The **ADR3533WARMZ-R7** is a high-precision, low-power, CMOS voltage reference manufactured by **Analog Devices (ADI)**. It is part of the ADR35xx family, specifically designed for automotive and industrial applications requiring high stability and low noise. --- ### ## Technical Specifications The following table summarizes the key electrical characteristics of the ADR3533: | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 3.3 V | | **Initial Accuracy** | ±0.1% (Max) | | **Temperature Coefficient** | 5 ppm/°C (Grade B), 10 ppm/°C (Grade A) | | **Operating Supply Voltage** | 3.5 V to 5.5 V | | **Quiescent Current** | 100 μA (Max) | | **Load Current Drive** | 10 mA (Source) / 3 mA (Sink) | | **Package Type** | 8-lead MSOP | | **Operating Temperature** | -40°C to +125°C | --- ### ## Key Features The "WARMZ" suffix indicates specific attributes critical for engineering selection: 1. **Automotive Grade:** The **'W'** denotes that this part is qualified for automotive applications (AEC-Q100). 2. **Low Dropout (LDO):** It requires a very small "headroom" (only 200mV above the output voltage) to maintain regulation. 3. **High Stability:** It offers excellent long-term drift performance and thermal hysteresis, ensuring the 3.3V output remains constant over the life of the product. 4. **Low Noise:** Designed to minimize spectral noise, making it ideal for high-resolution Data Converters (ADC/DAC). --- ### ## Pin Configuration (8-Lead MSOP) While the device is in an 8-pin package, several pins are functionally specific: * **$V_{in}$:** Input Voltage Supply. * **$V_{out}$:** Reference Voltage Output (3.3V). * **GND:** Ground Reference. * **NC:** No Internal Connection (usually left floating or grounded for better thermal dissipation). --- ### ## Application Use Cases The ADR3533 is typically found in precision electronic systems such as: * **ADAS Systems:** Providing stable references for automotive sensors. * **Precision Data Acquisition:** Acting as the voltage reference for 16-bit or 24-bit ADCs. * **Battery Monitoring:** Used in EV/HEV battery management systems (BMS). * **Instrumentation:** Portable medical or industrial testing equipment. --- ### ## Part Number Breakdown ```text ADR3533 W A R M Z - R7 | | | | | | | | | | | | | | | | | +-- Tape & Reel (7-inch) | | | | | | | +----- RoHS Compliant | | | | | | +------- MSOP Package | | | | | +--------- Operating Temp (-40 to +125°C) | | | | +----------- Reliability Grade | | | +------------- Automotive Qualified | | +--------------- Voltage Option (33 = 3.3V) | +------------------ Product Series (Low Power CMOS) +--------------------- Analog Devices Prefix ```