ADS1220IRVAR
The ADS1220IRVAR is an electronic component from Texas Instruments. View the full ADS1220IRVAR datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
ADS1220IRVAR shares its datasheet with ADS1220, whose page lists every part number it covers.
Official ADS1220IRVAR datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsADS1220IRVAR Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits, no missing codes |
| Data rates | 20–1000 SPS normal, 5–250 SPS duty-cycle, 40–2000 SPS turbo |
| INL | ±6 ppm FSR typ (gain 1–128, VCM = 0.5 AVDD); ±4 ppm FSR typ (PGA disabled, gain 1–4, differential inputs); 15 ppm FSR max |
| Conditions | AVDD = DVDD = 3.3 V, PGA enabled, DR = 20 SPS, VREF = 2.5 V external |
| Current consumption | as low as 120 μA typ in duty-cycle mode with PGA disabled |
| Internal reference | 2.048 V, 5 ppm/°C typ drift |
| Internal oscillator | 2% accuracy |
| Excitation current sources | dual matched, 10 μA to 1.5 mA |
| Temperature sensor accuracy | 0.5 °C typ |
| Thermal resistance RθJA | 43.4 °C/W (VQFN), 99.5 °C/W (TSSOP) |
ADS1220IRVAR Overview
Part: ADS1220 — Texas Instruments
Type: 24-Bit Delta-Sigma ADC with Integrated PGA and Reference
Description: 4-channel (two differential or four single-ended), 24-bit, up to 2 kSPS SPI ADC with PGA (gain 1–128), 2.048 V internal reference, dual excitation current sources and temperature sensor, operating from 2.3–5.5 V.
Operating Conditions:
- Supply voltage: AVDD to AVSS 2.3–5.5 V (unipolar); DVDD 2.3–5.5 V; bipolar supply ±2.3 to ±2.75 V
- Operating temperature: -40 to +125 °C
- External clock: 0.5–4.5 MHz (4.096 MHz nominal)
- Differential reference input: 0.75 V to AVDD − AVSS
Absolute Maximum Ratings:
- Max supply voltage: AVDD to AVSS and DVDD to DGND: 7 V (min -0.3 V)
- Analog input voltage: AVSS − 0.3 V to AVDD + 0.3 V
- Continuous input current (any pin except supply): ±10 mA
- Max junction temperature: 150 °C
- Storage temperature: -60 to 150 °C
Key Specs:
- Resolution: 24 bits, no missing codes
- Data rates: 20–1000 SPS normal, 5–250 SPS duty-cycle, 40–2000 SPS turbo
- INL: ±6 ppm FSR typ (gain 1–128, VCM = 0.5 AVDD); ±4 ppm FSR typ (PGA disabled, gain 1–4, differential inputs); 15 ppm FSR max
- Conditions: AVDD = DVDD = 3.3 V, PGA enabled, DR = 20 SPS, VREF = 2.5 V external
- Current consumption: as low as 120 μA typ in duty-cycle mode with PGA disabled
- Internal reference: 2.048 V, 5 ppm/°C typ drift
- Internal oscillator: 2% accuracy
- Excitation current sources: dual matched, 10 μA to 1.5 mA
- Temperature sensor accuracy: 0.5 °C typ
- Thermal resistance RθJA: 43.4 °C/W (VQFN), 99.5 °C/W (TSSOP)
Features:
- Programmable gain 1 to 128 with low-noise PGA
- Up to 20 bits effective resolution
- Simultaneous 50 Hz and 60 Hz rejection at 20 SPS with single-cycle settling filter
- Two differential or four single-ended inputs via flexible MUX
- Dual-matched programmable current sources
