The **ADR3412ARJZ-R7** is a high-precision, low-power, low-noise CMOS voltage reference manufactured by Analog Devices. It is specifically designed for applications requiring high stability in a small footprint. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the ADR3412: | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 1.200 V | | **Input Voltage Range** | 2.3 V to 5.5 V | | **Initial Accuracy** | ±0.1% (Max) | | **Temperature Coefficient** | 8 ppm/°C (Max) | | **Output Current Drive** | +10 mA / -3 mA | | **Quiescent Current** | 100 µA (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOT-23-6 (Suffix: RJZ) | --- ### 2. Core Functional Features * **Low Drift:** With a maximum temperature coefficient of 8 ppm/°C, it ensures the output remains stable despite fluctuations in ambient temperature. * **Low Noise:** It features very low noise (typically $7 \mu V_{p-p}$ from 0.1 Hz to 10 Hz), which is critical for high-resolution data converters (12-bit to 16-bit ADCs). * **High Output Drive:** Unlike many references that require a buffer, the ADR3412 can source up to 10 mA, allowing it to drive heavy loads or multiple sensor bridges directly. * **No External Capacitor Required:** It is stable without an external output capacitor, though one can be added to improve transient response. --- ### 3. Pin Configuration (SOT-23-6) | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | **TP** | Test Pin (Leave unconnected or tie to GND) | | 2 | **GND** | Ground | | 3 | **NC** | No Connect | | 4 | **$V_{in}$** | Input Voltage Supply | | 5 | **NC** | No Connect | | 6 | **$V_{out}$** | Reference Output Voltage | --- ### 4. Typical Application Circuit To implement this part in a design, a simple decoupling capacitor on the input is recommended: ```text [Input 2.3V-5.5V] ----+---- [Pin 4: Vin] | [0.1uF Cap] | [GND] ---- [Pin 2: GND] [Pin 6: Vout] ----> [Reference to ADC/DAC] ``` --- ### 5. Part Number Breakdown: ADR3412ARJZ-R7 * **ADR34:** Product Series (Micropower, Precision CMOS Voltage Reference). * **12:** Indicates the Output Voltage (1.2V). * **A:** Grade (Initial accuracy and temperature coefficient spec). * **RJZ:** Package Code (SOT-23 6-lead). * **R7:** Tape and Reel size (7-inch reel, typically 3,000 pieces).