Housed in a 24-lead TSSOP, the AD7190 sigma-delta A/D converter achieves greater than true 16-bit noise-free resolution up to 2.4 kHz across all input voltages from 40 mV to 5 V. The part includes an on-chip PGA with an rms noise of 7 nV at a 4.8-kHz data rate with a gain of 128 and an offset drift of 5 nV/°C.
On-chip features include an oscillator, a temperature sensor, a bridge power-down switch, a reference detect monitor, and a choice of single-ended, pseudo-differential, or fully differential input channels. Also included on-chip are simultaneous 50-/60-Hz rejection, offset and gain calibration, open sensor detection, a choice of chopped or nonchopped signal, and four general-purpose output pins. A zero-latency mode is selectable in order to reduce software overheads if a valid conversion per data output is desired. ($5.90 ea/1,000 prod qty, November.)
Analog Devices , Wilmington , MA
Technical Support 800-262-5643
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