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DAC8734SRHAR
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Texas Instruments Digital To Analog Converters (DACs), VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+77@@ -0,0 +1,77 @@+# DAC8734SRHAR++**Texas Instruments** · Digital To Analog Converters (DACs) · VQFN-40-EP(6x6)++DAC8734SRHAR from Texas Instruments, in a VQFN-40-EP(6x6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CS | input | SPI chip select input (active low); data not clocked into shift register unless CS is low. |+| 2 | SCLK | input | SPI bus clock; data latched on falling edge of SCLK while CS is low, supports up to 50MHz. |+| 3 | SDI | input | SPI bus input data; 24-bit word loaded MSB first under SCLK control. |+| 4 | SDO | tri_state | SPI data output (tri-state); high-impedance when CS is high, can daisy-chain to next device SDI. |+| 5 | LDAC | input | Load DAC latch control input (active low); transfers Input Data Register to DAC latch and updates outputs. |+| 6 | RST | input | Reset input (active low); resets input registers and DACs to values defined by UNI/BIP pins. |+| 7 | GPIO-0 | bidirectional | General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output. |+| 8 | GPIO-1 | bidirectional | General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output. |+| 9 | UNI/BIP-A | input | Output mode selection for group A (DAC-0, DAC-1); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V). |+| 10 | DGND | power_in | Digital ground; return path for digital circuits. |+| 11 | IOVDD | power_in | Interface logic power supply; 1.8V to DVDD, supports 1.8V/3V/5V logic levels. |+| 12 | DVDD | power_in | Digital power supply; 2.7V to 5.5V, powers digital circuits and SPI interface. |+| 13 | VOUT-0 | output | DAC-0 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution. |+| 14 | RFB2-0 | output | DAC-0 RFB2 feedback resistor pin; connect to VOUT-0 with RFB1-0 for gain=2, leave open for gain=4. |+| 15 | RFB1-0 | output | DAC-0 RFB1 feedback resistor pin; connect to VOUT-0 for gain=2 or gain=4 configurations. |+| 16 | SGND-0 | power_in | DAC-0 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity. |+| 17 | SGND-1 | power_in | DAC-1 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity. |+| 18 | RFB1-1 | output | DAC-1 RFB1 feedback resistor pin; connect to VOUT-1 for gain=2 or gain=4 configurations. |+| 19 | RFB2-1 | output | DAC-1 RFB2 feedback resistor pin; connect to VOUT-1 with RFB1-1 for gain=2, leave open for gain=4. |+| 20 | VOUT-1 | output | DAC-1 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution. |+| 21 | AVDD | power_in | Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages. |+| 22 | AGND | power_in | Analog ground; power ground for DAC, must connect to REFGND-A and REFGND-B. |+| 23 | AVSS | power_in | Negative analog power supply; -18V to -4.75V, provides return path for analog power. |+| 24 | REFGND-A | power_in | Reference ground for REF-A; connect to AGND and SGND-0/SGND-1 with very low impedance traces. |+| 25 | REF-A | input | Reference input for group A (DAC-0, DAC-1); typically +5V, sets output span for group A channels. |+| 26 | REF-B | input | Reference input for group B (DAC-2, DAC-3); typically +5V, sets output span for group B channels. |+| 27 | REFGND-B | power_in | Reference ground for REF-B; connect to AGND and SGND-2/SGND-3 with very low impedance traces. |+| 28 | AVSS | power_in | Negative analog power supply; -18V to -4.75V, provides return path for analog power. |+| 29 | VMON | output | Analog monitor output (high-impedance when disabled); multiplexes one of four DAC outputs or AIN via Monitor Register. |+| 30 | AVDD | power_in | Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages. |+| 31 | VOUT-3 | output | DAC-3 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution. |+| 32 | RFB2-3 | output | DAC-3 RFB2 feedback resistor pin; connect to VOUT-3 with RFB1-3 for gain=2, leave open for gain=4. |+| 33 | RFB1-3 | output | DAC-3 RFB1 feedback resistor pin; connect to VOUT-3 for gain=2 or gain=4 configurations. |+| 34 | SGND-3 | power_in | DAC-3 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity. |+| 35 | SGND-2 | power_in | DAC-2 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity. |+| 36 | RFB1-2 | output | DAC-2 RFB1 feedback resistor pin; connect to VOUT-2 for gain=2 or gain=4 configurations. |+| 37 | RFB2-2 | output | DAC-2 RFB2 feedback resistor pin; connect to VOUT-2 with RFB1-2 for gain=2, leave open for gain=4. |+| 38 | VOUT-2 | output | DAC-2 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution. |+| 39 | AIN | input | Auxiliary analog input; routed to analog monitor multiplexer (VMON), accepts AVSS-0.3V to AVDD+0.3V. |+| 40 | UNI/BIP-B | input | Output mode selection for group B (DAC-2, DAC-3); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V). |+| 41 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-40-EP(6x6) |+| Category | ADC/DAC/Data Conversion |+| Pins | 41 |++## CAD (KiCad official)++- Symbol: `DAC8734SRHAR`+- Footprint: `Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm`+- 3D model: VQFN-40-EP(6x6) (KiCad packages3D, STEP)+- 3D model files: `dac8734srhar-etched.step` / `dac8734srhar-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dac8734srhar.step` / `dac8734srhar.