Overview
The OPA843IDBVR, produced by Texas Instruments, is a high-speed operational amplifier that offers exceptional speed and dynamic range. This monolithic op amp features a two-gain-stage design, providing a medium gain range with outstanding dynamic range and DC precision. It is particularly suited for applications requiring high bandwidth, low noise, and minimal distortion.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| Gain Bandwidth (GBW) | 260 MHz (G = +5) | MHz | G = +5 |
| Gain-Bandwidth Product | 800 MHz | MHz | |
| Input Voltage Noise | 2.0 nV/√Hz | nV/√Hz | |
| Harmonic Distortion (3rd Harmonic) | –96 dBc (5 MHz, G = +5, RL = 100 Ω) | dBc | f = 5 MHz, VO = 2 VPP, RL = 100 Ω |
| Open-Loop Voltage Gain (AOL) | 110 dB (min) | dB | VO = 0 V |
| Input Offset Voltage | ±0.30 mV (max) | mV | VCM = 0 V |
| Power Supply Rejection Ratio (PSRR) | 100 dB (min) | dB | |VS| = 4.5 V to 5.5 V, Input Referred |
| Operating Temperature Range | –40°C to +85°C | °C | |
| Package Type | SOT23-5 |
Key Features
- High Gain Bandwidth: 260 MHz (G = +5) and Gain-Bandwidth Product of 800 MHz
- Low Input Voltage Noise: 2.0 nV/√Hz
- Very Low Distortion: –96 dBc (5 MHz, G = +5, RL = 100 Ω)
- High DC Precision: Low input offset voltage and current, high Common-Mode Rejection Ratio (CMRR) and Power-Supply Rejection Ratio (PSRR)
- High Open-Loop Gain: 110 dB (min) at VO = 0 V
- Wide Operating Temperature Range: –40°C to +85°C
Applications
- 12- to 16-bit Converter Interfaces: Benefits from the combination of high bandwidth and low noise.
- High-Speed Transimpedance Applications: Ideal for photodiode amplifiers due to its high GBP and low input noise.
- Wide Dynamic Range “IF” Amplifier: Suitable for narrowband and broadband systems with high 2-tone 3rd-order intermodulation intercept.
- Differential Configurations: Can deliver very low distortion to high output voltages.
- Video Applications: Offers good differential gain and phase performance, making it suitable for video signal processing.
Q & A
- What is the gain bandwidth of the OPA843 at a gain of +5?
The gain bandwidth of the OPA843 at a gain of +5 is 260 MHz.
- What is the input voltage noise of the OPA843?
The input voltage noise of the OPA843 is 2.0 nV/√Hz.
- What is the harmonic distortion of the OPA843 at 5 MHz and a gain of +5?
The harmonic distortion of the OPA843 at 5 MHz and a gain of +5 is –96 dBc.
- What is the operating temperature range of the OPA843?
The operating temperature range of the OPA843 is –40°C to +85°C.
- What package types are available for the OPA843?
The OPA843 is available in SO-8 and SOT23-5 packages.
- What are some typical applications of the OPA843?
The OPA843 is typically used in 12- to 16-bit converter interfaces, high-speed transimpedance applications, wide dynamic range “IF” amplifiers, and differential configurations.
- How does the OPA843 perform in terms of DC precision?
The OPA843 offers high DC precision with low input offset voltage and current, high CMRR, and high PSRR.
- What is the open-loop voltage gain of the OPA843?
The open-loop voltage gain of the OPA843 is 110 dB (min) at VO = 0 V.
- How does the OPA843 handle high-frequency signals?
The OPA843 handles high-frequency signals with a high gain-bandwidth product and low harmonic distortion, making it suitable for high-frequency applications.
- Is the OPA843 suitable for video signal processing?
Yes, the OPA843 is suitable for video signal processing due to its good differential gain and phase performance.
