component
ADS7842EB
Public Made by Adomby adom
Texas Instruments Analog To Digital Converters (ADC), SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"type": "input",
"description": "Single-ended analog input channel 0 of the 4-channel multiplexer, with a full-scale input span of 0 to VREF."
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{
"number": "2",
"name": "AIN1",
"type": "input",
"description": "Single-ended analog input channel 1 of the 4-channel multiplexer, with a full-scale input span of 0 to VREF."
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{
"number": "3",
"name": "AIN2",
"type": "input",
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"number": "4",
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{
"number": "5",
"name": "VREF",
"type": "power_in",
"description": "Voltage reference input that sets the analog input range; the Electrical Characteristics specify the reference range as 0.1 V to +VCC."
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{
"number": "6",
"name": "AGND",
"type": "power_in",
"description": "Analog ground; the datasheet recommends connecting it to a clean ground point, separate from microcontroller or DSP grounds."
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{
"number": "7",
"name": "DB11",
"type": "tri_state",
"description": "Parallel 3-state data output bit 11, the MSB, valid after the rising edge of BUSY."
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{
"number": "8",
"name": "DB10",
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"description": "Parallel 3-state data output bit 10, valid after the rising edge of BUSY."
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{
"number": "9",
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"type": "tri_state",
"description": "Parallel 3-state data output bit 9, valid after the rising edge of BUSY."
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{
"number": "10",
"name": "DB8",
"type": "tri_state",
"description": "Parallel 3-state data output bit 8, valid after the rising edge of BUSY."
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{
"number": "11",
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"type": "tri_state",
"description": "Parallel 3-state data output bit 7, valid after the rising edge of BUSY."
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{
"number": "12",
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"type": "tri_state",
"description": "Parallel 3-state data output bit 6, valid after the rising edge of BUSY."
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{
"number": "13",
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"description": "Parallel 3-state data output bit 5, valid after the rising edge of BUSY."
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{
"number": "14",
"name": "DGND",
"type": "power_in",
"description": "Digital ground for the parallel interface and digital circuitry."
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{
"number": "15",
"name": "DB4",
"type": "tri_state",
"description": "Parallel 3-state data output bit 4, valid after the rising edge of BUSY."
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{
"number": "16",
"name": "DB3",
"type": "tri_state",
"description": "Parallel 3-state data output bit 3, valid after the rising edge of BUSY."
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{
"number": "17",
"name": "DB2",
"type": "tri_state",
"description": "Parallel 3-state data output bit 2, valid after the rising edge of BUSY."
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{
"number": "18",
"name": "DB1",
"type": "tri_state",
"description": "Parallel 3-state data output bit 1, valid after the rising edge of BUSY."
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{
"number": "19",
"name": "DB0",
"type": "tri_state",
"description": "Parallel 3-state data output bit 0, the LSB, valid after the rising edge of BUSY."
},
{
"number": "20",
"name": "RD",
"type": "input",
"description": "Active-LOW read input that reads the data outputs in combination with CS; with A0 it also controls power-down and wake-up."
},
{
"number": "21",
"name": "CS",
"type": "input",
"description": "Active-LOW chip select; CS and WR both LOW initiate a new conversion and place the outputs in tri-state mode."
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{
"number": "22",
"name": "WR",
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"description": "Active-LOW write input that starts a new conversion on its falling edge and selects the analog channel via A0 and A1 in combination with CS."
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{
"number": "23",
"name": "BUSY",
"type": "output",
"description": "Goes LOW during a conversion and rises when the conversion completes, which also enables the parallel outputs."
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{
"number": "24",
"name": "CLK",
"type": "input",
"description": "External clock input whose frequency sets the conversion rate through fCLK = 16 × fSAMPLE."
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{
"number": "25",
"name": "A0",
"type": "input",
"description": "Address input that selects one of four analog channels with A1 and CS/WR, latched on the rising edge of RD or WR; with RD it controls power-down and wake-up."
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{
"number": "26",
"name": "A1",
"type": "input",
"description": "Address input that selects one of four analog channels with A0 (00 = AIN0 to 11 = AIN3), latched on the rising edge of RD or WR."
},
{
"number": "27",
"name": "VDIG",
"type": "power_in",
"description": "Digital supply input, nominally +5 V."
},
{
"number": "28",
"name": "VANA",
"type": "power_in",
"description": "Analog supply input, nominally +5 V."
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