DAC7750IRHAT

@@ -0,0 +1,86 @@+# DAC7750IRHAT++**Texas Instruments** · Digital To Analog Converters (DAC) · VQFN-40-EP(6x6)++DAC7750IRHAT from Texas Instruments, in a VQFN-40-EP(6x6). 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 | NC | unconnected | No connection. |+| 2 | ALARM | output | Alarm pin. Open-drain digital output requiring an external pull-up (~10 kΩ). Goes low (active) on ALARM conditions (open circuit, over-temperature, watchdog timeout, etc.). |+| 3 | GND | power_in | Digital ground reference for the device. |+| 4 | GND | power_in | Digital ground reference for the device. |+| 5 | CLR | input | Clear input. Active-high digital input; a logic high forces the part into the CLEAR state (drives IOUT to the pre-programmed clear condition). |+| 6 | LATCH | input | Load-DAC latch input. A rising edge transfers the 24-bit input shift register data into the DAC data and control registers and updates the output. |+| 7 | SCLK | input | SPI serial clock input, up to 30 MHz. Schmitt-trigger logic input. |+| 8 | DIN | input | SPI serial data input (MOSI). Data are clocked into the 24-bit input shift register on the rising edge of SCLK. Schmitt-trigger logic input. |+| 9 | SDO | output | SPI serial data output (MISO). Data are valid on the rising edge of SCLK. |+| 10 | NC | unconnected | No connection. |+| 11 | NC | unconnected | No connection. |+| 12 | GND | power_in | Analog ground reference for the device. |+| 13 | GND | power_in | Analog ground reference for the device. |+| 14 | GND | power_in | Analog ground reference for the device. |+| 15 | GND | power_in | Analog ground reference for the device. |+| 16 | ISET-R | passive | External precision RSET resistor connection (~15 kΩ) that sets the output-current full-scale reference for the current mirror. |+| 17 | REFOUT | output | Internal 5 V reference output (10 ppm/°C). Tie to REFIN when using the internal reference; max sourced current 10 mA. |+| 18 | REFIN | input | Reference input for the DAC (nominal 4.95 V-5.05 V). Connect to REFOUT for internal-reference operation, or drive externally. |+| 19 | NC | unconnected | No connection. |+| 20 | NC | unconnected | No connection. |+| 21 | NC | unconnected | No connection. |+| 22 | NC | unconnected | No connection. |+| 23 | DVDD-EN | input | Internal digital-supply enable. Tie to GND to disable the internal DVDD LDO and drive DVDD externally; leave floating to enable the internal 4.6 V supply that then appears on DVDD. |+| 24 | HART-IN | input | HART modulation input; injects an external HART FSK signal onto the current output. |+| 25 | R3-SENSE | output | Output-current monitor pin. The voltage between R3-SENSE and BOOST is directly proportional to IOUT (internal sense resistor). |+| 26 | IOUT | output | Programmable current output pin (0-20 mA, 4-20 mA, or 0-24 mA). Loop compliance voltage is AVDD − 2 V at 24 mA. |+| 27 | BOOST | output | External-transistor connection (optional). Reduces on-chip power dissipation by offloading the output pass device. |+| 28 | CAP1 | passive | Output filtering capacitor connection (optional). |+| 29 | CAP2 | passive | Output filtering capacitor connection (optional). |+| 30 | NC | unconnected | No connection. |+| 31 | NC | unconnected | No connection. |+| 32 | NC | unconnected | No connection. |+| 33 | NC | unconnected | No connection. |+| 34 | NC | unconnected | No connection. |+| 35 | NC | unconnected | No connection. |+| 36 | AVDD | power_in | Positive analog supply, 10 V to 36 V. |+| 37 | GND | power_in | Analog ground reference for the device. |+| 38 | NC | unconnected | No connection. |+| 39 | DVDD | power_in | Digital supply, 2.7 V to 5.5 V. Acts as an input when the internal DVDD LDO is disabled (DVDD-EN tied to GND), otherwise sources the internal 4.6 V rail as an output. |+| 40 | NC | unconnected | No connection. |+| 41 | PAD | power_in | Thermal pad, internally connected to GND. Solder to a copper plane for thermal performance; may be tied to GND or left electrically floating provided the GND pins are connected. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-40-EP(6x6) |+| Category | Data Acquisition |+| Pins | 41 |++## Ordering variants++Same part, different packaging or reel option.++- `DAC7750IRHAT`+- `DAC7750IRHAR`+- `DAC7750IRHATIPWP`+- `DAC7750IRHATIPWPR`++## CAD (KiCad official)++- Symbol: `DAC7750IRHAT`+- Footprint: `Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm`+- 3D model: VQFN-40-EP(6x6) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/dac7750) (None pp, sha256 `2f63242163158dd1`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/dac7750irhat-datasheet.pdf)