AD8436ACPZ-R7

@@ -0,0 +1,75 @@+# AD8436ACPZ-R7++**Analog Devices** · RMS To DC Converters · LFCSP-20(4x4)++AD8436ACPZ-R7 from Analog Devices, in a LFCSP-20(4x4). 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 | DNC | unconnected | Do Not Connect. Used for factory test - leave floating. |+| 2 | RMS | input | AC input to the RMS core. Feeds the internal 8 kΩ RMS core input resistor. |+| 3 | IBUFOUT | output | FET input buffer output pin. Buffered high-Z input signal available here for external routing to the RMS core. |+| 4 | IBUFIN- | input | FET input buffer inverting input pin. Together with the optional 10 kΩ gain resistor sets the buffer gain. |+| 5 | IBUFIN+ | input | FET input buffer noninverting input pin. High-impedance (>10^12 Ω, ≤2 pF) signal input to the on-board FET buffer. |+| 6 | IBUFGN | passive | Optional 10 kΩ precision gain resistor node for setting the FET input buffer gain (typically gain of ×2 or more). |+| 7 | DNC | unconnected | Do Not Connect. Used for factory test - leave floating. |+| 8 | OGND | passive | Internal 16 kΩ I-to-V resistor node. Ground reference for the output current-to-voltage conversion. |+| 9 | OUT | output | RMS core voltage or current output. Provides the DC-equivalent RMS result; output resistance ~16 kΩ. |+| 10 | VEE | power_in | Negative supply rail. -2.4 V to -18 V dual-supply, or GND for single-supply operation (4.8 V to 36 V total). |+| 11 | IGND | passive | Half-supply node. Provides the mid-rail reference used for single-supply biasing of the input signal path. |+| 12 | OBUFIN+ | input | Output buffer noninverting input pin. Signal input to the precision DC output buffer amplifier. |+| 13 | OBUFIN- | input | Output buffer inverting input pin. Feedback node of the precision DC output buffer. |+| 14 | OBUFOUT | output | Output buffer output pin. Drives low-impedance loads with up to 15 mA source / 0.5 mA sink current. |+| 15 | OBUFV+ | power_in | Positive supply pin dedicated to the DC output buffer. Typically tied to VCC. |+| 16 | IBUFV+ | power_in | Positive supply pin dedicated to the FET input buffer. Typically tied to VCC. |+| 17 | VCC | power_in | Positive supply rail for the RMS core. +2.4 V to +18 V (dual) or 4.8 V to 36 V (single supply). |+| 18 | CCF | passive | Connection for crest factor capacitor. External capacitor (typ. 0.1 µF) extends usable crest factor up to 10. |+| 19 | CAVG | passive | Connection for averaging capacitor. External CAVG (typ. 10 µF) sets the RMS averaging time constant. |+| 20 | SUM | input | Summing amplifier input pin. Signal summing node feeding the RMS core. |+| EP | EP | passive | Exposed pad. Connection to ground is optional; leave floating or tie to GND for improved thermal performance. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Analog Devices |+| Package | LFCSP-20(4x4) |+| Category | Data Acquisition |+| Pins | 21 |++## Ordering variants++Same part, different packaging or reel option.++- `AD8436ACPZ-R7`+- `AD8436ACPZ-RL`+- `AD8436ACPZ-WP`+- `AD8436ACPZ-R7BCPZ-R7`+- `AD8436ACPZ-R7BCPZ-RL`+- `AD8436ACPZ-R7BCPZ-WP`+- `AD8436ACPZ-R7JCPZ-R7`+- `AD8436ACPZ-R7JCPZ-RL`+- `AD8436ACPZ-R7ARQZ-R7`+- `AD8436ACPZ-R7ARQZ-RL`+- `AD8436ACPZ-R7ARQZ`+- `AD8436ACPZ-R7BRQZ-R7`+- `AD8436ACPZ-R7BRQZ-RL`+- `AD8436ACPZ-R7BRQZ`++## CAD (KiCad official)++- Symbol: `AD8436ACPZ-R7`+- Footprint: `Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm`+- 3D model: LFCSP-20(4x4) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918356287606784) (21 pp, sha256 `257a2ad3a0ca7909`, retrieved 2026-08-17, tier: lcsc)+- **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/ad8436acpz-r7-datasheet.pdf)

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