|Package | PIN:||PW | 28|
|Temp:||I (-40 to 85)|
- High Resolution:
130-dB SNR (250 SPS)
- High Accuracy:
THD: –122 dB
INL: 0.5 ppm
- Low-Noise PGA
- Two-Channel Input Mux
- Inherently-Stable Modulator with Fast Responding
- Flexible Digital Filter:
Sinc + FIR + IIR (Selectable)
Linear or Minimum Phase Response
Programmable High-Pass Filter
Selectable FIR Data Rates: 250 SPS
to 4 kSPS
- Filter Bypass Option
- Low Power Consumption: 25 mW
Shutdown: 10 µW
- Offset and Gain Calibration Engine
- SYNC Input
- Analog Supply:
Unipolar (+5 V) or Bipolar (±2.5 V)
- Digital Supply: 1.8 V to 3.3 V
Texas Instruments ADS1282IPW
The ADS1282 is an extremely high-performance, single-chip analog-to-digital converter (ADC) with an integrated, low-noise programmable gain amplifier (PGA) and two-channel input multiplexer (mux). The ADS1282 is suitable for the demanding needs of energy exploration and seismic monitoring environments.
The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post processing filters.
The flexible input MUX provides an additional external input for measurement, as well as internal self-test connections. The PGA features outstanding low noise (5 nV/√Hz) and high input impedance, allowing easy interfacing to geophones and hydrophones over a wide range of gains.
The digital filter provides selectable data rates from 250 to 4000 samples per second (SPS). The high-pass filter (HPF) features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.
The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1282s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.
Together, the amplifier, modulator, and filter dissipate 25 mW. The ADS1282 is available in a compact TSSOP-28 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.