Delta-Sigma Modulator, 8-400 kHz, 16-Bit A/D Converter

The CS5180 is a fully calibrated, high-speed Delta-Sigma A/D converter, capable of 400 kSamples/second output word rate (OWR). The OWR scales with the master clock. It consists of a fifth-order Delta-Sigma modulator, decimation filter, and serial interface.

The chip can use the 2.375V on-chip voltage reference or an external 2.5V reference. The input voltage range is 1.6x VREFIN Vpp fully differential.

Multiple CS5180s can be fully synchronized in multi-channel applications with a SYNC signal. The part has a power-down mode to minimize power consumption at times of system inactivity. The high-speed digital I/O lines have complementary signals to help reduce radiated noise from traces on the PC board. The CS5180 can also be operated in modulator-only mode which provides the Delta-Sigma modulator bitstream as the output.

• 16-bit Delta-Sigma A/D converter
• Fully differential input with 4.0 Vpp range
• Dynamic range: 93 dB
• Spurious free dynamic range: 96 dB
• Total harmonic distortion: -95 dB @ 22 kHz
• Up to 400 kHz output word rate
• No missing codes
• Non-aliasing low-pass digital filter
• High-speed, 3-wire, serial interface
• Modulator output mode
• Supply options
  • VA+ = 5V, VD+ = 5V, 690 mW
  • VA+ = 5V, VD+ = 3V, 368 mW
• Power-down mode
• Package: 28-pin PLCC, 44-pin TQFP