ADS1283 Ultra-High Resolution, 4kSPS, 2-Ch Delta-Sigma ADC With PGA for Seismic and Energy Exploration | TI.com

ADS1283 (ACTIVE)

Ultra-High Resolution, 4kSPS, 2-Ch Delta-Sigma ADC With PGA for Seismic and Energy Exploration

 

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Description

The ADS1283 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 ADS1283 is suitable for the demanding needs of seismic monitoring equipment.

The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The modulator digital output is digitally filtered and decimated by the on-chip digital filter to yield the ADC conversion result.

The flexible input mux provides an additional external input for measurement, as well as internal self-test input connections. The PGA features outstanding low noise (5 nV/√Hz) and very-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 ADS1283 devices.

The ADS1283 is available in a compact 24-lead, 5-mm × 4-mm VQFN package, and is fully specified from –40°C to +85°C, with a maximum operating temperature range of –50°C to +125°C.

Features

  • High Resolution:
    • SNR: 130 dB (250 SPS, PGA = 1)
  • High Accuracy:
    • THD: –122 dB
  • Low Power Consumption:
    • 18 mW (PGA = 1, 2, 4, or 8)
    • Shutdown Mode: 10 µW
  • Low-Noise PGA: 5 nV/√Hz
  • Two-Channel Input Multiplexer
  • Inherently-Stable Modulator With Fast Responding Overrange Detector
  • 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
  • Offset and Gain Calibration Engine
  • SYNC Input
  • Analog Supply: 5 V or ±2.5 V
  • Digital Supply: 1.8 V to 3.3 V

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Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) SNR (dB) THD (Typ) (dB) Rating
ADS1283 Order now 31     4     2     SPI     -40 to 85     VQFN | 24       18     24VQFN: 20 mm2: 4 x 5 (VQFN | 24)     Delta-Sigma     Differential     Multiplexed     Ext     PGA     2.5     0.039     -2.5
0    
2.5
5    
1.65     3.6     130     -122     Catalog    
ADS1281 Order now 31     4     1     SPI     -40 to 85     TSSOP | 24     31.63 | 1ku     12     24TSSOP: 34 mm2: 4.4 x 7.8 (TSSOP | 24)     Delta-Sigma     Differential    
   
Ext    
   
2.5     2.5     -2.5
0    
2.5
5    
1.65     3.6     130     -122     Catalog    
ADS1282 Order now 31     4     2     SPI     -40 to 85     TSSOP | 28     34.50 | 1ku     25     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)     Delta-Sigma     Differential     Multiplexed     Ext     PGA     2.5     0.039     -2.5
0    
2.5
5    
1.65     3.6     130     -122     Catalog    
ADS1284 Order now 31     4     2     SPI     -40 to 85     VQFN | 24       12     24VQFN: 20 mm2: 4 x 5 (VQFN | 24)     Delta-Sigma     Differential     Multiplexed     Ext     PGA     2.5