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ADS1257 Datasheet 30-kSPS 4-Channel 24-Bit ADC

Manufacturer: Texas Instruments

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General Description

The ADS1257 is a low-noise, 30-kSPS, 24-bit, deltasigma (ΔΣ) analog-to-digital converter (ADC) with an integrated multiplexer (mux), input buffer, and programmable gain amplifier (PGA) in a small 20-pin, 5-mm × 5-mm VQFN package.

The combination of integration, high conversion rate, and 24-bit resolution together in a small package makes the device ideally suited for space-constrained applications.

The input multiplexer accepts either two differential or three single-ended input measurements.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community ADS1257 SBAS656B – SEPTEMBER 2015 – REVISED APRIL 2016 ADS1257 30-kSPS, 4-Channel, 24-Bit ADC with PGA in 5-mm × 5-mm VQFN Package.

Key Features

  • 1 Up to 23-Bits Noise-Free Resolution.
  • Small 5-mm × 5-mm VQFN Package.
  • 4 Analog Inputs.
  • 2 Differential or 3 Single-Ended Measurements.
  • Excellent DC Performance.
  • Offset Drift: 4 nV/°C (Gain = 64).
  • Gain Drift: 0.8 ppm/°C.
  • Nonlinearity: 3 ppm (Gain = 1).
  • Programmable Data Rates: 2.5 SPS to 30 kSPS.
  • Single-Cycle Settled Conversions (≤ 1000 SPS).
  • 50-Hz and 60-Hz Rejection.
  • High Impedance Input.

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