ADS1220IRVAT.A

Part: ADS1220, Texas Instruments

Type: 24-Bit Analog-to-Digital Converter (ADC)

Description: The ADS1220 is a precision, 24-bit, 4-channel analog-to-digital converter with integrated PGA and reference, offering a wide supply range of 2.3 V to 5.5 V, programmable data rates up to 2 kSPS, and low current consumption as low as 120 μA (typ) in duty-cycle mode.

Operating Conditions:

• Supply voltage: 2.3 V to 5.5 V
• Operating temperature: -40°C to +125°C
• Max data rate: Up to 2 kSPS
• PGA gain range: 1 V/V to 128 V/V

Absolute Maximum Ratings:

• Max supply voltage: 6.0 V
• Max junction/storage temperature: +150°C

Key Specs:

• Resolution: 24-Bit
• Programmable Data Rates: Up to 2 kSPS
• Programmable Gain: 1 V/V to 128 V/V
• Low Current Consumption: As low as 120 μA (typ) in Duty-Cycle Mode
• Internal Reference: 2.048-V, 5 ppm/°C (typ) Drift
• Internal Temperature Sensor Accuracy: 0.5°C (typ)
• Input Channels: Two Differential or Four Single-Ended
• Programmable Current Sources: 10 μA to 1.5 mA

Features:

• Low Current Consumption: As Low as 120 μA (typ) in Duty-Cycle Mode
• Wide Supply Range: 2.3 V to 5.5 V
• Programmable Gain: 1 V/V to 128 V/V
• Programmable Data Rates: Up to 2 kSPS
• Up to 20-Bits Effective Resolution
• Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter
• Two Differential or Four Single-Ended Inputs
• Dual Matched Programmable Current Sources: 10 μA to 1.5 mA
• Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
• Internal 2% Accurate Oscillator
• Internal Temperature Sensor: 0.5°C (typ) Accuracy
• SPI-Compatible Interface (Mode 1)

Applications:

• Temperature Sensor Measurements:
• • Thermistors
• • Thermocouples
• • Resistance Temperature Detectors (RTDs): 2-, 3-, or 4-Wire Types
• Resistive Bridge Sensor Measurements:
• • Pressure Sensors
• • Strain Gauges
• • Weigh Scales
• Portable Instrumentation
• Factory Automation and Process Control

Package:

• VQFN (16) 3.50 mm × 3.50 mm
• TSSOP (16) 5.00 mm × 4.40 mm

• 1 · Low Current Consumption: As Low as 120 μ A (typ) in Duty-Cycle Mode
• Wide Supply Range: 2.3 V to 5.5 V
• Programmable Gain: 1 V/V to 128 V/V
• Programmable Data Rates: Up to 2 kSPS
• Up to 20-Bits Effective Resolution
• Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter
• Two Differential or Four Single-Ended Inputs
• Dual Matched Programmable Current Sources: 10 μ A to 1.5 mA
• Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
• Internal 2% Accurate Oscillator
• Internal Temperature Sensor: 0.5°C (typ) Accuracy
• SPI-Compatible Interface (Mode 1)
• Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN

• Temperature Sensor Measurements:
• -Thermistors
• -Thermocouples
• -Resistance Temperature Detectors (RTDs): 2-, 3-, or 4-Wire Types
• Resistive Bridge Sensor Measurements:
• -Pressure Sensors
• -Strain Gauges
• -Weigh Scales
• Portable Instrumentation
• Factory Automation and Process Control

Minimum and maximum specifications apply from TA = -40°C to +125°C. Typical specifications are at TA = 25°C. All specifications are at AVDD = 3.3 V, AVSS = 0 V, DVDD = 3.3 V, PGA enabled, DR = 20 SPS, and external Vref = 2.5 V (unless otherwise noted). (1)

over operating ambient temperature range (unless otherwise noted)

The ADS1220 is a precision, 24-bit, ΔΣ ADC that offers many integrated features to ease the measurement of the most common sensor types including various types of temperature and bridge sensors. Primary considerations when designing an application with the ADS1220 include analog input filtering, establishing an appropriate external reference for ratiometric measurements, and setting the common-mode input voltage for the internal PGA. Connecting and configuring the serial interface appropriately is another concern. These considerations are discussed in the following sections.