### ADA4004-4ACPZ-R2: Electronic Specifications and Overview The **ADA4004-4ACPZ-R2** is a high-precision, quad-channel, ultra-low noise operational amplifier (op-amp) manufactured by Analog Devices. It is designed for applications requiring high accuracy and low noise in a compact form factor. --- ### 1. Key Technical Specifications Below are the critical electrical parameters for the ADA4004-4ACPZ-R2: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 4 (Quad) | | **Input Noise Voltage** | 1.8 nV/√Hz @ 1 kHz | | **Offset Voltage (Max)** | 140 µV | | **Offset Drift** | 0.7 µV/°C | | **Bandwidth (Gain-Bandwidth Product)** | 12 MHz | | **Slew Rate** | 2.7 V/µs | | **Supply Voltage Range** | ±5 V to ±15 V | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | LFCSP-16 (Lead Frame Chip Scale Package) | --- ### 2. Core Features * **Ultra-Low Noise:** The 1.8 nV/√Hz density makes it ideal for medical instrumentation and high-resolution data acquisition. * **High Precision:** Low offset voltage and minimal drift ensure accuracy over time and temperature variations. * **Low Power Consumption:** Despite its high speed and low noise, it maintains a low supply current (approx. 2 mA per amplifier). * **Unity-Gain Stable:** It can be used in buffer configurations without oscillation. --- ### 3. Pin Configuration (LFCSP-16) The "ACPZ" suffix denotes the 16-lead LFCSP package. The layout is designed for thermal efficiency and high-density PCB mounting: 1. **Inputs (+IN / -IN):** High-impedance differential inputs for each of the four op-amps. 2. **Outputs (OUT):** Low-impedance outputs capable of driving capacitive loads. 3. **Power Supplies (V+ / V-):** Dual supply rails (typically ±15V for maximum dynamic range). 4. **Exposed Pad (EP):** The bottom pad should generally be soldered to the V- plane for thermal dissipation and electrical stability. --- ### 4. Common Applications * **Precision Filters:** Used in active filters where low noise is critical. * **Medical Instrumentation:** ECG/EKG monitors and diagnostic equipment. * **Audio Preamplifiers:** High-fidelity audio signal processing. * **Sensor Interfaces:** Amplifying small signals from strain gauges or thermocouples. --- ### 5. Part Number Breakdown * **ADA4004:** The model series (Precision, Low Noise Op-Amp). * **-4:** Indicates the number of channels (Quad). * **ACPZ:** **A** (Industrial Temp), **CP** (LFCSP Package), **Z** (RoHS Compliant). * **-R2:** Refers to the packaging format (7-inch reel containing 250 units).