ADS1235
Differenzieller Delta-Sigma-ADC, 24 Bit, 7,2 kSPS, 3 Kanäle, mit PGA und AC-Anregung für Brückensens
ADS1235
- 24-Bit, High-Precision ADC
- 120,000 Noise-Free Counts
(10-mV Input, 10 SPS) - Offset Drift: 1 nV/°C
- Gain Drift: 0.5 ppm/°C
- 120,000 Noise-Free Counts
- Three Differential or Five Single-Ended Inputs
- Two Reference Inputs
- Wide Input Voltage Range: ±7 mV to ±5 V
- Low-Noise PGA, Gain: 1, 64, and 128
- Data Rate: 2.5 SPS to 7200 SPS
- AC- or DC-Bridge Excitation Option
- Chop Mode for Zero Drift Operation
- Simultaneous 50-Hz and 60-Hz Rejection Mode
- Single-Cycle Settling Mode
- Missing Reference Input Monitor
- Signal Overrange Monitor
- Temperature Sensor
- Cyclic Redundancy Check (CRC)
- 5-V or ±2.5-V Power Supply
The ADS1235 is a precision, 7200-SPS, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). This device also includes diagnostic features such as PGA overrange and reference monitors. The ADC provides high-accuracy, zero-drift conversion data for high-precision equipment, including weigh scales, strain gauges, and resistive pressure sensors.
The ADC has signal and reference multiplexers that support three differential signal inputs and two reference inputs. The ADC also includes a low-noise PGA that provides gains of 1, 64, and 128. The ADC also has a 24-bit ΔΣ modulator and programmable digital filter.
The high-impedance inputs (1 GΩ) of the PGA reduce measurement error that is caused by sensor loading.
The ADC supports ac-bridge excitation to remove the drift errors from the sensor wiring. The ADC provides the clock control signals for the ac-excitation operation.
The flexible digital filter is programmable for single-cycle settled conversions, and provides 50-Hz and 60-Hz line cycle rejection at the same time.
The ADS1235 is available in a 5-mm × 5-mm QFN package, and is specified across the –40°C to +125°C temperature range.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet | PDF | HTML | 28 Sep 2018 |
Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 18 Mär 2024 | |
Application note | A Basic Guide to Bridge Measurements (Rev. A) | PDF | HTML | 13 Mär 2024 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mär 2023 | |
Application note | Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) | PDF | HTML | 23 Aug 2021 | |
Application brief | Reduce Bridge Measurement Offset and Drift Using the AC Excitation Mode (Rev. A) | PDF | HTML | 01 Apr 2021 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
EVM User's guide | ADS1261 and ADS1235 Evaluation Module User's Guide (Rev. A) | 28 Sep 2018 |
Design und Entwicklung
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ADS1235EVM — ADS1235-Evaluierungsmodul
The ADS1235 evaluation module (EVM) is a platform for evaluating the ADS1235 analog-to-digital converter (ADC). ADS1235 is a low-drift, 24-bit, 7200-SPS, 6-channel delta-sigma (ΔΣ) ADC with an integrated PGA for low-noise bridge measurements. This sensor-ready ADC provides a (...)
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
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VQFN (RHB) | 32 | Ultra Librarian |
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