The **ADA4691-2ACBZ-R7** is a high-performance, dual-channel operational amplifier (op-amp) manufactured by Analog Devices. It is specifically designed for low-power, portable applications where space and energy efficiency are critical. --- ## 1. Technical Specifications Below are the primary electrical characteristics of the ADA4691-2: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 2 (Dual) | | **Supply Voltage (Range)** | 2.7V to 5.5V | | **Quiescent Current** | 180 µA per amplifier | | **Gain Bandwidth Product** | 3.5 MHz | | **Slew Rate** | 1.3 V/µs | | **Input Bias Current** | 0.5 pA (Typical) | | **Offset Voltage** | 500 µV (Max) | | **Rail-to-Rail** | Input and Output (RRIO) | --- ## 2. Key Features * **Low Power Consumption:** With only 180 µA per channel, it is ideal for battery-operated devices. * **Small Form Factor:** The "ACBZ" suffix indicates a **WLCSP** (Wafer Level Chip Scale Package), making it extremely small for dense PCB layouts. * **Low Input Bias Current:** The CMOS input stage allows for extremely low bias currents, making it excellent for photodiode amplification or high-impedance sensors. * **Shutdown Mode:** This specific model includes a shutdown pin to further reduce power consumption when the device is not in use. --- ## 3. Package and Ordering Information The suffix codes provide details regarding the physical delivery and packaging: | Code Segment | Meaning | | :--- | :--- | | **ADA4691-2** | Model family and number of channels (2). | | **ACBZ** | Indicates the package type: 10-ball WLCSP. | | **R7** | Indicates the tape and reel size (7-inch reel, typically 3,000 units). | --- ## 4. Typical Applications * **Portable Medical Instrumentation:** ECG/EKG monitors and glucose meters. * **Consumer Electronics:** Smartphone audio, tablets, and wearables. * **Sensor Interfaces:** Signal conditioning for low-current sensors. * **Active Filters:** Low-power filtering for data acquisition systems. --- ## 5. Typical Circuit Configuration Here is a conceptual example of how the ADA4691-2 might be used in a non-inverting buffer configuration: ```text V+ (2.7V - 5.5V) | +---------+ Vin--|+ | | ADA4691 |---- Vout +--|- | | +---------+ | | +-------+ (Feedback Loop) | V- (GND) ```