ADS1282-SP - High-Resolution Analog-to-Digital Converter

The ADS1282-SP is a radiation-tolerant extremely high-performance,single-chip analog-to-digital converter (ADC) with an integrated, low-noise programmable gainamplifier (PGA) and two-channel input multiplexer (MUX). ADS1282-SP is suitable for the demandingneeds of space applications providing ultra-precision performance while maintaining radiationtolerance suitable for a large variety of satellites, payloads, sensing and other harsh environmentapplications.

The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator thatprovides outstanding noise and linearity performance. The modulator is used either in conjunctionwith 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 asinternal self-test connections. The PGA features outstanding low noise (5nV/√Hz) and high input impedance, allowing easy interfacing totransducersover 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 offsetscaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multipleADS1282s. The SYNC input also accepts a clock input for continuous alignment of conversions from anexternal source.

Together, the amplifier, modulator, and filter dissipate 30 mW. The ADS1282-SP is fullyspecified from –55°C to 125°C.

• QMLV (QML Class V) MIL-PRF-38535 Qualified and Radiation Hardness Assured (RHA), SMD 5962-14231
  • 5962L1423101VXC - Qualified over the Military Temperature Range (–55°C to 125°C)
  • 5962L1423102VXC - Qualified over Reduced Temperature Range (–55°C to 115°C) for Improved Dynamic Performance
• 5962L14231:
  • Radiation Hardness Assurance (RHA) up to Total Ionizing Dose (TID) 50 kRAD (Si)
  • Single Event Latchup (SEL) Immune to LET = 50 MeV-cm²/mg at 125°C
  • Single Event Latchup (SEL) Immune to LET = 60 MeV-cm²/mg at 85°C
• High Resolution: 124-dB SNR (1000 SPS)
• High Accuracy: THD: –102 dB
  INL: 0.5 ppm
• Low-Noise PGA
• Two-Channel Input MUX
• 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:
    250 SPS to 4 kSPS
• Filter Bypass Option
• Low-Power Consumption: 25 mW
• Offset and Gain Calibration Engine
• SYNC Input
• Analog Supply: Unipolar (5 V) or Bipolar (±2.5 V)
• Digital Supply: 1.75 to 3.3 V

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