Overview
The INA157UA/2K5 is a high-performance difference amplifier produced by Texas Instruments. It is part of the INA157 series, which includes a precision op amp with a precision resistor network. This device is designed for low-cost, high-accuracy applications and is available in an SO-8 surface-mount package. The INA157UA/2K5 operates over a wide supply range of ±4V to ±18V and is specified for operation over the extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Offset Voltage | Initial | ±100 | ±500 | ±1000 | µV |
| Offset Voltage Drift | vs Temperature | ±2 | ±20 | - | µV/°C |
| Gain Error | - | - | ±0.05% | - | % |
| Bandwidth | - | - | 3MHz | - | MHz |
| Slew Rate | - | - | 14V/µs | - | V/µs |
| Settling Time | to 0.01% | - | 3µs | - | µs |
| Quiescent Current | IO = 0mA | ±2.4 | ±2.9 | - | mA |
| Operating Temperature | - | -40 | - | +85 | °C |
| Thermal Resistance, ΘJA | SO-8 Surface-Mount | - | 150 | - | °C/W |
Key Features
- Low offset voltage: ±500µV max
- Low offset drift: ±2µV/°C
- Low gain error: ±0.05% max
- Wide bandwidth: 3MHz
- High slew rate: 14V/µs
- Fast settling time: 3µs to 0.01%
- Wide supply range: ±4V to ±18V
- Low quiescent current: 2.4mA
- SO-8 surface-mount package
- Extended industrial temperature range: –40°C to +85°C
Applications
- Differential input amplifier
- Instrumentation amplifier building block
- G = 1/2 amplifier
- G = 2 amplifier
- Differential current receiver
- Voltage-controlled current source
- Ground loop eliminator
- Current shunt monitor
Q & A
- What is the INA157UA/2K5 used for?
The INA157UA/2K5 is a high-performance difference amplifier used in various applications such as differential input amplifiers, instrumentation amplifiers, and current shunt monitors.
- What is the operating temperature range of the INA157UA/2K5?
The INA157UA/2K5 operates over an extended industrial temperature range of –40°C to +85°C.
- What is the supply voltage range for the INA157UA/2K5?
The device operates on supplies ranging from ±4V to ±18V.
- What is the typical quiescent current of the INA157UA/2K5?
The typical quiescent current is 2.4mA.
- What is the slew rate of the INA157UA/2K5?
The slew rate is 14V/µs.
- How does the INA157UA/2K5 handle common-mode rejection?
The device has excellent common-mode rejection due to the laser-trimmed resistors, which maintain gain accuracy and common-mode rejection over temperature.
- Can the INA157UA/2K5 be used in high-impedance power supply applications?
Yes, but decoupling capacitors are strongly recommended to be placed close to the device pins for noisy or high impedance power supplies.
- What is the bandwidth of the INA157UA/2K5?
The bandwidth is 3MHz.
- How does the offset voltage of the INA157UA/2K5 behave over temperature?
The offset voltage drift is ±2µV/°C.
- Can the INA157UA/2K5 be used in applications requiring G = 1 gain?
No, for applications requiring G = 1, the INA154 is recommended instead.
