CS5525-ASZR

The 16-bit CS5525 and the 20-bit CS5526 are highly integrated?S A/D converters which include aninstrumentation amplifier, a PGA (programmable gainamplifier), eight digital filters, and self and system calibrationcircuitry.The converters are designed to provide their own negativesupply which enables their on-chip instrumentationamplifiers to measure bipolar ground-referenced signals=±100 mV. By directly supplying NBV with -2.5 V andwith VA+ at 5 V, ±2.5 V signals (with respect to ground)can be measured.The digital filters provide programmable output updaterates between 3.76 Sps to 202 Sps (XIN = 32.768 kHz).Output word rates can be increased by approximately 3Xby using XIN = 100 kHz. Each filter is designed to settleto full accuracy for its output update rate in one conversioncycle. The filters with word rates of 15 Sps or less(XIN = 32.768 kHz) reject both 50 and 60 Hz (±3 Hz) lineinterference simultaneously.Low power, single conversion settling time, programmableoutput rates, and the ability to handle negative inputsignals make these single supply products ideal solutionsfor isolated and non-isolated applications.

• Delta-sigma A/D Converter
  • Linearity Error: 0.0015%FS
  • Noise-free Resolution: 18-bits
• Bipolar/Unipolar Input Ranges
  • 25 mV, 55 mV, 100 mV, 1 V, 2.5 V and 5 V
• Chopper Stabilized Instrumentation Amplifier zOn-chip Charge Pump Drive Circuitry
• 4-bit Output Latch
• Simple three-wire serial interface
  • SPI™ and Microwire™ Compatible
  • Schmitt Trigger on Serial Clock (SCLK)
• Programmable Output Word Rates
  • 3.76 Sps to 202 Sps (XIN = 32.768 kHz)
  • 11.47 Sps to 616 Sps (XIN = 100 kHz) zOutput Settles in One Conversion Cycle
• Simultaneous 50/60 H
• Noise Rejection
• System and Self-calibration with Read/Write Registers
• Single +5 V Analog Supply +3.0 V or +5 V Digital Supply
• Low-power Mode Consumption: 4.9 mW
  • 1.8 mW in 1 V, 2.5 V, and 5 V Input Ranges