Overview
The OPA2137UA is a dual-channel, FET-input operational amplifier produced by Burr-Brown, now a part of Texas Instruments. This component is designed for low-cost and miniature applications, offering high performance and versatility. The OPA2137UA is part of the OPA137 series, which includes single, dual, and quad versions, providing maximum design flexibility.
These amplifiers are known for their low input bias current, low quiescent current, and high open-loop gain, making them suitable for a wide range of general-purpose applications. They are easy to use and free from phase inversion and overload problems commonly found in some FET-input amplifiers.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TA = –40°C to +85°C | ±1.5 | ±3 | ±2.5 | mV |
| Input Bias Current (IB) | 5 pA | pA | |||
| Supply Voltage Range | ±2.25V to ±18V (±4.5V to +36V single supply) | V | |||
| Quiescent Current per Channel | 220 µA | µA | |||
| Gain-Bandwidth Product (GBW) | 1 MHz | MHz | |||
| Slew Rate (SR) | G = 1 | 3.5 V/µs | V/µs | ||
| Settling Time (0.1%, 10V Step, CL = 100pF) | G = 1 | 8 µs | µs | ||
| Operating Temperature Range | –40°C to +85°C | °C |
Key Features
- FET Input: Low input bias current of 5 pA.
- Low Offset Voltage: Input offset voltage of ±1.5 mV.
- Wide Supply Range: Operates on single (+4.5V to +36V) or dual (±2.25V to ±18V) supplies.
- Low Quiescent Current: 220 µA per channel.
- High Performance: Excellent speed/power ratio with a gain-bandwidth product of 1 MHz and a slew rate of 3.5 V/µs.
- MicroSIZE Packages: Available in SOT-23-5, MSOP-8, SO-8, and DIP packages.
- Independent Circuitry: Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction.
Applications
The OPA2137UA is suitable for a wide range of general-purpose applications. It is particularly useful in scenarios where low input bias current, low quiescent current, and high open-loop gain are required.
These amplifiers can be used in various circuits such as voltage followers, active filters, and signal conditioning circuits. They are also suitable for single-supply applications due to their ability to operate with input common-mode voltage ranges that include the positive supply.
Additionally, the OPA2137UA is recommended for applications where high linearity and fast settling times are necessary, such as in audio and medical equipment.
Q & A
- What is the input bias current of the OPA2137UA?
The input bias current of the OPA2137UA is 5 pA.
- What is the supply voltage range for the OPA2137UA?
The OPA2137UA can operate on single supplies from +4.5V to +36V or dual supplies from ±2.25V to ±18V.
- What is the quiescent current per channel for the OPA2137UA?
The quiescent current per channel for the OPA2137UA is 220 µA.
- What is the gain-bandwidth product (GBW) of the OPA2137UA?
The gain-bandwidth product (GBW) of the OPA2137UA is 1 MHz.
- What is the slew rate of the OPA2137UA?
The slew rate of the OPA2137UA is 3.5 V/µs.
- What are the typical settling times for the OPA2137UA?
The settling time for a 0.1% step response is approximately 8 µs, and for a 0.01% step response, it is about 10 µs.
- What are the operating temperature ranges for the OPA2137UA?
The OPA2137UA operates from –40°C to +85°C and is specified over this temperature range.
- What types of packages are available for the OPA2137UA?
The OPA2137UA is available in MSOP-8, SO-8, and 8-pin DIP packages.
- Are the amplifiers in dual and quad versions independent?
Yes, the amplifiers in dual and quad versions feature completely independent circuitry to minimize crosstalk and interaction.
- What precautions should be taken when operating at very low supply voltages?
When operating at very low supply voltages (VS ≤ ±3V), careful attention must be given to ensure that the common-mode voltage remains within the linear range.
