Support software
ADS1235-C-EXAMPLE-CODE — ADS1235 example C code
Expedite your embedded design using this example C code for the ADS1235
ADS1235
24-bit, 7.2-kSPS, 3-ch differential, delta-sigma ADC with PGA and AC excitation for bridge sensors
Data sheet
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.
Technical documentation
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View all 7 | Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | 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 Mar 2024 | |
| Application note | A Basic Guide to Bridge Measurements (Rev. A) | PDF | HTML | 13 Mar 2024 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 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 (Rev. A) | 19 Jun 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
ADS1235EVM — ADS1235 evaluation module
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 (...)
User guide: PDF
Calculation tool
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Calculation tool
SBAR015 — ADS1235 Design Calculator
Supported products & hardware
Design tool
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Supported products & hardware
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
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User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
Ordering & quality
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