The CS5532/34 are highly integrated ΔΣ Analog-to-Digital
Converters (ADCs) which use charge-balance
techniques to achieve 24-bit performance. The ADCs
are optimized for measuring low-level unipolar or bipolar
signals in weigh scale, process control, scientific, and
medical applications.
To accommodate these applications, the ADCs come as
either two-channel (CS5532) or four-channel (CS5534)
devices and include a very low-noise, chopper-stabilized
instrumentation amplifier (6 nV/√Hz @ 0.1 Hz) with selectable
gains of 1×, 2×, 4×, 8×, 16×, 32×, and 64×.
These ADCs also include a fourth-order ΔΣ modulator
followed by a digital filter which provides twenty selectable
output word rates of 6.25, 7.5, 12.5, 15, 25, 30, 50, 60, 100,
120, 200, 240, 400, 480, 800, 960, 1600, 1920, 3200, and
3840 Sps (MCLK = 4.9152 MHz).
To ease communication between the ADCs and a microcontroller,
the converters include a simple three-wire serial
interface which is SPI™ and Microwire™ compatible
with a Schmitt-trigger input on the serial clock (SCLK).
High dynamic range, programmable output rates, and
flexible power supply options makes these ADCs ideal
solutions for weigh scale and process control applications.