- Internal 2.048 V reference and internal oscillator
- Internal temperature sensor
- Low-side power switch
- SPI-compatible interface (mode 1)
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
Package:
- RVA VQFN-16, 3.5 mm × 3.5 mm
- PW TSSOP-16, 5.0 mm × 6.4 mm
ADS1220IRVAR Features
- Low current consumption:
- -As low as 120μA (typ) in duty-cycle mode
- Wide supply range: 2.3V to 5.5V
- Programmable gain: 1 to 128
- Programmable data rates: Up to 2kSPS
- Up to 20 Bits effective resolution
- Simultaneous 50Hz and 60Hz rejection at 20SPS with single-cycle settling digital filter
- Two differential or four single-ended inputs
- Dual-matched programmable current sources: -10μA to 1.5mA
- Internal 2.048V reference: 5ppm/°C (typ) drift
- Internal 2% accurate oscillator
- Internal temperature sensor:
- -0.5°C (typ) accuracy
- SPI-compatible interface (mode 1)
ADS1220IRVAR 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
ADS1220IRVAR Pin Configuration
Figure 5-1. RVA Package, 16-Pin VQFN
Figure 5-2. PW Package, 16-Pin TSSOP
Table 5-1. Pin Functions
| PIN - NAME | PIN - NO. - RVA | PIN - NO. - PW | TYPE | DESCRIPTION (1) |
|---|---|---|---|---|
| AIN0/REFP1 | 9 | 11 | Analog input | Analog input 0, positive reference input 1 |
| AIN1 | 8 | 10 | Analog input | Analog input 1 |
| AIN2 | 5 | 7 | Analog input | Analog input 2 |
| AIN3/REFN1 | 4 | 6 | Analog input | Analog input 3, negative reference input 1. Internal low-side power switch connected between AIN3/REFN1 and AVSS. |
| AVDD | 10 | 12 | Analog supply | Positive analog power supply. Connect a 100nF (or larger) capacitor to AVSS. |
| AVSS | 3 | 5 | Analog supply | Negative analog power supply |
| CLK | 1 | 3 | Digital input | External clock source pin. Connect to DGND if not used. |
| CS | 16 | 2 | Digital input | Chip select; active low. Connect to DGND if not used. |
| DGND | 2 | 4 | Digital supply | Digital ground |
| DIN | 14 | 16 | Digital input | Serial data input |
| DOUT/ DRDY | 13 | 15 | Digital output | Serial data output combined with data ready; active low |
| DRDY | 12 | 14 | Digital output | Data ready, active low. Leave unconnected or tie to DVDD using a weak pull-up resistor if not used. |
| DVDD | 11 | 13 | Digital supply | Positive digital power supply. Connect a 100nF (or larger) capacitor to DGND. |
| REFN0 | 6 | 8 | Analog input | Negative reference input 0 |
| REFP0 | 7 | 9 | Analog input | Positive reference input 0 |
| SCLK | 15 | 1 | Digital input | Serial clock input |
| Thermal pad | Pad | - | - | Thermal power pad. Do not connect or only connect to AVSS. |
Table 5-1. Pin Functions
ADS1220IRVAR Electrical Characteristics
Minimum and maximum specifications apply from TA = -40°C to +125°C. Typical specifications are at TA = 25°C. All specifications are at AVDD = 3.3V, AVSS = 0V, DVDD = 3.3V, PGA enabled, DR = 20SPS, and external VREF = 2.5V (unless otherwise noted).
