Overview
The ADS1255IDBT, manufactured by Texas Instruments, is an extremely low-noise, 24-bit analog-to-digital (A/D) converter. This component provides a complete high-resolution measurement solution, making it suitable for the most demanding applications. The converter utilizes a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter, ensuring high accuracy and flexibility. It features a flexible input multiplexer that can handle differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Sampling Rate | Up to 30 kSPS |
| Noise-Free Resolution | Up to 23 bits |
| Nonlinearity | ±0.0010% (max) |
| Input Buffer | Chopper-stabilized |
| 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 | 20-pin SSOP (DB) |
| Operating Temperature Range | -40°C to 85°C |
| Interface | 5V Tolerant SPI-Compatible Serial Interface |
Key Features
- 24 bits, no missing codes
- Up to 23 bits noise-free resolution
- Data output rates to 30 kSPS
- Fast channel cycling
- One-shot conversions with single-cycle settling
- Flexible input multiplexer with sensor detect
- Chopper-stabilized input buffer
- Low-noise PGA: 27 nV input-referred noise
- Self and system calibration for all PGA settings
- Programmable digital filter
Applications
The ADS1255IDBT is designed for high-resolution measurement applications, including but not limited to:
- Industrial automation and control systems
- Medical devices requiring high precision
- Scientific instruments and data acquisition systems
- Aerospace and defense applications
- High-precision test and measurement equipment
Q & A
- What is the resolution of the ADS1255IDBT?
The ADS1255IDBT has a resolution of 24 bits.
- What is the maximum sampling rate of the ADS1255IDBT?
The maximum sampling rate is up to 30 kSPS.
- What is the nonlinearity of the ADS1255IDBT?
The nonlinearity is ±0.0010% (max).
- What type of input buffer does the ADS1255IDBT use?
The ADS1255IDBT uses a chopper-stabilized input buffer.
- What are the gains available for the PGA in the ADS1255IDBT?
The PGA provides gains from 1 to 64 in binary steps.
- What is the power dissipation of the ADS1255IDBT in normal and standby modes?
The power dissipation is as low as 38mW in Normal Mode and 0.4mW in Standby Mode.
- What type of package does the ADS1255IDBT come in?
The ADS1255IDBT is packaged in a 20-pin SSOP (DB).
- What is the operating temperature range of the ADS1255IDBT?
The operating temperature range is -40°C to 85°C.
- What type of interface does the ADS1255IDBT use for communication?
The ADS1255IDBT uses a 5V tolerant SPI-compatible serial interface.
- Does the ADS1255IDBT support self and system calibration?
Yes, the ADS1255IDBT supports self and system calibration for all PGA settings.
