CA-IS1300

CA-IS1300 supports sample rates up to 20kSPS (samples per second). The actual sample rate is determined by the SPI clock frequency and conversion timing. At maximum rate, the device can continuously convert with 50μs conversion time. For lower noise, you can reduce the sample rate or use averaging. The device supports both single conversion mode (triggered by SPI command) and continuous conversion mode for streaming data. For most industrial applications, 1-10kSPS provides adequate bandwidth with lower noise.

Select sample rate based on signal bandwidth requirements. Contact our FAE team for sampling strategy guidance.

CA-IS1300's integrated voltage reference has initial accuracy of ±0.2% and temperature drift of ±10ppm/°C typical. This provides excellent accuracy over temperature without external reference components. For even higher accuracy requirements, an external precision reference can be used. The reference output is available on a pin for external use if needed. For most industrial applications, the integrated reference provides sufficient accuracy. The reference is buffered and can drive external loads up to 100μA.

Integrated reference is adequate for most applications. Contact our FAE team for high-accuracy requirements.

Yes, CA-IS1300 can measure bipolar (positive and negative) input signals. The differential input accepts input ranges from ±250mV to ±2.5V, selectable via internal programmable gain amplifier. For bipolar measurements: Use differential input mode; Connect signal between AIN+ and AIN-; Common-mode range is ±1V; and Both inputs can swing positive and negative relative to AGND. This makes CA-IS1300 suitable for AC measurements, bridge sensors, and other bipolar signal sources.

Use differential mode for bipolar measurements. Contact our FAE team for input connection guidance.

CA-IS1300 is a sigma-delta ADC with internal digital filtering that provides inherent anti-aliasing. However, an external analog anti-aliasing filter is still recommended to prevent high-frequency noise from affecting the measurement. Recommended filter: Single-pole RC filter with cutoff at 1/10th of sample rate; For 10kSPS sampling, use 1kHz cutoff; Resistor: 1-10kΩ; Capacitor: Calculate C = 1/(2π × R × fc). Place filter close to ADC input. The sigma-delta architecture provides additional rejection of out-of-band signals through digital filtering.

Use RC anti-aliasing filter at input. Contact our FAE team for filter design assistance.

CA-IS1300 can be calibrated for offset and gain errors to achieve highest accuracy. Calibration procedure: Apply known zero input (shorted inputs) and read offset; Apply known full-scale input and read gain error; Store calibration coefficients in microcontroller; Apply correction in software. Typical calibration improves accuracy to ±0.005% FS. The device has good stability over temperature, so calibration at room temperature is usually sufficient. For critical applications, consider two-point calibration at minimum and maximum operating temperatures.

Perform two-point calibration for highest accuracy. Contact our FAE team for calibration procedures.

CA-IS1300 power consumption depends on operating mode and supply voltages. Typical consumption: Active conversion: 15mA at 5V (75mW); Standby mode: 2mA (10mW); Power-down mode: 50μA (0.25mW). The isolated side and non-isolated side have separate power supplies. Both sides consume similar power. For low-power applications, use power-down mode between conversions. The device powers up and stabilizes in less than 1ms, allowing duty-cycled operation for battery-powered applications.

Use power-down mode for low-power applications. Contact our FAE team for power management strategies.