Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Resolution / Rate | 16-bit; programmable data rate up to 2 kSPS |
| Inputs | 4 single-ended or 2 differential |
| PGA | Gain 1 to 128 |
| Excitation | Two matched programmable current sources, 50 µA to 1.5 mA |
| Reference | Internal 2.048 V reference, 5 ppm/°C typical drift stated |
| Integrated | Oscillator and temperature sensor |
| Interface | SPI-compatible |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large reel; marking ADS1120 |
Product Overview
ADS1120IPWR is a sensor-front-end ADC rather than a bare converter. The mux, low-noise PGA, reference and two programmable excitation-current sources can directly support RTDs, resistive bridges and industrial transmitters with fewer external analog blocks.
The two IDACs are particularly useful for ratiometric RTD measurements: one or both current sources can excite the sensor/reference network while the ADC measures the resulting differential voltage. Matching and routing of the excitation path then become part of system accuracy.
ADS1120 provides 16-bit conversion up to 2 kSPS and reaches 16-bit noise-free performance at low data rate according to TI. The PWR code is the active 2000-piece TSSOP reel.
For related devices, see HKEQGOO’s ADCs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ADS1120IPWR |
| Resolution / Rate | 16-bit; programmable data rate up to 2 kSPS |
| Inputs | 4 single-ended or 2 differential |
| PGA | Gain 1 to 128 |
| Excitation | Two matched programmable current sources, 50 µA to 1.5 mA |
| Reference | Internal 2.048 V reference, 5 ppm/°C typical drift stated |
| Integrated | Oscillator and temperature sensor |
| Interface | SPI-compatible |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large reel; marking ADS1120 |
| Manufacturer Status | Active / Production |
| Part Marking | ADS1120 |
Functional Highlights
Dual IDACs can eliminate separate precision excitation sources
Programmable sensor current from tens of microamps to 1.5 mA supports RTD lead compensation, burnout checks and different sensor resistances.
50/60-Hz rejection is available at low-rate precision settings
Industrial mains rejection and single-cycle settling can matter more than headline 2-kSPS speed in process sensors.
Design Considerations
- Select IDAC current from sensor self-heating as well as ADC signal amplitude.
- Route reference and sensor excitation ratiometrically when possible.
- Use input filtering that settles within the selected digital-filter conversion behavior.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ADS1120IPWR as Active / Production; TSSOP (PW), 16 pins; 2000-piece large tape and reel; −40°C to +125°C; marking ADS1120.
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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