Overview
The OPA2834IDGKR is a dual-channel, ultra-low-power, rail-to-rail output, negative-rail input, voltage-feedback operational amplifier produced by Texas Instruments. This amplifier is designed to operate over a power-supply range of 2.7 V to 5.4 V with a single supply, or ±1.35 V to ±2.7 V with a dual supply. It is particularly suited for battery-powered and portable applications where low power consumption is crucial. The OPA2834 offers an industry-leading performance-to-power ratio, making it ideal for data acquisition systems, microphone pre-amplifiers, and other low-power signal conditioning applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (Single Supply) | 2.7 | - | 5.4 | V |
| Quiescent Current per Amplifier | 170 | 210 | 290 | µA |
| Bandwidth (G = 1 V/V) | 50 | - | - | MHz |
| Slew Rate | 26 | - | - | V/µs |
| Settling Time (0.1%, 2-V Step) | 88 | - | - | ns |
| Input Voltage Noise (f = 10 kHz) | 12 | - | - | nV/√Hz |
| Input Offset Voltage | 350 | - | ±1.9 mV | µV |
| Operating Temperature Range | -40 | - | 125 | °C |
| Input Voltage Range (5-V Supply) | -0.2 | - | 3.9 | V |
Key Features
- Ultra-low power consumption: 170 µA per channel.
- High bandwidth: 50 MHz at a gain of 1 V/V.
- High slew rate: 26 V/µs.
- Low distortion: HD2 and HD3 of –131 dBc and –146 dBc at 10 kHz.
- Low input voltage noise: 12 nV/√Hz at 10 kHz.
- Negative rail input and rail-to-rail output.
- Operating temperature range: –40°C to +125°C.
Applications
- Current sensing in power supplies.
- Low-power signal conditioning.
- Battery-powered applications.
- Portable voice recorders.
- Low-power SAR and ΔΣ ADC drivers.
- Portable devices.
Q & A
- What is the typical quiescent current of the OPA2834?
The typical quiescent current per amplifier is 170 µA.
- What is the bandwidth of the OPA2834 at a gain of 1 V/V?
The bandwidth is 50 MHz at a gain of 1 V/V.
- What is the slew rate of the OPA2834?
The slew rate is 26 V/µs.
- What are the typical harmonic distortion values for the OPA2834?
The typical harmonic distortion values are HD2 and HD3 of –131 dBc and –146 dBc at 10 kHz.
- What is the input voltage noise of the OPA2834 at 10 kHz?
The input voltage noise is 12 nV/√Hz at 10 kHz.
- What is the operating temperature range of the OPA2834?
The operating temperature range is –40°C to +125°C.
- What are some common applications of the OPA2834?
Common applications include current sensing in power supplies, low-power signal conditioning, battery-powered applications, portable voice recorders, and low-power SAR and ΔΣ ADC drivers.
- What is the package type of the OPA2834IDGKR?
The package type is VSSOP (8 pins) with a body size of 3.00 mm × 3.00 mm.
- What is the maximum junction temperature of the OPA2834?
The maximum junction temperature is 150°C.
- What are the ESD ratings for the OPA2834?
The ESD ratings are ±2000 V for the human body model (HBM) and ±1500 V for the charged-device model (CDM).
