Automotive 24-bit, 40-kSPS, 10-ch, delta-sigma ADC with PGA, VREF, IDACs and AC excitation
Product details
Parameters
Package | Pins | Size
Features
- 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
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Description
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 | |
---|---|---|---|
* | Datasheet | ADS126x-Q1 Automotive Precision, 5-Channel and 10-Channel, 40-kSPS, 24-Bit, Delta-Sigma ADCs With PGA and Monitors datasheet (Rev. A) | May 16, 2019 |
E-book | Fundamentals of Precision ADC Noise Analysis | Jun. 19, 2020 | |
White paper | Automotive On-Board Weighing with ADS1261-Q1 | Jan. 09, 2019 | |
User guide | ADS1261 and ADS1235 Evaluation Module User's Guide (Rev. A) | Sep. 28, 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 (...)
Features
- Includes all required support circuitry for ADS1261
- Delta-Sigma ADC EvaluaTIon Software (DELTASIGMAEVAL-GUI) enables quick configuration and analysis
- Configurable inputs, references, and supplies
- Easily-accessible signals via test points and headers
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RHM) | 32 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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