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS |
| Absolute input current | See the Typical Characteristics | See the Typical Characteristics | See the Typical Characteristics | |||
| Differential input current | See the Typical Characteristics | See the Typical Characteristics | See the Typical Characteristics | |||
| SYSTEM PERFORMANCE | SYSTEM PERFORMANCE Resolution (no missing codes) | SYSTEM PERFORMANCE | SYSTEM PERFORMANCE 24 | SYSTEM PERFORMANCE | SYSTEM PERFORMANCE | SYSTEM PERFORMANCE Bits |
| Normal mode | 20, 45, 90, 175, 330, 600, 1000 | 20, 45, 90, 175, 330, 600, 1000 | 20, 45, 90, 175, 330, 600, 1000 | |||
| DR | Data rate | Duty-cycle mode | 5, 11.25, 22.5, 44, 82.5, 150, 250 | 5, 11.25, 22.5, 44, 82.5, 150, 250 | 5, 11.25, 22.5, 44, 82.5, 150, 250 | SPS |
| Turbo mode | 40, 90, 180, 350, 660, 1200, 2000 | 40, 90, 180, 350, 660, 1200, 2000 | 40, 90, 180, 350, 660, 1200, 2000 | SPS | ||
| Noise (input-referred) | See the Noise Performance section | See the Noise Performance section | See the Noise Performance section | |||
| INL | Integral nonlinearity | Gain = 1 to 128, V CM = 0.5 AVDD, best fit (1) PGA disabled, gain = 1 to 4, differential inputs | -15 | ±6 ±4 | 15 | ppm FSR |
| V IO | Input offset voltage | Gain = 1, differential inputs, T A = 25°C Gain = 2 to 128, differential inputs PGA disabled, gain = 1 to 4 | -30 | ±4 ±4 0.25 | 30 | μV |
| Offset drift | Gain = 1 to 128, T A = -40°C to +85°C (1) Gain = 1 to 128 | 0.08 0.25 | 0.3 | μV/°C | ||
| Offset match | Match between any two inputs PGA disabled, gain = 1 to 4 | ±20 ±0.015% | μV | |||
| Gain error | Gain = 1 to 128, T A = 25°C PGA disabled, gain = 1 to 4 | -0.1% | ±0.015% 1 | 0.1% | ppm/°C | |
| Gain drift | Gain = 1 to 128 (1) 50Hz ±3%, DR = 20SPS, external CLK, 50/60 bit = 10b | 105 | 1 | 4 | ||
| NMRR | Normal-mode rejection ratio (1) | 60Hz ±3%, DR = 20SPS, external CLK, 50/60 bit = 11b 50Hz or 60Hz ±3%, DR = 20SPS, external CLK, 50/60 bit = 01b At dc, gain = 1 | 105 90 90 | 105 | dB | |
| CMRR | Common-mode rejection ratio | f CM = 50Hz, DR = 2000SPS (1) f CM = 60Hz, DR = 2000SPS (1) | 95 95 | 115 115 | dB | |
| Power-supply rejection ratio | AVDD at dc, V CM = 0.5 AVDD, gain = 1 | 80 | 105 | |||
| PSRR | DVDD at dc, V CM = 0.5 AVDD, gain = 1 (1) | 100 | 115 | dB | ||
| INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE | INTERNAL VOLTAGE REFERENCE |
| Initial accuracy | T A = 25°C | 2.045 | 2.048 | 2.051 | V | |
| Reference drift (1) | 5 | 30 | ppm/°C | |||
| Long-term drift | 1000 hours | 110 | ppm | |||
| VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS |
| Reference input current | REFP0 = V REF , REFN0 = AVSS | ±10 | nA | |||
| INTERNAL OSCILLATOR | INTERNAL OSCILLATOR | INTERNAL OSCILLATOR | INTERNAL OSCILLATOR | INTERNAL OSCILLATOR | INTERNAL OSCILLATOR | INTERNAL OSCILLATOR |
| Internal oscillator accuracy | Normal mode | -2% | ±1% | 2% | ||
| EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) | EXCITATION CURRENT SOURCES (IDACs) |
| Current settings | 10, 50, 100, 250, 500, 1000, 1500 | 10, 50, 100, 250, 500, 1000, 1500 | 10, 50, 100, 250, 500, 1000, 1500 | μA | ||
| Compliance voltage Current match | All current settings Between IDACs (not valid for 10μA setting) | AVDD - | AVDD - ±0.3% | 0.9 | V | |
| Temperature drift | Each IDAC (not valid for 10μA setting) | 50 | ppm/°C | |||
| Temperature drift matching | Between IDACs (not valid for 10μA setting) | 10 | ppm/°C |
Minimum and maximum specifications apply from TA = -40°C to +125°C. Typical specifications are at TA = 25°C. All specifications are at AVDD = 3.3V, AVSS = 0V, DVDD = 3.3V, PGA enabled, DR = 20SPS, and external VREF = 2.5V (unless otherwise noted).
