R-to-R LM324-like op-amps are faster for automotive and industrial needs

Author: EIS Release Date: Dec 8, 2022

Delivering many improved major specs over traditional LM324 op-amps, but with rail-to-rail inputs and outputs, STMicroelectronics has introduced a 6MHz all-rounder op-amp family that will operate from a single 2.7 to 36 V supply as well as from ±1.35 to ±18V dual supplies.

 

ST TSB514 opamp

TSB511, TSB512, and TSB514 are single, dual and quad op-amps respectively.

 

“This wide voltage range and flexibility let engineers apply a familiar op-amp type across various applications and different power domains,” according to the company. “The rail-to-rail input and output help ensure suitable dynamic range when operating close to the minimum supply voltage.”

 

Input noise density is 12nV/√Hz, the devices slew at 3V/µs and maximum offset voltage is 1.5mV.

 

Operation is over -40°C to 125°C for use in industry, and automotive-qualified variants are available.

 

Where a penalty is paid is in power consumption, which is typically 1.4mA per amp (5V 25°C, 2.3mA max over temp) compared with ~700μA per amp in an LM324.

 

SOT-23, Mini SO8, SO8, SOT23-5, TSSOP14 and SO14 packaging is available, and the amplifiers are included in ST’s 10-year longevity program.

 

Pin assignments are traditional, allowing older op-amps to be replaced, but these are not necessarily drop-in replacements for LM324-type op-amps as, for example, the inputs of an LM324 are 30V-protected regardless of Vcc and the TSB51x family is not.

 

These are general-purpose op-amps. ST sees them filtering, high and low-side current sensing, an sensor interfacing in power supplies, motor controls, test equipment and industrial controllers.

 

For similar op-amps with higher precision, try ST’s TSB711, TSB712 TSB714 family.