component
ADS1220IRVAR
Public Made by Adomby adom
Texas Instruments Analog To Digital Converters (ADC), VQFN-16-EP(3.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
master
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"title": "ADS1220IRVAR",
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"lcsc": "C2651338",
"digikey": "296-48475-2-ND",
"mouser": "595-ADS1220IRVAR"
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"pins": [
{
"number": "1",
"name": "CLK",
"type": "input",
"description": "External clock source input; tie to DGND when unused so the internal oscillator is active, and an external clock must be 0.5 MHz to 4.5 MHz with 40% to 60% duty cycle."
},
{
"number": "2",
"name": "DGND",
"type": "power_in",
"description": "Digital ground; DVDD to DGND is rated -0.3 V to 7 V absolute maximum and AVSS to DGND must stay between -2.8 V and 0.3 V."
},
{
"number": "3",
"name": "AVSS",
"type": "power_in",
"description": "Negative analog supply; it is 0 V (-0.1 V to 0.1 V) for unipolar operation or -2.75 V to -2.3 V for bipolar operation relative to DGND."
},
{
"number": "4",
"name": "AIN3/REFN1",
"type": "input",
"description": "Analog input 3 and negative reference input 1; it is also tied to AVSS through the internal low-side power switch, so leave it floating when unused."
},
{
"number": "5",
"name": "AIN2",
"type": "input",
"description": "Analog input 2; input voltage must stay between AVSS - 0.3 V and AVDD + 0.3 V to avoid forward-biasing the ESD diodes."
},
{
"number": "6",
"name": "REFN0",
"type": "input",
"description": "Negative reference input 0; it must stay between AVSS - 0.1 V and REFP0 - 0.75 V."
},
{
"number": "7",
"name": "REFP0",
"type": "input",
"description": "Positive reference input 0; it must stay between REFN0 + 0.75 V and AVDD + 0.1 V, with differential reference 0.75 V to AVDD - AVSS."
},
{
"number": "8",
"name": "AIN1",
"type": "input",
"description": "Analog input 1; input voltage must stay between AVSS - 0.3 V and AVDD + 0.3 V to avoid forward-biasing the ESD diodes."
},
{
"number": "9",
"name": "AIN0/REFP1",
"type": "input",
"description": "Analog input 0 and positive reference input 1; input voltage must stay between AVSS - 0.3 V and AVDD + 0.3 V."
},
{
"number": "10",
"name": "AVDD",
"type": "power_in",
"description": "Positive analog supply; AVDD to AVSS is rated 7 V absolute maximum and recommended 2.3 V to 5.5 V, with a 100 nF (or larger) capacitor to AVSS."
},
{
"number": "11",
"name": "DVDD",
"type": "power_in",
"description": "Positive digital supply; DVDD to DGND is recommended 2.3 V to 5.5 V, with a 100 nF (or larger) capacitor to DGND."
},
{
"number": "12",
"name": "DRDY",
"type": "output",
"description": "Data-ready output, active low, indicating a new conversion result is available; if unused, leave it unconnected or pull it up to DVDD through a weak pull-up resistor."
},
{
"number": "13",
"name": "DOUT/DRDY",
"type": "output",
"description": "Serial data output combined with data-ready signal, active low; it goes high impedance when CS is high and can be configured via DRDYM to indicate data ready."
},
{
"number": "14",
"name": "DIN",
"type": "input",
"description": "Serial data input latched on the falling edge of SCLK for commands and register data; the device never drives this pin."
},
{
"number": "15",
"name": "SCLK",
"type": "input",
"description": "Serial clock input with Schmitt-trigger; it must be kept low when the serial interface is idle and kept clean to avoid spurious data shifts."
},
{
"number": "16",
"name": "CS",
"type": "input",
"description": "Chip select, active low; when CS is taken high the serial interface resets and DOUT/DRDY goes high impedance, and CS may be tied to DGND if the bus is not shared."
},
{
"number": "17",
"name": "Thermal Pad",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
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"extractor flagged: The exposed thermal pad (PowerPAD) of the RVA package is not a numbered pin and is therefore not lis; The datasheet gives pin numbers for both RVA (VQFN) and PW (TSSOP) packages in Table 5-1; only the R; The source text is a Chinese translation of TI datasheet SBAS501; pin descriptions were condensed in",
"exposed pad 17 added from the footprint"
],
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"cost_usd": 0.3535,
"at": "2026-10-08T18:48:19"
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"url": "https://www.ti.com/cn/lit/gpn/ads1220",
"pages": 80,
"sha256": "b6715c9f35b93db7",
"source_tier": "lcsc"
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"cad": "KiCad official (CC-BY-SA 4.0)",
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"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "VQFN-16-EP(3.5x3.5)",
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"Pins": "17"
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