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/dac8734) (51 pp, sha256 `6fd4329aabd41484`, retrieved 2026-10-07, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (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/dac8734srhar-datasheet.pdf)
page.jsonadded+398@@ -0,0 +1,398 @@+{+ "slug": "dac8734srhar",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Digital To Analog Converters (DACs), VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "adc-dac-data conversion",+ "dac8734srhar",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "dac8734srhar.kicad_sym",+ "dac8734srhar.kicad_mod",+ "dac8734srhar.glb",+ "dac8734srhar.step",+ "dac8734srhar.lbr",+ "docs/hero.png",+ "docs/dac8734srhar-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "dac8734srhar-hero.glb",+ "dac8734srhar-hero.overlay.json"+ ],+ "component": {+ "mpn": "DAC8734SRHAR",+ "manufacturer": "Texas Instruments",+ "package": "VQFN-40-EP(6x6)",+ "pin_count": 41,+ "category": "ADC/DAC/Data Conversion",+ "subcategory": "Digital To Analog Converters (DACs)",+ "datasheet": "https://www.ti.com/cn/lit/gpn/dac8734",+ "parts": {+ "symbol": "dac8734srhar.kicad_sym",+ "footprint": "dac8734srhar.kicad_mod",+ "model_3d": "dac8734srhar-hero.glb",+ "model_3d_plain": "dac8734srhar.glb",+ "model_3d_step": "dac8734srhar-etched.step",+ "model_3d_step_plain": "dac8734srhar.step",+ "lbr": "dac8734srhar.lbr"+ },+ "distributor_links": {+ "lcsc": "C2680073",+ "digikey": "DAC8734SRHAR-ND",+ "mouser": "595-DAC8734SRHAR"+ },+ "distributor_check": {+ "checked_at": "2026-10-07T02:19:47Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "DAC8734SRHAR-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-DAC8734SRHAR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "CS",+ "type": "input",+ "description": "SPI chip select input (active low); data not clocked into shift register unless CS is low."+ },+ {+ "number": "2",+ "name": "SCLK",+ "type": "input",+ "description": "SPI bus clock; data latched on falling edge of SCLK while CS is low, supports up to 50MHz."+ },+ {+ "number": "3",+ "name": "SDI",+ "type": "input",+ "description": "SPI bus input data; 24-bit word loaded MSB first under SCLK control."+ },+ {+ "number": "4",+ "name": "SDO",+ "type": "tri_state",+ "description": "SPI data output (tri-state); high-impedance when CS is high, can daisy-chain to next device SDI."+ },+ {+ "number": "5",+ "name": "LDAC",+ "type": "input",+ "description": "Load DAC latch control input (active low); transfers Input Data Register to DAC latch and updates outputs."+ },+ {+ "number": "6",+ "name": "RST",+ "type": "input",+ "description": "Reset input (active low); resets input registers and DACs to values defined by UNI/BIP pins."+ },+ {+ "number": "7",+ "name": "GPIO-0",+ "type": "bidirectional",+ "description": "General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output."+ },+ {+ "number": "8",+ "name": "GPIO-1",+ "type": "bidirectional",+ "description": "General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output."+ },+ {+ "number": "9",+ "name": "UNI/BIP-A",+ "type": "input",+ "description": "Output mode selection for group A (DAC-0, DAC-1); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V)."+ },+ {+ "number": "10",+ "name": "DGND",+ "type": "power_in",+ "description": "Digital ground; return path for digital circuits."+ },+ {+ "number": "11",+ "name": "IOVDD",+ "type": "power_in",+ "description": "Interface logic power supply; 1.8V to DVDD, supports 1.8V/3V/5V logic levels."+ },+ {+ "number": "12",+ "name": "DVDD",+ "type": "power_in",+ "description": "Digital power supply; 2.7V to 5.5V, powers digital circuits and SPI interface."+ },+ {+ "number": "13",+ "name": "VOUT-0",+ "type": "output",+ "description": "DAC-0 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."+ },+ {+ "number": "14",+ "name": "RFB2-0",+ "type": "output",+ "description": "DAC-0 RFB2 feedback resistor pin; connect to VOUT-0 with RFB1-0 for gain=2, leave open for gain=4."+ },+ {+ "number": "15",+ "name": "RFB1-0",+ "type": "output",+ "description": "DAC-0 RFB1 feedback resistor pin; connect to VOUT-0 for gain=2 or gain=4 configurations."+ },+ {+ "number": "16",+ "name": "SGND-0",+ "type": "power_in",+ "description": "DAC-0 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity."