Chopper op-amp has excellent speed/power consumption ratio
Last time I counted there were 1,275,552 (±3) different operational amplifiers (op-amps) on the market. Given this large choice one would expect that for every possible application a suitable device would be available, and yet semiconductor manufacturers keep surprising us with new types. Take this one for instance, the TSZ182, a new dual operational amplifier featuring very low offset voltages with virtually zero drift over varying temperature.
Last time I counted there were 1,275,552 (±3) different operational amplifiers (op-amps) on the market. Given this large choice one would expect that for every possible application a suitable device would be available, and yet semiconductor manufacturers keep surprising us with new types. Take this one for instance, the TSZ182, a new dual operational amplifier featuring very low offset voltages with virtually zero drift over varying temperature.
Launched this month by STMicroelectronics, the new device offers rail-to-rail input and output, which is always nice, and a 3 MHz gain bandwidth product (ain’t that much), while consuming about 1 mA at 5 V. With its ultra-low input bias current, it is obvious that the op-amp is ideal for high accuracy, high-bandwidth sensor interfaces.
According to the datasheet the TSZ182 also has an excellent speed/power consumption ratio. Now what would that be? How much is an excellent speed/power consumption ratio anyway? 5 mph/W? 100 km/h/mWh? Slew rate per MHz? The datasheet is loaded with graphs and tables, but, probably because I don’t know where to look, impossible to find something relating speed to power. Microprocessor manufacturers sometimes specify things like mW/MHz, making comparisons possible, but simply saying that something is excellent is just an empty, silly and useless statement. ST, please, you can do better than that.
Launched this month by STMicroelectronics, the new device offers rail-to-rail input and output, which is always nice, and a 3 MHz gain bandwidth product (ain’t that much), while consuming about 1 mA at 5 V. With its ultra-low input bias current, it is obvious that the op-amp is ideal for high accuracy, high-bandwidth sensor interfaces.
According to the datasheet the TSZ182 also has an excellent speed/power consumption ratio. Now what would that be? How much is an excellent speed/power consumption ratio anyway? 5 mph/W? 100 km/h/mWh? Slew rate per MHz? The datasheet is loaded with graphs and tables, but, probably because I don’t know where to look, impossible to find something relating speed to power. Microprocessor manufacturers sometimes specify things like mW/MHz, making comparisons possible, but simply saying that something is excellent is just an empty, silly and useless statement. ST, please, you can do better than that.
