ADS1282 (正在供货)

用于地震监测和能源勘探且具有 PGA 的超高分辨率 Δ-Σ ADC

用于地震监测和能源勘探且具有 PGA 的超高分辨率 Δ-Σ ADC - ADS1282
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描述

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.

特性

  • 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
    Overrange Detection
  • 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

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参数 与其它产品相比 精密 ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
THD (Typ) (dB)
SNR (dB)
Reference Mode
ADS1282 ADS1281 ADS1287 ADS1287D
31    31    24    24   
4000    4000    1000    1000   
1    1    1    2   
Differential    Differential    Differential    Differential   
25    12    4.5    4.4   
-1.9
0.7   
-2.7
0   
  -1.6
1   
1.4
4   
2.75
5.35   
  1.4
4   
Serial    Serial    SPI    SPI   
N/A    N/A    PGA    N/A   
-2.5
0   
-2.5
0   
-2.5
0   
-2.5
0   
2.5
5   
2.5
5   
2.5
5   
2.5
5   
Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma   
-40 to 85    -40 to 85    -40 to 85    -40 to 85   
28TSSOP    24TSSOP    24VQFN    32VQFN   
-122    -122    -115    -115   
130    130    116    114   
Ext    Ext    Ext    Ext   

其它合格版本 ADS1282

版本 器件型号 定义
高温 ADS1282-HT 用于严苛环境下的高温产品
宇航 ADS1282-SP 抗辐射、陶瓷封装,适用于太空应用

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