Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Resolution | 24 bits, no missing codes across stated rates/PGA settings |
| Data Rate | Up to 30 kSPS |
| Noise | Up to 23 bits noise-free stated; 27 nV input-referred PGA noise stated |
| Input | Single precision differential converter path in ADS1255 variant |
| PGA / Calibration | Low-noise PGA plus self and system calibration |
| Supplies | 5 V analog; 1.8 V to 3.6 V digital |
| Interface | 5-V-tolerant SPI-compatible digital input interface |
| Exact Package / Packing | SSOP (DB), 20 pins; 1000-piece large reel; marking ADS1255IDB |
Product Overview
ADS1255IDBR targets instrumentation where both very low noise and tens-of-kilosamples-per-second bandwidth are required. Its 30-kSPS ceiling is far above slow sensor ADCs while retaining a 24-bit delta-sigma signal path and programmable gain.
The ADS1255 is the single-input-path member; the related ADS1256 adds a larger analog input multiplexer. That distinction matters when one dedicated precision channel is more valuable than internal channel scanning.
A 5 V analog supply combined with a lower-voltage digital rail separates analog dynamic range from processor I/O voltage. Self/system calibration helps compensate converter and external signal-chain gain/offset under controlled calibration conditions.
For related devices, see HKEQGOO’s ADCs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ADS1255IDBR |
| Resolution | 24 bits, no missing codes across stated rates/PGA settings |
| Data Rate | Up to 30 kSPS |
| Noise | Up to 23 bits noise-free stated; 27 nV input-referred PGA noise stated |
| Input | Single precision differential converter path in ADS1255 variant |
| PGA / Calibration | Low-noise PGA plus self and system calibration |
| Supplies | 5 V analog; 1.8 V to 3.6 V digital |
| Interface | 5-V-tolerant SPI-compatible digital input interface |
| Exact Package / Packing | SSOP (DB), 20 pins; 1000-piece large reel; marking ADS1255IDB |
| Manufacturer Status | Active / Production |
| Part Marking | ADS1255IDB |
Functional Highlights
Low noise at kSPS rates fits laboratory and industrial instrumentation
This device occupies a different performance space from 10–80-SPS bridge ADCs: faster dynamic signals can be captured without dropping to SAR-class code depth.
System calibration can include external path errors
Calibration commands can compensate more than internal offset/gain when the board provides suitable known input/reference conditions.
Design Considerations
- Use a low-jitter clock and low-noise reference/supply to preserve high-rate noise performance.
- Separate analog and digital return currents around the 5 V analog / low-voltage digital domains.
- Do not assume ADS1256 mux features exist on the ADS1255 single-channel variant.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ADS1255IDBR as Active / Production; SSOP (DB), 20 pins; 1000-piece large tape and reel; −40°C to +85°C; marking ADS1255IDB.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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