Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| ADC | 12-bit noise-free delta-sigma |
| Inputs | 4 single-ended or 2 differential |
| Rate | 128 SPS to 3.3 kSPS |
| PGA | Integrated programmable gain amplifier |
| Interface | SPI |
| Temperature | Internal sensor, 2°C max stated error |
| Supply / Current | 2.0 V to 5.5 V; 150 µA continuous; auto power-down single-shot |
| Exact Package / Packing | VSSOP (DGS), 10 pins; 2500-piece large reel |
Product Overview
ADS1018IDGSR combines the ADS101x low-power delta-sigma architecture with SPI and an internal temperature sensor. That makes it especially useful for thermocouple front ends where one ADC reads the thermocouple voltage and the on-chip sensor estimates local cold-junction temperature.
The internal temperature sensor measures die/local board temperature, so cold-junction accuracy depends on package placement and thermal gradients between the connector and ADC. Software calibration/thermal design remain part of a good thermocouple system.
Compared with ADS1015, the interface changes from I²C to SPI and the key extra function is temperature sensing rather than comparator/address flexibility.
For related devices, see HKEQGOO’s ADCs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ADS1018IDGSR |
| ADC | 12-bit noise-free delta-sigma |
| Inputs | 4 single-ended or 2 differential |
| Rate | 128 SPS to 3.3 kSPS |
| PGA | Integrated programmable gain amplifier |
| Interface | SPI |
| Temperature | Internal sensor, 2°C max stated error |
| Supply / Current | 2.0 V to 5.5 V; 150 µA continuous; auto power-down single-shot |
| Exact Package / Packing | VSSOP (DGS), 10 pins; 2500-piece large reel |
| Manufacturer Status | Active / Production |
| Part Marking | BTNQ |
Functional Highlights
Integrated temperature sensing can simplify cold-junction compensation
It eliminates a separate local temperature IC only when the ADC is thermally representative of the connector/reference junction.
SPI gives deterministic point-to-point timing
It avoids I²C addressing and shared-bus pull-up constraints, but consumes more controller pins.
Design Considerations
- Place the ADC thermally close to the cold-junction connector if using the internal sensor for compensation.
- Use low-noise differential routing and PGA range appropriate to the thermocouple/sensor signal.
- Account for delta-sigma data-rate/filter latency in control timing.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ADS1018IDGSR as Active / Production; VSSOP (DGS), 10 pins; 2500-piece large tape and reel; −40°C to +125°C; marking BTNQ.
Related Engineering Resources
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