Overview
The AD622AR-REEL7, produced by Analog Devices Inc., is a low-cost instrumentation amplifier designed for a wide range of applications requiring precision and reliability. This amplifier is part of the AD622 series, known for its moderately accurate performance and ease of use. It features a traditional pin configuration that allows for the setting of any gain between 2 and 1000 using just one external resistor. For a gain of 1, no external resistor is required. The AD622AR-REEL7 is packaged in an 8-lead SOIC (Small Outline IC) and is available on a 7-inch reel, making it convenient for high-volume production.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | ±2.6 | ±18 | V | ||
| Internal Power Dissipation | 650 | mW | |||
| Input Voltage (Common Mode) | ±VS | V | |||
| Differential Input Voltage | ±25 | V | |||
| Output Short Circuit Duration | Indefinite | ||||
| Operating Temperature Range | −40 | +85 | °C | ||
| Small Signal –3 dB Bandwidth (G = 1) | 1000 | kHz | |||
| Small Signal –3 dB Bandwidth (G = 10) | 800 | kHz | |||
| Small Signal –3 dB Bandwidth (G = 100) | 120 | kHz | |||
| Small Signal –3 dB Bandwidth (G = 1000) | 12 | kHz | |||
| Slew Rate | 1.2 | V/µs | |||
| Settling Time to 0.1% (10 V step, G = 1 to 100) | 10 | µs | |||
| Common-Mode Rejection Ratio (G = 1) | 66 | 78 | dB | ||
| Common-Mode Rejection Ratio (G = 10) | 86 | 98 | dB | ||
| Common-Mode Rejection Ratio (G = 100) | 103 | 118 | dB | ||
| Common-Mode Rejection Ratio (G = 1000) | 103 | 118 | dB |
Key Features
- Single External Resistor Gain Setting: Allows for gain settings between 2 and 1000 with just one external resistor. No external resistor is needed for a gain of 1.
- Precision Laser-Trimmed Resistors: Provides superior linearity and common-mode rejection.
- High Common-Mode Rejection Ratio (CMRR): Up to 118 dB at higher gains, ensuring minimal interference from common-mode signals.
- Wide Supply Voltage Range: Operates with supply voltages from ±2.6 V to ±18 V.
- Input Protection: Safely withstands input overloads of up to ±25 V or ±60 mA.
- Reference Terminal: Allows for injecting a precise offset to the output, useful when the load does not share a precise ground with the rest of the system.
- Compact Packaging: Available in 8-lead SOIC packaging, suitable for high-volume production and space-constrained applications.
Applications
- Data Acquisition Systems: Ideal for precision data acquisition due to its high accuracy and linearity.
- Industrial Process Controls: Used in various industrial control systems where precise signal amplification is required.
- Medical Instrumentation: Suitable for medical devices such as ECG and other diagnostic equipment.
- Transducer Interfaces: Often used to amplify signals from transducers in various measurement systems.
- Weigh Scales and Measurement Systems: Provides accurate amplification of signals in weighing and measurement applications.
Q & A
- What is the operating temperature range of the AD622AR-REEL7?
The operating temperature range is from −40°C to +85°C.
- How is the gain set on the AD622AR-REEL7?
The gain is set using a single external resistor, allowing gains from 2 to 1000. No external resistor is needed for a gain of 1.
- What is the common-mode rejection ratio (CMRR) of the AD622AR-REEL7?
The CMRR can be up to 118 dB at higher gains.
- What is the maximum differential input voltage the AD622AR-REEL7 can handle?
The maximum differential input voltage is ±25 V.
- How does the reference terminal of the AD622AR-REEL7 function?
The reference terminal allows for injecting a precise offset to the output, useful when the load does not share a precise ground with the rest of the system.
- What is the slew rate of the AD622AR-REEL7?
The slew rate is 1.2 V/µs.
- What is the settling time to 0.1% for a 10 V step?
The settling time is 10 µs for gains from 1 to 100.
- Can the AD622AR-REEL7 withstand input overloads?
Yes, it can safely withstand input overloads of up to ±25 V or ±60 mA.
- What are the typical applications of the AD622AR-REEL7?
It is used in data acquisition systems, industrial process controls, medical instrumentation, transducer interfaces, and weigh scales.
- What is the packaging of the AD622AR-REEL7?
It is packaged in an 8-lead SOIC and available on a 7-inch reel.
