CS5533-ASZR

The CS553133 is highly integrated ?S Analogto-Digital Converters (ADCs) which use charge-balance techniques to achieve 16-bit (CS5533) and 24-bit (CS5532/34) performance. The ADCs are optimized for measuring low-level unipolar or bipolar signals in weigh scale, process control, scientific, and medical applications. Four-channel(CS5533) devices and include a very low noise chopper-stabilized instrumentation amplifier (6 nV/vHz @ 0.1 Hz) with selectable gains of 1×, 2×, 4×, 8×, 16×, 32×, and 64×. These ADCs also include a fourth order ?S 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).

• Chopper-stabilized PGIA (Programmable
• Gain Instrumentation Amplifier, 1x to 64x)
  • 12 nV/vHz @ 0.1 Hz (No 1/f noise) at 64x
  • 1200 pA Input Current with Gains >1
• Delta-sigma Analog-to-digital Converter
  • Linearity Error: 0.0007% FS
  • Noise Free Resolution: Up to 23 bits
• Two- or Four-channel Differential MUX
• Scalable Input Span via Calibration
  • ±5 mV to differential ±2.5V
• Scalable VREF Input: Up to Analog Supply
• Simple Three-wire Serial Interface
  • SPI™ and Microwire™ Compatible
  • Schmitt Trigger on Serial Clock (SCLK)
• R/W Calibration Registers Per Channel
• Selectable Word Rates: 6.25 to 3,840 Sps
• Selectable 50 or 60 Hz Rejection
• Power Supply Configurations
  • VA+ = +5 V; VA- = 0 V; VD+ = +3 V to +5 V
  • VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V to +5 V
  • VA+ = +3 V; VA- = -3 V; VD+ = +3 V