# TPA721DGNR

**Texas Instruments** · Audio Power OpAmps · HVSSOP-8-EP

TPA721DGNR from Texas Instruments, in a HVSSOP-8-EP. 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 | SHUTDOWN | input | SHUTDOWN places the entire device in shutdown mode when held high, with VIH of 0.9 VDD minimum and VIL of 0.1 VDD maximum. |
| 2 | BYPASS | input | BYPASS is the tap to the voltage divider for internal mid-supply bias and should be connected to a 0.1-µF to 2.2-µF capacitor when used as an audio amplifier. |
| 3 | IN+ | input | IN+ is the noninverting input and is typically tied to the BYPASS terminal. |
| 4 | IN- | input | IN- is the inverting input and is typically used as the audio input terminal. |
| 5 | VO+ | output | VO+ is the positive BTL (bridge-tied load) output. |
| 6 | VDD | power_in | VDD is the supply voltage terminal, specified from 2.5 V to 5.5 V. |
| 7 | GND | power_in | GND is the ground connection. |
| 8 | VO- | output | VO- is the negative BTL (bridge-tied load) output. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HVSSOP-8-EP |
| Category | Operational Amplifier/Comparator |
| Pins | 9 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VDD | 2.5 |  | 5.5 | V |  | 3 |
| High-level voltage (SHUTDOWN) | VIH | 0.9 |  |  | V | printed as 0.9 VDD | 3 |
| Low-level voltage (SHUTDOWN) | VIL |  |  | 0.1 | V | printed as 0.1 VDD | 3 |
| Operating free-air temperature | TA | -40 |  | 85 | °C |  | 3 |
| Supply voltage | VDD |  |  | 6 | V |  | 2 |
| Input voltage | VI | -0.3 |  |  | V | printed as -0.3 V to VDD +0.3 V; upper limit not numeric | 2 |
| Operating free-air temperature range | TA | -40 |  | 85 | °C |  | 2 |
| Operating junction temperature range | TJ | -40 |  | 150 | °C |  | 2 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 2 |
| Lead temperature |  |  |  | 260 | °C | 1,6 mm (1/16 inch) from case for 10 seconds | 2 |
| Supply current | IDD |  | 1.25 | 2.5 | mA | VDD = 3.3 V, TA = 25°C; SHUTDOWN = 0 V, RF = 10 kΩ | 3 |
| Supply current, shutdown mode | IDD(SD) |  | 7 | 50 | µA | VDD = 3.3 V, TA = 25°C; SHUTDOWN = VDD, RF = 10 kΩ | 3 |
| Supply current, shutdown mode | IDD(SD) |  | 50 | 100 | µA | VDD = 5 V, TA = 25°C; SHUTDOWN = VDD, RF = 10 kΩ | 3 |
| Power dissipation rating, DGN package |  |  |  | 2.14 | W | TA ≤ 25°C; DGN package; derating 17.1 mW/°C; footnote (1) PowerPAD board per SLMA002 | 3 |

## CAD (KiCad official)

- Symbol: `TPA721DGNR`
- Footprint: `Package_SO:HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm`
- 3D model: HVSSOP-8-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.0 mm nominal HVSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `tpa721dgnr-etched.step` / `tpa721dgnr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpa721dgnr.step` / `tpa721dgnr.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/tpa721) (31 pp, sha256 `0ae398855cbb6039`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/tpa721dgnr-datasheet.pdf)