The TSZ901 op amp from STMicroelectronics maintains its stability across its entire temperature range. Features include: Maximum input offset current of 1200 pA holds steady across the entire temperature range of -40 °C to +125°C; Input offset voltage is 8 μV from -40°C to 125°C); draws 1.5 mA at VCC = 5V. The TSZ901 is AEC-Q100 […]
Amplifiers
Ultra-compact op amp achieves 160 nA operating current
ROHM Semiconductor announced the development of the TLR1901GXZ, an ultra-compact CMOS operational amplifier (op amp) that achieves the industry’s lowest operating circuit current. Optimized for use as a sensing amplifier, this IC is ideally suited for space-constrained applications such as handheld measurement instruments, wearable devices, and indoor motion detectors. As the demand continues to grow for more sophisticated control […]
Automotive Class-D amplifier operates -40 °C to +105 °C
Nuvoton has released the NAU83U25YG, an automotive-grade Class-D audio amplifier designed for vehicle electronics applications. The stereo amplifier delivers 3W output power into 4Ω loads or 1.7W into 8Ω loads, operating with digital I2S input signals and featuring I²C-controlled gain adjustment from 22 dB to -62 dB. The NAU83U25YG meets AEC-Q100 automotive qualification standards and […]
How op amps work and why you should use them: part 3
Operational amplifiers (op amps) are almost the perfect amplifier. As long as you keep a few important details in mind, their imperfections will seem invisible. In part 1, Equations 2 and 3 used the term AV for the voltage gain of the simple noninverting amplifier shown in Figure 1. The equations use α for the […]
Class-D amplifiers operate at 2 MHz switching frequency to reduce PCB space
STMicroelectronics has revealed new class-D automotive audio amplifiers for smart-cockpit applications, engineered for tiny overall dimensions and with a digital input that simplifies circuit design. The new HFDA80D and HFDA90D extend ST’s family of high-frequency automotive amplifiers, complementing the HFA80A analog-input IC. All the devices operate at a switching frequency of 2MHz to save PCB […]
How op amps work and why you should use them: part 1
Operational amplifiers (op amps) may initially look intimidating, but with a bit of study, they can be easily understood and used in a variety of applications. Op amps can be thought of as a perfect amplifier in a black box. When we create a design using an op amp, we initially presume that the device […]
Amplifier delivers 0.15% gain accuracy with 2.1 MHz bandwidth
STMicroelectronics’ TSC1801 low-side current-measurement amplifier integrates matched resistors to set the gain, which simplifies the circuit design, saves bill-of-materials costs, and ensures gain accuracy within 0.15% over the entire temperature range. The fixed gain also eliminates production trimming of external resistors. Combining very high accuracy and wide bandwidth, the TSC1801 is used for motor control, […]
Design a circuit for ultra-low power sensor applications
Sensors monitoring mechanical and biological systems must often scavenge power from the thing being sensed. The oscillator circuits shown here let you operate those sensors. Sensor circuits that connect to thermocouples, electromagnetic mechanical-to-electrical transducers, and piezoelectric mechanical-to-electrical transducers often use oscillators powered through energy harvesting from solar cells and other sources. These power sources can […]
Infrared preamps improve sensitivity and better reject interference
Vishay Intertechnology, Inc. announced that it has upgraded its VSOP383xx series of preamplifier circuits for infrared (IR) remote control applications in consumer products with the new Cyllene 2 IC. Offered in the 2 mm by 2 mm by 0.76 mm QFN package, the enhanced solutions provide drop-in, plug-and-play replacements for existing devices in the series […]
What are the advantages of a three op-amp instrumentation amplifier?
An instrumentation amplifier (INA) built using three operational amplifiers (op amps) can provide performance advantages in terms of high input impedance, low output impedance, easily adjustable gain, excellent common-mode rejection ratio (CMRR), high accuracy, and high open-loop gain. This article examines the basic design of INAs and their performance benefits, then discusses some application considerations, […]
