component
MCP4921 12-Bit SPI DAC
Public Made by Adomby adom
Single-channel 12-bit voltage-output DAC with SPI and an external reference input.
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page.json+120−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "mcp4921",+ "title": "MCP4921 12-Bit SPI DAC",+ "brief": "Single-channel 12-bit voltage-output DAC with SPI and an external reference input.", "version": "0.1.0",- "type": "component",- "description": "Single-channel 12-bit voltage-output DAC with SPI and an external reference input.",+ "license": "CC-BY-SA-4.0", "tags": [ "dac", "12-bit",@@ -12,6 +15,120 @@ "microchip", "soic-8" ],+ "component": {+ "mpn": "MCP4921",+ "manufacturer": "Microchip",+ "package": "SOIC-8",+ "pin_count": 8,+ "category": "Analog",+ "subcategory": "Digital-to-Analog Converter",+ "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/22250A.pdf",+ "parts": {+ "symbol": "mcp4921.kicad_sym",+ "footprint": "mcp4921.kicad_mod",+ "model_3d": "mcp4921.glb"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "VDD",+ "type": "power_in",+ "description": "Positive supply voltage input, 2.7V to 5.5V (absolute max 6.5V). Bypass with 0.1 \u00b5F to VSS."+ },+ {+ "number": "2",+ "name": "CS",+ "type": "input",+ "description": "SPI chip-select (active low). Enables the serial interface; input register writes latch on rising edge."+ },+ {+ "number": "3",+ "name": "SCK",+ "type": "input",+ "description": "SPI serial clock input, up to 20 MHz. Data on SDI is sampled on the rising edge."+ },+ {+ "number": "4",+ "name": "SDI",+ "type": "input",+ "description": "SPI serial data input. 16-bit command word (config bits + DAC data) shifted in MSB-first."+ },+ {+ "number": "5",+ "name": "LDAC",+ "type": "input",+ "description": "Synchronous DAC latch (active low). Falling edge transfers both DAC input registers to the DAC output registers, updating VOUTA and VOUTB simultaneously. Tie low for asynchronous updates."+ },+ {+ "number": "6",+ "name": "VREF",+ "type": "input",+ "description": "External voltage reference input for DAC A. Unbuffered range 0 to VDD; buffered range 0.040 V to VDD\u22120.040 V. Input impedance ~165 k\u03a9 (unbuffered)."+ },+ {+ "number": "7",+ "name": "VSS",+ "type": "power_in",+ "description": "Ground return / negative supply. Connect to system analog ground."+ },+ {+ "number": "8",+ "name": "VOUT",+ "type": "output",+ "description": "DAC channel A buffered analog output. Rail-to-rail, output swing 0.01 V to VDD\u22120.04 V, short-circuit current ~15 mA typ, slew rate 0.55 V/\u00b5s."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/22250A.pdf",+ "pages": 48,+ "sha256": "8c507a2bce321888",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Resolution": "12-bit, 1 channel",+ "Output": "Voltage output (buffered, rail-to-rail)",+ "Reference": "External (VREF pin), 1x or 2x gain",+ "Interface": "SPI (up to 20 MHz)",+ "Settling time": "4.5 us typ",+ "Supply voltage": "2.7 V to 5.5 V",+ "Operating temperature": "-40 C to 125 C"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "single DAC",+ "SPI DAC",+ "12-bit voltage output",+ "set-point generator"+ ],+ "discovery_pitch": "One 12-bit analog output over SPI with an external reference and selectable gain, the single-channel MCP4922.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -27,10 +144,5 @@ "docs/mcp4921-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }