CS5532-BSZ IC

Features of? CS5532-BSZ IC :

• Chopper-stabilized PGIA (Programmable
  Gain Instrumentation Amplifier, 1x to 64x)
  ? 6 nV/?Hz @ 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

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 ?? 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).