LTC2351CUH-14#PBF

The LTC2351CUH-14#PBF is an ultra-fast, low-noise, 16-bit, 1 LSB INL, single-channel sampling analog-to-digital converter (ADC). It features an exceptionally low voltage noise of only 0.6 μVrms and an FFT noise density of 67 nV/√Hz. These low level specifications enable the LTC2351CUH-14#PBF to accurately measure extremely low amplitude signals and make it an ideal choice for cost-sensitive data acquisition applications.

In addition to its low noise performance, the LTC2351CUH-14#PBF also features a very fast sample rate of up to 3.125Msps and a wide, 3.3V to 5V supply voltage range. This high-speed capability and flexible supply options makes the device suitable for multiple single-channel device applications such as audio and communications, low-level sensor signal detection, and instrumentation.

The LTC2351CUH-14#PBF is built around the high-performance analog-to-digital core. In this ADC architecture, a 4.096V reference voltage is used during the sampling cycle to convert the analog input signal into a digital code. A built-in track-and-hold circuit captures the analog input at 5-8MHz and holds its value for a set amount of time. The ADC then converts the held analog input into a 16-bit digital representation of the signal’s amplitude. The 16 bits of resolution, or the number of bits available to represent the analog input amplitude, is determined by the gain error of the ADC and the reference voltage.

The output digital code is then fed through a noise-shaping filters that can reduce the noise by up to 40dB. This noise-shaping filter enables higher resolution performance. The filtered digital data is then latched into an internal 16-bit parallel data register. This register can be read by the host controller at the completion of each conversion cycle.

The LTC2351CUH-14#PBF also features an independent power-down control for the analog-to-digital converter, the track-and-hold circuit, and the noise-shaping filter. This feature enables the designer to minimize power consumption when the ADC is not actively monitoring the analog input.

Overall, the LTC2351CUH-14#PBF is an ideal solution for low-noise, fast-sampling data acquisition applications. It features a very low noise level for accurate and reliable conversions and a fast sampling rate for quick response time. Moreover, its integrated noise-shaping filter provides improved resolution and an independent control for power-down mode.