Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Resolution / Rate | 24-bit delta-sigma; up to 2 kSPS |
| Effective Resolution | Up to 20 effective bits stated by TI |
| Inputs | 4 single-ended or 2 differential |
| PGA | Gain 1 to 128 |
| Excitation | Two matched current sources, 10 µA to 1.5 mA |
| Reference | Internal 2.048 V reference, 5 ppm/°C typical drift |
| Integrated | Oscillator and temperature sensor; SPI interface |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2500-piece large reel; marking ADS1220 |
Product Overview
ADS1220IPWR is the 24-bit member of the compact ADS12x0 sensor ADC architecture. It combines four-input muxing, a low-noise PGA, internal reference and two programmable excitation currents for precision resistance, bridge and low-level sensor measurement.
The extra nominal code width over ADS1120 is useful only if the sensor, reference, PCB leakage/noise and excitation network support it. TI specifies up to about 20 effective bits rather than implying that every 24-bit output code is noise-free.
The IDAC range starts lower than ADS1120, which can help high-resistance sensors or applications where sensor self-heating must be minimized. PWR is the 2500-piece TSSOP reel.
For related devices, see HKEQGOO’s ADCs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ADS1220IPWR |
| Resolution / Rate | 24-bit delta-sigma; up to 2 kSPS |
| Effective Resolution | Up to 20 effective bits stated by TI |
| Inputs | 4 single-ended or 2 differential |
| PGA | Gain 1 to 128 |
| Excitation | Two matched current sources, 10 µA to 1.5 mA |
| Reference | Internal 2.048 V reference, 5 ppm/°C typical drift |
| Integrated | Oscillator and temperature sensor; SPI interface |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2500-piece large reel; marking ADS1220 |
| Manufacturer Status | Active / Production |
| Part Marking | ADS1220 |
Functional Highlights
24-bit output supports finer low-rate precision work
The practical benefit appears in noise-limited measurements after choosing gain, data rate and reference architecture appropriately.
10 µA minimum excitation broadens resistance-sensor options
Lower sensor current can reduce self-heating while still supporting ratiometric measurement with an appropriate reference resistor.
Design Considerations
- Base accuracy targets on noise/effective resolution at the selected rate and gain, not the 24-bit word length.
- Calculate sensor self-heating and reference-resistor dissipation for each IDAC setting.
- Protect high-impedance inputs from leakage and noisy digital routing.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ADS1220IPWR as Active / Production; TSSOP (PW), 16 pins; 2500-piece large tape and reel; −40°C to +125°C; marking ADS1220.
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.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
