ADS1287IRHFR

ADS1287 Low-Power Delta-Sigma ADC

Texas Instruments ADS1287 Low-Power Delta-Sigma Analog-to-Digital Converter (ADC) is a low-power, analog-to-digital converter (ADC). The device includes an integrated programmable gain amplifier (PGA) and a finite-impulse-response (FIR) digital filter. The ADC is suitable for the demanding needs of seismic equipment requiring precision digitizing with low-power consumption. The ADC features a programmable-gain, high-impedance complementary metal-oxide semiconductor (CMOS) amplifier. The ADC is suitable for a direct connection of geophone and hydrophone sensors to the ADC over a wide range of input signals (±2.5V to ±0.156V). The ADC incorporates a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator. The modulator's digital output is filtered and decimated by the internal FIR digital filter to yield the ADC conversion result. The FIR digital filter provides data rates up to 1000 samples per second (SPS). The high-pass filter (HPF) removes DC and low-frequency components from the conversion result. On-chip gain and offset scaling registers support system calibration. Together, the amplifier, modulator, and digital filter dissipate 4.5mW in high-resolution mode (2.4mW in low-power mode).