Overview
The OPA2156, produced by Texas Instruments, is a 36-V, ultra-low noise, wide-bandwidth, CMOS precision operational amplifier. It is the first in a new generation of rail-to-rail operational amplifiers designed for high-voltage precision industrial applications. The OPA2156 offers exceptional performance with very low offset voltage (±25 µV), low offset voltage drift (±0.5 µV/°C), and low bias current (±5 pA). It also features low broadband voltage noise (3 nV/√Hz at 10 kHz) and a wide bandwidth of 25 MHz. The device is available in 8-pin SOIC and VSSOP packages and is specified over the industrial temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Offset Voltage | - | - | ±25 | µV | |
| Offset Voltage Drift | - | - | ±0.5 | µV/°C | |
| Bias Current | - | - | ±5 | pA | |
| Common-Mode Rejection Ratio (CMRR) | TA = 25°C, VS = ±18 V | - | 120 | dB | |
| Voltage Noise Density | f = 10 kHz | - | 3 | nV/√Hz | |
| Bandwidth (GBW) | Unity Gain | - | 25 | MHz | |
| Open-Loop Voltage Gain (AOL) | VS = ±18 V | 130 | 154 | dB | |
| Output Current | - | - | 100 | mA | |
| Slew Rate | - | - | 40 | V/µs | |
| Supply Voltage Range | - | ±2.25 V to ±18 V, 4.5 V to 36 V | - | V | |
| Package Types | - | - | SOIC-8, VSSOP-8 | - | |
| Operating Temperature Range | - | - | –40°C to +125°C | - |
Key Features
- Ultra-low noise: 3 nV/√Hz at 10 kHz
- Low offset voltage: ±25 µV
- Low offset voltage drift: ±0.5 µV/°C
- Low bias current: ±5 pA
- High common-mode rejection ratio (CMRR): 120 dB
- Wide bandwidth: 25 MHz
- High open-loop voltage gain: 154 dB
- High output current: 100 mA
- High slew rate: 40 V/µs
- Rail-to-rail input and output voltage ranges
- Internal phase-reversal protection
- Electrical overstress protection with ESD circuits
Applications
- Data acquisition (DAQ)
- Photodiode transimpedance amplifiers
- Vibration monitor modules
- Analog input modules
- High-resolution ADC driver amplifiers
- Medical equipment
Q & A
- What is the offset voltage of the OPA2156?
The offset voltage of the OPA2156 is ±25 µV.
- What is the typical voltage noise density of the OPA2156 at 10 kHz?
The typical voltage noise density at 10 kHz is 3 nV/√Hz.
- What is the bandwidth of the OPA2156?
The bandwidth (GBW) of the OPA2156 is 25 MHz.
- What is the maximum output current of the OPA2156?
The maximum output current is 100 mA.
- What are the package options for the OPA2156?
The OPA2156 is available in 8-pin SOIC and VSSOP packages.
- What is the operating temperature range of the OPA2156?
The operating temperature range is –40°C to +125°C.
- Does the OPA2156 have phase-reversal protection?
Yes, the OPA2156 has internal phase-reversal protection.
- What are some common applications of the OPA2156?
Common applications include data acquisition, photodiode transimpedance amplifiers, vibration monitor modules, analog input modules, high-resolution ADC driver amplifiers, and medical equipment.
- What is the slew rate of the OPA2156?
The slew rate of the OPA2156 is 40 V/µs.
- Does the OPA2156 have ESD protection?
Yes, the OPA2156 has internal ESD protection circuits.
