ADS131M04

@@ -0,0 +1,63 @@+# ADS131M04++**Texas Instruments** · Delta-sigma ADC · TSSOP-20++Digitizes four differential inputs at once, each with its own 24-bit delta-sigma modulator and programmable gain amplifier, so phase between channels is preserved for energy and vibration measurement. A four-wire SPI moves conversion data at up to 32 kSPS per channel, and per-channel PGA gains up to 128 handle small sensor signals directly. Runs from a 2.7 to 3.6 V analog supply with a separate digital supply. Aimed at power metering and condition monitoring.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | AVDD | power_in | Analog supply, 2.7 V to 3.6 V. Connect a 1-µF decoupling capacitor to AGND. |+| 2 | AGND | power_in | Analog ground reference for AVDD and the ADC analog front-end. |+| 3 | AIN0P | input | Positive differential analog input, channel 0. Input range referenced to AGND with an AVDD+0.3 V ceiling. |+| 4 | AIN0N | input | Negative differential analog input, channel 0. |+| 5 | AIN1N | input | Negative differential analog input, channel 1. |+| 6 | AIN1P | input | Positive differential analog input, channel 1. |+| 7 | AIN2P | input | Positive differential analog input, channel 2. |+| 8 | AIN2N | input | Negative differential analog input, channel 2. |+| 9 | AIN3N | input | Negative differential analog input, channel 3. |+| 10 | AIN3P | input | Positive differential analog input, channel 3. |+| 11 | SYNC/RESET | input | Conversion synchronization or system reset, active low. Digital input referenced to DGND/DVDD. |+| 12 | CS | input | SPI chip select, active low. Enables the serial interface for the current transaction. |+| 13 | DRDY | output | Data-ready indicator, active low. Falls when a new conversion result is available in the output register. |+| 14 | SCLK | input | SPI serial data clock. Shifts DIN in and DOUT out on opposite edges. |+| 15 | DOUT | output | SPI serial data output. Presents conversion data and register-read responses. |+| 16 | DIN | input | SPI serial data input. Accepts commands and register writes. |+| 17 | CLKIN | input | Master clock input, nominal 8.192 MHz. Drives the modulator and internal digital filter timing. |+| 18 | CAP | power_out | Internal LDO regulator output. Connect a 220-nF capacitor to DGND; do not load externally. |+| 19 | DGND | power_in | Digital ground reference for DVDD and the digital I/O. |+| 20 | DVDD | power_in | Digital I/O supply, 2.7 V to 3.6 V. Connect a 1-µF decoupling capacitor to DGND. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | 4-channel simultaneous-sampling delta-sigma ADC |+| Resolution | 24-bit |+| Channels | 4 differential |+| PGA gain | 1 to 128 per channel |+| Data rate | Up to 32 kSPS/channel |+| Interface | SPI |+| Analog supply | 2.7-3.6 V |+| Package | TSSOP-20 |++## Ordering variants++- `ADS131M04IPWR (TSSOP-20, tape & reel)`++## CAD (KiCad official)++- Symbol: `Analog_ADC:ADS131M04xPW (KiCad official)`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ads131m04.pdf) (105 pp, sha256 `487bfd27103d0bac`, retrieved 2026-08-17, tier: manufacturer)+- **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/ads131m04-datasheet.pdf)

@@ -0,0 +1,39 @@+{+  "slug": "ads131m04",+  "version": "0.1.0",+  "type": "component",+  "description": "TI 4-channel, 24-bit, simultaneously-sampling delta-sigma ADC, TSSOP-20. SPI, integrated PGA, up to 32 kSPS. Datasheet-verified.",+  "tags": [+    "component",+    "data-converter",+    "adc",+    "delta-sigma",+    "24-bit",+    "spi",+    "tssop-20",+    "texas-instruments"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "ads131m04.kicad_sym",+    "ads131m04.kicad_mod",+    "ads131m04.glb",+    "ads131m04.step",+    "ads131m04.lbr",+    "docs/hero.png",+    "docs/ads131m04-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file