ADS1261-Q1
Automotive 24-bit, 40-kSPS, 10-ch, delta-sigma ADC with PGA, VREF, IDACs and AC excitation
ADS1261-Q1
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C, TA
- 24-bit, high-precision ADCs
- Offset drift: 1 nV/°C
- Gain drift: 0.5 ppm/°C
- Noise: 30 nVRMS (20 SPS, gain = 128)
- Linearity: 2 ppm
- CMOS PGA gain: 1 to 128
- Data rate: 2.5 SPS to 40 kSPS
- 2.5-V reference: 4 ppm/°C
- Single-cycle settling mode
- Signal and reference monitors
- 5-V or ±2.5-V power supply
- Internal temperature sensor
- Cyclic redundancy check (CRC)
- Excitation current sources
- Sensor burn-out current sources
- Four general-purpose inputs/outputs
(ADS1261-Q1) - AC excitation for bridge sensors (ADS1261-Q1)
- 5-mm × 5-mm VQFN package
The ADS1260-Q1 and ADS1261-Q1 (ADS126x-Q1) are precision, 40-kSPS, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) that include a programmable gain amplifier (PGA). The devices also include a precision voltage reference and internal fault monitors. The sensor-ready ADCs give a high-accuracy, single-chip solution for the most demanding measurements, for example, weigh scales and resistance temperature detectors (RTDs).
The ADCs contain an input signal multiplexer, a low-noise PGA (with gains from 1 to 128), a 24-bit ΔΣ modulator, a precision voltage reference, and a programmable digital filter.
The high-impedance PGA inputs (1 GΩ) decrease measurement error due to sensor loading. The ADS1260-Q1 supports three differential or five single-ended inputs. The ADS1261-Q1 supports five differential or ten single-ended inputs. The integrated current sources simplify the measurement of RTDs.
The flexible digital filter is programmable for single-cycle settled conversions. Signal and reference monitors, a temperature sensor, and CRC data verification enhance data reliability.
The ADS126x-Q1 are pin compatible devices given in a 5-mm × 5-mm VQFN package and are specified across the –40°C to +125°C temperature range.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS126x-Q1 Automotive Precision, 5-Channel and 10-Channel, 40-kSPS, 24-Bit, Delta-Sigma ADCs With PGA and Monitors datasheet (Rev. A) | PDF | HTML | 16 May 2019 |
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 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
White paper | Automotive On-Board Weighing with ADS1261-Q1 | 09 Jan 2019 | ||
EVM User's guide | ADS1261 and ADS1235 Evaluation Module User's Guide (Rev. A) | 28 Sep 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ADS1261EVM — ADS1261 evaluation module
The ADS1261 evaluation module (EVM) is a platform for evaluating the ADS1261 analog-to-digital converter (ADC). ADS1261 is a low-drift, 24-bit, 40-kSPS, 10-channel delta-sigma (ΔΣ) ADC with an integrated PGA, voltage reference, and internal fault monitors. This sensor-ready ADC provides (...)
ADS1261-C-EXAMPLE-CODE — ADS1261 example C code
Supported products & hardware
Products
Precision ADCs
ADC-DESIGN-CALC — Online design calculator tool for TI Precision ADCs
Supported products & hardware
Products
Precision ADCs
Isolated ADCs
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 (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFNP (RHM) | 32 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.