Support software
ADS1246
24-Bit, 2kSPS, 1-Ch Delta-Sigma ADC With PGA for Precision Sensor Measurement
Data sheet
ADS1246
- 24 Bits, No Missing Codes
- Programmable Data Rates Up to 2 kSPS
- Single-Cycle Settling for All Data Rates
- Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
- Analog Multiplexer With 8 (ADS1248) and 4
(ADS1247) Independently Selectable Inputs - Low-Noise PGA: 48 nVRMS at PGA = 128
- Dual-Matched Programmable Excitation Current Sources
- Low-Drift Internal 2.048-V Reference:
10 ppm/°C (Maximum) - Sensor Burn-Out Detection
- 4 or 8 General-Purpose I/Os (ADS1247, ADS1248)
- Internal Temperature Sensor
- Power Supply and VREF Monitoring (ADS1247, ADS1248)
- Self and System Calibration
- SPI™-Compatible Serial Interface
- Analog Supply: Unipolar (2.7 V to 5.25 V) and Bipolar (±2.5 V) Operation
- Digital Supply: 2.7 V to 5.25 V
- Operating Temperature –40°C to 125°C
- APPLICATIONS
- Temperature Sensor Measurements:
- RTDs, Thermocouples, and Thermistors
- Pressure Measurements
- Flow Meters
- Factory Automation and Process Controls
- Temperature Sensor Measurements:
All other trademarks are the property of their respective owners
The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The devices feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a built-in, very low drift voltage reference with 10-mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The devices provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).
An input multiplexer supports four differential inputs for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a sensor burn-out detect, voltage bias for thermocouples, system monitoring, and general-purpose digital I/Os (ADS1247 and ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The ΔΣ modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.
Technical documentation
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View all 8 | Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | ADS124x 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement datasheet (Rev. H) | PDF | HTML | 31 Mar 2016 |
| Application note | K-type thermocouple measurement circuit with precision ADC (Rev. A) | PDF | HTML | 20 Sep 2024 | |
| 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 Thermocouple Measurements (Rev. A) | PDF | HTML | 29 Mar 2023 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
| E-book | Fundamentals of Precision ADC Noise Analysis (Rev. A) | 19 Jun 2020 | ||
| E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 19 Mar 2015 | ||
| Application note | Inputs Currents for High-Resolution ADCs | 06 Mar 2003 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
ADS1248EVM-PDK — ADS1248 performance demonstration kit for 24-bit, 2-kSPS, eight-channel delta-sigma ADC
The ADS1248 evaluation module (EVM) performance demonstration kit (PDK) is an platform for evaluating the ADS1248 eight-channel, 24-bit, high-precision delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM is designed to easily accept many types of analog temperature sensors, (...)
Calculation tool
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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 (...)
Supported products & hardware
Design tool
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
Ordering & quality
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