+ },+ {+ "number": "17",+ "name": "SGND-1",+ "type": "power_in",+ "description": "DAC-1 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity."+ },+ {+ "number": "18",+ "name": "RFB1-1",+ "type": "output",+ "description": "DAC-1 RFB1 feedback resistor pin; connect to VOUT-1 for gain=2 or gain=4 configurations."+ },+ {+ "number": "19",+ "name": "RFB2-1",+ "type": "output",+ "description": "DAC-1 RFB2 feedback resistor pin; connect to VOUT-1 with RFB1-1 for gain=2, leave open for gain=4."+ },+ {+ "number": "20",+ "name": "VOUT-1",+ "type": "output",+ "description": "DAC-1 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."+ },+ {+ "number": "21",+ "name": "AVDD",+ "type": "power_in",+ "description": "Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages."+ },+ {+ "number": "22",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground; power ground for DAC, must connect to REFGND-A and REFGND-B."+ },+ {+ "number": "23",+ "name": "AVSS",+ "type": "power_in",+ "description": "Negative analog power supply; -18V to -4.75V, provides return path for analog power."+ },+ {+ "number": "24",+ "name": "REFGND-A",+ "type": "power_in",+ "description": "Reference ground for REF-A; connect to AGND and SGND-0/SGND-1 with very low impedance traces."+ },+ {+ "number": "25",+ "name": "REF-A",+ "type": "input",+ "description": "Reference input for group A (DAC-0, DAC-1); typically +5V, sets output span for group A channels."+ },+ {+ "number": "26",+ "name": "REF-B",+ "type": "input",+ "description": "Reference input for group B (DAC-2, DAC-3); typically +5V, sets output span for group B channels."+ },+ {+ "number": "27",+ "name": "REFGND-B",+ "type": "power_in",+ "description": "Reference ground for REF-B; connect to AGND and SGND-2/SGND-3 with very low impedance traces."+ },+ {+ "number": "28",+ "name": "AVSS",+ "type": "power_in",+ "description": "Negative analog power supply; -18V to -4.75V, provides return path for analog power."+ },+ {+ "number": "29",+ "name": "VMON",+ "type": "output",+ "description": "Analog monitor output (high-impedance when disabled); multiplexes one of four DAC outputs or AIN via Monitor Register."+ },+ {+ "number": "30",+ "name": "AVDD",+ "type": "power_in",+ "description": "Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages."+ },+ {+ "number": "31",+ "name": "VOUT-3",+ "type": "output",+ "description": "DAC-3 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."+ },+ {+ "number": "32",+ "name": "RFB2-3",+ "type": "output",+ "description": "DAC-3 RFB2 feedback resistor pin; connect to VOUT-3 with RFB1-3 for gain=2, leave open for gain=4."+ },+ {+ "number": "33",+ "name": "RFB1-3",+ "type": "output",+ "description": "DAC-3 RFB1 feedback resistor pin; connect to VOUT-3 for gain=2 or gain=4 configurations."+ },+ {+ "number": "34",+ "name": "SGND-3",+ "type": "power_in",+ "description": "DAC-3 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity."+ },+ {+ "number": "35",+ "name": "SGND-2",+ "type": "power_in",+ "description": "DAC-2 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity."+ },+ {+ "number": "36",+ "name": "RFB1-2",+ "type": "output",+ "description": "DAC-2 RFB1 feedback resistor pin; connect to VOUT-2 for gain=2 or gain=4 configurations."+ },+ {+ "number": "37",+ "name": "RFB2-2",+ "type": "output",+ "description": "DAC-2 RFB2 feedback resistor pin; connect to VOUT-2 with RFB1-2 for gain=2, leave open for gain=4."+ },+ {+ "number": "38",+ "name": "VOUT-2",+ "type": "output",+ "description": "DAC-2 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."+ },+ {+ "number": "39",+ "name": "AIN",+ "type": "input",+ "description": "Auxiliary analog input; routed to analog monitor multiplexer (VMON), accepts AVSS-0.3V to AVDD+0.3V."+ },+ {+ "number": "40",+ "name": "UNI/BIP-B",+ "type": "input",+ "description": "Output mode selection for group B (DAC-2, DAC-3); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V)."+ },+ {+ "number": "41",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 41 added from the footprint"+ ],+ "pages_sent": 14,+ "cost_usd": 0.2022,+ "at": "2026-10-07T02:19:30"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/dac8734",+ "pages": 51,+ "sha256": "6fd4329aabd41484",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 41,+ "described": 41,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "dac8734srhar.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 6,+ 1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "dac8734srhar-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 6,+ 1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "7150da822d45da72d3f47df1c723d080e6b17d66ffd8ad5da37d95d1a9cb0666",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}