Overview
The OP747AR is a precision quad rail-to-rail output operational amplifier produced by Analog Devices Inc. This amplifier is designed for micropower operation and features a single-supply capability, making it versatile for various applications. It offers improved performance over industry standards like the OP07, particularly with its ability to operate on a single supply as low as 3 V and its compatibility with ±15 V supplies. The OP747AR is part of the OP777, OP727, and OP747 family, which are known for their high precision and low power consumption.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | +25°C < T_A < +85°C | 30 | - | 160 | μV |
| Offset Voltage | VOS | –40°C < T_A < +85°C | 50 | - | 300 | μV |
| Input Bias Current | IB | –40°C < T_A < +85°C | 5 | - | 10 | nA |
| Input Offset Current | IOS | –40°C < T_A < +85°C | 0.1 | - | 2 | nA |
| Input Voltage Range | - | -15 V to +14 V | - | - | - | V |
| Common-Mode Rejection Ratio | CMRR | V_CM = –15 V to +14 V | 110 | - | 120 | dB |
| Large Signal Voltage Gain | AVO | R_L = 10 kΩ, V_O = –14.5 V to +14.5 V | 1,000 | - | 2,500 | V/mV |
| Output Voltage High | VOH | I_L = 1 mA, –40°C to +85°C | +14.9 | - | +14.94 | V |
| Output Voltage Low | VOL | I_L = 1 mA, –40°C to +85°C | 126 | - | 140 | mV |
| Supply Current/Amplifier | ISY | V_O = 0 V, –40°C < T_A < +85°C | 235 | - | 320 | μA |
Key Features
- Precision Operation: Low offset voltage (30 μV to 160 μV) and low input bias current (5 nA to 10 nA).
- Single-Supply and Dual-Supply Capability: Operates on a single supply from 3 V to 30 V and dual supplies from ±15 V.
- Low Power Consumption: Supply current less than 300 μA per amplifier at 5 V.
- Rail-to-Rail Output: Output voltage range extends to the supply rails.
- Stability with Capacitive Loads: Stable with capacitive loads of over 500 pF.
- No Phase Reversal: Protected inputs allow signal levels several volts above the positive supply without phase reversal.
Applications
- Current Sensing (Shunt): Suitable for current sensing applications due to its precision and stability.
- Line or Battery-Powered Instrumentation: Ideal for both line-powered and portable instrumentation.
- Remote Sensor Signal Conditioning: Used in remote sensor applications requiring precision signal conditioning.
- Precision Filters: Can be used in precision filter circuits.
Q & A
- What is the typical offset voltage of the OP747AR?
The typical offset voltage of the OP747AR is between 30 μV and 160 μV. - What is the input bias current range of the OP747AR?
The input bias current range is from 5 nA to 10 nA. - Can the OP747AR operate on a single supply?
Yes, the OP747AR can operate on a single supply from 3 V to 30 V. - What is the common-mode rejection ratio (CMRR) of the OP747AR?
The CMRR is between 110 dB and 120 dB. - Is the OP747AR stable with capacitive loads?
Yes, the OP747AR is stable with capacitive loads of over 500 pF. - What are the typical supply current requirements for the OP747AR?
The supply current is less than 300 μA per amplifier at 5 V. - What are the output voltage ranges for the OP747AR?
The output voltage ranges from –14.9 V to +14.94 V for a dual supply, and it is rail-to-rail for single supply operation. - What are some common applications of the OP747AR?
Common applications include current sensing, line or battery-powered instrumentation, remote sensor signal conditioning, and precision filters. - What package options are available for the OP747AR?
The OP747AR is available in 14-lead TSSOP and narrow 14-lead SO packages. - What is the operating temperature range for the OP747AR?
The OP747AR is specified over the extended industrial temperature range of –40°C to +85°C.
