Overview
The ADS1261BQWRHMRQ1 is a precision, 24-bit, delta-sigma analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS126x-Q1 family, which includes the ADS1260-Q1 and ADS1261-Q1 models. The ADS1261-Q1 is specifically designed for high-accuracy measurements and is AEC-Q100 qualified for automotive applications, ensuring reliability across a wide temperature range of –40°C to +125°C.
The ADC features a programmable gain amplifier (PGA), a precision voltage reference, and internal fault monitors, making it a comprehensive solution for demanding measurement tasks such as those in battery management systems, weight and pressure measurements, and temperature measurements.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 24-bit |
| Data Rate | 2.5 SPS to 40 kSPS |
| PGA Gain | 1 to 128 |
| Offset Drift | 1 nV/°C |
| Gain Drift | 0.5 ppm/°C |
| Noise | 30 nVRMS (20 SPS, gain = 128) |
| Linearity | 2 ppm |
| Reference Voltage | 2.5-V, 4 ppm/°C |
| Power Supply | 5-V or ±2.5-V |
| Package | 5-mm × 5-mm VQFN-32 |
| Temperature Range | –40°C to +125°C |
| Input Channels | Five differential or ten single-ended inputs |
Key Features
- High-impedance PGA inputs (1 GΩ) to minimize measurement error due to sensor loading.
- Integrated current sources for simplified measurement of resistance temperature detectors (RTDs).
- Flexible digital filter programmable for single-cycle settled conversions.
- Signal and reference monitors, internal temperature sensor, and cyclic redundancy check (CRC) for enhanced data reliability.
- AC excitation for bridge sensors and sensor burn-out current sources.
- Four general-purpose inputs/outputs.
- Single-cycle settling mode for fast conversion times.
Applications
- High-resolution current-shunt measurements in battery management systems (BMS).
- Weight and pressure measurements.
- Temperature measurements, including resistance temperature detectors (RTDs).
- Weigh scales and other precision measurement applications.
Q & A
- What is the resolution of the ADS1261BQWRHMRQ1 ADC?
The ADS1261BQWRHMRQ1 has a 24-bit resolution.
- What is the data rate range of the ADS1261BQWRHMRQ1?
The data rate ranges from 2.5 SPS to 40 kSPS.
- What are the PGA gain options for the ADS1261BQWRHMRQ1?
The PGA gain can be set from 1 to 128.
- What is the temperature range for the ADS1261BQWRHMRQ1?
The device operates across a temperature range of –40°C to +125°C.
- What types of inputs does the ADS1261BQWRHMRQ1 support?
The device supports five differential or ten single-ended inputs.
- Does the ADS1261BQWRHMRQ1 have integrated current sources?
- What is the package type and size of the ADS1261BQWRHMRQ1?
The device is packaged in a 5-mm × 5-mm VQFN-32 package.
- Does the ADS1261BQWRHMRQ1 support AC excitation for bridge sensors?
- What additional features enhance data reliability in the ADS1261BQWRHMRQ1?
The device includes signal and reference monitors, an internal temperature sensor, and cyclic redundancy check (CRC) for enhanced data reliability.
- Is the ADS1261BQWRHMRQ1 AEC-Q100 qualified?
