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AD7998BRUZ-1
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Analog Devices Analog To Digital Converters (ADCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+56@@ -0,0 +1,56 @@+# AD7998BRUZ-1++**Analog Devices** · Analog To Digital Converters (ADCs) · TSSOP-20++AD7998BRUZ-1 from Analog Devices, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | AGND | power_in | Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage. |+| 2 | VDD | power_in | Power supply input with specified voltage range of 2.7 V to 5.5 V. |+| 3 | AGND | power_in | Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage. |+| 4 | AGND | power_in | Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage. |+| 5 | VDD | power_in | Power supply input with specified voltage range of 2.7 V to 5.5 V. |+| 6 | REFIN | input | External voltage reference input with range 1.2 V to VDD, requiring 0.1 µF and 1 µF decoupling capacitors to AGND. |+| 7 | VIN1 | input | Single-ended analog input channel 1 with input range of 0 V to REFIN. |+| 8 | VIN3 | input | Single-ended analog input channel 3 with input range of 0 V to REFIN. |+| 9 | VIN5 | input | Single-ended analog input channel 5 with input range of 0 V to REFIN. |+| 10 | VIN7 | input | Single-ended analog input channel 7 with input range of 0 V to REFIN. |+| 11 | VIN8 | input | Single-ended analog input channel 8 with input range of 0 V to REFIN. |+| 12 | VIN6 | input | Single-ended analog input channel 6 with input range of 0 V to REFIN. |+| 13 | VIN4 | input | Single-ended analog input channel 4 with input range of 0 V to REFIN. |+| 14 | VIN2 | input | Single-ended analog input channel 2 with input range of 0 V to REFIN. |+| 15 | AS | input | Address select logic input for configuring one of three I2C addresses by connection to AGND, VDD, or floating. |+| 16 | CONVST | input | Edge-triggered conversion start logic input; rising edge powers up device with minimum 1 µs pulse width, falling edge initiates conversion. |+| 17 | ALERT/BUSY | output | Open-drain digital output selectable as ALERT output for limit violation indication or BUSY output for conversion status monitoring. |+| 18 | SDA | bidirectional | Serial bus bidirectional data line with open-drain output capability requiring external pull-up resistor. |+| 19 | SCL | input | Serial bus clock input with open-drain capability requiring external pull-up resistor. |+| 20 | AGND | power_in | Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Analog Devices |+| Package | TSSOP-20 |+| Category | ADC/DAC/Data Conversion |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `AD7998BRUZ-1`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)+- 3D model files: `ad7998bruz-1-etched.step` / `ad7998bruz-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad7998bruz-1.step` / `ad7998bruz-1.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884846018514944) (32 pp, sha256 `081ef00889049a99`, retrieved 2026-09-18, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ad7998bruz-1-datasheet.pdf)
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all analog input signals must be referred to this AGND voltage."+ },+ {+ "number": "2",+ "name": "VDD",+ "type": "power_in",+ "description": "Power supply input with specified voltage range of 2.7 V to 5.5 V."+ },+ {+ "number": "3",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage."+ },+ {+ "number": "4",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage."+ },+ {+ "number": "5",+ "name": "VDD",+ "type": "power_in",+ "description": "Power supply input with specified voltage range of 2.7 V to 5.5 V."+ },+ {+ "number": "6",+ "name": "REFIN",+ "type": "input",+ "description": "External voltage reference input with range 1.2 V to VDD, requiring 0.1 µF and 1 µF decoupling capacitors to AGND."+ },+ {+ "number": "7",+ "name": "VIN1",+ "type": "input",+ "description": "Single-ended analog input channel 1 with input range of 0 V to REFIN."+ },+ {+ "number": "8",+ "name": "VIN3",+ "type": "input",+ "description": "Single-ended analog input channel 3 with input range of 0 V to REFIN."+ },+ {+ "number": "9",+ "name": "VIN5",+ "type": "input",+ "description": "Single-ended analog input channel 5 with input range of 0 V to REFIN."+ },+ {+ "number": "10",+ "name": "VIN7",+ "type": "input",+ "description": "Single-ended analog input channel 7 with input range of 0 V to REFIN."+ },+ {+ "number": "11",+ "name": "VIN8",+ "type": "input",+ "description": "Single-ended analog input channel 8 with input range of 0 V to REFIN."+ },+ {+ "number": "12",+ "name": "VIN6",+ "type": "input",+ "description": "Single-ended analog input channel 6 with input range of 0 V to REFIN."+ },+ {+ "number": "13",+ "name": "VIN4",+ "type": "input",+ "description": "Single-ended analog input channel 4 with input range of 0 V to REFIN."+ },+ {+ "number": "14",+ "name": "VIN2",+ "type": "input",+ "description": "Single-ended analog input channel 2 with input range of 0 V to REFIN."+ },+ {+ "number": "15",+ "name": "AS",+ "type": "input",+ "description": "Address select logic input for configuring one of three I2C addresses by connection to AGND, VDD, or floating."+ },+ {+ "number": "16",+ "name": "CONVST",+ "type": "input",+ "description": "Edge-triggered conversion start logic input; rising edge powers up device with minimum 1 µs pulse width, falling edge initiates conversion."+ },+ {+ "number": "17",+ "name": "ALERT/BUSY",+ "type": "output",+ "description": "Open-drain digital output selectable as ALERT output for limit violation indication or BUSY output for conversion status monitoring."+ },+ {+ "number": "18",+ "name": "SDA",+ "type": "bidirectional",+ "description": "Serial bus bidirectional data line with open-drain output capability requiring external pull-up resistor."+ },+ {+ "number": "19",+ "name": "SCL",+ "type": "input",+ "description": "Serial bus clock input with open-drain capability requiring external pull-up resistor."+ },+ {+ "number": "20",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 32,+ "cost_usd": 0.3813,+ "at": "2026-09-18T00:03:20"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884846018514944",+ "pages": 32,+ "sha256": "081ef00889049a99",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}