Specifications
| Type | Description |
|---|---|
| Part Number | ADS1120 |
| Manufacturer | Texas Instruments |
| Product Type | ADC |
| Category | Signal Chain |
| Package / Case | RVA (VQFN-16) 3.5 mm x 3.5 mm; PW (TSSOP-16) 5 mm x 6.4 mm |
| Resolution | 16 bit |
| Input Channels | 2 differential or 4 single-ended inputs |
| Maximum Data Rate | 2000 SPS |
| Noise-Free Resolution | 16 bit at 20 SPS |
| Digital Filter Rejection | Simultaneous 50 Hz and 60 Hz rejection at 20 SPS |
| Programmable Gain | 1 to 128 |
| Excitation Current Sources | 2 sources, 50 uA to 1.5 mA |
| Internal Reference Voltage | 2.048 V |
| Interface | SPI-compatible, mode 1 |
| Current Consumption | 120 uA typ in duty-cycle mode, PGA disabled |
| Operating Temperature Range | -40 degC to +125 degC |
| Supply Voltage (Analog) | 2.3 V to 5.5 V |
| Supply Voltage (Digital) | 2.3 V to 5.5 V |
| HBM ESD Rating | +/-2000 V |
| CDM ESD Rating | +/-500 V |
| Datasheet Status | request_only |
Product Overview
ADS1120 is a Texas Instruments 16-bit precision ADC with a flexible input multiplexer for 2 differential or 4 single-ended inputs. Programmable data rates extend to 2000 SPS, while operation at 20 SPS supports 16-bit noise-free resolution and simultaneous 50 Hz and 60 Hz rejection through the single-cycle settling digital filter.
The device integrates an internal PGA with gain settings from 1 to 128, dual matched programmable excitation current sources from 50 uA to 1.5 mA, a 2.048 V internal reference with 5 ppm/degC typical drift, an internal oscillator with 2% accuracy, and an internal temperature sensor with 0.5 degC typical accuracy. Communication is through an SPI-compatible mode 1 serial interface.
Package options are RVA (VQFN-16) at 3.5 mm x 3.5 mm and PW (TSSOP-16) at 5 mm x 6.4 mm. The ADS1120 supports unipolar analog supplies from 2.3 V to 5.5 V, digital supply from 2.3 V to 5.5 V, bipolar analog supply operation, internal or external clocking, and operation across -40 degC to +125 degC.
Key Features
- 16-bit precision ADC resolution
- 2 differential or 4 single-ended inputs
- Programmable data rates up to 2000 SPS
- 16-bit noise-free resolution at 20 SPS
- Simultaneous 50 Hz and 60 Hz rejection
- Internal PGA gain programmable from 1 to 128
- Two matched excitation current sources, 50 uA to 1.5 mA
- 2.048 V internal reference with 5 ppm/degC typical drift
- SPI-compatible mode 1 serial interface
- Internal and external clock options supported
Typical Applications
- Differential sensor signal digitization
- Single-ended analog input acquisition
- Current-excited sensor interfaces
- Temperature measurement using internal sensor
- SPI-connected data acquisition
- Low-current duty-cycle measurement systems
- Bipolar-supply signal measurement
Procurement Notes
When requesting a quote for ADS1120, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What resolution does the ADS1120 provide?
The ADS1120 provides 16-bit ADC resolution. At 20 SPS it achieves 16-bit noise-free resolution with simultaneous 50 Hz and 60 Hz rejection through the single-cycle settling digital filter.
How many inputs are available on the ADS1120?
The ADS1120 uses a flexible input multiplexer that supports 2 differential inputs or 4 single-ended inputs.
What supply ranges are specified for ADS1120 operation?
For unipolar analog operation, the supply range is 2.3 V to 5.5 V. The digital supply range is also 2.3 V to 5.5 V. Bipolar analog supply operation is supported.
Which interface does the ADS1120 use?
The ADS1120 uses an SPI-compatible mode 1 serial digital interface for communication.
What package options are available for the ADS1120?
Package options are RVA (VQFN-16) measuring 3.5 mm x 3.5 mm and PW (TSSOP-16) measuring 5 mm x 6.4 mm.
Is the ADS1120 suitable for temperature sensing applications?
Yes, the ADS1120 includes an internal temperature sensor with 0.5 degC typical accuracy, making it suitable for temperature measurement and compensation applications.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.