Overview
The OPA317IDBVR, part of the OPA317 series from Texas Instruments, is a low-power, rail-to-rail input and output operational amplifier. This device is designed for precision performance at a competitive price. It operates from a single or dual supply ranging from 1.8 V to 5.5 V, making it suitable for a wide range of general-purpose applications. The OPA317IDBVR features proprietary Zerø-Drift circuitry, which ensures low input offset voltage over time and temperature, as well as reduced 1/f noise component. This operational amplifier is unity-gain stable and free from unexpected output and phase reversal, making it ideal for various analog signal processing tasks.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5 V, TA = 25°C | ±20 | ±90 | ±100 | μV |
| dVOS/dT | TA = –40°C to +125°C | 0.05 | μV/°C | ||
| PSRR | TA = –40°C to +125°C, VS = 1.8 V to 5.5 V | 10 | μV/V | ||
| Input Bias Current (IB) | TA = 25°C | ±155 | ±275 | ±300 | pA |
| Input Offset Current (IOS) | TA = 25°C | ±140 | ±400 | pA | |
| Input Voltage Noise Density (en) | f = 1 kHz | 55 | nV/√Hz | ||
| Common-Mode Voltage Range (VCM) | (V–) – 0.1 to (V+) + 0.1 V | V | |||
| Common-Mode Rejection Ratio (CMRR) | TA = –40°C to +125°C | 95 | 108 | dB |
Key Features
- Rail-to-Rail Input and Output: The OPA317IDBVR offers rail-to-rail input and output swing, significantly increasing the dynamic range, especially in low-supply applications.
- Low Input Offset Voltage: Proprietary Zerø-Drift circuitry ensures low input offset voltage over time and temperature.
- High PSRR: High power-supply rejection ratio (PSRR) reduces the impact of power supply noise on the output.
- Unity-Gain Stable: The device is unity-gain stable and free from unexpected output and phase reversal.
- Low Power Consumption: Operates with low quiescent current, making it suitable for battery-powered devices.
- Wide Operating Voltage Range: Can operate from 1.8 V to 5.5 V, making it versatile for various applications.
Applications
- General-Purpose Amplification: Suitable for a wide range of general-purpose analog signal processing tasks.
- Sampling Analog-to-Digital Converters (ADCs): Ideal for driving sampling ADCs due to its rail-to-rail input and output swing.
- Voltage-to-Current (V-I) Converters: Can be used in high-side V-I converters for precise DC accuracy.
- Low-Side Current Monitoring: Used in low-side current monitoring circuits for accurate current measurement.
- Battery-Powered Devices: Suitable for battery-powered devices due to its low power consumption.
Q & A
- What is the operating voltage range of the OPA317IDBVR?
The OPA317IDBVR operates from 1.8 V to 5.5 V.
- What is the typical input offset voltage of the OPA317IDBVR?
The typical input offset voltage is ±90 μV.
- What is the input bias current of the OPA317IDBVR?
The input bias current is typically ±275 pA.
- Is the OPA317IDBVR unity-gain stable?
Yes, the OPA317IDBVR is unity-gain stable.
- What is the common-mode rejection ratio (CMRR) of the OPA317IDBVR?
The CMRR is typically 108 dB.
- Can the OPA317IDBVR be used in single-supply applications?
Yes, the OPA317IDBVR can be used in virtually any single-supply application due to its rail-to-rail input and output swing.
- What is the maximum input current that can be tolerated by the OPA317IDBVR?
Momentary voltages greater than the power supply can be tolerated if the input current is limited to 10 mA.
- How does the OPA317IDBVR handle power supply noise?
The OPA317IDBVR has a high PSRR, which reduces the impact of power supply noise on the output.
- What are some typical applications of the OPA317IDBVR?
Typical applications include general-purpose amplification, driving sampling ADCs, V-I converters, and low-side current monitoring.
- What precautions should be taken with the power supply for the OPA317IDBVR?
Supply voltages greater than 7 V can permanently damage the device. Bypass capacitors should be placed close to the power-supply pins to reduce errors from noisy or high-impedance power supplies.
