vs** | Positive Supply Rail | --- ### 4. Common Applications * **Modulation/Demodulation:** Used in AM (Amplitude Modulation) and DSB-SC signal generation. * **Voltage Controlled Amplifiers (VCA):** Controlling signal gain via a DC voltage. * **Frequency Doubling:** If the same sine wave is fed into both X and Y inputs, the output is a squared wave (doubled frequency). * **Power Measurement:** Multiplying voltage and current signals to determine instantaneous power. * **Filters:** Used in voltage-controlled state-variable filters. --- ### 5. Benefits of the AD633 1. **Ease of Use:** Unlike discrete multiplier circuits, it requires no external resistors or biasing to achieve its rated 2% accuracy. 2. **Versatility:** The differential inputs allow for subtraction of signals directly at the input stage. 3. **Stability:** The internal buried Zener reference ensures the scale factor remains stable over temperature changes.