Texas Instruments ADS1281
The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications. The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance.| Part No. | ADS1281 |
|---|---|
| Datasheet | ADS1281 Download |
| Manufacturer |  Texas Instruments |
| Description | ADC |
| Buy | Stock & Price |
FEATURES
1●2 High Resolution: – 130dB SNR (250SPS) – 127dB SNR (500SPS)
● High Accuracy: – THD: –122dB (typ), –115dB (max) – INL: 0.6ppm
● Inherently Stable Modulator with Fast Responding Over-Range Detection
● Flexible Digital Filter: – Sinc + FIR + IIR (Selectable) – Linear or Minimum Phase Response – Programmable High-Pass Filter – Selectable FIR Data Rates: – 250SPS to 4kSPS
● Filter Bypass Option
● Low Power Consumption: – Operating: 12mW – Shutdown: 10mW
● Calibration Engine for Offset and Gain Correction
● SYNC Input
● Analog Supply: – Unipolar (+5V) or Bipolar (±2.5V)
● Digital Supply: 1.8V to 3.3V
APPLICATIONS
● Energy Exploration● Seismic Monitoring
● High-Accuracy Instrumentation
DESCRIPTION
The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters. The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage.
