Overview
The ADS1256IDBT from Texas Instruments is an extremely low-noise, 24-bit analog-to-digital (A/D) converter designed to provide high-resolution measurement solutions for demanding applications. This converter is part of the ADS1255 and ADS1256 series, which are known for their high precision and versatility. The ADS1256IDBT is packaged in a 28-pin SSOP (DB) package and operates over a temperature range of -40°C to 85°C.
The device features a 4th-order delta-sigma (ΔΣ) modulator followed by a programmable digital filter, allowing for flexible input configurations and high-resolution data output. It supports both differential and single-ended inputs, along with a chopper-stabilized input buffer and a low-noise programmable gain amplifier (PGA).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | - |
| Noise-Free Resolution | Up to 23 Bits | - |
| Nonlinearity (max) | ±0.0010% | - |
| Data Output Rates | Up to 30k SPS | - |
| PGA Gains | 1 to 64 in binary steps | - |
| Analog Supply | 5V | V |
| Digital Supply | 1.8V to 3.6V | V |
| Power Dissipation (Normal Mode) | As low as 38mW | mW |
| Power Dissipation (Standby Mode) | 0.4mW | mW |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | SSOP (DB) 28 pins | - |
Key Features
- 24 Bits, No Missing Codes
- Up to 23 Bits Noise-Free Resolution
- ±0.0010% Nonlinearity (max)
- Data Output Rates to 30k SPS
- Fast Channel Cycling
- One-Shot Conversions with Single-Cycle Settling
- Flexible Input Multiplexer with Sensor Detect
- Four Differential Inputs and Eight Single-Ended Inputs
- Chopper-Stabilized Input Buffer
- Low-Noise PGA: 27nV Input-Referred Noise
- Self and System Calibration for All PGA Settings
- 5V Tolerant SPI-Compatible Serial Interface
- Bidirectional Digital I/Os and Programmable Clock Output Driver
Applications
- Scientific Instrumentation
- Industrial Process Control
- Medical Equipment
- Test and Measurement
- Weigh Scales
Q & A
- What is the resolution of the ADS1256IDBT?
The ADS1256IDBT has a resolution of 24 bits with no missing codes.
- What are the data output rates of the ADS1256IDBT?
The data output rates can go up to 30k samples per second (SPS).
- What is the nonlinearity of the ADS1256IDBT?
The nonlinearity is ±0.0010% (max).
- What are the PGA gain settings available on the ADS1256IDBT?
The PGA gains range from 1 to 64 in binary steps.
- What is the power dissipation 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 serial interface does the ADS1256IDBT use?
The device uses a 5V tolerant SPI-compatible serial interface.
- What are the analog and digital supply voltages for the ADS1256IDBT?
The analog supply is 5V, and the digital supply is 1.8V to 3.6V.
- Does the ADS1256IDBT support self and system calibration?
- What types of inputs does the ADS1256IDBT support?
- What is the operating temperature range of the ADS1256IDBT?
