company blog about Supply ADS1220IRVAR | TI 24-bit Low-Power Δ-Σ ADC | Suitable for Precision Measurements of RTDs, Thermocouples, and Bridge Sensors

Mingjiada Electronics Supplies the ADS1220: A High-Performance 24-Bit ADC Designed for Precision Sensor Measurement and Industrial Process Control

ADS1220 Product Overview

The ADS1220 is a precision 24-bit analog-to-digital converter (ADC) whose extensive integrated features reduce system cost and component count in applications that measure small sensor signals. The device provides two differential or four single-ended inputs via a flexible input multiplexer (MUX) and integrates a low-noise programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can convert at data rates up to 2,000 samples per second (SPS) and features single-cycle stability. At 20 SPS, the digital filter simultaneously suppresses 50 Hz and 60 Hz interference, meeting the requirements of noisy industrial applications. The internal PGA provides up to 128 times gain. This PGA makes the ADS1220 ideally suited for applications involving the measurement of small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors. When the PGA is enabled, the device supports pseudo-differential or fully differential signal measurements. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and up to 4 gain, thereby supporting single-ended measurements.

When the PGA is disabled and the device operates in duty-cycle mode, power consumption is as low as 120 µA. The ADS1220 is available in leadless VQFN-16 or TSSOP-16 packages and is rated for an operating temperature range of –40°C to +125°C.

ADS1220 Features

• Low current consumption:

– As low as 120 μA (typical) in duty cycle mode

• Wide supply voltage range: 2.3 V to 5.5 V

• Programmable gain: 1 to 128

• Programmable data rate: up to 2 kSPS

• Effective resolution up to 20 bits

• Synchronous suppression of 50 Hz and 60 Hz at 20 SPS using a single-cycle settling digital filter

• Two differential or two single-ended inputs

• Dual-matched programmable current sources:

– 10 μA to 1.5 mA

• Internal 2.048 V reference: 5 ppm/°C (typical) drift

• Internal 2% high-precision oscillator

• Internal temperature sensor:

– 0.5°C (typical) accuracy

• SPI-compatible interface (Mode 1)

ADS1220 Applications

• Field transmitters:

– Temperature, pressure, strain, flow

• PLC and DCS analog input modules

• Patient monitoring systems:

– Body temperature, blood pressure

• Factory automation and process control

ADS1220 Technical Specifications at a Glance

Resolution: 24 bits

Maximum data rate: 2 kSPS

Input Channels: 2 differential / 4 single-ended

PGA Gain: 1 to 128

Supply Voltage: 2.3 V to 5.5 V

Power Consumption: As low as 120 µA (duty cycle mode)

Interface: SPI-compatible

Operating Temperature: -40°C to +125°C

Package: VQFN-16 (3.5 mm × 3.5 mm)

Mingjiada Electronics—Your Trusted Component Supplier

Headquartered in Shenzhen, Mingjiada Electronics has long supplied high-performance components such as the ADS1220. We guarantee brand-new, genuine products and offer fast delivery. Whether you are engaged in product R&D, mass production procurement, or selecting replacement parts, Mingjiada Electronics is committed to providing you with excellent service.