20-Bit ADC which digital filters

CS5526
CS5526 are highly integrated A/D converters which include
An instrumentation amplifier, a PGA (programmable gain
amplifier), eight digital filters, and self and system calibration
circuitry.

The converters are designed to provide their own negative
supply which enables their on-chip instrumentation
amplifiers to measure bipolar ground-referenced signals
±100 mV. By directly supplying NBV with -2.5 V and
with VA+ at 5 V, 2.5 V signals (with respect to ground)
can be measured.


Features
lDelta-Sigma A/D Converter
- Linearity Error: 0.0015%FS
- Noise Free Resolution: 18-bits lBipolar/Unipolar
- 25 mV, 55 mV, 100 mV, 1 V, 2.5 V and 5 V
lChopper Stabilized Instrumentation Amplifier
lOn-Chip Charge Pump Drive Circuitry
l4-Bit Output Latch
lSimple three-wire serial interface
- SPI™ and Microwire™ Compatible
- Schmitt Trigger on Serial Clock (SCLK)
lProgrammable Output Word Rates
- 3.76 Hz to 202Hz (XIN = 32.768 kHz)
- 11.47 Hz to 616 Hz (XIN = 100 kHz)
lOutput Settles in One Conversion Cycle
lSimultaneous 50/60 Hz Noise Rejection
lSystem and Self-Calibration with
Read/Write Registers
lSingle +5 V Analog Supply
+3.0 V or +5 V Digital Supply
lLow Power Mode Consumption: 4 mW
- 1.8 mW in 1 V, 2.5 V, and 5 V Input Ranges



CS5526 datasheet pdf

Application note
Interfacing CS5526 to the 80C51
Interfacing CS5526 to the PIC16F84