ADS1220 24-bit Analog-to-Digital Converter

Specifications

Product Overview

The ADS1220 is a Texas Instruments 24-bit analog-to-digital converter offering a flexible input multiplexer that supports 2 differential or 4 single-ended inputs, with programmable data rates up to 2000 SPS and up to 20 bits of effective resolution. The internal PGA supports gain settings from 1 to 128, while bypass mode maintains high input impedance for gains up to 4.

Integrated signal-chain functions include a 2.048 V internal reference with 5 ppm/degC typical drift, two matched programmable current sources from 10 uA to 1.5 mA, an internal oscillator with 2% accuracy, and an internal temperature sensor with 0.5 degC typical accuracy. At 20 SPS, the single-cycle settling digital filter provides simultaneous 50 Hz and 60 Hz rejection.

The device supports a 2.3 V to 5.5 V supply range, SPI-compatible mode 1 communication, active-low chip select, and active-low data-ready signaling. Package options include RVA VQFN-16 at 3.5 mm x 3.5 mm and PW TSSOP-16 at 5.0 mm x 6.4 mm.

Key Features

• 24-bit ADC resolution with up to 20 effective bits
• 2 differential or 4 single-ended input channels
• Programmable data rates up to 2000 SPS
• Internal PGA supports gain from 1 to 128
• PGA bypass supports high impedance up to gain 4
• 2.3 V to 5.5 V supply voltage range
• Two matched excitation sources from 10 uA to 1.5 mA
• 2.048 V internal reference with 5 ppm/degC drift
• SPI-compatible mode 1 serial interface
• Simultaneous 50 Hz and 60 Hz rejection at 20 SPS
• Internal or external clock source support
• Active-low chip select and data-ready signaling

Typical Applications

• Differential signal digitization
• Single-ended analog input measurement
• Sensor excitation current drive
• Temperature sensing using internal sensor
• SPI-connected data acquisition
• Bipolar supply signal measurement
• 50 Hz and 60 Hz rejection systems
• Low-current duty-cycle measurements

Procurement Notes

When requesting a quote for ADS1220, 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.