AD7170

Data Sheet FEATURES Output data rate: 125 Hz Pin-programmable power-down and reset Status function Internal clock oscillator Current: 135 µA Power supply: 2.7 V to 5.25 V −40°C to +105°C temperature range Package: 10-lead, 3 mm × 3 mm LFCSP INTERFACE 2-wire serial (read-only device) SPI compatible Schmitt trigger on SCLK APPLICATIONS Pressure measurement Industrial process control Portable instrumentation 12-Bit Low Power Sigma-Delta ADC AD7170 FUNCTIONAL BLOCK DIAGRAM GND VDD REFIN(+) REFIN(–) AIN(+) AIN(–) 12-BIT Σ-Δ ADC DOUT/RDY SCLK 08416-001 AD7170 INTERNAL CLOCK PDRST Table 1. VREF = VDD 5V 3V Figure 1. RMS Noise 11.5 μV 6.9 μV P-P Noise 76 μV 45 μV P-P Resolution 12 bits 12 bits ENOB 12 bits 12 bits GENERAL DESCRIPTION The AD7170 is a very low power 12-bit analog-to-digital converter (ADC). It contains a precision 12-bit sigma-delta (Σ-Δ) ADC and an on-chip oscillator. Consuming only 135 μA, the AD7170 is particularly suitable for portable or...