ADS1283IRH Texas Instruments Integrated Circuits (IC) Data Acquisition - Analog to Digital Converters (ADC) AD1283A ADS1283B ADS1283

Specifications:

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 onchip 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 highpass 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:

1• 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

Applications

• Energy Exploration

• Seismic Monitoring

• High-Accuracy Instrumentation

Texas Instruments Integrated Circuits (IC) Data Acquisition - Analog to Digital Converters (ADC)AD1283 Device Comparison:

PART NUMBER OFFSET OPTION THD (TYP) GAIN

ADS1283 100 mV –122 dB 1 to 64

ADS1283A 100 mV –118 dB 1, 4, 16

ADS1283B 75 mV, 100 mV –122 dB 1 to 64

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