Analog Devices, Inc. today introduced a FET input AFE with an integrated ADC driver designed to interface directly with current mode sensors such as photo diodes and high output impedance voltage sensors. The ADA4350 integrates a FET input amplifier, switching network and ADC driver into a single package, which simplifies design and lowers power and PCB footprint by more than 50 percent compared to discrete implementations.
The ADA4350 features low-noise performance at low frequencies of 90nV/√Hz at 10 Hz and broadband noise of 5 nV/√Hz at 100 kHz to maximize the signal-to-noise ratio of the sensor output. Wide dynamic range measurement for small, sensitive signals such as photons or electrons is enabled with the inclusion of integrated gain switching. The on-chip programmability of the ADA4350 allows designers to select external, optimized feedback components. With one chip, a single-ended or differential sensor current or voltage signal can be transformed to a high-speed, low-noise, single-ended or differential-output voltage.
For measuring a wider dynamic range, the ADA4350 is a good choice because of its high-impedance/low-Ib input amplifier and serial port-controlled switch network. The device also reduces PCB footprint while significantly increasing channel count without thermal density restrictions. The ADA4350 is available for immediate shipment. It costs $5.73 in lots of 1,000 and is packaged in a 28-lead TSSOP.
source: http://www.powerpulse.net/story.php?storyID=32189
Comments are closed.
