The **REF-01** (often prefixed as AMSREF-01C when manufactured by Advanced Monolithic Systems) is a precision **Voltage Reference** integrated circuit. It is designed to provide a stable, accurate 10.0V output regardless of variations in temperature or input voltage. --- ### ## Technical Specifications The "C" suffix usually denotes the commercial temperature grade version of the component. | Parameter | Typical Value | | :--- | :--- | | **Output Voltage** | +10.0 V | | **Input Voltage Range** | 12V to 40V | | **Output Adjustment Range** | ±3.0% (via Trim pin) | | **Temperature Coefficient** | 8.5 ppm/°C to 25 ppm/°C | | **Quiescent Current** | 1.0 mA | | **Output Noise** | 20 µV p-p (0.1Hz to 10Hz) | | **Package Options** | SOIC-8, PDIP-8, TO-99 | --- ### ## Pin Configuration (8-Pin DIP/SOIC) The device follows a standard industry pinout for the REF-01 family: | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | NC | No Connection | | 2 | VIN | Input Supply Voltage (+12V to +40V) | | 3 | TEMP | Temperature monitoring output | | 4 | GND | Ground | | 5 | TRIM | Fine-tuning of output voltage | | 6 | VOUT | +10.0V Precision Output | | 7 | NC | No Connection | | 8 | NC | No Connection | --- ### ## Key Features & Internal Logic 1. **Bandgap Reference:** It utilizes a stable bandgap circuit to ensure the 10V output remains consistent even as the silicon temperature changes. 2. **Short-Circuit Protection:** The output is protected against accidental shorts to ground or the supply rail. 3. **Trim Capability:** By connecting a potentiometer to Pin 5, the user can calibrate the output to exactly 10.000V, compensating for system-level tolerances. 4. **Temp Output:** Pin 3 provides a voltage proportional to the absolute temperature, which can be used for temperature sensing applications. --- ### ## Common Applications * **A/D and D/A Converters:** Providing the "yardstick" for high-resolution data conversion. * **Precision Current Sources:** Used in conjunction with an Op-Amp to create stable currents. * **Digital Voltmeters:** Acting as the internal reference for measurement accuracy. * **Calibration Standards:** Used in portable equipment that requires a fixed reference point. --- ### ## Basic Connection Diagram ```text +12V to +40V | +------|------+ | [VIN] | | | +10V Output | AMSREF- |----------o | 01C | | | | [0.1uF Capacitor] | [GND] | | +------|------+ | | --- --- GND GND ```