Overview
The ADS1261IRHBR, produced by Texas Instruments, is a high-precision, 24-bit delta-sigma analog-to-digital converter (ADC) designed for demanding sensor applications. This device is part of the ADS126x family and offers a comprehensive, single-chip solution for accurate measurements. It includes a programmable gain amplifier (PGA), a precision voltage reference, and internal fault monitors, making it ideal for applications such as weigh scales, resistance temperature detectors (RTDs), and other precision measurement tasks.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 bits | |
| Data Rate | 2.5 SPS to 40 kSPS | |
| PGA Gain | 1 to 128 | V/V |
| Input Voltage Range | ±7 mV to ±5 V | V |
| Offset Drift | 1 nV/°C | |
| Gain Drift | 0.5 ppm/°C | |
| Noise | 30 nV RMS (20 SPS, gain = 128) | |
| Linearity | 2 ppm | |
| Power Supply | 5 V or ±2.5 V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package | VQFN (RHB) with 32 pins | |
| Package Size | 5-mm × 5-mm |
Key Features
- High-precision 24-bit delta-sigma ADC
- Programmable gain amplifier (PGA) with gains from 1 to 128
- Wide input voltage range: ±7 mV to ±5 V
- Simultaneous 50-Hz and 60-Hz rejection mode
- Single-cycle settling mode
- Signal and reference monitors
- Internal temperature sensor
- Cyclic redundancy check (CRC) for data verification
- Excitation current sources and sensor burn-out current sources
- Four general-purpose inputs/outputs
- AC excitation for bridge sensors
- High-impedance PGA inputs (1 GΩ) to reduce measurement error due to sensor loading
Applications
- PLC analog input modules
- Weigh scales and strain-gauge digitizers
- Temperature and pressure measurement
- Lab instrumentation
- Process analytics
Q & A
- What is the resolution of the ADS1261IRHBR ADC?
The ADS1261IRHBR has a 24-bit resolution.
- What is the data rate range of the ADS1261IRHBR?
The data rate range is from 2.5 SPS to 40 kSPS.
- What are the gain settings available for the PGA in the ADS1261IRHBR?
The PGA gain can be set from 1 to 128.
- What is the input voltage range for the ADS1261IRHBR?
The input voltage range is ±7 mV to ±5 V.
- Does the ADS1261IRHBR support simultaneous 50-Hz and 60-Hz rejection?
- What type of power supply does the ADS1261IRHBR support?
The device supports a 5 V or ±2.5 V power supply.
- What is the operating temperature range for the ADS1261IRHBR?
The operating temperature range is -40°C to 125°C.
- What package type and size does the ADS1261IRHBR come in?
The device comes in a VQFN (RHB) package with 32 pins and is 5-mm × 5-mm in size.
- Does the ADS1261IRHBR have internal temperature and signal monitors?
- What kind of data verification does the ADS1261IRHBR support?
The device supports cyclic redundancy check (CRC) for data verification.
