The CS5516 and CS5520 are complete solutions for digitizing low-level signals from strain gauges, load cells, and pressure transducers. These devices offer an on-chip software programmable instrumentation amplifier block, choice of DC or AC bridge excitation, and software selectable reference and signal demodulation. The CS5516 uses delta-sigma modulation to achieve 16-bit resolution at output word rates up to 60 Hz. The CS5520 achieves 20-bit resolution at word rates up to 60 Hz. The CS5516 and CS5520 sample at a rate set by the user in the form of either an external CMOS clock or a crystal. On-chip digital filtering provides rejection of all frequencies.
The CS5516 and CS5520 are bridge‑transducer A/D converters that digitize low‑level signals from strain gauges, load cells and pressure transducers. They include on‑chip instrumentation amplifiers, programmable gain amplifiers, and selectable DC or AC bridge excitation. The CS5516 provides 16‑bit resolution, while the CS5520 offers 20‑bit resolution, both at up to 60 Hz output rates.
The devices feature low power consumption (40 mW normal, 10 pW standby), high CMRR (>200 dB at 50/60 Hz), and extensive calibration capabilities via a serial interface. Detailed analog, digital, and operating specifications are provided for system designers.
| Linearity Error | +0.0015 % FS |
|---|---|
| CMRR (50/60 Hz) | >200 dB |
| Low Power Consumption | 40 mW |
| Standby Power | 10 pW |
| Specified Temperature Range | -40 °C to +85 °C |
| Input Capacitance | 5 pF |
| Input Bias Current | 100 pA |
| Gain | 25 |
| Bandwidth | 200 kHz |
| Digital Supply Current (VD+) | 2.7 mA to 3.5 mA |
The CS5516 provides 16‑bit resolution at output word rates up to 60 Hz.
The device consumes 10 pW in standby mode.
They operate from –40 °C to +85 °C.
The CMRR is greater than 200 dB at 50/60 Hz.