Overview
The AD626AR-REEL, produced by Analog Devices Inc., is a low-cost, single-supply differential amplifier designed for amplifying and low-pass filtering small differential voltages from sources with large common-mode voltages. This amplifier is particularly useful in applications where precise amplification of differential signals is required in the presence of significant common-mode noise. The AD626 operates from either a single supply of +2.4 V to +10 V or dual supplies of ±1.2 V to ±6 V, making it versatile for various system designs. It features high common-mode rejection ratio (CMRR) and includes input protection and RFI filters, enhancing its reliability and performance in noisy environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | +2.4 V to +10 V (Single Supply), ±1.2 V to ±6 V (Dual Supply) | V |
| Common Mode Rejection Ratio (CMRR) | 90 dB (Typical) | dB |
| Input Offset Voltage | 1.9 to 2.5 mV | mV |
| Input Resistance | 200 kΩ | Ω |
| Gain Range | 10 to 100 | - |
| Bandwidth | 100 kHz | kHz |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 8-lead SOIC | - |
| Input Protection | Up to 50 V continuous overload | V |
| RFI Filters | Included | - |
Key Features
- High Common Mode Rejection Ratio (CMRR): The AD626 features a CMRR of 90 dB, ensuring accurate amplification of differential signals in the presence of large common-mode voltages.
- Input Protection and RFI Filters: The amplifier includes input protection against continuous overloads up to 50 V and RFI filters to minimize the effect of spurious RF signals.
- Low-Pass Filter Capability: The AD626 allows for low-pass filtering by connecting a capacitor between the filter pin and analog ground.
- Adjustable Gain: The gain can be set between 10 and 100 using external resistors, with a preset gain of 10 and an option for a gain of 100 by connecting the G = 100 pin to analog ground.
- Wide Operating Temperature Range: The AD626 operates over the industrial temperature range of -40°C to +85°C.
Applications
- Current Sensing: Ideal for current sensing applications where differential signals need to be amplified accurately.
- Pressure Transducers and Strain Gages: Suitable for amplifying signals from pressure transducers and strain gages.
- Position Indicators: Used in position sensing and indication systems.
- Low-Level Signal Sources: Amplifies small differential voltages from various low-level signal sources.
Q & A
- What is the supply voltage range for the AD626AR-REEL?
The AD626AR-REEL can operate from a single supply of +2.4 V to +10 V or dual supplies of ±1.2 V to ±6 V.
- What is the common-mode rejection ratio (CMRR) of the AD626AR-REEL?
The CMRR of the AD626AR-REEL is 90 dB (typical).
- How is the gain of the AD626AR-REEL adjusted?
The gain can be adjusted between 10 and 100 using external resistors. A gain of 100 is also available by connecting the G = 100 pin to analog ground.
- What is the input protection capability of the AD626AR-REEL?
The AD626AR-REEL has input protection against continuous overloads up to 50 V.
- Does the AD626AR-REEL include RFI filters?
Yes, the AD626AR-REEL includes RFI filters to minimize the effect of spurious RF signals.
- What is the operating temperature range of the AD626AR-REEL?
The AD626AR-REEL operates over the industrial temperature range of -40°C to +85°C.
- What package types are available for the AD626AR-REEL?
The AD626AR-REEL is available in an 8-lead SOIC package.
- What is the bandwidth of the AD626AR-REEL?
The bandwidth of the AD626AR-REEL is 100 kHz.
- Can the AD626AR-REEL be used for low-pass filtering?
Yes, the AD626AR-REEL allows for low-pass filtering by connecting a capacitor between the filter pin and analog ground.
- What are some common applications of the AD626AR-REEL?
The AD626AR-REEL is commonly used in current sensing, pressure transducers, strain gages, and other low-level signal sources.
