ADS1626IPAPT

18位， 1.25MSPS模拟数字转换器 18-Bit, 1.25MSPS Analog-to-Digital Converter

The ADS1625 and ADS1626 are high-speed, high-precision, delta-sigma analog-to-digital converters ADCs with 18-bit resolution. The data rate is 1.25 mega samples per second MSPS, the bandwidth -3dB is 615kHz, and passband ripple is less than ±0.0025dB to 550kHz. Both devices offer the same outstanding performance at these speeds with a signal-to-noise ratio up to 93dB, total harmonic distortion down to -101dB, and a spurious-free dynamic range up to 103dB. The ADS1626 includes an adjustable first-in, first-out buffer FIFO for the output data.

The input signal is measured against a voltage reference that can be generated on-chip or supplied externally. The digital output data is provided over a simple parallel interface that easily connects to digital signal processors DSPs. An out-of-range monitor reports when the input range has been exceeded. The ADS1625/6 operate from a +5V analog supply AVDD and +3V digital supply DVDD. The digital I/O supply IOVDD operates from +2.7 to +5.25V, enabling the digital interface to support a range of logic families. The analog power dissipation is set by an external resistor and can be reduced when operating at slower speeds. A power-down mode, activated by a digital I/O pin, shuts down all circuitry. The ADS1625/6 are offered in a TQFP-64 package using PowerPAD™ technology.

The ADS1625 and ADS1626, along with their 16-bit, 5MSPS counterparts, the ADS1605 and ADS1606, are well-suited for the demanding measurement requirements of scientific instrumentation, automated test equipment, data acquisition, and medical imaging.