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ADS1257

Texas Instruments
Part Number ADS1257
Manufacturer Texas Instruments
Description 30-kSPS 4-Channel 24-Bit ADC
Published Oct 18, 2019
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community ADS1257 SBAS656B – SEPTEMBER 2...
Datasheet PDF File ADS1257 PDF File

ADS1257
ADS1257

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 1 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 Buffer • Differential-Input PGA • Integrated Sensor Break Detection • 2 General-Purpose Input/Outputs • Power Supplies: – Analog: 5 V – Digital: 1.
8 V to 3.
6 V • 5-V Tolerant SPI™-Compatible Serial Interface 2 Applications • Factory Automation and Process Control • Test and Measurement • Medical Equipment • Scientific Instrumentation 3 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.
The sensorbreak detection circuit verifies the input connection continuity to the ADC.
The selectable input buffer greatly increases the input impedance, and in many cases, eliminates the need for external buffers.
The buffer input voltage range includes AGND.
The lownoise PGA provides gains from 1 to 64 to accommodate a wide range of inputs signals.
The programmable digital filter optimizes ADC resolution (up to 23 bits noise-free) and conversion rates (up to 30 kSPS).
The digital filter provides single-cycl...


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