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| TEMPERATURE SENSOR | TEMPERATURE SENSOR Conversion resolution Temperature resolution | TEMPERATURE SENSOR | TEMPERATURE SENSOR | TEMPERATURE SENSOR 14 0.03125 | TEMPERATURE SENSOR | TEMPERATURE SENSOR Bits °C |
| Accuracy | T A = 0°C to +75°C | -0.5 | ±0.25 | 0.5 | °C | |
| Accuracy | T A = -40°C to +125°C | -1 | ±0.5 | 1 | °C | |
| Accuracy vs analog supply voltage | 0.0625 | 0.25 | °C/V | |||
| LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH | LOW-SIDE POWER SWITCH |
| R ON | On-resistance Current through switch | 3.5 | 5.5 30 | Ω mA | ||
| DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS | DIGITAL INPUTS/OUTPUTS |
| V IH | High-level input voltage | 0.7 DVDD | DVDD | V | ||
| V IL | Low-level input voltage | DGND | 0.3 DVDD | V | ||
| V OH | High-level output voltage | I OH = 3mA | 0.8 DVDD | V | ||
| V OL | Low-level output voltage | I OL = 3mA | 0.2 DVDD | V | ||
| I H | Input leakage, high | V IH = 5.5V | -10 | 10 | μA | |
| I L | Input leakage, low | V IL = DGND | -10 | 10 | μA | |
| POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY |
| I AVDD | Power-down mode | 0.1 | 3 | |||
| I AVDD | Duty-cycle mode, PGA disabled | 65 | ||||
| I AVDD | Duty-cycle mode, gain = 1 to 16 | 95 | ||||
| I AVDD | Duty-cycle mode, gain = 32 | 115 | ||||
| I AVDD | Duty-cycle mode, gain = 64, 128 | 135 | ||||
| I AVDD | Normal mode, PGA disabled | 240 | ||||
| I AVDD | Analog supply current (2) | Normal mode, gain = 1 to 16 | 340 | 490 | μA | |
| I AVDD | Normal mode, gain = 32 | 425 | ||||
| I AVDD | Normal mode, gain = 64, 128 | 510 | ||||
| I AVDD | Turbo mode, PGA disabled | 360 | ||||
| I AVDD | Turbo mode, gain = 1 to 16 | 540 | ||||
| I AVDD | Turbo mode, gain = 32 | 715 | ||||
| I DVDD | Digital supply current (2) | Power-down mode | 0.3 | 5 | μA | |
| I DVDD | Digital supply current (2) | Duty-cycle mode | 55 | μA | ||
| I DVDD | Digital supply current (2) | Normal mode Turbo mode Duty-cycle | 75 95 0.4 | 110 | μA mW | |
| P D | Power dissipation (2) | mode, PGA disabled | ||||
| P D | Power dissipation (2) | Normal mode, gain = 1 to 16 | 1.4 | |||
| P D | Power dissipation (2) | Turbo mode, gain = 1 to 16 | 2.1 |
ADS1220IRVAR Absolute Maximum Ratings
over operating ambient temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Power-supply voltage | AVDD to AVSS | -0.3 | 7 | V |
| Power-supply voltage | DVDD to DGND | -0.3 | 7 | V |
| Power-supply voltage | AVSS to DGND | -2.8 | 0.3 | V |
| Analog input voltage | AIN0/REFP1, AIN1, AIN2, AIN3/REFN1, REFP0, REFN0 | AVSS - 0.3 | AVDD + 0.3 | V |
| Digital input voltage | CS, SCLK, DIN, DOUT/ DRDY, DRDY, CLK | DGND - 0.3 | DVDD + 0.3 | V |
| Input current | Continuous, any pin except power supply pins | -10 | 10 | mA |
| Temperature | Junction, T J | -40 | 150 | °C |
| Temperature | Storage, T stg | -60 | 150 | °C |
ADS1220IRVAR Recommended Operating Conditions
over operating ambient temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |||
|---|---|---|---|---|---|---|
| POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY |
| Unipolar analog power supply | AVDD to AVSS | 2.3 | 5.5 | V | ||
| AVSS to DGND | -0.1 | 0 | 0.1 | V | ||
| Bipolar analog power supply | AVDD to DGND | 2.3 | 2.5 | 2.75 | V | |
| AVSS to DGND | -2.75 | -2.5 | -2.3 | V | ||
| Digital power supply | DVDD to DGND | 2.3 | 5.5 | V | ||
| ANALOG INPUTS (1) | ANALOG INPUTS (1) | ANALOG INPUTS (1) | ANALOG INPUTS (1) | ANALOG INPUTS (1) | ANALOG INPUTS (1) | ANALOG INPUTS (1) |
| V IN | Differential input voltage | V IN = V AINP - V AINN (2) | -V REF / Gain | V REF / Gain | V | |
| V AINx | Absolute input voltage | PGA disabled, gain = 1 to 4 | AVSS - 0.1 | AVDD + 0.1 | V | |
| PGA enabled, gain = 1 to 128 | See the Low-Noise PGA section | See the Low-Noise PGA section | See the Low-Noise PGA section | See the Low-Noise PGA section | ||
| V CM | Common-mode input voltage | PGA disabled, gain = 1 to 4 | AVSS - 0.1 | AVDD + 0.1 | V | |
| V CM | PGA enabled, gain = 1 to 128 | See the Low-Noise PGA section | See the Low-Noise PGA section | See the Low-Noise PGA section | ||
| VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) | VOLTAGE REFERENCE INPUTS (3) |
| V REF | Differential reference input voltage | V REF = V REFPx - V REFNx | 0.75 | 2.5 | AVDD - AVSS | V |
| V REFNx | Absolute negative reference voltage | AVSS - 0.1 | V REFPx - 0.75 | V | ||
| V REFPx | Absolute positive reference voltage | V REFNx + 0.75 | AVDD + 0.1 | V | ||
| EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE | EXTERNAL CLOCK SOURCE |
| f CLK | External clock frequency Duty cycle | 0.5 40% | 4.096 | 4.5 60% | MHz | |
| DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS |
| Input voltage | DGND | DVDD | V | |||
| TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE |
| T A | Operating ambient temperature | -40 | 125 | °C |
Limited to ±[(AVDD - AVSS) - 0.4V] / Gain, when the PGA is enabled.
(3) REFPx and REFNx denote one of the two available differential reference input pairs.
ADS1220IRVAR Thermal Information
| THERMAL METRIC (1) | THERMAL METRIC (1) | ADS1220 - VQFN (RVA) 16 PINS | ADS1220 - TSSOP (PW) 16 PINS | UNIT |
|---|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 43.4 | 99.5 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 47.3 | 35.2 | °C/W |
| R θJB | Junction-to-board thermal resistance | 18.4 | 44.3 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 0.6 | 2.4 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 18.4 | 43.8 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | 2.0 | n/a | °C/W |
ADS1220IRVAR Typical Application
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.
ADS1220IRVAR Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| ADS1220 | RVA (VQFN, 16) | 3.5mm × 3.5mm |
| ADS1220 | PW (TSSOP, 16) | 5.0mm × 6.4mm |
- (1) For all available packages, see the orderable addendum at the end of the data sheet.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
K-Type Thermocouple Measurement
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