Overview
The ADS1255IDBR, produced by Texas Instruments, is a highly advanced 24-bit analog-to-digital converter (ADC) designed for high-resolution measurement applications. This device is part of the ADS1255 and ADS1256 series, known for their extremely low noise and high precision. The ADS1255IDBR is particularly suited for demanding applications that require accurate and reliable analog-to-digital conversions.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Data Output Rate | Up to 30k samples per second (SPS) |
| Noise-Free Resolution | Up to 23 bits |
| Nonlinearity | ±0.0010% (max) |
| Programmable Gain Amplifier (PGA) | Gains from 1 to 64 in binary steps |
| Analog Supply Voltage | 5V |
| Digital Supply Voltage | 1.8V to 3.6V |
| Power Dissipation | As low as 38mW in Normal Mode, 0.4mW in Standby Mode |
| Package Type | SSOP-20 |
| Interface | SPI-compatible serial interface |
Key Features
- Extremely low noise, 24-bit delta-sigma analog-to-digital converter
- Programmable digital filter allowing trade-offs between resolution and data rate
- Flexible input multiplexer with differential or single-ended signal handling and sensor detect circuitry
- Selectable input buffer to increase input impedance
- Low-noise programmable gain amplifier (PGA) with gains from 1 to 64
- Fast channel cycling and one-shot conversions with single-cycle settling
- Onboard calibration for self and system correction of offset and gain errors
- Bidirectional digital I/Os and programmable clock output driver
- Chopper-stabilized input buffer to enhance input impedance
Applications
- High-resolution measurement systems
- Industrial process control and automation
- Medical devices requiring precise analog-to-digital conversions
- Aerospace and defense applications where low noise and high precision are critical
- Test and measurement equipment
- Automotive systems requiring accurate sensor data
Q & A
- What is the resolution of the ADS1255IDBR?
The ADS1255IDBR has a 24-bit resolution.
- What are the data output rates of the ADS1255IDBR?
The data output rates can go up to 30k samples per second (SPS).
- What is the maximum nonlinearity of the ADS1255IDBR?
The maximum nonlinearity is ±0.0010%.
- What are the gains available in the PGA of the ADS1255IDBR?
The PGA provides gains from 1 to 64 in binary steps.
- What is the power dissipation of the ADS1255IDBR in normal and standby modes?
In normal mode, it is as low as 38mW, and in standby mode, it is 0.4mW.
- What type of interface does the ADS1255IDBR use for communication?
The ADS1255IDBR uses an SPI-compatible serial interface.
- Does the ADS1255IDBR support onboard calibration?
Yes, it supports self and system calibration for offset and gain errors.
- What is the purpose of the sensor detect circuitry in the ADS1255IDBR?
The sensor detect circuitry verifies the integrity of the external sensor connected to the inputs.
- Can the ADS1255IDBR perform one-shot conversions?
Yes, it can perform one-shot conversions that settle in just a single cycle.
- What is the package type of the ADS1255IDBR?
The ADS1255IDBR is packaged in an SSOP-20.
